EclipseLink: How to set SLF4J logger for eclipselink 2.7.0

Question

Bundle org.eclipse.persistence.extension_2.7.0.qualifier.jar (which I install to osgi framework) contains class org.eclipse.persistence.logging.slf4j.SLF4JLogger. In my persistence file I have

<property name="eclipselink.logging.logger" value="org.eclipse.persistence.logging.slf4j.SLF4JLogger"/>

But I get

Exception Description: ClassNotFound: [org.eclipse.persistence.logging.slf4j.SLF4JLogger] specified in [eclipselink.logging.logger] property.
Internal Exception: java.lang.ClassNotFoundException: org.eclipse.persistence.logging.slf4j.SLF4JLogger not found by org.eclipse.persistence.jpa [11]
    at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:231)
    ... 36 more
Caused by: Exception [EclipseLink-28006] (Eclipse Persistence Services - 2.7.0.qualifier): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: ClassNotFound: [org.eclipse.persistence.logging.slf4j.SLF4JLogger] specified in [eclipselink.logging.logger] property.
Internal Exception: java.lang.ClassNotFoundException: org.eclipse.persistence.logging.slf4j.SLF4JLogger not found by org.eclipse.persistence.jpa [11]
    at org.eclipse.persistence.exceptions.EntityManagerSetupException.classNotFoundForProperty(EntityManagerSetupException.java:135)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.findClassForPropertyInternal(EntityManagerSetupImpl.java:1341)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.findClassForProperty(EntityManagerSetupImpl.java:1327)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.updateLoggers(EntityManagerSetupImpl.java:1202)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1752)
    ... 34 more
Caused by: java.lang.ClassNotFoundException: org.eclipse.persistence.logging.slf4j.SLF4JLogger not found by org.eclipse.persistence.jpa [11]
    at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1574)
    at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:79)
    at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:2018)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.getClassForName(PrivilegedAccessHelper.java:165)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.findClass(EntityManagerSetupImpl.java:1319)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.findClassForPropertyInternal(EntityManagerSetupImpl.java:1337)
    ... 37 more

I've checked bundle org.eclipse.persistence.extension_2.7.0.qualifier.jar doesn't export package org.eclipse.persistence.logging.slf4j So, could anyone please explain how to make eclipselink to log in slf4j?

Answer 1

Make sure you include the "org.eclipse.persistence.extension" Jar, and it should work fine. The Maven coordinates I've used are:

  <dependency>
     <groupId>org.eclipse.persistence</groupId>
     <artifactId>org.eclipse.persistence.extension</artifactId>
     <version>2.7.2</version>
     <scope>runtime</scope>
  </dependency>

Here is the SLF4JLogger source code.

Must set the eclipselink.logging.logger EclipseLink property to SLF4JLogger's fully qualified class name (i.e., org.eclipse.persistence.logging.slf4j.SLF4JLogger in version 3.0.4).