Re: A Goal that can execute a class' main method?

John Casey Fri, 13 Aug 2004 15:12:41 -0700

1)  Is there a webpage somewhere that lists all the variables that maven
makes available that can be accessed in maven.xml? I hate having to ask
stupid questions about that even though I cant find a listing =/

No single page, I don't think...(maybe I'm not up to date on that, though). You might have some luck here:

http://maven.apache.org/reference/plugins/index.html

2) Here is what I've got in there now:


<snip/>


However I forgot that the actual files generated by the project arent on the
dependency list, is there a variable that holds the path to the target jar
file that is generated? I need it for my classpath.


You might try adding a classpath refid to maven.build.dest


Also this line I used: <ant:jvmarg value="-DnadaPath=${nadaPath}"/>
is that gonna fly?  basically I just need to pass a variable from the
current jvm system property into the spawned version from ant's java?


I think so, but I've never actually used it.

Thanks, David ----- Original Message ----- From: "John Casey" <[EMAIL PROTECTED]> To: "Maven Users List" <[EMAIL PROTECTED]> Sent: Friday, August 13, 2004 3:49 PM Subject: Re: A Goal that can execute a class' main method?

1) within the <ant:classpath> I need to somehow iterate through the list

of

The short answer is to use ${maven.dependency.classpath}...see below:

From the aspectj-3.0 plugin:

      <ant:iajc
          fork="${maven.aspectj.fork}"
          maxmem="${maven.aspectj.maxmem}"
          incremental="${maven.aspectj.incremental}"
          destDir="${maven.build.dest}"
          sourceRootCopyFilter="${maven.aspectj.sourceRootCopyFilter}"
          debug="${maven.aspectj.debug}"
          emacssym="${maven.aspectj.emacssym}"
          verbose="${maven.aspectj.verbose}">

.
.
.

        <ant:classpath>
          <ant:path refid="maven.dependency.classpath"/>

.
.
.

        </ant:classpath>

.
.
.
      </ant:iajc>

2) Secondly if the user specifies multiple classpath entries, like


maven -DadditionalClasspath="/path/to/something.jar;/path/to/anotherjar.jar"

is there someway for me to break that up into classpath entries?


Try this:

<util:tokenize
xmlns:util="jelly:util"
delim=";"
trim="true"
var="myPaths">
${additionalClasspath}
</util:tokenize>

<c:forEach xmlns:c="jelly:core" items="${myPaths}" var="path">
  <ant:pathelement path="${path}"/>
</c:forEach>

3) and i lied one more question, to access VM variables do I simply do
{variableName} from maven.xml?


What types of args are you trying to gain access to? You might be able
to access them as system properties (for example: ${java.vm.version} or
something)...beyond that, I'm not sure.

Thanks,
David

----- Original Message ----- From: "John Casey" <[EMAIL PROTECTED]> To: "Maven Users List" <[EMAIL PROTECTED]> Sent: Friday, August 13, 2004 3:21 PM Subject: Re: A Goal that can execute a class' main method?

You might want to try Ant's <java> task for this. To use it, you should
try embedding in a custom goal within your project's maven.xml file.
I'll look something like this:

<project default="dbLoad" xmlns:ant="jelly:ant">

 <goal name="dbLoad">
   <ant:java [...options...] classname="com.myco.DbLoader">
     <ant:arg value="${myData}"/>

     <ant:classpath>
       <ant:pathelement path="${myPath}"/>
     </ant:classpath>
   </ant:java>
 </goal>

</project>

which you might then invoke using the following command:

maven -DmyData=/path/to/my/data -DmyPath=/path/to/my/classes dbLoad

You can find more info on the Ant java task at:
http://ant.apache.org/manual/CoreTasks/java.html

HTH,
john

David Erickson wrote:

Hi guys got a couple questions. Ive got a project that has a class


that

updates a database with information. What I was wondering is if it
would be
possible to make a maven goal that executes that class, thus making it
easy
on the end user (since the majority of the dependencies are listed
within
the dep list).  The requirements are these:
1) I'd need to be able to pass in a java environment variable (from the
command line) for where the datafiles are at to be ported into the db
2) I'd need to be able to add elements to the classpath of the class
that
will be executed (From the command line) in addition to the


dependencies

that are listed within maven
Is something like this possible? And if so, if you could point me in

the

direction on how to implement it I'd be greatly appreciative.
Thanks,
David


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Re: A Goal that can execute a class' main method?

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