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From Jan Matèrne (jhm) <apa...@materne.de>
Subject AW: AW: Javac Run By Ant Script is Unable to Find External Jars
Date Mon, 25 Feb 2019 14:15:18 GMT
A little sample:
* src\java\org\apache\ant\Application.java
  Sample application which uses Log4J2 as external dependency
* src\resources\log4j2.xml
  Configuration file for Log4J2
* build.xml
  Ant buildscript

Run the script with "ant".
Then start the application with "java -jar lib\Application.jar".
The app will prompt all given arguments via Log4J2-Logger.

Have a look at the "build" target and the resulting manifest inside the jar.


Jan


Application.java
----8-<------8-<------8-<------8-<------8-<--
package org.apache.ant;

import java.util.stream.Stream;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;


public class Application {

    public static void main(String[] args) {
        Logger logger = LogManager.getLogger(Application.class);
        if (args.length == 0) {
            logger.info("Application started without any argument.");
        } else {
            logger.info("Application started with %d arguments:%n", args.length);
            Stream.of(args)
                  .map( s -> "- '"+s+"'" )
                  .forEach(logger::info);
        }
    }

}
----8-<------8-<------8-<------8-<------8-<--


log4j2.xml
----8-<------8-<------8-<------8-<------8-<--
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Root level="debug">
            <AppenderRef ref="Console"/>
        </Root>
    </Loggers>
</Configuration>
----8-<------8-<------8-<------8-<------8-<--


build.xml
----8-<------8-<------8-<------8-<------8-<--
<project name="Application" default="build">

    <property name="build.dir" value="build"/>
    <property name="src.dir" value="src"/>
    <property name="lib.dir" value="lib"/>
    <property name="main.class" value="org.apache.ant.Application"/>
    
    <property name="classes.dir" value="${build.dir}/classes"/>
    <property name="java.src" value="${src.dir}/java"/>
    <property name="resources.src" value="${src.dir}/resources"/>


    <target name="clean">
        <delete dir="${build.dir}"/>
    </target>

    <target name="download-dependencies">
        <mkdir dir="${lib.dir}"/>
        <!-- Performance improvement: don't download multiple times -->
        <!-- TODO: available+get as macro -->
        <available property="log4j-core.present" file="${lib.dir}/log4j-core-2.11.2.jar"/>
        <get xmlns:unless="ant:unless"
            unless:set="log4j-core.present"
            src="https://search.maven.org/remotecontent?filepath=org/apache/logging/log4j/log4j-core/2.11.2/log4j-core-2.11.2.jar"
            dest="${lib.dir}/log4j-core-2.11.2.jar" />
        <available property="log4j-api.present" file="${lib.dir}/log4j-api-2.11.2.jar"/>
        <get xmlns:unless="ant:unless"
            unless:set="log4j-api.present"
            src="https://search.maven.org/remotecontent?filepath=org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar"
            dest="${lib.dir}/log4j-api-2.11.2.jar" />
    </target>

    <target name="compile" depends="download-dependencies">
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}" includeantruntime="false">
            <classpath id="cp.runtime">
                <fileset dir="${lib.dir}" includes="**/*.jar"/>
            </classpath>
        </javac>
    </target>

    <target name="build" depends="compile">
        <manifestclasspath property="jar.classpath"
                           jarfile="${build.dir}/${ant.project.name}.jar">
            <classpath refid="cp.runtime"/>
        </manifestclasspath>
        <jar destfile="${build.dir}/${ant.project.name}.jar">
            <fileset dir="${classes.dir}"/>
            <fileset dir="${resources.src}"/>
            <manifest>
                <attribute name="Main-Class" value="${main.class}"/>
                <attribute name="Class-Path" value="${jar.classpath}"/>
            </manifest>
        </jar>
    </target>

</project>
----8-<------8-<------8-<------8-<------8-<--


> -----Ursprüngliche Nachricht-----
> Von: Jan Matèrne (jhm) [mailto:apache@materne.de]
> Gesendet: Montag, 25. Februar 2019 14:08
> An: 'Ant Users List'
> Betreff: AW: AW: Javac Run By Ant Script is Unable to Find External
> Jars
> 
> Could you post the content of the manifest file and your directory
> structure?
> 
> I suppose that the paths are not correct …
> 
> 
> 
> Jan
> 
> 
> 
> Von: Dennis Putnam [mailto:dap1@bellsouth.net]
> Gesendet: Montag, 25. Februar 2019 13:09
> An: user@ant.apache.org
> Betreff: Re: AW: Javac Run By Ant Script is Unable to Find External
> Jars
> 
> 
> 
> My apologies again but I have not made any progress on this problem. Is
> there perhaps a better forum I should be using at this point? I did
> make one discovery. It appears that although the application works in
> Eclipse when I try to export it to a runnable jar using the Eclipse
> wizard, the resulting jar fails as well. It seems to me that the
> problem is not ant specific but something in the app build per se.
> 
> On 2/21/2019 10:18 AM, Dennis Putnam wrote:
> 
> I found an article on adding Maven dependencies to my ant script. While
> I'm getting a successful build but the same exception when I run the
> jar, I hope this is getting me closer. At least the pom.xml is in the
> build. I am wondering if the added fileset is right and working. Here
> is my latest:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <project name="KCBSEvents" default="jar" basedir="."
> xmlns:artifact="antlib:org.apache.maven.artifact.ant">
>         <property name="build.properties" value="build.properties"/>
>         <property name="resources" value="resource" />
>         <property name="jardir" value="KCBSEvents" />
>         <property name="KCBSDir" value="src/KCBSEvents" />
>         <property name="member.number" value="000000" />
>         <property name="member.name" value="" />
>         <property name="jarpath" value="/${user.home}/.m2/repository"
> />
>         <path id="maven-ant-tasks.classpath" path="/lib/jvm-
> exports/maven-ant-tasks-2.1.3.jar" />
>         <typedef resource="org/apache/maven/artifact/ant/antlib.xml"
> uri="antlib:org.apache.maven.artifact.ant" classpathref="maven-ant-
> tasks.classpath" />
>         <artifact:pom id="pomfile" file="pom.xml" />
>         <artifact:dependencies filesetId="mvn-dependencies"
> pomRefId="pomfile" />
>         <path id="compile-jars">
>                 <multirootfileset basedirs="${jarpath}/commons-
> io/2.5,${jarpath}/httpcomponents-client,${jarpath}/commons-
> logging/1.2,${jarpath}/commons-codec/1.10,/lib/java-ext/json-simple-
> 1.1.1">
>                         <include name="commons-io-2.5.jar" />
>                         <include name="httpclient-4.5.6.jar" />
>                         <include name="httpcore-4.4.10.jar" />
>                         <include name="commons-logging-1.2.jar" />
>                         <include name="commons-codec-1.10.jar" />
>                         <include name="json-simple-1.1.1.jar" />
>                 </multirootfileset>
>                 <fileset refid="mvn-dependencies" />
>         </path>
>         <target name="checkOS">
>                 <condition property="isWindows">
>                         <os family="windows" />
>                 </condition>
>                 <condition property="isLinux">
>                         <os family="unix" />
>                 </condition>
>         </target>
>         <target name="if_windows" depends="checkOS" if="isWindows">
>                 <property name="jarfile" value="C:\temp\KCBSEvents.jar"
> />
>                 <property name="antcontrib" value="H:\html\Applets\ant-
> contrib" />
>         </target>
>         <target name="if_linux" depends="checkOS" if="isLinux">
>                 <property name="jarfile"
> value="/tmp/${member.number}/KCBSEvents.jar" />
>                 <property name="antcontrib"
> value="/var/www/html/Applets/ant-contrib/ant-contrib-1.0b3.jar" />
>         </target>
>         <target name="setclass" depends="if_linux,if_windows">
>                 <taskdef
> resource="net/sf/antcontrib/antcontrib.properties">
>                         <classpath>
>                                 <pathelement location="${antcontrib}"
> />
>                         </classpath>
>                 </taskdef>
>  </target>
>         <target name="incserial" depends="setclass">
>                 <copy todir="bin/${jardir}/${resources}">
>                         <fileset dir="${KCBSDir}/${resources}">
>                                 <include name="${build.properties}" />
>                         </fileset>
>                         <filterchain>
>                                 <expandproperties />
>                         </filterchain>
>                 </copy>
>                 <if> <isset Property="build.number" /> <then>
>                         <echo message="update build requested" />
>                 </then> <else>
>                         <echo message="new build requested" />
>                         <buildnumber />
>                 </else> </if>
>                 <propertyfile
> file="bin/${jardir}/${resources}/${build.properties}">
>                         <entry key="serialnumber"
> value="${build.number}" />
>                         <entry key="membernumber"
> value="${member.number}" />
>                         <entry key="name" value="${member.name}" />
>                 </propertyfile>
>                 <echo message="serial number: ${build.number}" />
>         </target>
>         <target name="jar" description="Compile serialized jar"
> depends="incserial,if_windows,if_linux">
>                 <echo message="Using destination file ${jarfile}" />
>                 <javac srcdir="src" destdir="bin"
> includeantruntime="false" classpathref="compile-jars" />
>                 <jar destfile="${jarfile}" basedir="bin"
> filesetmanifest="mergewithoutmain">
>                         <manifest>
>                                 <attribute name="Manifest-Version"
> value="1.0"/>
>                                 <attribute name="Created-By" value="ant
> 1.9.2 on CentOS 7" />
>                                 <attribute name="Main-Class"
> value="KCBSEvents.KCBSEvents" />
>                         </manifest>
>                 </jar>
>         </target>
> </project>
> 
> 
> On 2/20/2019 3:22 PM, Jan Matèrne (jhm) wrote:
> 
> If you have created your JAR the first step is done.
> 
> Starting the JAR could be done in several ways. Common is that you have
> to have all external classes on the runtime classpath:
> 
> 
> 
> 1. Hard coded start script.
> 
> Write a bash/bat-Script with the java command with all cp settings,
> e.g. (bat)
> 
> @echo off
> 
> java -cp /build/myjar.jar;lib/one.jar;lib/two.jar;lib/three.jar
> org.acme.Main %*
> 
> 
> 
> 2. Wrapper script which collects all JARs in a dynamic way (see
> ant.bat|ant.sh)
> 
> 
> 
> 3. Use Ant + <java><classpath> for starting
> 
> 
> 
> 4. Create a runnable JAR which references the external JARs (manifest:
> main-class + classpath)
> 
> 
> 
> 5. Create a shaded jar (uber jar, fat jar): include all classes from
> external jars into your jar
> 
> 
> 
> 6. Use a launcher which uses a dependency manager for getting the
> classpath
> 
> 
> 
> 
> 
> 
> 
> You don't have to replicate path definitions in your buildfile, you
> could (and should) use references:
> 
> <javac><classpath id="runtime.cp"><fileset dir="lib"
> includes="**/*.jar"/>…
> 
> <java><classpath refid="runtime.cp"/>
> 
> 
> 
> 
> 
> You mave have a look at http://ant.apache.org/manual/tutorial-
> HelloWorldWithAnt.html
> 
> 
> 
> 
> 
> Jan
> 
> 
> 
> 
> 
> 
> 



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