Can I run hibernate annotations 3 without sl4j

[Aniruddh Joshi]

Hi

I am using hibernate annotations v 3.4 and I run atest on below code-

sessionFactory = new AnnotationConfiguration().configure(confFile).buildSessionFactory();

The exception Iget is -

java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
	at org.hibernate.cfg.annotations.Version.<clinit>(Version.java:12)
	at org.hibernate.cfg.AnnotationConfiguration.<clinit>(AnnotationConfiguration.java:78)
	at ......HibernateSessionFactory.<init>(HibernateSessionFactory.java:30)
	at .....HibernateSessionFactory.getInstance(HibernateSessionFactory.java:35)
	at ....DaoImpl.<init>(...DaoImpl.java:45)
	at .....DaoImplHibernateTest.setUp(...DaoImplHibernateTest.java:35)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:73)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:46)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
	at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	... 29 more

I understand AnnotationsConfiguration usses sl4j for logging -

  // Field descriptor #383 Lorg/slf4j/Logger;
  private org.slf4j.Logger log;

Can i configure it to use log4j ?
Is it mandatory to add sl4j ?

[Bill Gorder]

I am moving this topic to our Other Open Source Projects forum as this question relates to logging frameworks more than ORM.

[Bill Gorder]

sl4j is a logging abstraction it is not a logging framework. You can use whatever logging framework you would like but you must have sl4j on the classpath. If this is a new project I would recommend using Logback over log4j but either work with sl4j.

Here is a post where a portion discusses configuring sl4j and logback.

http://gordondickens.com/wordpress/2012/07/03/enterprise-spring-best-practices-part-1-project-config/#logging


here is a post describing lo4j with sl4j
http://www.mkyong.com/hibernate/how-to-configure-log4j-in-hibernate-project/


Conflicting versions of sl4j on the classpath will cause issues as well. The first link I posted shows how you can use the maven enforcer plugin to help with this.