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From jacques-n <...@git.apache.org>
Subject [GitHub] drill pull request: DRILL-3742: Classpath scanning
Date Mon, 12 Oct 2015 00:36:39 GMT
Github user jacques-n commented on a diff in the pull request:

    https://github.com/apache/drill/pull/148#discussion_r41718183
  
    --- Diff: common/src/main/java/org/apache/drill/common/scanner/ClassPathScanner.java ---
    @@ -0,0 +1,458 @@
    +/**
    + * 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.drill.common.scanner;
    +
    +import static java.lang.String.format;
    +import static java.util.Arrays.asList;
    +import static java.util.Collections.unmodifiableList;
    +import static java.util.Collections.unmodifiableSet;
    +import static java.util.concurrent.TimeUnit.MILLISECONDS;
    +
    +import java.io.IOException;
    +import java.net.URL;
    +import java.util.ArrayList;
    +import java.util.Arrays;
    +import java.util.Collection;
    +import java.util.Collections;
    +import java.util.Enumeration;
    +import java.util.HashSet;
    +import java.util.List;
    +import java.util.Set;
    +
    +import org.apache.drill.common.config.CommonConstants;
    +import org.apache.drill.common.config.DrillConfig;
    +import org.apache.drill.common.scanner.persistence.AnnotationDescriptor;
    +import org.apache.drill.common.scanner.persistence.AttributeDescriptor;
    +import org.apache.drill.common.scanner.persistence.ChildClassDescriptor;
    +import org.apache.drill.common.scanner.persistence.FieldDescriptor;
    +import org.apache.drill.common.scanner.persistence.FunctionDescriptor;
    +import org.apache.drill.common.scanner.persistence.ParentClassDescriptor;
    +import org.apache.drill.common.scanner.persistence.ScanResult;
    +import org.reflections.Reflections;
    +import org.reflections.adapters.JavassistAdapter;
    +import org.reflections.scanners.AbstractScanner;
    +import org.reflections.util.ConfigurationBuilder;
    +import org.reflections.util.FilterBuilder;
    +
    +import com.google.common.base.Stopwatch;
    +import com.google.common.collect.HashMultimap;
    +import com.google.common.collect.Multimap;
    +import com.google.common.collect.Sets;
    +
    +import javassist.bytecode.AccessFlag;
    +import javassist.bytecode.AnnotationsAttribute;
    +import javassist.bytecode.ClassFile;
    +import javassist.bytecode.FieldInfo;
    +import javassist.bytecode.annotation.AnnotationMemberValue;
    +import javassist.bytecode.annotation.ArrayMemberValue;
    +import javassist.bytecode.annotation.BooleanMemberValue;
    +import javassist.bytecode.annotation.ByteMemberValue;
    +import javassist.bytecode.annotation.CharMemberValue;
    +import javassist.bytecode.annotation.ClassMemberValue;
    +import javassist.bytecode.annotation.DoubleMemberValue;
    +import javassist.bytecode.annotation.EnumMemberValue;
    +import javassist.bytecode.annotation.FloatMemberValue;
    +import javassist.bytecode.annotation.IntegerMemberValue;
    +import javassist.bytecode.annotation.LongMemberValue;
    +import javassist.bytecode.annotation.MemberValue;
    +import javassist.bytecode.annotation.MemberValueVisitor;
    +import javassist.bytecode.annotation.ShortMemberValue;
    +import javassist.bytecode.annotation.StringMemberValue;
    +
    +/**
    + * Classpath scanning utility.
    + * The classpath should be scanned once at startup from a DrillConfig instance. {@see
ClassPathScanner#fromPrescan(DrillConfig)}
    + * The DrillConfig provides the list of packages to scan. (drill.classpath.scanning.packages)
{@see CommonConstants#IMPLEMENTATIONS_SCAN_PACKAGES}
    + * Only the class directories and jars containing a drill-module.conf will be scanned.
    + * Drill core packages are scanned at build time and the result is saved in a JSON file.
{@see ClassPathScanner#FUNCTION_REGISTRY_FILE}
    + * At runtime only the packages that have not be scanned yet will be scanned.
    --- End diff --
    
    not *been* scanned yet


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