hadoop1.2.1-eclipse插件编译

一、安装ant
#sudo apt-get install ant
二、修改编译配置文件
1、在hadoop安装目录下找到src/contrib/eclipse-plugin/build.xml,修改以下几行：

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

......

<target name="jar" depends="compile" unless="skip.contrib">
    <mkdir dir="${build.dir}/lib"/>
    <copy file="${hadoop.root}/hadoop-core-${version}.jar" tofile="${build.dir}/lib/hadoop-core.jar" verbose="true"/>
    <copy file="${hadoop.root}/lib/commons-cli-1.2.jar"  todir="${build.dir}/lib" verbose="true"/>
    <copy file="${hadoop.root}/lib/commons-lang-2.4.jar"  todir="${build.dir}/lib" verbose="true"/>
    <copy file="${hadoop.root}/lib/commons-configuration-1.6.jar"  todir="${build.dir}/lib" verbose="true"/>
    <copy file="${hadoop.root}/lib/jackson-mapper-asl-1.8.8.jar"  todir="${build.dir}/lib" verbose="true"/>
    <copy file="${hadoop.root}/lib/jackson-core-asl-1.8.8.jar"  todir="${build.dir}/lib" verbose="true"/>
    <copy file="${hadoop.root}/lib/commons-httpclient-3.0.1.jar"  todir="${build.dir}/lib" 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>

2、在/src/contrib/下找到build-contrib.xml，添加如下内容：

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

注：eclipse的路径请换成你主机上的eclipse存放路径。
3、在src/contrib/eclipse-plugin目录下找到META-INF/MANIFEST.MF文件更改如下内容：
将Bundle-ClassPath: classes/,lib/hadoop-core.jar改为

Bundle-ClassPath: classes/,lib/hadoop-core.jar,lib/jackson-core-asl-1.8.8.jar ,lib/jackson-mapper-asl-1.8.8.jar, lib/commons-configuration-1.6.jar,lib/commons-lang-2.4.jar, lib/commons-httpclient-3.0.1.jar,lib/commons-cli-1.2.jar

4、返回src/contrib/eclipse-plugin编译
ant
5、在{hadoophome}/build/contrib/eclipse-plugin下找到编译好的插件hadoop-eclipse-plugin-1.2.1.jar并将其copy到eclipse下的plugin目录下（{hadoophome}为hadoop安装目录）
注意：1、在有网络连接的环境下安装
 2、编译的插件与eclipse版本没有关系，仅与hadoop版本和eclipse的安装目录有关系