No .class file in the jar when adding a META-INF/services directory

Question

I've just started to use Maven and I am having trouble creating a JAR of all my classes. In fact, I have to include a service located at WEB-INF/services/javax.annotation.processing.Processor

I've tested different issues with this problem and it appears that when I remove the /services directory, the JAR contains all the .class files.

I read that it could be a wrong Maven folder structure but the problem occurs just when I have the servicesdirectory present.

Here is an extract of my pom.xml file working with resources:

<resource>
    <directory>${myRessources}</directory>
        <includes>
            <include>META-INF/**/*</include>
         </includes>
</resource>

The maven console tell me that the resource is successfully copied so I assume this part is not the problem.

Any ideas?

They are located in src/main/java ; my resources are located in src/main/resources so the META-INF directory is in src/main/resources/META-INF/services/* — MadJlzz, Aug 26 '14 at 12:27
then I dont think you need to explicitly define the include tag — sanbhat, Aug 26 '14 at 12:29
@JuriexFF can you please post your complete pom.xml? Can you also check that the class files are generated in the `target/classes` directory? — Thomas, Aug 26 '14 at 13:04

score 2 · Answer 1 · answered Aug 26 '14 at 12:31

2

Hey you want to use something like this:

<build>
  <sourceDirectory>src/main/java (or your .java you want to compile)</sourceDirectory>
   <resources>
    <resource>
     <directory>src/main/resources/META-INF/</directory>
     <targetPath>META-INF</targetPath>
    </resource>
   </resources>
</build>

The sourceDirectory tells maven what to compile and put in the target folder (and in the jar). Then the resource says take everything in my META-INF/ folder and put it in the META-INF folder of the jar file.

answered Aug 26 '14 at 12:31

user2615862

149
1
10

I am okay with you but with this solution, my .jar file doesn't contain any .class file ! – MadJlzz Aug 26 '14 at 12:43
That shouldn't be necessary, du to convention-over-configuration. – Thomas Aug 26 '14 at 13:02
@Thomas can you explain? – user2615862 Aug 26 '14 at 13:12
1

Well, by default Maven uses `src/main/java` as the source directory and `src/main/resources` as the resources directory by default/convention. Thus unless you need something special or different, there's no need to specify that. – Thomas Aug 26 '14 at 13:19
That's what I needed. In my case I had to set the `` to `META-INF/services`. – martoncsukas Jan 30 '15 at 09:55

score 1 · Accepted Answer · answered Aug 27 '14 at 06:57

1

I investigate and solved the problem : it was a bug --> http://jira.codehaus.org/browse/MCOMPILER-97 I add the compiler option -proc:none and it works fine now. Hope it helps other people !

answered Aug 27 '14 at 06:57

MadJlzz

767
2
13
35

score 0 · Answer 3 · answered Jan 30 '15 at 09:57

What can lead you to the solution either speaking of *.jar or *.war files is that after the creation of the archive file, open it with WinRAR for example, and examine its content.

After this, you can include the necessary resources in the pom.xml file, as it was mentioned here before.

No .class file in the jar when adding a META-INF/services directory

3 Answers3