I am developing a desktop app with Datanucleus and JDO for embedded H2 database. It all works fine when I run it from Eclipse, but it stops working when I try to make executable jar out of it. I get a following error:
org.datanucleus.exceptions.NucleusUserException: Persistence process has been specified to use a ClassLoaderResolver of name "jdo" yet this has not been found by the DataNucleus plugin mechanism. Please check your CLASSPATH and plugin specification.
Of course it shows that I have not configured something properly - what am I missing? If I was missing something big, it wouldn't work at all, so I am assuming it's a flawed executable jar. I have seen that error in other apps, like JPOX, where it was fixed, but without any solution given.
Whole error stacktrace:
Exception in thread "main" javax.jdo.JDOFatalInternalException: Unexpected exception caught.
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1193)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701)
at db.PersistenceManagerFilter.init(PersistenceManagerFilter.java:44)
at Main.main(Main.java:26)
NestedThrowablesStackTrace:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at javax.jdo.JDOHelper$16.run(JDOHelper.java:1965)
at java.security.AccessController.doPrivileged(Native Method)
at javax.jdo.JDOHelper.invoke(JDOHelper.java:1960)
at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1166)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808)
at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701)
at db.PersistenceManagerFilter.init(PersistenceManagerFilter.java:44)
at Main.main(Main.java:26)
Caused by: org.datanucleus.exceptions.NucleusUserException: Persistence process has been specified to use a ClassLoaderResolver of name "jdo" yet this has not been found by the DataNucleus plugin mechanism. Please check your CLASSPATH and plugin specification.
at org.datanucleus.NucleusContext.<init>(NucleusContext.java:233)
at org.datanucleus.NucleusContext.<init>(NucleusContext.java:196)
at org.datanucleus.NucleusContext.<init>(NucleusContext.java:174)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.<init>(JDOPersistenceManagerFactory.java:364)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:294)
at org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:195)
... 12 more
The line it points to is PersistenceManagerFilter init method:
pmf = JDOHelper.getPersistenceManagerFactory(getProperties());
Properties file looks like that:
javax.jdo.PersistenceManagerFactoryClass=org.datanucleus.api.jdo.JDOPersistenceManagerFactory
datanucleus.ConnectionDriverName=org.h2.Driver
datanucleus.ConnectionURL=jdbc:h2:datanucleus
datanucleus.ConnectionUserName=sa
datanucleus.ConnectionPassword=
I have all dependencies from maven, with a goal to deploy with dependencies. Dependencies are as stated on datanucleus page http://www.datanucleus.org/products/datanucleus/jdo/maven.html
Any ideas?
Adding to DataNucleus answer.
To acheave what you need you should use maven-dependency-plugin
and add following to your pom.xml
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/jars</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
Then the dependencies will be in target/jars dir.
To execute your app you use command:
Windows:
java -cp "yourFile.jar;jars/*" package.className
Linux:
java -cp "yourFile.jar:jars/*" package.className
NOTE: do not use jars/*.jar, this will not work