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From e..@apache.org
Subject [2/3] git commit: ACCUMULO-1903 prefer the cached, reusable ZooReaderWriter over raw Zookeeper API
Date Tue, 19 Nov 2013 15:19:35 GMT
ACCUMULO-1903 prefer the cached, reusable ZooReaderWriter over raw Zookeeper API


Project: http://git-wip-us.apache.org/repos/asf/accumulo/repo
Commit: http://git-wip-us.apache.org/repos/asf/accumulo/commit/bf8c90a0
Tree: http://git-wip-us.apache.org/repos/asf/accumulo/tree/bf8c90a0
Diff: http://git-wip-us.apache.org/repos/asf/accumulo/diff/bf8c90a0

Branch: refs/heads/master
Commit: bf8c90a02b7bef0b53790bccfe3f3bd30434243f
Parents: 404e955 32b6b65
Author: Eric Newton <eric.newton@gmail.com>
Authored: Tue Nov 19 10:18:30 2013 -0500
Committer: Eric Newton <eric.newton@gmail.com>
Committed: Tue Nov 19 10:18:30 2013 -0500

----------------------------------------------------------------------
 .../apache/accumulo/server/monitor/Monitor.java   | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/accumulo/blob/bf8c90a0/server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java
----------------------------------------------------------------------
diff --cc server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java
index 8602c4c,0000000..fc2f98a
mode 100644,000000..100644
--- a/server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java
+++ b/server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java
@@@ -1,667 -1,0 +1,659 @@@
 +/*
 + * 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.accumulo.server.monitor;
 +
 +import java.net.InetSocketAddress;
 +import java.util.ArrayList;
 +import java.util.Collections;
 +import java.util.HashMap;
 +import java.util.HashSet;
 +import java.util.LinkedList;
 +import java.util.List;
 +import java.util.Map;
 +import java.util.Map.Entry;
 +import java.util.Set;
 +
- import org.apache.accumulo.trace.instrument.Tracer;
 +import org.apache.accumulo.core.Constants;
 +import org.apache.accumulo.core.client.Instance;
 +import org.apache.accumulo.core.client.impl.MasterClient;
 +import org.apache.accumulo.core.conf.AccumuloConfiguration;
 +import org.apache.accumulo.core.conf.Property;
 +import org.apache.accumulo.core.file.FileUtil;
 +import org.apache.accumulo.core.gc.thrift.GCMonitorService;
 +import org.apache.accumulo.core.gc.thrift.GCStatus;
 +import org.apache.accumulo.core.master.thrift.Compacting;
 +import org.apache.accumulo.core.master.thrift.MasterClientService;
 +import org.apache.accumulo.core.master.thrift.MasterMonitorInfo;
 +import org.apache.accumulo.core.master.thrift.TableInfo;
 +import org.apache.accumulo.core.master.thrift.TabletServerStatus;
 +import org.apache.accumulo.core.security.SecurityUtil;
 +import org.apache.accumulo.core.util.CachedConfiguration;
 +import org.apache.accumulo.core.util.Daemon;
 +import org.apache.accumulo.core.util.LoggingRunnable;
 +import org.apache.accumulo.core.util.Pair;
 +import org.apache.accumulo.core.util.ServerServices;
 +import org.apache.accumulo.core.util.ServerServices.Service;
 +import org.apache.accumulo.core.util.ThriftUtil;
 +import org.apache.accumulo.core.util.UtilWaitThread;
 +import org.apache.accumulo.core.zookeeper.ZooUtil;
 +import org.apache.accumulo.server.Accumulo;
 +import org.apache.accumulo.server.client.HdfsZooInstance;
 +import org.apache.accumulo.server.conf.ServerConfiguration;
 +import org.apache.accumulo.server.monitor.servlets.DefaultServlet;
 +import org.apache.accumulo.server.monitor.servlets.GcStatusServlet;
 +import org.apache.accumulo.server.monitor.servlets.JSONServlet;
 +import org.apache.accumulo.server.monitor.servlets.LogServlet;
 +import org.apache.accumulo.server.monitor.servlets.MasterServlet;
 +import org.apache.accumulo.server.monitor.servlets.OperationServlet;
 +import org.apache.accumulo.server.monitor.servlets.ProblemServlet;
 +import org.apache.accumulo.server.monitor.servlets.ShellServlet;
 +import org.apache.accumulo.server.monitor.servlets.TServersServlet;
 +import org.apache.accumulo.server.monitor.servlets.TablesServlet;
 +import org.apache.accumulo.server.monitor.servlets.VisServlet;
 +import org.apache.accumulo.server.monitor.servlets.XMLServlet;
 +import org.apache.accumulo.server.monitor.servlets.trace.ListType;
 +import org.apache.accumulo.server.monitor.servlets.trace.ShowTrace;
 +import org.apache.accumulo.server.monitor.servlets.trace.Summary;
 +import org.apache.accumulo.server.problems.ProblemReports;
 +import org.apache.accumulo.server.problems.ProblemType;
 +import org.apache.accumulo.server.security.SecurityConstants;
 +import org.apache.accumulo.server.util.EmbeddedWebServer;
++import org.apache.accumulo.server.zookeeper.ZooReaderWriter;
++import org.apache.accumulo.trace.instrument.Tracer;
 +import org.apache.hadoop.fs.FileSystem;
 +import org.apache.log4j.Logger;
- import org.apache.zookeeper.WatchedEvent;
- import org.apache.zookeeper.Watcher;
- import org.apache.zookeeper.ZooKeeper;
 +
 +/**
 + * Serve master statistics with an embedded web server.
 + */
 +public class Monitor {
 +  private static final Logger log = Logger.getLogger(Monitor.class);
 +  
 +  public static final int REFRESH_TIME = 5;
 +  private static long lastRecalc = 0L;
 +  private static double totalIngestRate = 0.0;
 +  private static double totalIngestByteRate = 0.0;
 +  private static double totalQueryRate = 0.0;
 +  private static double totalScanRate = 0.0;
 +  private static double totalQueryByteRate = 0.0;
 +  private static long totalEntries = 0L;
 +  private static int totalTabletCount = 0;
 +  private static int onlineTabletCount = 0;
 +  private static long totalHoldTime = 0;
 +  private static long totalLookups = 0;
 +  private static int totalTables = 0;
 +  
 +  private static class MaxList<T> extends LinkedList<Pair<Long,T>> {
 +    private static final long serialVersionUID = 1L;
 +    
 +    private long maxDelta;
 +    
 +    public MaxList(long maxDelta) {
 +      this.maxDelta = maxDelta;
 +    }
 +    
 +    @Override
 +    public boolean add(Pair<Long,T> obj) {
 +      boolean result = super.add(obj);
 +      
 +      if (obj.getFirst() - get(0).getFirst() > maxDelta)
 +        remove(0);
 +      
 +      return result;
 +    }
 +    
 +  }
 +  
 +  private static final int MAX_TIME_PERIOD = 60 * 60 * 1000;
 +  private static final List<Pair<Long,Double>> loadOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Double>> ingestRateOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Double>> ingestByteRateOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Integer>> recoveriesOverTime = Collections.synchronizedList(new
MaxList<Integer>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Integer>> minorCompactionsOverTime = Collections.synchronizedList(new
MaxList<Integer>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Integer>> majorCompactionsOverTime = Collections.synchronizedList(new
MaxList<Integer>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Double>> lookupsOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Integer>> queryRateOverTime = Collections.synchronizedList(new
MaxList<Integer>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Integer>> scanRateOverTime = Collections.synchronizedList(new
MaxList<Integer>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Double>> queryByteRateOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Double>> indexCacheHitRateOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static final List<Pair<Long,Double>> dataCacheHitRateOverTime = Collections.synchronizedList(new
MaxList<Double>(MAX_TIME_PERIOD));
 +  private static EventCounter lookupRateTracker = new EventCounter();
 +  private static EventCounter indexCacheHitTracker = new EventCounter();
 +  private static EventCounter indexCacheRequestTracker = new EventCounter();
 +  private static EventCounter dataCacheHitTracker = new EventCounter();
 +  private static EventCounter dataCacheRequestTracker = new EventCounter();
 +  
 +  private static volatile boolean fetching = false;
 +  private static MasterMonitorInfo mmi;
 +  private static Map<String,Map<ProblemType,Integer>> problemSummary = Collections.emptyMap();
 +  private static Exception problemException;
 +  private static GCStatus gcStatus;
 +  
 +  private static Instance instance;
 +  
 +  private static ServerConfiguration config;
 +  
 +  private static EmbeddedWebServer server;
 +  
 +  public static Map<String,Double> summarizeTableStats(MasterMonitorInfo mmi) {
 +    Map<String,Double> compactingByTable = new HashMap<String,Double>();
 +    if (mmi != null && mmi.tServerInfo != null) {
 +      for (TabletServerStatus status : mmi.tServerInfo) {
 +        if (status != null && status.tableMap != null) {
 +          for (String table : status.tableMap.keySet()) {
 +            Double holdTime = compactingByTable.get(table);
 +            compactingByTable.put(table, Math.max(holdTime == null ? 0. : holdTime.doubleValue(),
status.holdTime));
 +          }
 +        }
 +      }
 +    }
 +    return compactingByTable;
 +  }
 +  
 +  public static void add(TableInfo total, TableInfo more) {
 +    if (total.minors == null)
 +      total.minors = new Compacting();
 +    if (total.majors == null)
 +      total.majors = new Compacting();
 +    if (total.scans == null)
 +      total.scans = new Compacting();
 +    if (more.minors != null) {
 +      total.minors.running += more.minors.running;
 +      total.minors.queued += more.minors.queued;
 +    }
 +    if (more.majors != null) {
 +      total.majors.running += more.majors.running;
 +      total.majors.queued += more.majors.queued;
 +    }
 +    if (more.scans != null) {
 +      total.scans.running += more.scans.running;
 +      total.scans.queued += more.scans.queued;
 +    }
 +    total.onlineTablets += more.onlineTablets;
 +    total.recs += more.recs;
 +    total.recsInMemory += more.recsInMemory;
 +    total.tablets += more.tablets;
 +    total.ingestRate += more.ingestRate;
 +    total.ingestByteRate += more.ingestByteRate;
 +    total.queryRate += more.queryRate;
 +    total.queryByteRate += more.queryByteRate;
 +    total.scanRate += more.scanRate;
 +  }
 +  
 +  public static TableInfo summarizeTableStats(TabletServerStatus status) {
 +    TableInfo summary = new TableInfo();
 +    summary.majors = new Compacting();
 +    summary.minors = new Compacting();
 +    summary.scans = new Compacting();
 +    for (TableInfo rates : status.tableMap.values()) {
 +      add(summary, rates);
 +    }
 +    return summary;
 +  }
 +  
 +  private static class EventCounter {
 +    
 +    Map<String,Pair<Long,Long>> prevSamples = new HashMap<String,Pair<Long,Long>>();
 +    Map<String,Pair<Long,Long>> samples = new HashMap<String,Pair<Long,Long>>();
 +    Set<String> serversUpdated = new HashSet<String>();
 +    
 +    void startingUpdates() {
 +      serversUpdated.clear();
 +    }
 +    
 +    void updateTabletServer(String name, long sampleTime, long numEvents) {
 +      Pair<Long,Long> newSample = new Pair<Long,Long>(sampleTime, numEvents);
 +      Pair<Long,Long> lastSample = samples.get(name);
 +      
 +      if (lastSample == null || !lastSample.equals(newSample)) {
 +        samples.put(name, newSample);
 +        if (lastSample != null) {
 +          prevSamples.put(name, lastSample);
 +        }
 +      }
 +      serversUpdated.add(name);
 +    }
 +    
 +    void finishedUpdating() {
 +      // remove any tablet servers not updated
 +      samples.keySet().retainAll(serversUpdated);
 +      prevSamples.keySet().retainAll(serversUpdated);
 +    }
 +    
 +    double calculateRate() {
 +      double totalRate = 0;
 +      
 +      for (Entry<String,Pair<Long,Long>> entry : prevSamples.entrySet()) {
 +        Pair<Long,Long> prevSample = entry.getValue();
 +        Pair<Long,Long> sample = samples.get(entry.getKey());
 +        
 +        totalRate += (sample.getSecond() - prevSample.getSecond()) / ((sample.getFirst()
- prevSample.getFirst()) / (double) 1000);
 +      }
 +      
 +      return totalRate;
 +    }
 +    
 +    long calculateCount() {
 +      long count = 0;
 +      
 +      for (Entry<String,Pair<Long,Long>> entry : prevSamples.entrySet()) {
 +        Pair<Long,Long> prevSample = entry.getValue();
 +        Pair<Long,Long> sample = samples.get(entry.getKey());
 +        
 +        count += sample.getSecond() - prevSample.getSecond();
 +      }
 +      
 +      return count;
 +    }
 +  }
 +  
 +  public static void fetchData() {
 +    double totalIngestRate = 0.;
 +    double totalIngestByteRate = 0.;
 +    double totalQueryRate = 0.;
 +    double totalQueryByteRate = 0.;
 +    double totalScanRate = 0.;
 +    long totalEntries = 0;
 +    int totalTabletCount = 0;
 +    int onlineTabletCount = 0;
 +    long totalHoldTime = 0;
 +    long totalLookups = 0;
 +    boolean retry = true;
 +    
 +    // only recalc every so often
 +    long currentTime = System.currentTimeMillis();
 +    if (currentTime - lastRecalc < REFRESH_TIME * 1000)
 +      return;
 +    
 +    synchronized (Monitor.class) {
 +      if (fetching)
 +        return;
 +      fetching = true;
 +    }
 +    
 +    try {
 +      while (retry) {
 +        MasterClientService.Iface client = null;
 +        try {
 +          client = MasterClient.getConnection(HdfsZooInstance.getInstance());
 +          if (client != null) {
 +            mmi = client.getMasterStats(Tracer.traceInfo(), SecurityConstants.getSystemCredentials());
 +            retry = false;
 +          } else {
 +            mmi = null;
 +          }
 +          Monitor.gcStatus = fetchGcStatus();
 +        } catch (Exception e) {
 +          mmi = null;
 +          log.info("Error fetching stats: " + e);
 +        } finally {
 +          if (client != null) {
 +            MasterClient.close(client);
 +          }
 +        }
 +        if (mmi == null)
 +          UtilWaitThread.sleep(1000);
 +      }
 +      if (mmi != null) {
 +        int majorCompactions = 0;
 +        int minorCompactions = 0;
 +        
 +        lookupRateTracker.startingUpdates();
 +        indexCacheHitTracker.startingUpdates();
 +        indexCacheRequestTracker.startingUpdates();
 +        dataCacheHitTracker.startingUpdates();
 +        dataCacheRequestTracker.startingUpdates();
 +        
 +        for (TabletServerStatus server : mmi.tServerInfo) {
 +          TableInfo summary = Monitor.summarizeTableStats(server);
 +          totalIngestRate += summary.ingestRate;
 +          totalIngestByteRate += summary.ingestByteRate;
 +          totalQueryRate += summary.queryRate;
 +          totalScanRate += summary.scanRate;
 +          totalQueryByteRate += summary.queryByteRate;
 +          totalEntries += summary.recs;
 +          totalHoldTime += server.holdTime;
 +          totalLookups += server.lookups;
 +          majorCompactions += summary.majors.running;
 +          minorCompactions += summary.minors.running;
 +          lookupRateTracker.updateTabletServer(server.name, server.lastContact, server.lookups);
 +          indexCacheHitTracker.updateTabletServer(server.name, server.lastContact, server.indexCacheHits);
 +          indexCacheRequestTracker.updateTabletServer(server.name, server.lastContact, server.indexCacheRequest);
 +          dataCacheHitTracker.updateTabletServer(server.name, server.lastContact, server.dataCacheHits);
 +          dataCacheRequestTracker.updateTabletServer(server.name, server.lastContact, server.dataCacheRequest);
 +        }
 +        
 +        lookupRateTracker.finishedUpdating();
 +        indexCacheHitTracker.finishedUpdating();
 +        indexCacheRequestTracker.finishedUpdating();
 +        dataCacheHitTracker.finishedUpdating();
 +        dataCacheRequestTracker.finishedUpdating();
 +        
 +        int totalTables = 0;
 +        for (TableInfo tInfo : mmi.tableMap.values()) {
 +          totalTabletCount += tInfo.tablets;
 +          onlineTabletCount += tInfo.onlineTablets;
 +          totalTables++;
 +        }
 +        Monitor.totalIngestRate = totalIngestRate;
 +        Monitor.totalTables = totalTables;
 +        totalIngestByteRate = totalIngestByteRate / 1000000.0;
 +        Monitor.totalIngestByteRate = totalIngestByteRate;
 +        Monitor.totalQueryRate = totalQueryRate;
 +        Monitor.totalScanRate = totalScanRate;
 +        totalQueryByteRate = totalQueryByteRate / 1000000.0;
 +        Monitor.totalQueryByteRate = totalQueryByteRate;
 +        Monitor.totalEntries = totalEntries;
 +        Monitor.totalTabletCount = totalTabletCount;
 +        Monitor.onlineTabletCount = onlineTabletCount;
 +        Monitor.totalHoldTime = totalHoldTime;
 +        Monitor.totalLookups = totalLookups;
 +        
 +        ingestRateOverTime.add(new Pair<Long,Double>(currentTime, totalIngestRate));
 +        ingestByteRateOverTime.add(new Pair<Long,Double>(currentTime, totalIngestByteRate));
 +        
 +        double totalLoad = 0.;
 +        for (TabletServerStatus status : mmi.tServerInfo) {
 +          if (status != null)
 +            totalLoad += status.osLoad;
 +        }
 +        loadOverTime.add(new Pair<Long,Double>(currentTime, totalLoad));
 +        
 +        minorCompactionsOverTime.add(new Pair<Long,Integer>(currentTime, minorCompactions));
 +        majorCompactionsOverTime.add(new Pair<Long,Integer>(currentTime, majorCompactions));
 +        
 +        lookupsOverTime.add(new Pair<Long,Double>(currentTime, lookupRateTracker.calculateRate()));
 +        
 +        queryRateOverTime.add(new Pair<Long,Integer>(currentTime, (int) totalQueryRate));
 +        queryByteRateOverTime.add(new Pair<Long,Double>(currentTime, totalQueryByteRate));
 +        
 +        scanRateOverTime.add(new Pair<Long,Integer>(currentTime, (int) totalScanRate));
 +        
 +        calcCacheHitRate(indexCacheHitRateOverTime, currentTime, indexCacheHitTracker, indexCacheRequestTracker);
 +        calcCacheHitRate(dataCacheHitRateOverTime, currentTime, dataCacheHitTracker, dataCacheRequestTracker);
 +      }
 +      try {
 +        Monitor.problemSummary = ProblemReports.getInstance().summarize();
 +        Monitor.problemException = null;
 +      } catch (Exception e) {
 +        log.info("Failed to obtain problem reports ", e);
 +        Monitor.problemSummary = Collections.emptyMap();
 +        Monitor.problemException = e;
 +      }
 +      
 +    } finally {
 +      synchronized (Monitor.class) {
 +        fetching = false;
 +        lastRecalc = currentTime;
 +      }
 +    }
 +  }
 +  
 +  private static void calcCacheHitRate(List<Pair<Long,Double>> hitRate, long
currentTime, EventCounter cacheHits, EventCounter cacheReq) {
 +    long req = cacheReq.calculateCount();
 +    if (req > 0)
 +      hitRate.add(new Pair<Long,Double>(currentTime, cacheHits.calculateCount() /
(double) cacheReq.calculateCount()));
 +    else
 +      hitRate.add(new Pair<Long,Double>(currentTime, null));
 +  }
 +  
 +  private static GCStatus fetchGcStatus() {
 +    GCStatus result = null;
 +    InetSocketAddress address = null;
 +    try {
 +      // Read the gc location from its lock
-       Instance instance = HdfsZooInstance.getInstance();
-       String zooKeepers = instance.getZooKeepers();
-       log.debug("connecting to zookeepers " + zooKeepers);
-       ZooKeeper zk = new ZooKeeper(zooKeepers, (int) config.getConfiguration().getTimeInMillis(Property.INSTANCE_ZK_TIMEOUT),
new Watcher() {
-         @Override
-         public void process(WatchedEvent event) {}
-       });
++      ZooReaderWriter zk = ZooReaderWriter.getInstance();
 +      try {
-         String path = ZooUtil.getRoot(HdfsZooInstance.getInstance()) + Constants.ZGC_LOCK;
++        String path = ZooUtil.getRoot(instance) + Constants.ZGC_LOCK;
 +        List<String> locks = zk.getChildren(path, null);
 +        if (locks != null && locks.size() > 0) {
 +          Collections.sort(locks);
-           address = new ServerServices(new String(zk.getData(path + "/" + locks.get(0),
null, null))).getAddress(Service.GC_CLIENT);
++          address = new ServerServices(new String(zk.getData(path + "/" + locks.get(0),
null))).getAddress(Service.GC_CLIENT);
 +          GCMonitorService.Client client = ThriftUtil.getClient(new GCMonitorService.Client.Factory(),
address, config.getConfiguration());
 +          try {
 +            result = client.getStatus(Tracer.traceInfo(), SecurityConstants.getSystemCredentials());
 +          } finally {
 +            ThriftUtil.returnClient(client);
 +          }
 +        }
 +      } finally {
 +        zk.close();
 +      }
 +    } catch (Exception ex) {
 +      log.warn("Unable to contact the garbage collector at " + address, ex);
 +    }
 +    return result;
 +  }
 +  
 +  public static void main(String[] args) throws Exception {
 +    SecurityUtil.serverLogin();
 +    
 +    FileSystem fs = FileUtil.getFileSystem(CachedConfiguration.getInstance(), ServerConfiguration.getSiteConfiguration());
 +    String hostname = Accumulo.getLocalAddress(args);
 +    instance = HdfsZooInstance.getInstance();
 +    config = new ServerConfiguration(instance);
 +    Accumulo.init(fs, config, "monitor");
 +    Monitor monitor = new Monitor();
 +    Accumulo.enableTracing(hostname, "monitor");
 +    monitor.run(hostname);
 +  }
 +  
 +  private static long START_TIME;
 +  
 +  public void run(String hostname) {
 +    Monitor.START_TIME = System.currentTimeMillis();
 +    int port = config.getConfiguration().getPort(Property.MONITOR_PORT);
 +    try {
 +      log.debug("Creating monitor on port " + port);
 +      server = new EmbeddedWebServer(hostname, port);
 +    } catch (Throwable ex) {
 +      log.error("Unable to start embedded web server", ex);
 +      throw new RuntimeException(ex);
 +    }
 +    
 +    server.addServlet(DefaultServlet.class, "/");
 +    server.addServlet(OperationServlet.class, "/op");
 +    server.addServlet(MasterServlet.class, "/master");
 +    server.addServlet(TablesServlet.class, "/tables");
 +    server.addServlet(TServersServlet.class, "/tservers");
 +    server.addServlet(ProblemServlet.class, "/problems");
 +    server.addServlet(GcStatusServlet.class, "/gc");
 +    server.addServlet(LogServlet.class, "/log");
 +    server.addServlet(XMLServlet.class, "/xml");
 +    server.addServlet(JSONServlet.class, "/json");
 +    server.addServlet(VisServlet.class, "/vis");
 +    server.addServlet(Summary.class, "/trace/summary");
 +    server.addServlet(ListType.class, "/trace/listType");
 +    server.addServlet(ShowTrace.class, "/trace/show");
 +    if (server.isUsingSsl())
 +      server.addServlet(ShellServlet.class, "/shell");
 +    LogService.startLogListener(Monitor.getSystemConfiguration());
 +    server.start();
 +    
 +    new Daemon(new LoggingRunnable(log, new ZooKeeperStatus()), "ZooKeeperStatus").start();
 +    
 +    // need to regularly fetch data so plot data is updated
 +    new Daemon(new LoggingRunnable(log, new Runnable() {
 +      
 +      @Override
 +      public void run() {
 +        while (true) {
 +          try {
 +            Monitor.fetchData();
 +          } catch (Exception e) {
 +            log.warn(e.getMessage(), e);
 +          }
 +          
 +          UtilWaitThread.sleep(333);
 +        }
 +        
 +      }
 +    }), "Data fetcher").start();
 +  }
 +  
 +  public static MasterMonitorInfo getMmi() {
 +    return mmi;
 +  }
 +  
 +  public static int getTotalTables() {
 +    return totalTables;
 +  }
 +  
 +  public static int getTotalTabletCount() {
 +    return totalTabletCount;
 +  }
 +  
 +  public static int getOnlineTabletCount() {
 +    return onlineTabletCount;
 +  }
 +  
 +  public static long getTotalEntries() {
 +    return totalEntries;
 +  }
 +  
 +  public static double getTotalIngestRate() {
 +    return totalIngestRate;
 +  }
 +  
 +  public static double getTotalIngestByteRate() {
 +    return totalIngestByteRate;
 +  }
 +  
 +  public static double getTotalQueryRate() {
 +    return totalQueryRate;
 +  }
 +  
 +  public static double getTotalScanRate() {
 +    return totalScanRate;
 +  }
 +  
 +  public static double getTotalQueryByteRate() {
 +    return totalQueryByteRate;
 +  }
 +  
 +  public static long getTotalHoldTime() {
 +    return totalHoldTime;
 +  }
 +  
 +  public static Exception getProblemException() {
 +    return problemException;
 +  }
 +  
 +  public static Map<String,Map<ProblemType,Integer>> getProblemSummary() {
 +    return problemSummary;
 +  }
 +  
 +  public static GCStatus getGcStatus() {
 +    return gcStatus;
 +  }
 +  
 +  public static long getTotalLookups() {
 +    return totalLookups;
 +  }
 +  
 +  public static long getStartTime() {
 +    return START_TIME;
 +  }
 +  
 +  public static List<Pair<Long,Double>> getLoadOverTime() {
 +    synchronized (loadOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(loadOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Double>> getIngestRateOverTime() {
 +    synchronized (ingestRateOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(ingestRateOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Double>> getIngestByteRateOverTime() {
 +    synchronized (ingestByteRateOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(ingestByteRateOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Integer>> getRecoveriesOverTime() {
 +    synchronized (recoveriesOverTime) {
 +      return new ArrayList<Pair<Long,Integer>>(recoveriesOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Integer>> getMinorCompactionsOverTime() {
 +    synchronized (minorCompactionsOverTime) {
 +      return new ArrayList<Pair<Long,Integer>>(minorCompactionsOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Integer>> getMajorCompactionsOverTime() {
 +    synchronized (majorCompactionsOverTime) {
 +      return new ArrayList<Pair<Long,Integer>>(majorCompactionsOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Double>> getLookupsOverTime() {
 +    synchronized (lookupsOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(lookupsOverTime);
 +    }
 +  }
 +  
 +  public static double getLookupRate() {
 +    return lookupRateTracker.calculateRate();
 +  }
 +  
 +  public static List<Pair<Long,Integer>> getQueryRateOverTime() {
 +    synchronized (queryRateOverTime) {
 +      return new ArrayList<Pair<Long,Integer>>(queryRateOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Integer>> getScanRateOverTime() {
 +    synchronized (scanRateOverTime) {
 +      return new ArrayList<Pair<Long,Integer>>(scanRateOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Double>> getQueryByteRateOverTime() {
 +    synchronized (queryByteRateOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(queryByteRateOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Double>> getIndexCacheHitRateOverTime() {
 +    synchronized (indexCacheHitRateOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(indexCacheHitRateOverTime);
 +    }
 +  }
 +  
 +  public static List<Pair<Long,Double>> getDataCacheHitRateOverTime() {
 +    synchronized (dataCacheHitRateOverTime) {
 +      return new ArrayList<Pair<Long,Double>>(dataCacheHitRateOverTime);
 +    }
 +  }
 +  
 +  public static AccumuloConfiguration getSystemConfiguration() {
 +    return config.getConfiguration();
 +  }
 +  
 +  public static Instance getInstance() {
 +    return instance;
 +  }
 +  
 +  public static boolean isUsingSsl() {
 +    return server.isUsingSsl();
 +  }
 +}


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