Re: Java-Bean: True

[Steven Coco <ma...@stevencoco.com>]

Hello.  Sorry for the long latency on this one!

It's possible that your only problem is in specifying:

<manifestFile>src/main/resources/META-INF/MANIFEST.MF</manifestFile>

Instead of:

<manifestFile>src/main/resources/MANIFEST.MF</manifestFile>

(Include the META-INF directory).

I general, I don't have a problem defining a manifest, and merging it 
with what Maven generates.  I'll include a POM below that I just tested 
using Maven 2.0.4 to be sure: I created the basic Maven archetype using 
archetype:create and modified the POM as you see it; and I created the 
manifest shown below; and Maven packages that jar as I would expect.

HOWEVER, while we're on this topic, I just feel I should note that the 
jar and war plugins do have a different defect that might also pose an 
issue for you.  See issues MJAR-38 
<http://jira.codehaus.org/browse/MJAR-38>, and MWAR-34 
<http://jira.codehaus.org/browse/MWAR-34>; and also MJAR-39 
<http://jira.codehaus.org/browse/MJAR-39> that might affect your Jars.  
In summary, Maven arbitrarily adds an extension definition to every Jar 
it makes -- and horribly, every War too -- so your project is not just 
going to be a Bean, but an Optional Package also!  I know of no cure for 
this; however, it does appear that someone else has posted a patch; but 
I haven't had a chance to look into it.  I have dropped the sources and 
attempted to make a patch, but chasing all the dependencies and getting 
a workable source set and classpath on my machine has thus far eluded 
me; and nothing is well-documented!  This is a bit fraught to say the 
least -- notice that the combination of an Extension-Name attribute and 
a Main-Class attribute means that the Main-Class is defined to be the 
Optional Package's installer program.  So this is essentially crazy.

Maven is also not generating the Created-By attribute according to the 
intention defined in the Jar specification.  Manifest handling is very 
problematic.

Here's that sample POM and manifest, and good luck.
- Steven Coco.


src/main/resources/META-INF/MANIFEST.MF:

Manifest-Version: 1.0

Name: com/foo/App.class
Java-Bean: True


pom.xml:

<project
        xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                http://maven.apache.org/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>com.foo</groupId>
<artifactId>jar-test</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <configuration>
                <archive>
                    
<manifestFile>src/main/resources/META-INF/MANIFEST.MF</manifestFile>
                    <index>true</index>
                    <manifest>
                        <mainClass>com/foo/App</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>
</project>



-- Original Message:

Derrick Oswald wrote:
> Hi,
>
> Using maven 2, how can you tag some classes in a jar as java beans?
> The MANIFEST.MF file I want is (in part):
>
> Manifest-Version: 1.0
> Archiver-Version: Plexus Archiver
> Created-By: Apache Maven
> ...<snip>
> Class-Path: htmllexer.jar sax-2.0.1.jar
>
> Name: org/htmlparser/Parser.class
> Java-Bean: True
>
> etc.
>
> As usual, the documentation lies and says setting
>   <manifestFile>src/main/resources/MANIFEST.MF</manifestFile>
> is an option; but that doesn't work.
>
> I've tried guessing the usual things in the maven-jar-plugin manifest and manifestEntries sections of the POM, but can only get an error message like:
>  
>  [INFO] Failed to configure plugin parameters for: org.apache.maven.plugins:maven-jar-plugin:2.0
>  Cause: Cannot find setter nor field in org.apache.maven.archiver.ManifestConfigu
>  ration for 'name'
>  
>  or
>  
>  [INFO] Error assembling JAR
>  Embedded error: Specify the section name using the "name" attribute of the <section> element rather than using a "Name" manifest attribute
>  
>  Any help would be appreciated.
>
> Derrick
>
>