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From vijayaratha vijayasingam <vijayara...@gmail.com>
Subject How to avoid long classpath issue in windows
Date Mon, 02 Apr 2012 05:09:42 GMT
Hi all;
Im facing a long classpath issue in windows with my build.xml.
If i  define the build.xml as follows[1], im getting long classpath issue[2]

[1]<target name="init">
        <mkdir dir="${class.dir}"/>
        <mkdir dir="./../../work/temp/sampleClient"/>
          <path id="javac.classpath">
            <pathelement path="${class.dir}"/>
            <pathelement path="../../lib"/>
            <fileset dir="../../repository/components/plugins">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../lib">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../lib/endorsed">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../repository/components/extensions">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../repository/components/lib">
                <include name="*.jar"/>
            </fileset>
        </path>

    </target>

    <target name="compile" depends="init" description="Compile all
Java">
        <javac srcdir="src" destdir="${class.dir}"
includeantruntime="false">
            <classpath refid="javac.classpath"/>
        </javac>
    </target>

[2}

\build.xml:128: java.io.IOException: Cannot run program "C:\Program
Files\Java\jdk1.6.0_20\jr
\bin\java.exe": CreateProcess error=87, The parameter is incorrect
    [java]     at org.apache.tools.ant.taskdefs.Java.fork(Java.java:798)
    [java]     at
org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:214)
    [java]     at
org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:135)
    [java]     at org.apache.tools.ant.taskdefs.Java.execute(Java.java:108)
    [java]     at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
    [java]     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown
Source)
    [java]     at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    [java]     at java.lang.reflect.Method.invoke(Method.java:597)
    [java]     at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    [java]     at org.apache.tools.ant.Task.perform(Task.java:348)
    [java]     at org.apache.tools.ant.Target.execute(Target.java:390)
    [java]     at org.apache.tools.ant.Target.performTasks(Target.java:411)
    [java]     at
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
    [java]     at
org.apache.tools.ant.Project.executeTarget(Project.java:1368)
    [java]     at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    [java]     at
org.apache.tools.ant.Project.executeTargets(Project.java:1251)
    [java]     at org.apache.tools.ant.Main.runBuild(Main.java:809)
    [java]     at org.apache.tools.ant.Main.startAnt(Main.java:217)
    [java]     at
org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    [java]     at
org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
    [java] Caused by: java.io.IOException: Cannot run program "C:\Program
Files\Java\jdk1.6.0_20\jre\bin\java.exe": CreateProcess error=87, The param
ter is incorrect
    [java]     at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
    [java]     at java.lang.Runtime.exec(Runtime.java:593)
    [java]     at
org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.exec(Execute.java:862)
    [java]     at
org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:481)
    [java]     at
org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:495)
    [java]     at org.apache.tools.ant.taskdefs.Java.fork(Java.java:791)
    [java]     ... 19 more
    [java] Caused by: java.io.IOException: CreateProcess error=87, The
parameter is incorrect
    [java]     at java.lang.ProcessImpl.create(Native Method)


To avoid this in introduced a property and tried to pass that as javac
classpath as follows[3]; But now im getting class not found exception[4]
 I  would really appreciate any help on this long class path issue..

[3]  <target name="init">
        <mkdir dir="${class.dir}"/>
        <mkdir dir="./../../work/temp/sampleClient"/>
          <path id="temp.classpath">
            <pathelement path="${class.dir}"/>
            <pathelement path="../../lib"/>
            <fileset dir="../../repository/components/plugins">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../lib">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../lib/endorsed">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../repository/components/extensions">
                <include name="*.jar"/>
            </fileset>
            <fileset dir="../../repository/components/lib">
                <include name="*.jar"/>
            </fileset>
        </path>
 <property name="temp" refid="temp.classpath" />
        <path id="javac.classpath">
            <pathelement location="${temp}"/>
        </path>

    </target>

    <target name="compile" depends="init" description="Compile all
Java">
        <javac srcdir="src" destdir="${class.dir}"
includeantruntime="false">
            <classpath refid="javac.classpath"/>
        </javac>
    </target>

[4]  [java] java.lang.NoClassDefFoundError:
samples/userguide/StockQuoteClient
 [java] Caused by: java.lang.ClassNotFoundException:
samples.userguide.StockQuoteClient
 [java]     at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
 [java]     at java.security.AccessController.doPrivileged(Native Method)
 [java]     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
 [java]     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 [java]     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
 [java]     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
 [java] Could not find the main class: samples.userguide.StockQuoteClient.
Program will exit.
 [java] Exception in thread "main"
 [java] Java Result: 1


Thanks
-Ratha

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