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Re: [tycho-user] How do I import a bundle-packaged project into Eclipse for debug?

Hi Igor -

Attached is a small zip file will all the parts.  There is a bundle-parent project that provides several Maven definitions, a BundleGuava project that should be the simple "wrapper" project, and a BundleUser project that should be launchable as an Eclipse application.  Maven build all three (in order above), import the projects into Eclipse, and try to launch the BundleUser project (from an Eclipse sample).

When I click on the provided action (the Eclipse icon), I get the "java.lang.ClassNotFoundException: com.google.common.base.Joiner cannot be found by BundleUser_1.0.0.qualifier".

This should be nearly identical to the zip file attached in the original email.  Some small tweaks to BundleGuava project.  This was created by cp -r of  my sample projects, deleting the .git and */target directories, and zip -r over the remaining tree.

I'm actually working on a much larger project (DepAn), with 8+ third-party libraries (asm, guava, jogl, joda, jung, xstream, etc.).  Having a systematic scheme for creating third party libraries in Maven versus using hacked-up custom Eclipse builds will be a boon for generating releases.

Thanks for taking the time to look into the details.
   Lee

On Fri, Oct 24, 2014 at 5:33 PM, Igor Fedorenko <igor@xxxxxxxxxxxxxx> wrote:
Please provide complete standalone example and exact steps to reproduce
the problem and I'll have a look.

--
Regards,
Igor


On 2014-10-24, 19:42, Lee Carver wrote:
I must be missing something here.  My attempts to import a wrapper
bundle still lead to a run-time ClassNotFoundException when I try to
debug the sample application that is attached.

I've reduced the BundleGuava project down to just a pom.xml file.  This
eliminated the .project, .classpath, and META-INF/MANIFEST files that
had been present in the project.  I think this packaging is identical to
the packaging for the itp02/build01/pomfirst-thirdparyt/pom.xml.  I do
not have any project that resembles the
itp02/build01/pomfirst-bundle/pom.xml.

When I import the BundleGuava project as an existing Maven project, the
.project and .classpath files where created from scratch.  The Tycho and
Eclipse compilers seem happy with this arrangement.

However, when I try to launch the BundleUser as an Eclipse application,
I get this exception:

java.lang.NoClassDefFoundError: com/google/common/base/Joiner
Caused by: java.lang.ClassNotFoundException:
com.google.common.base.Joiner cannot be found by BundleUser_1.0.0.qualifier

Although I've imported BundleGuava as an Existing Maven Project, the IDE
does not seem to recognize it as a project that can be added to the
build.  I note that is is not listed in the Debug Configuration page for
Plugins.  Although I can add it a a project for the build dependencies,
it does not seem to be recognized as a Workspace plugin.

I sure I'm omitting one essential Maven attribute on some configuration
page.  And I'd sure appreciate some help figuring out which attribute thats.

(I'm using Guava as an example.  In my RPC application, I have a large
number of more exotic libraries.  Regardless, I look forward to using an
externally packaged Guava in the future.)

Here's the pom.xml for BundleGuava:

<projectxmlns="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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.demo.bundle</groupId>
<artifactId>bundle-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../bundle-parent/pom.xml</relativePath>
</parent>

<artifactId>BundleGuava</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>bundle</packaging>

<properties>
<guava.version>18.0</guava.version>
</properties>

<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
</dependencies>

<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>

<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>2.5.3</version>
<extensions>true</extensions>
<configuration>
<instructions>
<Embed-Dependency>*;scope=compile|runtime</Embed-Dependency>
<_nouses>true</_nouses>
<_exportcontents>com.google.common.*</_exportcontents>
<_removeheaders>
               Import-Package,
               Embed-Dependency,
               Embedded-Artifacts,
               Private-Package
</_removeheaders>
</instructions>
</configuration>
</plugin>
</plugins>
</build>

</project>


On Fri, Oct 24, 2014 at 12:58 PM, Igor Fedorenko <igor@xxxxxxxxxxxxxx
<mailto:igor@xxxxxxxxxxxxxx>> wrote:

    Have a look at tycho wiki [1], pomfirst-thirdparty is an example of what
    I called "wrapper" bundle. In your case, you have bundle that "wraps"
    guava. You just import such projects as existing Maven Projects in
    eclipse, and everything should just work.

    [1]
    https://wiki.eclipse.org/__Tycho/How_Tos/Dependency_on___pom-first_artifacts
    <https://wiki.eclipse.org/Tycho/How_Tos/Dependency_on_pom-first_artifacts>

    --
    Regards,
    Igor

    On 2014-10-24, 15:35, Lee Carver wrote:

        Igor -

        How do I create the "wrapper" bundle?  Just including the
        dependency on
        the BundleGuava "bundling" project does not get the Eclipse
        workspace right.

        Do I need to create a separate Eclipse project?  Exactly how
        should it
        be set up?  Is there an example in the m2e code base?

        Thanks
             Lee

        On Fri, Oct 24, 2014 at 12:12 PM, Igor Fedorenko
        <igor@xxxxxxxxxxxxxx <mailto:igor@xxxxxxxxxxxxxx>
        <mailto:igor@xxxxxxxxxxxxxx <mailto:igor@xxxxxxxxxxxxxx>>> wrote:

             Sadly, PDE does not provide API to implement this, but
        there are two
             workarounds

             * If you have m2e/tycho integration installed, you can
        import your
             "wrapper" bundles in Eclipse workspace and these bundle
        projects should
             become available for other projects. This is what I usually do.

             * Alternatively, you can copy these wrapper bundle to
             <eclipse-install>/dropins folder. They should become
        available for other
             workspace projects after eclipse restart.

             --
             Regards,
             Igor


             On 2014-10-24, 15:02, Lee Carver wrote:

                 I'm trying to use Maven and m2e to develop an RCP
        client that
                 includes
                 several third-partly libraries. In the past, I've been
        able to
                 use the
                 custom plugin builds and a local repository of
        third-party jars,
                 but I
                 was hoping to do better with Maven.

                 As a minimal example, I've tried to package a recent
        Google Guava
                 release as a third-party OSGi component.  I create the
        component
                 with
                 "bundle" packages, and the target/../BundleGuava..jar
        has all the
                 expected components.  The rest of the details are in the
                 attached zip,
                 but the bundle instructions are:

                         <plugin>
                           <groupId>org.apache.felix</____groupId>
                           <artifactId>maven-bundle-____plugin</artifactId>
                           <version>2.5.3</version>
                           <extensions>true</extensions>
                           <configuration>
                             <instructions>
                               <Embed-Dependency>*</Embed-____Dependency>
                               <Export-Package>
                                 com.google.common.*
                               </Export-Package>
                               <_nouses>true</_nouses>
                               <_removeheaders>
                                 Embed-Dependency,
                                 Embedded-Artifacts,
                                 Import-Package,
                                 Private-Package
                               </_removeheaders>
                             </instructions>
                           </configuration>
                         </plugin>

                 However, I cannot get the client plugin, GuavaUser, to
        properly
                 accept
                 the new module.  I thought that the following
        dependency would
                 make the
                 artifact from above available in Eclipse.

                     <dependencies>
                       <dependency>
                         <groupId>org.demo.bundle</____groupId>
                         <artifactId>BundleGuava</____artifactId>
                         <version>1.0.0-SNAPSHOT</____version>
                       </dependency>
                     </dependencies>

                 The Maven build appears to work fine, but Eclipse reports
                 problems.  The
                 sample call for Joiner.on(", ").join("Hello", "world")
        turns into an
                 ClassNotFoundException.

                 I'd like to do most of my debugging in the Eclipse IDE
                 environment, but
                 that would require successful launches from the Eclipse
                 debugger.  What
                 is the best way to make the bundled third-party library
                 available to the
                 Eclipse IDE.


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Attachment: demo-001a.zip
Description: Zip archive


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