Re: HELP! Unresolved constraint in bundle

Wed, 13 Jan 2010 06:20:15 -0800 


On 1/13/10 7:44, Renaud Pelissier wrote:

Hello,


I have spent the last two days trying to understand what I am doing 
wrong but I cannot find out by myself.



I want to build a lib bundle that will contain the package 
"fr.numvision.common" using Maven and the maven-bundle-plugin. So 
every classes inside it can ben used by some other bundle.
My package depends on external jars such as commons-io, log4j, jdom... 
so they need to be embedded into the bundle.


The bnd part of the plugin looks like:

<Bundle-SymbolicName>${pom.groupId}.${pom.artifactId}</Bundle-SymbolicName> 


<Bundle-Name>${pom.artifactId}</Bundle-Name>
<Bundle-Version>2.0</Bundle-Version>
<Export-Package>fr.numvision.*</Export-Package>
<Private-Package>!fr.numvision.*,*</Private-Package>


Everythings build fines, I can even install the bundle into felix. The 
pb comes when I try to activate the bunde.


Here is what I get:

-> install file:D:\MavenRepositoryImports\common-1.0-SNAPSHOT.jar
Bundle ID: 9
-> ps
START LEVEL 1
  ID   State         Level  Name
[   0] [Active     ] [    0] System Bundle (2.0.1)
[   1] [Active     ] [    1] Apache Felix Bundle Repository (1.4.2)
[   2] [Active     ] [    1] Apache Felix Shell Service (1.4.1)
[   3] [Active     ] [    1] Apache Felix Shell TUI (1.4.1)
[   9] [Installed  ] [    1] common (2.0)
-> start 9

org.osgi.framework.BundleException: Unresolved constraint in bundle 
fr.numvision.common [9]: package; (package=.)




I do not understand this error: every lib class where embedded in the 
jar. The only strange things I can see is the Import-Package part of 
the MANIFEST which starts by "." and by the package name itself 
(isn'it strange for the package to import itself?).


It is ok for a bundle to import what it exports, the FAQ discusses this:

    http://felix.apache.org/site/apache-felix-osgi-faq.html


I think Felix is correct, the issue likely lies with the fact that you 
are importing the default package (i.e., "."), which is not supported in 
OSGi due to obvious name clash issues.


-> richard



Thanks for your help, I am litteraly getting crazy!

Renaud Pelissier




The MANIFEST.MF

Manifest-Version: 1.0
Export-Package: fr.numvision.common.xml;uses:="fr.numvision.common",fr
.numvision.common.windows,fr.numvision.common.ssh;uses:="fr.numvision
.common.xml,fr.numvision.common",fr.numvision.common,fr.numvision.com
mon.exec;uses:="fr.numvision.common"
Private-Package: com.jcraft.jsch,com.jcraft.jsch.jce,com.jcraft.jsch.j
craft,com.jcraft.jsch.jgss,org.apache.commons.exec,org.apache.commons
.exec.environment,org.apache.commons.exec.launcher,org.apache.commons
.exec.util,org.apache.commons.io,org.apache.commons.io.comparator,org
.apache.commons.io.filefilter,org.apache.commons.io.input,org.apache.
commons.io.output,org.apache.commons.lang,org.apache.commons.lang.bui
lder,org.apache.commons.lang.enum,org.apache.commons.lang.enums,org.a
pache.commons.lang.exception,org.apache.commons.lang.math,org.apache.
commons.lang.mutable,org.apache.commons.lang.text,org.apache.commons.
lang.time,org.jdom,org.jdom.adapters,org.jdom.filter,org.jdom.input,o
rg.jdom.output,org.jdom.transform,org.jdom.xpath,org.snipecode.reg,or
g.snipecode.reg.test
Built-By: renaud
Tool: Bnd-0.0.238
Bundle-Name: common
Created-By: Apache Maven Bundle Plugin
Build-Jdk: 1.6.0_17
Bundle-Version: 2.0
Bnd-LastModified: 1263312797074
Bundle-ManifestVersion: 2
Import-Package: .,fr.numvision.common,fr.numvision.common.exec,fr.numv
ision.common.ssh,fr.numvision.common.windows,fr.numvision.common.xml,
javax.crypto,javax.crypto.interfaces,javax.crypto.spec,javax.xml.pars
ers,javax.xml.transform,javax.xml.transform.sax,javax.xml.transform.s
tream,junit.framework,oracle.xml.parser,oracle.xml.parser.v2,org.apac
he.xerces.dom,org.apache.xerces.parsers,org.ietf.jgss,org.jaxen,org.j
axen.jdom,org.w3c.dom,org.xml.sax,org.xml.sax.ext,org.xml.sax.helpers
Bundle-SymbolicName: fr.numvision.common
Originally-Created-By: Apache Maven Bundle Plugin



The POM:


<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>fr.numvision</groupId>
<artifactId>common</artifactId>
<packaging>bundle</packaging>
<version>1.0-SNAPSHOT</version>
<name>common</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!--
           mvn install:install-file -DgroupId=org.apache.commons
           -DartifactId=exec -Dversion=1.0 -Dpackaging=jar

           
-Dfile=D:\MavenRepositoryImports\commons-exec-1.0\commons-exec-1.0.jar

       -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-exec</artifactId>
<version>1.0</version>
<scope>compile</scope>
</dependency>
<!--
           mvn install:install-file -DgroupId=org.apache.commons
           -DartifactId=exec -Dversion=1.0 -Dpackaging=jar

           
-Dfile=D:\MavenRepositoryImports\commons-exec-1.0\commons-exec-1.0.jar

       -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
<scope>compile</scope>
</dependency>

<!--
           mvn install:install-file -DgroupId=org.apache.commons
           -DartifactId=lang -Dversion=2.4 -Dpackaging=jar

           
-Dfile=D:\MavenRepositoryImports\commons-lang-2.4\commons-lang-2.4.jar

       -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.4</version>
<scope>compile</scope>
</dependency>

<!-- D:\MavenRepositoryImports\jsch-0.1.42 -->
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.41</version>
<scope>compile</scope>
</dependency>

<!--

           mvn install:install-file -DgroupId=org.snipecode 
-DartifactId=reg

           -Dversion=1.0 -Dpackaging=jar
           -Dfile=D:\MavenRepositoryImports\org.snipecode.reg-1.0.jar
       -->
<dependency>
<groupId>org.snipecode</groupId>
<artifactId>reg</artifactId>
<version>1.0</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom</artifactId>
<version>1.1</version>
<scope>compile</scope>
</dependency>

</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>1.4.0</version>
<extensions>true</extensions>
<configuration>
<excludeDependencies>*;scope=provided|runtime</excludeDependencies>
<instructions>

<Bundle-SymbolicName>${pom.groupId}.${pom.artifactId}</Bundle-SymbolicName> 


<Bundle-Name>${pom.artifactId}</Bundle-Name>

<Bundle-Version>2.0</Bundle-Version><!--Tout ce qui est dans 
Private-Package sera copié à l'intérieur du paquet 
org.apache.*,com.jcraft.*,org.jdom.*,org.snipecode.*-->

<Export-Package>fr.numvision.*</Export-Package>
<Private-Package>!fr.numvision.*,*</Private-Package>
</instructions>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>

</configuration>
</plugin>
</plugins>
</build>
</project>



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