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From agoncha...@apache.org
Subject [25/50] [abbrv] incubator-ignite git commit: Merge remote-tracking branch 'remotes/origin/sprint-1' into ignite-67
Date Sat, 31 Jan 2015 03:55:25 GMT
http://git-wip-us.apache.org/repos/asf/incubator-ignite/blob/ac05bb9c/modules/core/src/main/java/org/apache/ignite/internal/util/IgniteUtils.java
----------------------------------------------------------------------
diff --cc modules/core/src/main/java/org/apache/ignite/internal/util/IgniteUtils.java
index 0000000,fedf24b..013367f
mode 000000,100644..100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/util/IgniteUtils.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/util/IgniteUtils.java
@@@ -1,0 -1,9141 +1,9141 @@@
+ /*
+  * Licensed to the Apache Software Foundation (ASF) under one or more
+  * contributor license agreements.  See the NOTICE file distributed with
+  * this work for additional information regarding copyright ownership.
+  * The ASF licenses this file to You under the Apache License, Version 2.0
+  * (the "License"); you may not use this file except in compliance with
+  * the License.  You may obtain a copy of the License at
+  *
+  *      http://www.apache.org/licenses/LICENSE-2.0
+  *
+  * Unless required by applicable law or agreed to in writing, software
+  * distributed under the License is distributed on an "AS IS" BASIS,
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  */
+ 
+ package org.apache.ignite.internal.util;
+ 
+ import org.apache.ignite.*;
+ import org.apache.ignite.cache.*;
+ import org.apache.ignite.cluster.*;
+ import org.apache.ignite.compute.*;
+ import org.apache.ignite.configuration.*;
+ import org.apache.ignite.events.*;
+ import org.apache.ignite.internal.*;
+ import org.apache.ignite.internal.mxbean.*;
+ import org.apache.ignite.internal.processors.cache.*;
+ import org.apache.ignite.internal.processors.cache.version.*;
+ import org.apache.ignite.lang.*;
+ import org.apache.ignite.lifecycle.*;
+ import org.apache.ignite.portables.*;
+ import org.apache.ignite.spi.*;
+ import org.apache.ignite.internal.managers.deployment.*;
+ import org.apache.ignite.internal.processors.streamer.*;
+ import org.apache.ignite.spi.discovery.*;
+ import org.apache.ignite.internal.util.io.*;
+ import org.apache.ignite.internal.util.lang.*;
+ import org.apache.ignite.internal.util.typedef.*;
+ import org.apache.ignite.internal.util.typedef.internal.*;
+ import org.apache.ignite.internal.util.worker.*;
+ import org.jdk8.backport.*;
+ import org.jetbrains.annotations.*;
+ import sun.misc.*;
+ 
+ import javax.management.*;
+ import javax.naming.*;
+ import javax.net.ssl.*;
+ import java.io.*;
+ import java.lang.annotation.Annotation;
+ import java.lang.management.*;
+ import java.lang.reflect.Array;
+ import java.lang.reflect.*;
+ import java.math.*;
+ import java.net.*;
+ import java.nio.*;
+ import java.nio.channels.*;
+ import java.nio.channels.spi.*;
+ import java.nio.charset.*;
+ import java.security.*;
+ import java.security.cert.*;
+ import java.sql.*;
+ import java.sql.Timestamp;
+ import java.text.*;
+ import java.util.*;
+ import java.util.Date;
+ import java.util.concurrent.*;
+ import java.util.concurrent.atomic.*;
+ import java.util.concurrent.locks.*;
+ import java.util.jar.*;
+ import java.util.logging.*;
+ import java.util.regex.*;
+ import java.util.zip.*;
+ 
+ import static org.apache.ignite.IgniteSystemProperties.*;
+ import static org.apache.ignite.events.IgniteEventType.*;
+ import static org.apache.ignite.internal.GridNodeAttributes.*;
+ 
+ /**
+  * Collection of utility methods used throughout the system.
+  */
+ @SuppressWarnings({"UnusedReturnValue", "UnnecessaryFullyQualifiedName"})
+ public abstract class IgniteUtils {
+     /** Unsafe. */
+     private static final Unsafe UNSAFE = GridUnsafe.unsafe();
+ 
+     /** {@code True} if {@code unsafe} should be used for array copy. */
+     private static final boolean UNSAFE_BYTE_ARR_CP = unsafeByteArrayCopyAvailable();
+ 
+     /** Offset. */
+     private static final int BYTE_ARRAY_DATA_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
+ 
+     /** Sun-specific JDK constructor factory for objects that don't have empty constructor. */
+     private static final Method CTOR_FACTORY;
+ 
+     /** Sun JDK reflection factory. */
+     private static final Object SUN_REFLECT_FACTORY;
+ 
+     /** Public {@code java.lang.Object} no-argument constructor. */
+     private static final Constructor OBJECT_CTOR;
+ 
+     /** All grid event names. */
+     private static final Map<Integer, String> GRID_EVT_NAMES = new HashMap<>();
+ 
+     /** All grid events. */
+     private static final int[] GRID_EVTS;
+ 
+     /** Empty integers array. */
+     private static final int[] EMPTY_INTS = new int[0];
+ 
+     /** Empty  longs. */
+     private static final long[] EMPTY_LONGS = new long[0];
+ 
+     /** System line separator. */
+     private static final String NL = System.getProperty("line.separator");
+ 
+     /** Default user version. */
+     public static final String DFLT_USER_VERSION = "0";
+ 
+     /** Cache for {@link GridPeerDeployAware} fields to speed up reflection. */
+     private static final ConcurrentMap<String, IgniteBiTuple<Class<?>, Collection<Field>>> p2pFields =
+         new ConcurrentHashMap8<>();
+ 
+     /** Secure socket protocol to use. */
+     private static final String HTTPS_PROTOCOL = "TLS";
+ 
+     /** Project home directory. */
+     private static volatile GridTuple<String> ggHome;
+ 
+     /** Project work directory. */
+     private static volatile String ggWork;
+ 
+     /** OS JDK string. */
+     private static String osJdkStr;
+ 
+     /** OS string. */
+     private static String osStr;
+ 
+     /** JDK string. */
+     private static String jdkStr;
+ 
+     /** Indicates whether current OS is Windows 95. */
+     private static boolean win95;
+ 
+     /** Indicates whether current OS is Windows 98. */
+     private static boolean win98;
+ 
+     /** Indicates whether current OS is Windows NT. */
+     private static boolean winNt;
+ 
+     /** Indicates whether current OS is Windows Vista. */
+     private static boolean winVista;
+ 
+     /** Indicates whether current OS is Windows 7. */
+     private static boolean win7;
+ 
+     /** Indicates whether current OS is Windows 8. */
+     private static boolean win8;
+ 
+     /** Indicates whether current OS is Windows 8.1. */
+     private static boolean win81;
+ 
+     /** Indicates whether current OS is some version of Windows. */
+     private static boolean unknownWin;
+ 
+     /** Indicates whether current OS is Windows 2000. */
+     private static boolean win2k;
+ 
+     /** Indicates whether current OS is Windows XP. */
+     private static boolean winXp;
+ 
+     /** Indicates whether current OS is Windows Server 2003. */
+     private static boolean win2003;
+ 
+     /** Indicates whether current OS is Windows Server 2008. */
+     private static boolean win2008;
+ 
+     /** Indicates whether current OS is UNIX flavor. */
+     private static boolean unix;
+ 
+     /** Indicates whether current OS is Solaris. */
+     private static boolean solaris;
+ 
+     /** Indicates whether current OS is Linux flavor. */
+     private static boolean linux;
+ 
+     /** Indicates whether current OS is NetWare. */
+     private static boolean netware;
+ 
+     /** Indicates whether current OS is Mac OS. */
+     private static boolean mac;
+ 
+     /** Indicates whether current OS architecture is Sun Sparc. */
+     private static boolean sparc;
+ 
+     /** Indicates whether current OS architecture is Intel X86. */
+     private static boolean x86;
+ 
+     /** Name of the underlying OS. */
+     private static String osName;
+ 
+     /** Version of the underlying OS. */
+     private static String osVer;
+ 
+     /** CPU architecture of the underlying OS. */
+     private static String osArch;
+ 
+     /** Name of the Java Runtime. */
+     private static String javaRtName;
+ 
+     /** Name of the Java Runtime version. */
+     private static String javaRtVer;
+ 
+     /** Name of the JDK vendor. */
+     private static String jdkVendor;
+ 
+     /** Name of the JDK. */
+     private static String jdkName;
+ 
+     /** Version of the JDK. */
+     private static String jdkVer;
+ 
+     /** Name of JVM specification. */
+     private static String jvmSpecName;
+ 
+     /** Version of JVM implementation. */
+     private static String jvmImplVer;
+ 
+     /** Vendor's name of JVM implementation. */
+     private static String jvmImplVendor;
+ 
+     /** Name of the JVM implementation. */
+     private static String jvmImplName;
+ 
+     /** JMX domain as 'xxx.gridgain'. */
+     public static final String JMX_DOMAIN = IgniteUtils.class.getName().substring(0, IgniteUtils.class.getName().
+         indexOf('.', IgniteUtils.class.getName().indexOf('.') + 1));
+ 
+     /** Network packet header. */
 -    public static final byte[] GG_HEADER = U.intToBytes(0x00004747);
++    public static final byte[] IGNITE_HEADER = U.intToBytes(0x00004747);
+ 
+     /** Default buffer size = 4K. */
+     private static final int BUF_SIZE = 4096;
+ 
+     /** Byte bit-mask. */
+     private static final int MASK = 0xf;
+ 
+     /** Long date format pattern for log messages. */
+     private static final SimpleDateFormat LONG_DATE_FMT = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
+ 
+     /**
+      * Short date format pattern for log messages in "quiet" mode.
+      * Only time is included since we don't expect "quiet" mode to be used
+      * for longer runs.
+      */
+     private static final SimpleDateFormat SHORT_DATE_FMT = new SimpleDateFormat("HH:mm:ss");
+ 
+     /** Debug date format. */
+     private static final SimpleDateFormat DEBUG_DATE_FMT = new SimpleDateFormat("HH:mm:ss,SSS");
+ 
+     /** Cached local host address to make sure that every time the same local host is returned. */
+     private static InetAddress locHost;
+ 
+     /** */
+     static volatile long curTimeMillis = System.currentTimeMillis();
+ 
+     /** Primitive class map. */
+     private static final Map<String, Class<?>> primitiveMap = new HashMap<>(16, .5f);
+ 
+     /** Boxed class map. */
+     private static final Map<Class<?>, Class<?>> boxedClsMap = new HashMap<>(16, .5f);
+ 
+     /** Class loader used to load GridGain. */
+     private static final ClassLoader gridClassLoader = IgniteUtils.class.getClassLoader();
+ 
+     /** MAC OS invalid argument socket error message. */
+     public static final String MAC_INVALID_ARG_MSG = "On MAC OS you may have too many file descriptors open " +
+         "(simple restart usually solves the issue)";
+ 
+     /** Default help pages. */
+     public static final List<String> DFLT_HELP_LINKS = Arrays.asList(
+         "Troubleshooting:      http://bit.ly/GridGain-Troubleshooting",
+         "Documentation Center: http://bit.ly/GridGain-Documentation");
+ 
+     /** Portable classes. */
+     private static final Collection<Class<?>> PORTABLE_CLS = new HashSet<>();
+ 
+     /** GridGain Logging Directory. */
 -    public static final String GRIDGAIN_LOG_DIR = System.getenv(GG_LOG_DIR);
++    public static final String IGNITE_LOG_DIR = System.getenv(IgniteSystemProperties.IGNITE_LOG_DIR);
+ 
+     /** GridGain Work Directory. */
 -    public static final String GRIDGAIN_WORK_DIR = System.getenv(GG_WORK_DIR);
++    public static final String IGNITE_WORK_DIR = System.getenv(IgniteSystemProperties.IGNITE_WORK_DIR);
+ 
+     /** Clock timer. */
+     private static Thread timer;
+ 
+     /** Grid counter. */
+     private static int gridCnt;
+ 
+     /** Mutex. */
+     private static final Object mux = new Object();
+ 
+     /**
+      * Initializes enterprise check.
+      */
+     static {
+         String osName = System.getProperty("os.name");
+ 
+         String osLow = osName.toLowerCase();
+ 
+         // OS type detection.
+         if (osLow.contains("win")) {
+             if (osLow.contains("95"))
+                 win95 = true;
+             else if (osLow.contains("98"))
+                 win98 = true;
+             else if (osLow.contains("nt"))
+                 winNt = true;
+             else if (osLow.contains("2000"))
+                 win2k = true;
+             else if (osLow.contains("vista"))
+                 winVista = true;
+             else if (osLow.contains("xp"))
+                 winXp = true;
+             else if (osLow.contains("2003"))
+                 win2003 = true;
+             else if (osLow.contains("2008"))
+                 win2008 = true;
+             else if (osLow.contains("7"))
+                 win7 = true;
+             else if (osLow.contains("8.1"))
+                 win81 = true;
+             else if (osLow.contains("8"))
+                 win8 = true;
+             else
+                 unknownWin = true;
+         }
+         else if (osLow.contains("netware"))
+             netware = true;
+         else if (osLow.contains("mac os"))
+             mac = true;
+         else {
+             // UNIXs flavors tokens.
+             for (CharSequence os : new String[]{"ix", "inux", "olaris", "un", "ux", "sco", "bsd", "att"})
+                 if (osLow.contains(os)) {
+                     unix = true;
+ 
+                     break;
+                 }
+ 
+             // UNIX name detection.
+             if (osLow.contains("olaris"))
+                 solaris = true;
+             else if (osLow.contains("inux"))
+                 linux = true;
+         }
+ 
+         String osArch = System.getProperty("os.arch");
+ 
+         String archStr = osArch.toLowerCase();
+ 
+         // OS architecture detection.
+         if (archStr.contains("x86"))
+             x86 = true;
+         else if (archStr.contains("sparc"))
+             sparc = true;
+ 
+         String javaRtName = System.getProperty("java.runtime.name");
+         String javaRtVer = System.getProperty("java.runtime.version");
+         String jdkVendor = System.getProperty("java.specification.vendor");
+         String jdkName = System.getProperty("java.specification.name");
+         String jdkVer = System.getProperty("java.specification.version");
+         String osVer = System.getProperty("os.version");
+         String jvmSpecName = System.getProperty("java.vm.specification.name");
+         String jvmImplVer = System.getProperty("java.vm.version");
+         String jvmImplVendor = System.getProperty("java.vm.vendor");
+         String jvmImplName = System.getProperty("java.vm.name");
+ 
+         String jdkStr = javaRtName + ' ' + javaRtVer + ' ' + jvmImplVendor + ' ' + jvmImplName + ' ' +
+             jvmImplVer;
+ 
+         osStr = osName + ' ' + osVer + ' ' + osArch;
+         osJdkStr = osLow + ", " + jdkStr;
+ 
+         // Copy auto variables to static ones.
+         IgniteUtils.osName = osName;
+         IgniteUtils.jdkName = jdkName;
+         IgniteUtils.jdkVendor = jdkVendor;
+         IgniteUtils.jdkVer = jdkVer;
+         IgniteUtils.jdkStr = jdkStr;
+         IgniteUtils.osVer = osVer;
+         IgniteUtils.osArch = osArch;
+         IgniteUtils.jvmSpecName = jvmSpecName;
+         IgniteUtils.jvmImplVer = jvmImplVer;
+         IgniteUtils.jvmImplVendor = jvmImplVendor;
+         IgniteUtils.jvmImplName = jvmImplName;
+         IgniteUtils.javaRtName = javaRtName;
+         IgniteUtils.javaRtVer = javaRtVer;
+ 
+         primitiveMap.put("byte", byte.class);
+         primitiveMap.put("short", short.class);
+         primitiveMap.put("int", int.class);
+         primitiveMap.put("long", long.class);
+         primitiveMap.put("float", float.class);
+         primitiveMap.put("double", double.class);
+         primitiveMap.put("char", char.class);
+         primitiveMap.put("boolean", boolean.class);
+ 
+         boxedClsMap.put(byte.class, Byte.class);
+         boxedClsMap.put(short.class, Short.class);
+         boxedClsMap.put(int.class, Integer.class);
+         boxedClsMap.put(long.class, Long.class);
+         boxedClsMap.put(float.class, Float.class);
+         boxedClsMap.put(double.class, Double.class);
+         boxedClsMap.put(char.class, Character.class);
+         boxedClsMap.put(boolean.class, Boolean.class);
+ 
+         try {
+             OBJECT_CTOR = Object.class.getConstructor();
+         }
+         catch (NoSuchMethodException e) {
+             throw withCause(new AssertionError("Object class does not have empty constructor (is JDK corrupted?)."), e);
+         }
+ 
+         // Constructor factory.
+         Method ctorFac = null;
+         Object refFac = null;
+ 
+         try {
+             Class<?> refFactoryCls = Class.forName("sun.reflect.ReflectionFactory");
+ 
+             refFac = refFactoryCls.getMethod("getReflectionFactory").invoke(null);
+ 
+             ctorFac = refFac.getClass().getMethod("newConstructorForSerialization", Class.class,
+                 Constructor.class);
+         }
+         catch (NoSuchMethodException | ClassNotFoundException | IllegalAccessException | InvocationTargetException ignored) {
+             // No-op.
+         }
+ 
+         CTOR_FACTORY = ctorFac;
+         SUN_REFLECT_FACTORY = refFac;
+ 
+         // Disable hostname SSL verification for development and testing with self-signed certificates.
 -        if (Boolean.parseBoolean(System.getProperty(GG_DISABLE_HOSTNAME_VERIFIER))) {
++        if (Boolean.parseBoolean(System.getProperty(IGNITE_DISABLE_HOSTNAME_VERIFIER))) {
+             HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
+                 @Override public boolean verify(String hostname, SSLSession sslSes) {
+                     return true;
+                 }
+             });
+         }
+ 
+         // Event names initialization.
+         for (Field field : IgniteEventType.class.getFields()) {
+             if (field.getType().equals(int.class)) {
+                 try {
+                     assert field.getName().startsWith("EVT_") : "Invalid event name (should start with 'EVT_': " +
+                         field.getName();
+ 
+                     int type = field.getInt(null);
+ 
+                     String prev = GRID_EVT_NAMES.put(type, field.getName().substring(4));
+ 
+                     // Check for duplicate event types.
+                     assert prev == null : "Duplicate event [type=" + type + ", name1=" + prev +
+                         ", name2=" + field.getName() + ']';
+                 }
+                 catch (IllegalAccessException e) {
+                     throw new IgniteException(e);
+                 }
+             }
+         }
+ 
+         // Event array initialization.
+         GRID_EVTS = toIntArray(GRID_EVT_NAMES.keySet());
+ 
+         // Sort for fast event lookup.
+         Arrays.sort(GRID_EVTS);
+ 
+         // We need to re-initialize EVTS_ALL and EVTS_ALL_MINUS_METRIC_UPDATE
+         // because they may have been initialized to null before GRID_EVTS were initialized.
+         if (EVTS_ALL == null || EVTS_ALL_MINUS_METRIC_UPDATE == null) {
+             try {
+                 Field f1 = IgniteEventType.class.getDeclaredField("EVTS_ALL");
+                 Field f2 = IgniteEventType.class.getDeclaredField("EVTS_ALL_MINUS_METRIC_UPDATE");
+ 
+                 assert f1 != null;
+                 assert f2 != null;
+ 
+                 // We use unsafe operations to update static fields on interface because
+                 // they are treated as static final and cannot be updated via standard reflection.
+                 UNSAFE.putObjectVolatile(UNSAFE.staticFieldBase(f1), UNSAFE.staticFieldOffset(f1), gridEvents());
+                 UNSAFE.putObjectVolatile(UNSAFE.staticFieldBase(f2), UNSAFE.staticFieldOffset(f2),
+                     gridEvents(EVT_NODE_METRICS_UPDATED));
+ 
+                 assert EVTS_ALL != null;
+                 assert EVTS_ALL.length == GRID_EVTS.length;
+ 
+                 assert EVTS_ALL_MINUS_METRIC_UPDATE != null;
+                 assert EVTS_ALL_MINUS_METRIC_UPDATE.length == GRID_EVTS.length - 1;
+ 
+                 // Validate correctness.
+                 for (int type : GRID_EVTS) {
+                     assert containsIntArray(EVTS_ALL, type);
+ 
+                     if (type != EVT_NODE_METRICS_UPDATED)
+                         assert containsIntArray(EVTS_ALL_MINUS_METRIC_UPDATE, type);
+                 }
+ 
+                 assert !containsIntArray(EVTS_ALL_MINUS_METRIC_UPDATE, EVT_NODE_METRICS_UPDATED);
+             }
+             catch (NoSuchFieldException e) {
+                 throw new IgniteException(e);
+             }
+         }
+ 
+         PORTABLE_CLS.add(Byte.class);
+         PORTABLE_CLS.add(Short.class);
+         PORTABLE_CLS.add(Integer.class);
+         PORTABLE_CLS.add(Long.class);
+         PORTABLE_CLS.add(Float.class);
+         PORTABLE_CLS.add(Double.class);
+         PORTABLE_CLS.add(Character.class);
+         PORTABLE_CLS.add(Boolean.class);
+         PORTABLE_CLS.add(String.class);
+         PORTABLE_CLS.add(UUID.class);
+         PORTABLE_CLS.add(Date.class);
+         PORTABLE_CLS.add(Timestamp.class);
+         PORTABLE_CLS.add(byte[].class);
+         PORTABLE_CLS.add(short[].class);
+         PORTABLE_CLS.add(int[].class);
+         PORTABLE_CLS.add(long[].class);
+         PORTABLE_CLS.add(float[].class);
+         PORTABLE_CLS.add(double[].class);
+         PORTABLE_CLS.add(char[].class);
+         PORTABLE_CLS.add(boolean[].class);
+         PORTABLE_CLS.add(String[].class);
+         PORTABLE_CLS.add(UUID[].class);
+         PORTABLE_CLS.add(Date[].class);
+         PORTABLE_CLS.add(Timestamp[].class);
+     }
+ 
+     /**
+      * @return System time approximated by 10 ms.
+      */
+     public static long currentTimeMillis() {
+         return curTimeMillis;
+     }
+ 
+     /**
+      * @return Value of {@link System#nanoTime()} in microseconds.
+      */
+     public static long microTime() {
+         return System.nanoTime() / 1000;
+     }
+ 
+     /**
+      * Gets nearest power of 2 larger or equal than v.
+      *
+      * @param v Value.
+      * @return Nearest power of 2.
+      */
+     public static int ceilPow2(int v) {
+         v--;
+ 
+         v |= v >> 1;
+         v |= v >> 2;
+         v |= v >> 4;
+         v |= v >> 8;
+         v |= v >> 16;
+ 
+         return ++v;
+     }
+ 
+     /**
+      * @param i Value.
+      * @return {@code true} If the given value is power of 2 (0 is not power of 2).
+      */
+     public static boolean isPow2(int i) {
+         return i > 0 && (i & (i - 1)) == 0;
+     }
+ 
+     /**
+      * Return SUN specific constructor factory.
+      *
+      * @return SUN specific constructor factory.
+      */
+     @Nullable public static Method ctorFactory() {
+         return CTOR_FACTORY;
+     }
+ 
+     /**
+      * @return Empty constructor for object class.
+      */
+     public static Constructor objectConstructor() {
+         return OBJECT_CTOR;
+     }
+ 
+     /**
+      * SUN JDK specific reflection factory for objects without public constructor.
+      *
+      * @return Reflection factory for objects without public constructor.
+      */
+     @Nullable public static Object sunReflectionFactory() {
+         return SUN_REFLECT_FACTORY;
+     }
+ 
+     /**
+      * Gets name for given grid event type.
+      *
+      * @param type Event type.
+      * @return Event name.
+      */
+     public static String gridEventName(int type) {
+         String name = GRID_EVT_NAMES.get(type);
+ 
+         return name != null ? name : Integer.toString(type);
+     }
+ 
+     /**
+      * Gets all event types.
+      *
+      * @param excl Optional exclude events.
+      * @return All events minus excluded ones.
+      */
+     public static int[] gridEvents(final int... excl) {
+         if (F.isEmpty(excl))
+             return GRID_EVTS;
+ 
+         List<Integer> evts = toIntList(GRID_EVTS, new P1<Integer>() {
+             @Override
+             public boolean apply(Integer i) {
+                 return !containsIntArray(excl, i);
+             }
+         });
+ 
+         return toIntArray(evts);
+     }
+ 
+     /**
+      * @param discoSpi Discovery SPI.
+      * @return {@code True} if ordering is supported.
+      */
+     public static boolean discoOrdered(DiscoverySpi discoSpi) {
+         DiscoverySpiOrderSupport ann = U.getAnnotation(discoSpi.getClass(), DiscoverySpiOrderSupport.class);
+ 
+         return ann != null && ann.value();
+     }
+ 
+     /**
+      * @return Checks if disco ordering should be enforced.
+      */
+     public static boolean relaxDiscoveryOrdered() {
 -        return "true".equalsIgnoreCase(System.getProperty(GG_NO_DISCO_ORDER));
++        return "true".equalsIgnoreCase(System.getProperty(IGNITE_NO_DISCO_ORDER));
+     }
+ 
+     /**
+      * This method should be used for adding quick debug statements in code
+      * while debugging. Calls to this method should never be committed to master.
+      *
+      * @param msg Message to debug.
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @Deprecated
+     public static void debug(Object msg) {
+         X.println(debugPrefix() + msg);
+     }
+ 
+     /**
+      * This method should be used for adding quick debug statements in code
+      * while debugging. Calls to this method should never be committed to master.
+      *
+      * @param msg Message to debug.
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @Deprecated
+     public static void debugx(String msg) {
+         X.printerrln(debugPrefix() + msg);
+     }
+ 
+     /**
+      * This method should be used for adding quick debug statements in code
+      * while debugging. Calls to this method should never be committed to master.
+      *
+      * @param log Logger.
+      * @param msg Message to debug.
+      *
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @Deprecated
+     public static void debug(IgniteLogger log, String msg) {
+         log.info(msg);
+     }
+ 
+     /**
+      * Prints stack trace of the current thread to {@code System.out}.
+      *
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @SuppressWarnings("deprecation")
+     @Deprecated
+     public static void dumpStack() {
+         dumpStack("Dumping stack.");
+     }
+ 
+     /**
+      * Prints stack trace of the current thread to {@code System.out}.
+      *
+      * @param msg Message to print with the stack.
+      *
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @Deprecated
+     public static void dumpStack(String msg) {
+         new Exception(debugPrefix() + msg).printStackTrace(System.out);
+     }
+ 
+     /**
+      * @param log Logger.
+      * @param msg Message.
+      */
+     public static void dumpStack(@Nullable IgniteLogger log, String msg) {
+         U.error(log, "Dumping stack.", new Exception(msg));
+     }
+ 
+     /**
+      * Prints stack trace of the current thread to provided output stream.
+      *
+      * @param msg Message to print with the stack.
+      * @param out Output to dump stack to.
+      *
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @Deprecated
+     public static void dumpStack(String msg, PrintStream out) {
+         new Exception(msg).printStackTrace(out);
+     }
+ 
+     /**
+      * Prints stack trace of the current thread to provided logger.
+      *
+      * @param log Logger.
+      * @param msg Message to print with the stack.
+      *
+      * @deprecated Calls to this method should never be committed to master.
+      */
+     @Deprecated
+     public static void debugStack(IgniteLogger log, String msg) {
+         log.error(msg, new Exception(debugPrefix() + msg));
+     }
+ 
+     /**
+      * @return Common prefix for debug messages.
+      */
+     private static String debugPrefix() {
+         return '<' + DEBUG_DATE_FMT.format(new Date(System.currentTimeMillis())) + "><DEBUG><" +
+             Thread.currentThread().getName() + '>' + ' ';
+     }
+ 
+     /**
+      * Prints heap usage.
+      */
+     public static void debugHeapUsage() {
+         System.gc();
+ 
+         Runtime runtime = Runtime.getRuntime();
+ 
+         X.println('<' + DEBUG_DATE_FMT.format(new Date(System.currentTimeMillis())) + "><DEBUG><" +
+             Thread.currentThread().getName() + "> Heap stats [free=" + runtime.freeMemory() / (1024 * 1024) +
+             "M, total=" + runtime.totalMemory() / (1024 * 1024) + "M]");
+     }
+ 
+     /**
+      * Gets heap size in GB rounded to specified precision.
+      *
+      * @param node Node.
+      * @param precision Precision.
+      * @return Heap size in GB.
+      */
+     public static double heapSize(ClusterNode node, int precision) {
+         return heapSize(Collections.singleton(node), precision);
+     }
+ 
+     /**
+      * Gets total heap size in GB rounded to specified precision.
+      *
+      * @param nodes Nodes.
+      * @param precision Precision.
+      * @return Total heap size in GB.
+      */
+     public static double heapSize(Iterable<ClusterNode> nodes, int precision) {
+         // In bytes.
+         double heap = 0.0;
+ 
+         for (ClusterNode n : nodesPerJvm(nodes)) {
+             ClusterMetrics m = n.metrics();
+ 
+             heap += Math.max(m.getHeapMemoryInitialized(), m.getHeapMemoryMaximum());
+         }
+ 
+         return roundedHeapSize(heap, precision);
+     }
+ 
+     /**
+      * Returns one representative node for each JVM.
+      *
+      * @param nodes Nodes.
+      * @return Collection which contains only one representative node for each JVM.
+      */
+     private static Iterable<ClusterNode> nodesPerJvm(Iterable<ClusterNode> nodes) {
+         Map<String, ClusterNode> grpMap = new HashMap<>();
+ 
+         // Group by mac addresses and pid.
+         for (ClusterNode node : nodes) {
+             String grpId = node.attribute(ATTR_MACS) + "|" + node.attribute(ATTR_JVM_PID);
+ 
+             if (!grpMap.containsKey(grpId))
+                 grpMap.put(grpId, node);
+         }
+ 
+         return grpMap.values();
+     }
+ 
+     /**
+      * Returns current JVM maxMemory in the same format as {@link #heapSize(org.apache.ignite.cluster.ClusterNode, int)}.
+      *
+      * @param precision Precision.
+      * @return Maximum memory size in GB.
+      */
+     public static double heapSize(int precision) {
+         return roundedHeapSize(Runtime.getRuntime().maxMemory(), precision);
+     }
+ 
+     /**
+      * Rounded heap size in gigabytes.
+      *
+      * @param heap Heap.
+      * @param precision Precision.
+      * @return Rounded heap size.
+      */
+     private static double roundedHeapSize(double heap, int precision) {
+         double rounded = new BigDecimal(heap / (1024 * 1024 * 1024d)).round(new MathContext(precision)).doubleValue();
+ 
+         return rounded < 0.1 ? 0.1 : rounded;
+     }
+ 
+     /**
+      * Performs thread dump and prints all available info to the given log.
+      *
+      * @param log Logger.
+      */
+     public static void dumpThreads(@Nullable IgniteLogger log) {
+         ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();
+ 
+         ThreadInfo[] threadInfos =
+             mxBean.dumpAllThreads(mxBean.isObjectMonitorUsageSupported(), mxBean.isSynchronizerUsageSupported());
+ 
+         GridStringBuilder sb = new GridStringBuilder("Thread dump at ")
+             .a(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss z").format(new Date(U.currentTimeMillis()))).a(NL);
+ 
+         for (ThreadInfo info : threadInfos) {
+             printThreadInfo(info, sb);
+ 
+             sb.a(NL);
+ 
+             if (info.getLockedSynchronizers() != null && info.getLockedSynchronizers().length > 0) {
+                 printSynchronizersInfo(info.getLockedSynchronizers(), sb);
+ 
+                 sb.a(NL);
+             }
+         }
+ 
+         sb.a(NL);
+ 
+         warn(log, sb.toString());
+     }
+ 
+     /**
+      * Prints single thread info to a buffer.
+      *
+      * @param threadInfo Thread info.
+      * @param sb Buffer.
+      */
+     private static void printThreadInfo(ThreadInfo threadInfo, GridStringBuilder sb) {
+         sb.a("Thread [name=\"").a(threadInfo.getThreadName())
+             .a("\", id=").a(threadInfo.getThreadId())
+             .a(", state=").a(threadInfo.getThreadState())
+             .a(", blockCnt=").a(threadInfo.getBlockedCount())
+             .a(", waitCnt=").a(threadInfo.getWaitedCount()).a("]").a(NL);
+ 
+         LockInfo lockInfo = threadInfo.getLockInfo();
+ 
+         if (lockInfo != null) {
+             sb.a("    Lock [object=").a(lockInfo)
+                 .a(", ownerName=").a(threadInfo.getLockOwnerName())
+                 .a(", ownerId=").a(threadInfo.getLockOwnerId()).a("]").a(NL);
+         }
+ 
+         MonitorInfo[] monitors = threadInfo.getLockedMonitors();
+         StackTraceElement[] elements = threadInfo.getStackTrace();
+ 
+         for (int i = 0; i < elements.length; i++) {
+             StackTraceElement e = elements[i];
+ 
+             sb.a("        at ").a(e.toString());
+ 
+             for (MonitorInfo monitor : monitors) {
+                 if (monitor.getLockedStackDepth() == i)
+                     sb.a(NL).a("        - locked ").a(monitor);
+             }
+ 
+             sb.a(NL);
+         }
+     }
+ 
+     /**
+      * Prints Synchronizers info to a buffer.
+      *
+      * @param syncs Synchronizers info.
+      * @param sb Buffer.
+      */
+     private static void printSynchronizersInfo(LockInfo[] syncs, GridStringBuilder sb) {
+         sb.a("    Locked synchronizers:");
+ 
+         for (LockInfo info : syncs)
+             sb.a(NL).a("        ").a(info);
+     }
+ 
+     /**
+      * Gets empty constructor for class even if the class does not have empty constructor
+      * declared. This method is guaranteed to work with SUN JDK and other JDKs still need
+      * to be tested.
+      *
+      * @param cls Class to get empty constructor for.
+      * @return Empty constructor if one could be found or {@code null} otherwise.
+      * @throws IgniteCheckedException If failed.
+      */
+     @Nullable public static Constructor<?> forceEmptyConstructor(Class<?> cls) throws IgniteCheckedException {
+         Constructor<?> ctor = null;
+ 
+         try {
+             return cls.getDeclaredConstructor();
+         }
+         catch (Exception ignore) {
+             Method ctorFac = U.ctorFactory();
+             Object sunRefFac = U.sunReflectionFactory();
+ 
+             if (ctorFac != null && sunRefFac != null)
+                 try {
+                     ctor = (Constructor)ctorFac.invoke(sunRefFac, cls, U.objectConstructor());
+                 }
+                 catch (IllegalAccessException | InvocationTargetException e) {
+                     throw new IgniteCheckedException("Failed to get object constructor for class: " + cls, e);
+                 }
+         }
+ 
+         return ctor;
+     }
+ 
+     /**
+      * Creates new instance of a class only if it has an empty constructor (can be non-public).
+      *
+      * @param cls Class name.
+      * @return Instance.
+      * @throws IgniteCheckedException If failed.
+      */
+     @Nullable public static <T> T newInstance(String cls) throws IgniteCheckedException {
+         Class<?> cls0;
+ 
+         try {
+             cls0 = Class.forName(cls);
+         }
+         catch (Exception e) {
+             throw new IgniteCheckedException(e);
+         }
+ 
+         return (T)newInstance(cls0);
+     }
+ 
+     /**
+      * Creates new instance of a class only if it has an empty constructor (can be non-public).
+      *
+      * @param cls Class to instantiate.
+      * @return New instance of the class or {@code null} if empty constructor could not be assigned.
+      * @throws IgniteCheckedException If failed.
+      */
+     @Nullable public static <T> T newInstance(Class<T> cls) throws IgniteCheckedException {
+         boolean set = false;
+ 
+         Constructor<T> ctor = null;
+ 
+         try {
+             ctor = cls.getDeclaredConstructor();
+ 
+             if (ctor == null)
+                 return null;
+ 
+             if (!ctor.isAccessible()) {
+                 ctor.setAccessible(true);
+ 
+                 set = true;
+             }
+ 
+             return ctor.newInstance();
+         }
+         catch (NoSuchMethodException e) {
+             throw new IgniteCheckedException("Failed to find empty constructor for class: " + cls, e);
+         }
+         catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+             throw new IgniteCheckedException("Failed to create new instance for class: " + cls, e);
+         } finally {
+             if (ctor != null && set)
+                 ctor.setAccessible(false);
+         }
+     }
+ 
+     /**
+      * Creates new instance of a class even if it does not have public constructor.
+      *
+      * @param cls Class to instantiate.
+      * @return New instance of the class or {@code null} if empty constructor could not be assigned.
+      * @throws IgniteCheckedException If failed.
+      */
+     @SuppressWarnings({"unchecked"})
+     @Nullable public static <T> T forceNewInstance(Class<?> cls) throws IgniteCheckedException {
+         Constructor ctor = forceEmptyConstructor(cls);
+ 
+         if (ctor == null)
+             return null;
+ 
+         boolean set = false;
+ 
+         try {
+ 
+             if (!ctor.isAccessible()) {
+                 ctor.setAccessible(true);
+ 
+                 set = true;
+             }
+ 
+             return (T)ctor.newInstance();
+         }
+         catch (InstantiationException | InvocationTargetException | IllegalAccessException e) {
+             throw new IgniteCheckedException("Failed to create new instance for class: " + cls, e);
+         } finally {
+             if (set)
+                 ctor.setAccessible(false);
+         }
+     }
+ 
+     /**
+      * Pretty-formatting for minutes.
+      *
+      * @param mins Minutes to format.
+      * @return Formatted presentation of minutes.
+      */
+     public static String formatMins(long mins) {
+         assert mins >= 0;
+ 
+         if (mins == 0)
+             return "< 1 min";
+ 
+         SB sb = new SB();
+ 
+         long dd = mins / 1440; // 1440 mins = 60 mins * 24 hours
+ 
+         if (dd > 0)
+             sb.a(dd).a(dd == 1 ? " day " : " days ");
+ 
+         mins %= 1440;
+ 
+         long hh = mins / 60;
+ 
+         if (hh > 0)
+             sb.a(hh).a(hh == 1 ? " hour " : " hours ");
+ 
+         mins %= 60;
+ 
+         if (mins > 0)
+             sb.a(mins).a(mins == 1 ? " min " : " mins ");
+ 
+         return sb.toString().trim();
+     }
+ 
+     /**
+      * Gets 8-character substring of UUID (for terse logging).
+      *
+      * @param id Input ID.
+      * @return 8-character ID substring.
+      */
+     public static String id8(UUID id) {
+         return id.toString().substring(0, 8);
+     }
+ 
+     /**
+      * Gets 8-character substring of {@link org.apache.ignite.lang.IgniteUuid} (for terse logging).
+      * The ID8 will be constructed as follows:
+      * <ul>
+      * <li>Take first 4 digits for global ID, i.e. {@code GridUuid.globalId()}.</li>
+      * <li>Take last 4 digits for local ID, i.e. {@code GridUuid.localId()}.</li>
+      * </ul>
+      *
+      * @param id Input ID.
+      * @return 8-character representation of {@code GridUuid}.
+      */
+     public static String id8(IgniteUuid id) {
+         String s = id.toString();
+ 
+         return s.substring(0, 4) + s.substring(s.length() - 4);
+     }
+ 
+     /**
+      *
+      * @param len Number of characters to fill in.
+      * @param ch Character to fill with.
+      * @return String.
+      */
+     public static String filler(int len, char ch) {
+         char[] a = new char[len];
+ 
+         Arrays.fill(a, ch);
+ 
+         return new String(a);
+     }
+ 
+     /**
+      * Writes array to output stream.
+      *
+      * @param out Output stream.
+      * @param arr Array to write.
+      * @param <T> Array type.
+      * @throws IOException If failed.
+      */
+     public static <T> void writeArray(ObjectOutput out, T[] arr) throws IOException {
+         int len = arr == null ? 0 : arr.length;
+ 
+         out.writeInt(len);
+ 
+         if (arr != null && arr.length > 0)
+             for (T t : arr)
+                 out.writeObject(t);
+     }
+ 
+     /**
+      * Reads array from input stream.
+      *
+      * @param in Input stream.
+      * @return Deserialized array.
+      * @throws IOException If failed.
+      * @throws ClassNotFoundException If class not found.
+      */
+     @Nullable public static Object[] readArray(ObjectInput in) throws IOException, ClassNotFoundException {
+         int len = in.readInt();
+ 
+         Object[] arr = null;
+ 
+         if (len > 0) {
+             arr = new Object[len];
+ 
+             for (int i = 0; i < len; i++)
+                 arr[i] = in.readObject();
+         }
+ 
+         return arr;
+     }
+ 
+     /**
+      * Reads array from input stream.
+      *
+      * @param in Input stream.
+      * @return Deserialized array.
+      * @throws IOException If failed.
+      * @throws ClassNotFoundException If class not found.
+      */
+     @Nullable public static Class<?>[] readClassArray(ObjectInput in) throws IOException, ClassNotFoundException {
+         int len = in.readInt();
+ 
+         Class<?>[] arr = null;
+ 
+         if (len > 0) {
+             arr = new Class<?>[len];
+ 
+             for (int i = 0; i < len; i++)
+                 arr[i] = (Class<?>)in.readObject();
+         }
+ 
+         return arr;
+     }
+ 
+     /**
+      * Reads array from input stream.
+      *
+      * @param in Input stream.
+      * @return Deserialized array.
+      * @throws IOException If failed.
+      * @throws ClassNotFoundException If class not found.
+      */
+     @SuppressWarnings("unchecked")
+     @Nullable public static <K, V> IgnitePredicate<CacheEntry<K, V>>[] readEntryFilterArray(ObjectInput in)
+         throws IOException, ClassNotFoundException {
+         int len = in.readInt();
+ 
+         IgnitePredicate<CacheEntry<K, V>>[] arr = null;
+ 
+         if (len > 0) {
+             arr = new IgnitePredicate[len];
+ 
+             for (int i = 0; i < len; i++)
+                 arr[i] = (IgnitePredicate<CacheEntry<K, V>>)in.readObject();
+         }
+ 
+         return arr;
+     }
+ 
+     /**
+      *
+      * @param out Output.
+      * @param col Set to write.
+      * @throws IOException If write failed.
+      */
+     public static void writeCollection(ObjectOutput out, Collection<?> col) throws IOException {
+         if (col != null) {
+             out.writeInt(col.size());
+ 
+             for (Object o : col)
+                 out.writeObject(o);
+         }
+         else
+             out.writeInt(-1);
+     }
+ 
+     /**
+      * Writes collection of byte arrays to data output.
+      *
+      * @param out Output to write to.
+      * @param bytes Collection with byte arrays.
+      * @throws IOException If write failed.
+      */
+     public static void writeBytesCollection(DataOutput out, Collection<byte[]> bytes) throws IOException {
+         if (bytes != null) {
+             out.writeInt(bytes.size());
+ 
+             for (byte[] b : bytes)
+                 writeByteArray(out, b);
+         }
+         else
+             out.writeInt(-1);
+     }
+ 
+     /**
+      * Reads collection of byte arrays from data input.
+      *
+      * @param in Data input to read from.
+      * @return List of byte arrays.
+      * @throws IOException If read failed.
+      */
+     public static List<byte[]> readBytesList(DataInput in) throws IOException {
+         int size = in.readInt();
+ 
+         if (size < 0)
+             return null;
+ 
+         List<byte[]> res = new ArrayList<>(size);
+ 
+         for (int i = 0; i < size; i++)
+             res.add(readByteArray(in));
+ 
+         return res;
+     }
+ 
+     /**
+      *
+      * @param out Output.
+      * @param col Set to write.
+      * @throws IOException If write failed.
+      */
+     public static void writeIntCollection(DataOutput out, Collection<Integer> col) throws IOException {
+         if (col != null) {
+             out.writeInt(col.size());
+ 
+             for (Integer i : col)
+                 out.writeInt(i);
+         }
+         else
+             out.writeInt(-1);
+     }
+ 
+     /**
+      * @param in Input.
+      * @return Deserialized set.
+      * @throws IOException If deserialization failed.
+      * @throws ClassNotFoundException If deserialized class could not be found.
+      */
+     @Nullable public static <E> Collection<E> readCollection(ObjectInput in)
+         throws IOException, ClassNotFoundException {
+         return readList(in);
+     }
+ 
+     /**
+      * @param in Input.
+      * @return Deserialized set.
+      * @throws IOException If deserialization failed.
+      */
+     @Nullable public static Collection<Integer> readIntCollection(DataInput in) throws IOException {
+         int size = in.readInt();
+ 
+         // Check null flag.
+         if (size == -1)
+             return null;
+ 
+         Collection<Integer> col = new ArrayList<>(size);
+ 
+         for (int i = 0; i < size; i++)
+             col.add(in.readInt());
+ 
+         return col;
+     }
+ 
+     /**
+      *
+      * @param m Map to copy.
+      * @param <K> Key type.
+      * @param <V> Value type
+      * @return Copied map.
+      */
+     public static <K, V> Map<K, V> copyMap(Map<K, V> m) {
+         return new HashMap<>(m);
+     }
+ 
+     /**
+      *
+      * @param m Map to seal.
+      * @param <K> Key type.
+      * @param <V> Value type
+      * @return Sealed map.
+      */
+     public static <K, V> Map<K, V> sealMap(Map<K, V> m) {
+         assert m != null;
+ 
+         return Collections.unmodifiableMap(new HashMap<>(m));
+     }
+ 
+     /**
+      * Seal collection.
+      *
+      * @param c Collection to seal.
+      * @param <E> Entry type
+      * @return Sealed collection.
+      */
+     public static <E> List<E> sealList(Collection<E> c) {
+         return Collections.unmodifiableList(new ArrayList<>(c));
+     }
+ 
+     /**
+      * Convert array to seal list.
+      *
+      * @param a Array for convert to seal list.
+      * @param <E> Entry type
+      * @return Sealed collection.
+      */
+     public static <E> List<E> sealList(E... a) {
+         return Collections.unmodifiableList(Arrays.asList(a));
+     }
+ 
+     /**
+      * Gets display name of the network interface this IP address belongs to.
+      *
+      * @param addr IP address for which to find network interface name.
+      * @return Network interface name or {@code null} if can't be found.
+      */
+     @Nullable public static String getNetworkInterfaceName(String addr) {
+         assert addr != null;
+ 
+         try {
+             InetAddress inetAddr = InetAddress.getByName(addr);
+ 
+             for (NetworkInterface itf : asIterable(NetworkInterface.getNetworkInterfaces()))
+                 for (InetAddress itfAddr : asIterable(itf.getInetAddresses()))
+                     if (itfAddr.equals(inetAddr))
+                         return itf.getDisplayName();
+         }
+         catch (UnknownHostException ignore) {
+             return null;
+         }
+         catch (SocketException ignore) {
+             return null;
+         }
+ 
+         return null;
+     }
+ 
+     /**
+      * Tries to resolve host by name, returning local host if input is empty.
+      * This method reflects how {@link org.apache.ignite.configuration.IgniteConfiguration#getLocalHost()} should
+      * be handled in most places.
+      *
+      * @param hostName Hostname or {@code null} if local host should be returned.
+      * @return Address of given host or of localhost.
+      * @throws IOException If attempt to get local host failed.
+      */
+     public static InetAddress resolveLocalHost(@Nullable String hostName) throws IOException {
+         return F.isEmpty(hostName) ?
+             // Should default to InetAddress#anyLocalAddress which is package-private.
+             new InetSocketAddress(0).getAddress() :
+             InetAddress.getByName(hostName);
+     }
+ 
+     /**
+      * Determines whether current local host is different from previously cached.
+      *
+      * @return {@code true} or {@code false} depending on whether or not local host
+      *      has changed from the cached value.
+      * @throws IOException If attempt to get local host failed.
+      */
+     public static synchronized boolean isLocalHostChanged() throws IOException {
+         InetAddress locHost0 = locHost;
+ 
+         return locHost0 != null && !resetLocalHost().equals(locHost0);
+     }
+ 
+     /**
+      * Returns host names consistent with {@link #resolveLocalHost(String)}. So when it returns
+      * a common address this method returns single host name, and when a wildcard address passed
+      * this method tries to collect addresses of all available interfaces.
+      *
+      * @param locAddr Local address to resolve.
+      * @return Resolved available addresses of given local address.
+      * @throws IOException If failed.
+      * @throws IgniteCheckedException If no network interfaces found.
+      */
+     public static IgniteBiTuple<Collection<String>, Collection<String>> resolveLocalAddresses(InetAddress locAddr)
+         throws IOException, IgniteCheckedException {
+         assert locAddr != null;
+ 
+         Collection<String> addrs = new ArrayList<>();
+         Collection<String> hostNames = new ArrayList<>();
+ 
+         if (locAddr.isAnyLocalAddress()) {
+             // It should not take longer than 2 seconds to reach
+             // local address on any network.
+             int reachTimeout = 2000;
+ 
+             for (NetworkInterface itf : asIterable(NetworkInterface.getNetworkInterfaces())) {
+                 for (InetAddress addr : asIterable(itf.getInetAddresses())) {
+                     if (!addr.isLinkLocalAddress() && reachable(itf, addr, reachTimeout))
+                         addresses(addr, addrs, hostNames);
+                 }
+             }
+ 
+             if (F.isEmpty(addrs))
+                 throw new IgniteCheckedException("No network addresses found (is networking enabled?).");
+         }
+         else
+             addresses(locAddr, addrs, hostNames);
+ 
+         return F.t(addrs, hostNames);
+     }
+ 
+     /**
+      * @param addr Address.
+      * @param addrs Addresses.
+      * @param hostNames Host names.
+      */
+     private static void addresses(InetAddress addr, Collection<String> addrs, Collection<String> hostNames) {
+         String hostName = addr.getHostName();
+ 
+         String ipAddr = addr.getHostAddress();
+ 
+         hostName = F.isEmpty(hostName) || hostName.equals(ipAddr) || addr.isLoopbackAddress() ? "" : hostName;
+ 
+         addrs.add(ipAddr);
+         hostNames.add(hostName);
+     }
+ 
+     /**
+      * Gets local host. Implementation will first attempt to get a non-loopback
+      * address. If that fails, then loopback address will be returned.
+      * <p>
+      * Note that this method is synchronized to make sure that local host
+      * initialization happens only once.
+      *
+      * @return Address representing local host.
+      * @throws IOException If attempt to get local host failed.
+      */
+     public static synchronized InetAddress getLocalHost() throws IOException {
+         if (locHost == null)
+             // Cache it.
+             resetLocalHost();
+ 
+         return locHost;
+     }
+ 
+     /**
+      * @return Local host.
+      * @throws IOException If attempt to get local host failed.
+      */
+     private static synchronized InetAddress resetLocalHost() throws IOException {
+         locHost = null;
+ 
 -        String sysLocHost = IgniteSystemProperties.getString(GG_LOCAL_HOST);
++        String sysLocHost = IgniteSystemProperties.getString(IGNITE_LOCAL_HOST);
+ 
+         if (sysLocHost != null)
+             sysLocHost = sysLocHost.trim();
+ 
+         if (!F.isEmpty(sysLocHost))
+             locHost = InetAddress.getByName(sysLocHost);
+         else {
+             List<NetworkInterface> itfs = new ArrayList<>();
+ 
+             for (NetworkInterface itf : asIterable(NetworkInterface.getNetworkInterfaces()))
+                 itfs.add(itf);
+ 
+             Collections.sort(itfs, new Comparator<NetworkInterface>() {
+                 @Override public int compare(NetworkInterface itf1, NetworkInterface itf2) {
+                     // Interfaces whose name starts with 'e' should go first.
+                     return itf1.getName().compareTo(itf2.getName());
+                 }
+             });
+ 
+             // It should not take longer than 2 seconds to reach
+             // local address on any network.
+             int reachTimeout = 2000;
+ 
+             for (NetworkInterface itf : itfs) {
+                 boolean found = false;
+ 
+                 for (InetAddress addr : asIterable(itf.getInetAddresses())) {
+                     if (!addr.isLoopbackAddress() && !addr.isLinkLocalAddress() && reachable(itf, addr, reachTimeout)) {
+                         locHost = addr;
+ 
+                         found = true;
+ 
+                         break;
+                     }
+                 }
+ 
+                 if (found)
+                     break;
+             }
+         }
+ 
+         if (locHost == null)
+             locHost = InetAddress.getLocalHost();
+ 
+         return locHost;
+     }
+ 
+     /**
+      * Checks if address can be reached using three argument InetAddress.isReachable() version.
+      *
+      * @param itf Network interface to use for test.
+      * @param addr Address to check.
+      * @param reachTimeout Timeout for the check.
+      * @return {@code True} if address is reachable.
+      */
+     public static boolean reachable(NetworkInterface itf, InetAddress addr, int reachTimeout) {
+         try {
+             return addr.isReachable(itf, 0, reachTimeout);
+         }
+         catch (IOException ignore) {
+             return false;
+         }
+     }
+ 
+     /**
+      * Checks if address can be reached using one argument InetAddress.isReachable() version.
+      *
+      * @param addr Address to check.
+      * @param reachTimeout Timeout for the check.
+      * @return {@code True} if address is reachable.
+      */
+     public static boolean reachable(InetAddress addr, int reachTimeout) {
+         try {
+             return addr.isReachable(reachTimeout);
+         }
+         catch (IOException ignore) {
+             return false;
+         }
+     }
+ 
+     /**
+      * @param loc Local node.
+      * @param rmt Remote node.
+      * @return Whether given nodes have the same macs.
+      */
+     public static boolean sameMacs(ClusterNode loc, ClusterNode rmt) {
+         assert loc != null;
+         assert rmt != null;
+ 
+         String locMacs = loc.attribute(GridNodeAttributes.ATTR_MACS);
+         String rmtMacs = rmt.attribute(GridNodeAttributes.ATTR_MACS);
+ 
+         return locMacs != null && locMacs.equals(rmtMacs);
+     }
+ 
+     /**
+      * Gets a list of all local non-loopback IPs known to this JVM.
+      * Note that this will include both IPv4 and IPv6 addresses (even if one "resolves"
+      * into another). Loopbacks will be skipped.
+      *
+      * @return List of all known local IPs (empty list if no addresses available).
+      */
+     public static synchronized Collection<String> allLocalIps() {
+         List<String> ips = new ArrayList<>(4);
+ 
+         try {
+             Enumeration<NetworkInterface> itfs = NetworkInterface.getNetworkInterfaces();
+ 
+             if (itfs != null) {
+                 for (NetworkInterface itf : asIterable(itfs)) {
+                     if (!itf.isLoopback()) {
+                         Enumeration<InetAddress> addrs = itf.getInetAddresses();
+ 
+                         if (addrs != null) {
+                             for (InetAddress addr : asIterable(addrs)) {
+                                 String hostAddr = addr.getHostAddress();
+ 
+                                 if (!addr.isLoopbackAddress() && !ips.contains(hostAddr))
+                                     ips.add(hostAddr);
+                             }
+                         }
+                     }
+                 }
+             }
+         }
+         catch (SocketException ignore) {
+             return Collections.emptyList();
+         }
+ 
+         Collections.sort(ips);
+ 
+         return ips;
+     }
+ 
+     /**
+      * Gets a list of all local enabled MACs known to this JVM. It
+      * is using hardware address of the network interface that is not guaranteed to be
+      * MAC addresses (but in most cases it is).
+      * <p>
+      * Note that if network interface is disabled - its MAC won't be included. All
+      * local network interfaces are probed including loopbacks. Virtual interfaces
+      * (sub-interfaces) are skipped.
+      * <p>
+      * Note that on linux getHardwareAddress() can return null from time to time
+      * if NetworkInterface.getHardwareAddress() method is called from many threads.
+      *
+      * @return List of all known enabled local MACs or empty list
+      *      if no MACs could be found.
+      */
+     public static synchronized Collection<String> allLocalMACs() {
+         List<String> macs = new ArrayList<>(3);
+ 
+         try {
+             Enumeration<NetworkInterface> itfs = NetworkInterface.getNetworkInterfaces();
+ 
+             if (itfs != null) {
+                 for (NetworkInterface itf : asIterable(itfs)) {
+                     byte[] hwAddr = itf.getHardwareAddress();
+ 
+                     // Loopback produces empty MAC.
+                     if (hwAddr != null && hwAddr.length > 0) {
+                         String mac = byteArray2HexString(hwAddr);
+ 
+                         if (!macs.contains(mac))
+                             macs.add(mac);
+                     }
+                 }
+             }
+         }
+         catch (SocketException ignore) {
+             return Collections.emptyList();
+         }
+ 
+         Collections.sort(macs);
+ 
+         return macs;
+     }
+ 
+     /**
+      * Downloads resource by URL.
+      *
+      * @param url URL to download.
+      * @param file File where downloaded resource should be stored.
+      * @return File where downloaded resource should be stored.
+      * @throws IOException If error occurred.
+      */
+     public static File downloadUrl(URL url, File file) throws IOException {
+         assert url != null;
+         assert file != null;
+ 
+         InputStream in = null;
+         OutputStream out = null;
+ 
+         try {
+             URLConnection conn = url.openConnection();
+ 
+             if (conn instanceof HttpsURLConnection) {
+                 HttpsURLConnection https = (HttpsURLConnection)conn;
+ 
+                 https.setHostnameVerifier(new DeploymentHostnameVerifier());
+ 
+                 SSLContext ctx = SSLContext.getInstance(HTTPS_PROTOCOL);
+ 
+                 ctx.init(null, getTrustManagers(), null);
+ 
+                 // Initialize socket factory.
+                 https.setSSLSocketFactory(ctx.getSocketFactory());
+             }
+ 
+             in = conn.getInputStream();
+ 
+             if (in == null)
+                 throw new IOException("Failed to open connection: " + url.toString());
+ 
+             out = new BufferedOutputStream(new FileOutputStream(file));
+ 
+             copy(in, out);
+         }
+         catch (NoSuchAlgorithmException | KeyManagementException e) {
+             throw new IOException("Failed to open HTTPs connection [url=" + url.toString() + ", msg=" + e + ']', e);
+         } finally {
+             close(in, null);
+             close(out, null);
+         }
+ 
+         return file;
+     }
+ 
+     /**
+      * Construct array with one trust manager which don't reject input certificates.
+      *
+      * @return Array with one X509TrustManager implementation of trust manager.
+      */
+     private static TrustManager[] getTrustManagers() {
+         return new TrustManager[]{
+             new X509TrustManager() {
+                 @Nullable @Override public X509Certificate[] getAcceptedIssuers() {
+                     return null;
+                 }
+ 
+                 @Override public void checkClientTrusted(X509Certificate[] certs, String authType) {
+                     /* No-op. */
+                 }
+ 
+                 @Override public void checkServerTrusted(X509Certificate[] certs, String authType) {
+                     /* No-op. */
+                 }
+             }
+         };
+     }
+ 
+     /**
+      * Replace password in URI string with a single '*' character.
+      * <p>
+      * Parses given URI by applying &quot;.*://(.*:.*)@.*&quot;
+      * regular expression pattern and than if URI matches it
+      * replaces password strings between '/' and '@' with '*'.
+      *
+      * @param uri URI which password should be replaced.
+      * @return Converted URI string
+      */
+     @Nullable public static String hidePassword(@Nullable String uri) {
+         if (uri == null)
+             return null;
+ 
+         if (Pattern.matches(".*://(.*:.*)@.*", uri)) {
+             int userInfoLastIdx = uri.indexOf('@');
+ 
+             assert userInfoLastIdx != -1;
+ 
+             String str = uri.substring(0, userInfoLastIdx);
+ 
+             int userInfoStartIdx = str.lastIndexOf('/');
+ 
+             str = str.substring(userInfoStartIdx + 1);
+ 
+             String[] params = str.split(";");
+ 
+             StringBuilder builder = new StringBuilder();
+ 
+             for (int i = 0; i < params.length; i++) {
+                 int idx;
+ 
+                 if ((idx = params[i].indexOf(':')) != -1)
+                     params[i] = params[i].substring(0, idx + 1) + '*';
+ 
+                 builder.append(params[i]);
+ 
+                 if (i != params.length - 1)
+                     builder.append(';');
+             }
+ 
+             return new StringBuilder(uri).replace(userInfoStartIdx + 1, userInfoLastIdx,
+                 builder.toString()).toString();
+         }
+ 
+         return uri;
+     }
+ 
+     /**
+      * @return Class loader used to load GridGain itself.
+      */
+     public static ClassLoader gridClassLoader() {
+         return gridClassLoader;
+     }
+ 
+     /**
+      * @param parent Parent to find.
+      * @param ldr Loader to check.
+      * @return {@code True} if parent found.
+      */
+     public static boolean hasParent(@Nullable ClassLoader parent, ClassLoader ldr) {
+         if (parent != null) {
+             for (; ldr != null; ldr = ldr.getParent()) {
+                 if (ldr.equals(parent))
+                     return true;
+             }
+ 
+             return false;
+         }
+ 
+         return true;
+     }
+ 
+     /**
+      * Verifier always returns successful result for any host.
+      */
+     private static class DeploymentHostnameVerifier implements HostnameVerifier {
+         /** {@inheritDoc} */
+         @Override public boolean verify(String hostname, SSLSession ses) {
+             // Remote host trusted by default.
+             return true;
+         }
+     }
+ 
+     /**
+      * Makes a {@code '+---+'} dash line.
+      *
+      * @param len Length of the dash line to make.
+      * @return Dash line.
+      */
+     public static String dash(int len) {
+         char[] dash = new char[len];
+ 
+         Arrays.fill(dash, '-');
+ 
+         dash[0] = dash[len - 1] = '+';
+ 
+         return new String(dash);
+     }
+ 
+     /**
+      * Creates space filled string of given length.
+      *
+      * @param len Number of spaces.
+      * @return Space filled string of given length.
+      */
+     public static String pad(int len) {
+         char[] dash = new char[len];
+ 
+         Arrays.fill(dash, ' ');
+ 
+         return new String(dash);
+     }
+ 
+     /**
+      * Formats system time in milliseconds for printing in logs.
+      *
+      * @param sysTime System time.
+      * @return Formatted time string.
+      */
+     public static String format(long sysTime) {
+         return LONG_DATE_FMT.format(new java.util.Date(sysTime));
+     }
+ 
+     /**
+      * Takes given collection, shuffles it and returns iterable instance.
+      *
+      * @param <T> Type of elements to create iterator for.
+      * @param col Collection to shuffle.
+      * @return Iterable instance over randomly shuffled collection.
+      */
+     public static <T> Iterable<T> randomIterable(Collection<T> col) {
+         List<T> list = new ArrayList<>(col);
+ 
+         Collections.shuffle(list);
+ 
+         return list;
+     }
+ 
+     /**
+      * Converts enumeration to iterable so it can be used in {@code foreach} construct.
+      *
+      * @param <T> Types of instances for iteration.
+      * @param e Enumeration to convert.
+      * @return Iterable over the given enumeration.
+      */
+     public static <T> Iterable<T> asIterable(final Enumeration<T> e) {
+         return new Iterable<T>() {
+             @Override public Iterator<T> iterator() {
+                 return new Iterator<T>() {
+                     @Override public boolean hasNext() {
+                         return e.hasMoreElements();
+                     }
+ 
+                     @SuppressWarnings({"IteratorNextCanNotThrowNoSuchElementException"})
+                     @Override public T next() {
+                         return e.nextElement();
+                     }
+ 
+                     @Override public void remove() {
+                         throw new UnsupportedOperationException();
+                     }
+                 };
+             }
+         };
+     }
+ 
+     /**
+      * Copy source file (or folder) to destination file (or folder). Supported source & destination:
+      * <ul>
+      * <li>File to File</li>
+      * <li>File to Folder</li>
+      * <li>Folder to Folder (Copy the content of the directory and not the directory itself)</li>
+      * </ul>
+      *
+      * @param src Source file or folder.
+      * @param dest Destination file or folder.
+      * @param overwrite Whether or not overwrite existing files and folders.
+      * @throws IOException Thrown if an I/O error occurs.
+      */
+     public static void copy(File src, File dest, boolean overwrite) throws IOException {
+         assert src != null;
+         assert dest != null;
+ 
+         /*
+          * Supported source & destination:
+          * ===============================
+          * 1. File -> File
+          * 2. File -> Directory
+          * 3. Directory -> Directory
+          */
+ 
+         // Source must exist.
+         if (!src.exists())
+             throw new FileNotFoundException("Source can't be found: " + src);
+ 
+         // Check that source and destination are not the same.
+         if (src.getAbsoluteFile().equals(dest.getAbsoluteFile()))
+             throw new IOException("Source and destination are the same [src=" + src + ", dest=" + dest + ']');
+ 
+         if (dest.exists()) {
+             if (!dest.isDirectory() && !overwrite)
+                 throw new IOException("Destination already exists: " + dest);
+ 
+             if (!dest.canWrite())
+                 throw new IOException("Destination is not writable:" + dest);
+         }
+         else {
+             File parent = dest.getParentFile();
+ 
+             if (parent != null && !parent.exists())
+                 // Ignore any errors here.
+                 // We will get errors when we'll try to open the file stream.
+                 //noinspection ResultOfMethodCallIgnored
+                 parent.mkdirs();
+ 
+             // If source is a directory, we should create destination directory.
+             if (src.isDirectory())
+                 //noinspection ResultOfMethodCallIgnored
+                 dest.mkdir();
+         }
+ 
+         if (src.isDirectory()) {
+             // In this case we have Directory -> Directory.
+             // Note that we copy the content of the directory and not the directory itself.
+ 
+             File[] files = src.listFiles();
+ 
+             for (File file : files) {
+                 if (file.isDirectory()) {
+                     File dir = new File(dest, file.getName());
+ 
+                     if (!dir.exists() && !dir.mkdirs())
+                         throw new IOException("Can't create directory: " + dir);
+ 
+                     copy(file, dir, overwrite);
+                 }
+                 else
+                     copy(file, dest, overwrite);
+             }
+         }
+         else {
+             // In this case we have File -> File or File -> Directory.
+             File file = dest.exists() && dest.isDirectory() ? new File(dest, src.getName()) : dest;
+ 
+             if (!overwrite && file.exists())
+                 throw new IOException("Destination already exists: " + file);
+ 
+             FileInputStream in = null;
+             FileOutputStream out = null;
+ 
+             try {
+                 in = new FileInputStream(src);
+                 out = new FileOutputStream(file);
+ 
+                 copy(in, out);
+             }
+             finally {
+                 if (in != null)
+                     in.close();
+ 
+                 if (out != null) {
+                     out.getFD().sync();
+ 
+                     out.close();
+                 }
+             }
+         }
+     }
+ 
+     /**
+      * Starts clock timer if grid is first.
+      */
+     public static void onGridStart() {
+         synchronized (mux) {
+             if (gridCnt == 0) {
+                 timer = new Thread(new Runnable() {
+                     @SuppressWarnings({"BusyWait", "InfiniteLoopStatement"})
+                     @Override public void run() {
+                         while (true) {
+                             curTimeMillis = System.currentTimeMillis();
+ 
+                             try {
+                                 Thread.sleep(10);
+                             }
+                             catch (InterruptedException ignored) {
+                                 U.log(null, "Timer thread has been interrupted.");
+ 
+                                 break;
+                             }
+                         }
+                     }
+                 }, "gridgain-clock");
+ 
+                 timer.setDaemon(true);
+ 
+                 timer.setPriority(10);
+ 
+                 timer.start();
+             }
+ 
+             ++gridCnt;
+         }
+     }
+ 
+     /**
+      * Stops clock timer if all nodes into JVM were stopped.
+      */
+     public static void onGridStop(){
+         synchronized (mux) {
+             assert gridCnt > 0 : gridCnt;
+ 
+             --gridCnt;
+ 
+             if (gridCnt == 0 && timer != null) {
+                 timer.interrupt();
+ 
+                 timer = null;
+             }
+         }
+     }
+ 
+     /**
+      * Copies input byte stream to output byte stream.
+      *
+      * @param in Input byte stream.
+      * @param out Output byte stream.
+      * @return Number of the copied bytes.
+      * @throws IOException Thrown if an I/O error occurs.
+      */
+     public static int copy(InputStream in, OutputStream out) throws IOException {
+         assert in != null;
+         assert out != null;
+ 
+         byte[] buf = new byte[BUF_SIZE];
+ 
+         int cnt = 0;
+ 
+         for (int n; (n = in.read(buf)) > 0;) {
+             out.write(buf, 0, n);
+ 
+             cnt += n;
+         }
+ 
+         return cnt;
+     }
+ 
+     /**
+      * Copies input character stream to output character stream.
+      *
+      * @param in Input character stream.
+      * @param out Output character stream.
+      * @return Number of the copied characters.
+      * @throws IOException Thrown if an I/O error occurs.
+      */
+     public static int copy(Reader in, Writer out) throws IOException {
+         assert in != null;
+         assert out != null;
+ 
+         char[] buf = new char[BUF_SIZE];
+ 
+         int cnt = 0;
+ 
+         for (int n; (n = in.read(buf)) > 0;) {
+             out.write(buf, 0, n);
+ 
+             cnt += n;
+         }
+ 
+         return cnt;
+     }
+ 
+     /**
+      * Writes string to file.
+      *
+      * @param file File.
+      * @param s String to write.
+      * @throws IOException Thrown if an I/O error occurs.
+      */
+     public static void writeStringToFile(File file, String s) throws IOException {
+         writeStringToFile(file, s, Charset.defaultCharset().toString(), false);
+     }
+ 
+     /**
+      * Writes string to file.
+      *
+      * @param file File.
+      * @param s String to write.
+      * @param charset Encoding.
+      * @throws IOException Thrown if an I/O error occurs.
+      */
+     public static void writeStringToFile(File file, String s, String charset) throws IOException {
+         writeStringToFile(file, s, charset, false);
+     }
+ 
+     /**
+      * Reads file to string using specified charset.
+      *
+      * @param fileName File name.
+      * @param charset File charset.
+      * @return File content.
+      * @throws IOException If error occurred.
+      */
+     public static String readFileToString(String fileName, String charset) throws IOException {
+         Reader input = new InputStreamReader(new FileInputStream(fileName), charset);
+ 
+         StringWriter output = new StringWriter();
+ 
+         char[] buf = new char[4096];
+ 
+         int n;
+ 
+         while ((n = input.read(buf)) != -1)
+             output.write(buf, 0, n);
+ 
+         return output.toString();
+     }
+ 
+     /**
+      * Writes string to file.
+      *
+      * @param file File.
+      * @param s String to write.
+      * @param charset Encoding.
+      * @param append If {@code true}, then specified string will be added to the end of the file.
+      * @throws IOException Thrown if an I/O error occurs.
+      */
+     public static void writeStringToFile(File file, String s, String charset, boolean append) throws IOException {
+         if (s == null)
+             return;
+ 
+         OutputStream out = null;
+ 
+         try {
+             out = new FileOutputStream(file, append);
+ 
+             if (s != null)
+                 out.write(s.getBytes(charset));
+         } finally {
+             closeQuiet(out);
+         }
+     }
+ 
+     /**
+      * Utility method that sets cause into exception and returns it.
+      *
+      * @param e Exception to set cause to and return.
+      * @param cause Optional cause to set (if not {@code null}).
+      * @param <E> Type of the exception.
+      * @return Passed in exception with optionally set cause.
+      */
+     public static <E extends Throwable> E withCause(E e, @Nullable Throwable cause) {
+         assert e != null;
+ 
+         if (cause != null)
+             e.initCause(cause);
+ 
+         return e;
+     }
+ 
+     /**
+      * Deletes file or directory with all sub-directories and files.
+      *
+      * @param file File or directory to delete.
+      * @return {@code true} if and only if the file or directory is successfully deleted,
+      *      {@code false} otherwise
+      */
+     public static boolean delete(File file) {
+         assert file != null;
+ 
+         boolean res = true;
+ 
+         if (file.isDirectory()) {
+             File[] files = file.listFiles();
+ 
+             if (files != null && files.length > 0)
+                 for (File file1 : files)
+                     if (file1.isDirectory())
+                         res &= delete(file1);
+                     else if (file1.getName().endsWith("jar"))
+                         try {
+                             // Why do we do this?
+                             new JarFile(file1, false).close();
+ 
+                             res &= file1.delete();
+                         }
+                         catch (IOException ignore) {
+                             // Ignore it here...
+                         }
+                     else
+                         res &= file1.delete();
+ 
+             res &= file.delete();
+         }
+         else
+             res = file.delete();
+ 
+         return res;
+     }
+ 
+     /**
+      * @param dir Directory to create along with all non-existent parent directories.
+      * @return {@code True} if directory exists (has been created or already existed),
+      *      {@code false} if has not been created and does not exist.
+      */
+     public static boolean mkdirs(File dir) {
+         assert dir != null;
+ 
+         return dir.mkdirs() || dir.exists();
+     }
+ 
+     /**
+      * Resolve project home directory based on source code base.
+      *
+      * @return Project home directory (or {@code null} if it cannot be resolved).
+      */
+     @Nullable private static String resolveProjectHome() {
+         assert Thread.holdsLock(IgniteUtils.class);
+ 
+         // Resolve GridGain home via environment variables.
 -        String ggHome0 = IgniteSystemProperties.getString(GG_HOME);
++        String ggHome0 = IgniteSystemProperties.getString(IGNITE_HOME);
+ 
+         if (!F.isEmpty(ggHome0))
+             return ggHome0;
+ 
+         String appWorkDir = System.getProperty("user.dir");
+ 
+         if (appWorkDir != null) {
+             ggHome0 = findProjectHome(new File(appWorkDir));
+ 
+             if (ggHome0 != null)
+                 return ggHome0;
+         }
+ 
+         URI uri;
+ 
+         Class<IgniteUtils> cls = IgniteUtils.class;
+ 
+         try {
+             ProtectionDomain domain = cls.getProtectionDomain();
+ 
+             // Should not happen, but to make sure our code is not broken.
+             if (domain == null || domain.getCodeSource() == null || domain.getCodeSource().getLocation() == null) {
+                 logResolveFailed(cls, null);
+ 
+                 return null;
+             }
+ 
+             // Resolve path to class-file.
+             uri = domain.getCodeSource().getLocation().toURI();
+ 
+             // Overcome UNC path problem on Windows (http://www.tomergabel.com/JavaMishandlesUNCPathsOnWindows.aspx)
+             if (isWindows() && uri.getAuthority() != null)
+                 uri = new URI(uri.toString().replace("file://", "file:/"));
+         }
+         catch (URISyntaxException | SecurityException e) {
+             logResolveFailed(cls, e);
+ 
+             return null;
+         }
+ 
+         return findProjectHome(new File(uri));
+     }
+ 
+     /**
+      * Tries to find project home starting from specified directory and moving to root.
+      *
+      * @param startDir First directory in search hierarchy.
+      * @return Project home path or {@code null} if it wasn't found.
+      */
+     private static String findProjectHome(File startDir) {
+         for (File cur = startDir.getAbsoluteFile(); cur != null; cur = cur.getParentFile()) {
+             // Check 'cur' is project home directory.
+             if (!new File(cur, "bin").isDirectory() ||
+                 !new File(cur, "libs").isDirectory() ||
+                 !new File(cur, "config").isDirectory())
+                 continue;
+ 
+             return cur.getPath();
+         }
+ 
+         return null;
+     }
+ 
+     /**
+      * @param cls Class.
+      * @param e Exception.
+      */
+     private static void logResolveFailed(Class cls, Exception e) {
 -        warn(null, "Failed to resolve GRIDGAIN_HOME automatically for class codebase " +
++        warn(null, "Failed to resolve IGNITE_HOME automatically for class codebase " +
+             "[class=" + cls + (e == null ? "" : ", e=" + e.getMessage()) + ']');
+     }
+ 
+     /**
 -     * Retrieves {@code GRIDGAIN_HOME} property. The property is retrieved from system
++     * Retrieves {@code IGNITE_HOME} property. The property is retrieved from system
+      * properties or from environment in that order.
+      *
 -     * @return {@code GRIDGAIN_HOME} property.
++     * @return {@code IGNITE_HOME} property.
+      */
+     @Nullable public static String getGridGainHome() {
+         GridTuple<String> ggHomeTup = ggHome;
+ 
+         String ggHome0;
+ 
+         if (ggHomeTup == null) {
+             synchronized (IgniteUtils.class) {
+                 // Double check.
+                 ggHomeTup = ggHome;
+ 
+                 if (ggHomeTup == null) {
+                     // Resolve GridGain installation home directory.
+                     ggHome = F.t(ggHome0 = resolveProjectHome());
+ 
+                     if (ggHome0 != null)
 -                        System.setProperty(GG_HOME, ggHome0);
++                        System.setProperty(IGNITE_HOME, ggHome0);
+                 }
+                 else
+                     ggHome0 = ggHomeTup.get();
+             }
+         }
+         else
+             ggHome0 = ggHomeTup.get();
+ 
+         return ggHome0;
+     }
+ 
+     /**
+      * @param path GridGain home. May be {@code null}.
+      */
+     public static void setGridGainHome(@Nullable String path) {
+         GridTuple<String> ggHomeTup = ggHome;
+ 
+         String ggHome0;
+ 
+         if (ggHomeTup == null) {
+             synchronized (IgniteUtils.class) {
+                 // Double check.
+                 ggHomeTup = ggHome;
+ 
+                 if (ggHomeTup == null) {
+                     if (F.isEmpty(path))
 -                        System.clearProperty(GG_HOME);
++                        System.clearProperty(IGNITE_HOME);
+                     else
 -                        System.setProperty(GG_HOME, path);
++                        System.setProperty(IGNITE_HOME, path);
+ 
+                     ggHome = F.t(path);
+ 
+                     return;
+                 }
+                 else
+                     ggHome0 = ggHomeTup.get();
+             }
+         }
+         else
+             ggHome0 = ggHomeTup.get();
+ 
+         if (ggHome0 != null && !ggHome0.equals(path))
 -            throw new IgniteException("Failed to set GRIDGAIN_HOME after it has been already resolved " +
++            throw new IgniteException("Failed to set IGNITE_HOME after it has been already resolved " +
+                 "[ggHome=" + ggHome0 + ", newGgHome=" + path + ']');
+     }
+ 
+     /**
+      * Gets file associated with path.
+      * <p>
 -     * First check if path is relative to {@code GRIDGAIN_HOME}.
++     * First check if path is relative to {@code IGNITE_HOME}.
+      * If not, check if path is absolute.
+      * If all checks fail, then {@code null} is returned.
+      * <p>
 -     * See {@link #getGridGainHome()} for information on how {@code GRIDGAIN_HOME} is retrieved.
++     * See {@link #getGridGainHome()} for information on how {@code IGNITE_HOME} is retrieved.
+      *
+      * @param path Path to resolve.
+      * @return Resolved path as file, or {@code null} if path cannot be resolved.
+      */
+     @Nullable public static File resolveGridGainPath(String path) {
+         assert path != null;
+ 
+         /*
 -         * 1. Check relative to GRIDGAIN_HOME specified in configuration, if any.
++         * 1. Check relative to IGNITE_HOME specified in configuration, if any.
+          */
+ 
+         String home = getGridGainHome();
+ 
+         if (home != null) {
+             File file = new File(home, path);
+ 
+             if (file.exists())
+                 return file;
+         }
+ 
+         /*
+          * 2. Check given path as absolute.
+          */
+ 
+         File file = new File(path);
+ 
+         if (file.exists())
+             return file;
+ 
+         /*
+          * 3. Check development path.
+          */
+ 
+         if (home != null)
+             file = new File(home, "os/" + path);
+ 
+         return file.exists() ? file : null;
+     }
+ 
+     /**
+      * Gets URL representing the path passed in. First the check is made if path is absolute.
+      * If not, then the check is made if path is relative to {@code META-INF} folder in classpath.
 -     * If not, then the check is made if path is relative to ${GRIDGAIN_HOME}.
++     * If not, then the check is made if path is relative to ${IGNITE_HOME}.
+      * If all checks fail,
+      * then {@code null} is returned, otherwise URL representing path is returned.
+      * <p>
 -     * See {@link #getGridGainHome()} for information on how {@code GRIDGAIN_HOME} is retrieved.
++     * See {@link #getGridGainHome()} for information on how {@code IGNITE_HOME} is retrieved.
+      *
+      * @param path Path to resolve.
+      * @return Resolved path as URL, or {@code null} if path cannot be resolved.
+      * @see #getGridGainHome()
+      */
+     @Nullable public static URL resolveGridGainUrl(String path) {
+         return resolveGridGainUrl(path, true);
+     }
+ 
+     /**
+      * Gets URL representing the path passed in. First the check is made if path is absolute.
+      * If not, then the check is made if path is relative to {@code META-INF} folder in classpath.
 -     * If not, then the check is made if path is relative to ${GRIDGAIN_HOME}.
++     * If not, then the check is made if path is relative to ${IGNITE_HOME}.
+      * If all checks fail,
+      * then {@code null} is returned, otherwise URL representing path is returned.
+      * <p>
 -     * See {@link #getGridGainHome()} for information on how {@code GRIDGAIN_HOME} is retrieved.
++     * See {@link #getGridGainHome()} for information on how {@code IGNITE_HOME} is retrieved.
+      *
+      * @param path Path to resolve.
+      * @param metaInf Flag to indicate whether META-INF folder should be checked or class path root.
+      * @return Resolved path as URL, or {@code null} if path cannot be resolved.
+      * @see #getGridGainHome()
+      */
+     @SuppressWarnings({"UnusedCatchParameter"})
+     @Nullable public static URL resolveGridGainUrl(String path, boolean metaInf) {
+         File f = resolveGridGainPath(path);
+ 
+         if (f == null)
+             f = resolveGridGainPath("os/" + path);
+ 
+         if (f != null) {
+             try {
+                 // Note: we use that method's chain instead of File.getURL() with due
+                 // Sun bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6179468
+                 return f.toURI().toURL();
+             }
+             catch (MalformedURLException e) {
+                 // No-op.
+             }
+         }
+ 
+         String locPath = (metaInf ? "META-INF/" : "") + path.replaceAll("\\\\", "/");
+ 
+         return Thread.currentThread().getContextClassLoader().getResource(locPath);
+     }
+ 
+     /**
+      * Join byte arrays into single one.
+      *
+      * @param bufs list of byte arrays to concatenate.
+      * @return Concatenated byte's array.
+      */
+     public static byte[] join(byte[]... bufs) {
+         int size = 0;
+         for (byte[] buf : bufs) {
+             size += buf.length;
+         }
+ 
+         byte[] res = new byte[size];
+         int position = 0;
+         for (byte[] buf : bufs) {
+             arrayCopy(buf, 0, res, position, buf.length);
+             position += buf.length;
+         }
+ 
+         return res;
+     }
+ 
+     /**
+      * Converts byte array to formatted string. If calling:
+      * <pre name="code" class="java">
+      * ...
+      * byte[] data = {10, 20, 30, 40, 50, 60, 70, 80, 90};
+      *
+      * U.byteArray2String(data, "0x%02X", ",0x%02X")
+      * ...
+      * </pre>
+      * the result will be:
+      * <pre name="code" class="java">
+      * ...
+      * 0x0A, 0x14, 0x1E, 0x28, 0x32, 0x3C, 0x46, 0x50, 0x5A
+      * ...
+      * </pre>
+      *
+      * @param arr Array of byte.
+      * @param hdrFmt C-style string format for the first element.
+      * @param bodyFmt C-style string format for second and following elements, if any.
+      * @return String with converted bytes.
+      */
+     public static String byteArray2String(byte[] arr, String hdrFmt, String bodyFmt) {
+         assert arr != null;
+         assert hdrFmt != null;
+         assert bodyFmt != null;
+ 
+         SB sb = new SB();
+ 
+         sb.a('{');
+ 
+         boolean first = true;
+ 
+         for (byte b : arr)
+             if (first) {
+                 sb.a(String.format(hdrFmt, b));
+ 
+                 first = false;
+             }
+             else
+                 sb.a(String.format(bodyFmt, b));
+ 
+         sb.a('}');
+ 
+         return sb.toString();
+     }
+ 
+     /**
+      * Converts byte array to hex string.
+      *
+      * @param arr Array of bytes.
+      * @return Hex string

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