1. SVN Server – The one which holds the various revisions of developer’s code
2. CI Server – The one which perform builds
3. Build Management Tool – The tool that helps CI Server to manage the project like class compilation, Bundling Jars,Wars,Ears
4. Application Server – A single place where developer’s written Servlets, EJB and Web Services  survives 

<?xml version="1.0" encoding="UTF-8"?>
<project name="App1" default="All" basedir="."> 
  <!-- Define the properties used by the build -->
  <property name="app.name"        value="App1"/>
  <property name="tomcat.home"     value="${basedir}/lib/tomcat-lib" />
  <property name="struts.home"     value="${basedir}/lib/struts-lib" />
  <property name="hibernate.home"  value="${basedir}/lib/hibernate-lib" />
  <property name="axis2.home"      value="${basedir}/lib/axis-lib" />
  <property name="poi.home"        value="${basedir}/lib/pom-lib" />
  <property name="mysql.home"      value="${basedir}/lib/mysql-lib" />
  <property name="log4j.home"      value="${basedir}/lib/log4j-lib" />
  <property name="work.home"       value="${basedir}/work"/>
  <property name="dist.home"       value="${basedir}/dist"/>
  <property name="src.home"        value="${basedir}/src"/>
  <property name="web.home"        value="${basedir}/WebContent"/>
   <!-- Define the CLASSPATH -->
  <path id="compile.classpath">
    <fileset dir="${tomcat.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${struts.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${hibernate.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${axis2.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${poi.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${log4j.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${mysql.home}">
      <include name="*.jar"/>
    </fileset>
  </path>
  <target name="All" depends="init,compile,dist" description="Clean work dirs, then compile and create a WAR"/>
  <target name="init">
    <mkdir dir="build/classes"/>
    <mkdir dir="dist" />
  </target>
  <target name="clean" description="Delete old work and dist directories">
    <delete dir="${work.home}"/>
    <delete dir="${dist.home}"/>
  </target>

  <target name="prepare" depends="clean" description="Create working dirs and copy static files to work dir">
    <mkdir  dir="${dist.home}"/>
    <mkdir  dir="${work.home}/WEB-INF/classes"/>
    <!-- Copy static HTML and JSP files to work dir -->
    <copy todir="${work.home}">
      <fileset dir="${web.home}"/>
    </copy>
  </target>

  <target name="compile" depends="prepare"
          description="Compile Java sources and copy to WEB-INF/classes dir">
    <javac srcdir="${src.home}" destdir="${work.home}/WEB-INF/classes" debug="true" debuglevel="lines,vars,source">
    <classpath refid="compile.classpath"/>
    </javac>
     <copy  todir="${work.home}/WEB-INF/classes">
      <fileset dir="${src.home}" excludes="**/*.java"/>
    </copy>
    <copy  todir="${work.home}/WEB-INF/lib">
      <fileset dir="${tomcat.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${struts.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${hibernate.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${axis2.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${poi.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${log4j.home}">
      <include name="*.jar"/>
    </fileset>
    <fileset dir="${mysql.home}">
      <include name="*.jar"/>
    </fileset>
    </copy>
  </target>

  <target name="dist" depends="compile"
          description="Create WAR file for binary distribution">
    <war destfile="${dist.home}/App1.war">
         <fileset dir="${work.home}"/>
         <lib dir="${work.home}/WEB-INF/lib"/>
         <classes dir="${work.home}/WEB-INF/classes"/>
    </war>
  </target>
</project>