編譯Hadoop Eclipse插件

環境：CentOS6.6  JDK1.7.0_72  Ant1.9.4  Hadoop1.2.1 源碼   Eclipse4.4.1

1.進入HADOOP_SRC_HOME/src/contrib/eclipse-plugin下面，修改build.xml，加入如下內容：eclipse的根目錄、hadoop的版本號、ivy版本號、hadoop的一些引用包、在javac里加入  includeantruntime="on"

2.進入HADOOP_SRC_HOME/src/contrib下面，修改build-contrib.xml，修改javac.deprecation的值爲on

3.進入HADOOP_SRC_HOME/src/contrib/eclipse-plugin/META-INF下面，修改MANIFEST.MF文件，修改Bundle-ClassPath的值

4.使用shell命令進入HADOOP_SRC_HOME/src/contrib/eclipse-plugin下面，執行ant命令進行構建

修改後的 HADOOP_SRC_HOME/src/contrib/eclipse-plugin/build.xml 的完整內容以下：

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<!--
   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.
-->

<project default="jar" name="eclipse-plugin">

  <import file="../build-contrib.xml"/>

  <property name="eclipse.home" location="/home/grid/eclipse"/>
  <property name="version" value="1.2.1"/>
  <property name="ivy.version" value="2.1.0"/>

  <path id="eclipse-sdk-jars">
    <fileset dir="${eclipse.home}/plugins/">
      <include name="org.eclipse.ui*.jar"/>
      <include name="org.eclipse.jdt*.jar"/>
      <include name="org.eclipse.core*.jar"/>
      <include name="org.eclipse.equinox*.jar"/>
      <include name="org.eclipse.debug*.jar"/>
      <include name="org.eclipse.osgi*.jar"/>
      <include name="org.eclipse.swt*.jar"/>
      <include name="org.eclipse.jface*.jar"/>

      <include name="org.eclipse.team.cvs.ssh2*.jar"/>
      <include name="com.jcraft.jsch*.jar"/>
    </fileset> 
  </path>

  <!-- Override classpath to include Eclipse SDK jars -->
  <path id="classpath">
    <pathelement location="${build.classes}"/>
    <pathelement location="${hadoop.root}/build/classes"/>
    <path refid="eclipse-sdk-jars"/>
  </path>

  <!-- Skip building if eclipse.home is unset. -->
  <target name="check-contrib" unless="eclipse.home">
    <property name="skip.contrib" value="yes"/>
    <echo message="eclipse.home unset: skipping eclipse plugin"/>
  </target>

 <target name="compile" depends="init, ivy-retrieve-common" unless="skip.contrib">
    <echo message="contrib: ${name}"/>
    <javac
     encoding="${build.encoding}"
     srcdir="${src.dir}"
     includes="**/*.java"
     destdir="${build.classes}"
     debug="${javac.debug}"
     deprecation="${javac.deprecation}"
     includeantruntime="on">
     <classpath refid="classpath"/>
    </javac>
  </target>

  <!-- Override jar target to specify manifest -->
  <target name="jar" depends="compile" unless="skip.contrib">
    <mkdir dir="${build.dir}/lib"/>
    <!--<copy file="${hadoop.root}/build/hadoop-core-${version}.jar" tofile="${build.dir}/lib/hadoop-core.jar" verbose="true"/>
    <copy file="${hadoop.root}/build/ivy/lib/Hadoop/common/commons-cli-${commons-cli.version}.jar"  todir="${build.dir}/lib" verbose="true"/>-->
    <copy file="${hadoop.root}/hadoop-core-${version}.jar" tofile="${build.dir}/lib/hadoop-core.jar" verbose="true"/>  
    <copy file="${hadoop.root}/lib/commons-cli-${commons-cli.version}.jar"  tofile="${build.dir}/lib/commons-cli.jar" verbose="true"/>  
    <copy file="${hadoop.root}/lib/commons-configuration-1.6.jar"  tofile="${build.dir}/lib/commons-configuration.jar" verbose="true"/>  
    <copy file="${hadoop.root}/lib/commons-httpclient-3.0.1.jar"  tofile="${build.dir}/lib/commons-httpclient.jar" verbose="true"/>  
    <copy file="${hadoop.root}/lib/commons-lang-2.4.jar"  tofile="${build.dir}/lib/commons-lang.jar" verbose="true"/>  
    <copy file="${hadoop.root}/lib/jackson-core-asl-1.8.8.jar"  tofile="${build.dir}/lib/jackson-core-asl.jar" verbose="true"/>  
    <copy file="${hadoop.root}/lib/jackson-mapper-asl-1.8.8.jar"  tofile="${build.dir}/lib/jackson-mapper-asl.jar" verbose="true"/>
    <jar
      jarfile="${build.dir}/hadoop-${name}-${version}.jar"
      manifest="${root}/META-INF/MANIFEST.MF">
      <fileset dir="${build.dir}" includes="classes/ lib/"/>
      <fileset dir="${root}" includes="resources/ plugin.xml"/>
    </jar>
  </target>

</project>

HADOOP_SRC_HOME/src/contrib/build-contrib.xml 只須要修改 javac.deprecation 的值爲 on ，默認的是 off

HADOOP_SRC_HOME/src/contrib/eclipse-plugin/META-INF/MANIFEST.MF 只須要修改 Bundle-ClassPath 的值爲 Bundle-ClassPath: classes/,lib/commons-cli.jar,lib/commons-httpclient.jar,lib/hadoop-core.jar,lib/jackson-mapper-asl.jar,lib/commons-configuration.jar,lib/commons-lang.jar,lib/jackson-core-asl.jar

編譯成功後能夠 HADOOP_SRC_HOME/build/contrib/eclipse-plugin 路徑找到插件
遇到的問題總結 ant打包時報錯： BUILD FAILED hadoop-1.2.1/src/contrib/eclipse-plugin/build.xml:66: Compile failed; see the compiler error output for details. 解決方法：在 HADOOP_SRC_HOME 目錄下運行 ant 命令編譯，而後再到 HADOOP_SRC_HOME/src/contrib/eclipse-plugin 目錄下運行 ant 命令編譯