Add classpath to netbeans maven project

Question

I have a java project which uses .properties files for configuration. On the server, when launching, I set the classpath to include a folder which contains all the properties files. On my local machine, I'd like to point to a different folder.

I'm looking to add to the classpath, ideally for all projects, but adding it to each project is also fine. I've tried changing the Run > VM Options to include classpath, but with that change it can't find the main class, and I get java.lang.NoClassDefFoundError. I've also tried changing nbactions.xml directly to set the classpath to -classpath ~\MyFolder\;%classpath, but this has the same problem.

To add to the difficulty, the server is running linux while my local machine is running Windows.

Answer 1

I stuck with topic-starter issue also for a long time. My goal - put config files for debug purpose in project root and extend classpath to ${basedir}, so this code:

String appConfigLocation = System.getProperty("config.location");
if (appConfigLocation == null) {
    logger.error("System property 'config.location' is not set...");
    System.exit(1);
}
InputStream appConfigStream = Main.class.getClassLoader().getResourceAsStream(appConfigLocation);
if (appConfigStream == null) {
    logger.error("Can't find resource {} in classpath, fix 'config.location'...", appConfigLocation);
    System.exit(1);
}
Properties appProps = new Properties();
try {
    appProps.load(appConfigStream);
} catch (IOException ex) {
    System.out.println("IO error during loading of {}...", appConfigLocation);
    System.exit(1);
}

read configs from ${basedir}. I like that instead of putting them to src/main/resources.

Check sources of ExecMojo.java for v1.2.1 http://grepcode.com/file/repo1.maven.org/maven2/org.codehaus.mojo/exec-maven-plugin/1.2.1/org/codehaus/mojo/exec/ExecMojo.java?av=f :

if ( CLASSPATH_TOKEN.equals( args[i] ) ) {
    commandArguments.add( computeClasspathString( null ) );
}

and and v1.3.2 http://grepcode.com/file/repo1.maven.org/maven2/org.codehaus.mojo/exec-maven-plugin/1.3.2/org/codehaus/mojo/exec/ExecMojo.java?av=f:

if ( args[i].contains( CLASSPATH_TOKEN ) ) {
     commandArguments.add( args[i].replace( CLASSPATH_TOKEN, 
                           computeClasspathString( null ) ) );
}

So update NB config Execute goals to new version:

process-classes org.codehaus.mojo:exec-maven-plugin:1.3.2:exec

and use complex -classpath args in exec.argsparams:

exec.args=-classpath %classpath:.:"${basedir}" \
    -Dconfig.location=app.properties \
    -Dlogback.configurationFile=logback.xml \
    ${packageClassName}

Fix any action you need to have such behavior:

See also:

• http://wiki.netbeans.org/FaqEnvVarsDuringRun
• http://wiki.netbeans.org/FaqSysPropsDuringRun