Hi Cayenne Experts, Currently I have been hitting with a problem of ClassCastException in my first JPA program of Geronimo/Caynne integration. I am unable to find out the exact problem since my knowledge of Cayenne architecture is pretty low. In the Geronimo side following is the line it gives this problem.
Class clazz = classLoader.loadClass(persistenceProviderClassName); PersistenceProvider persistenceProvider = (PersistenceProvider)clazz.newInstance(); //here is the CCE Exception In Eclipse remote debugging enviroment it comes to Cayenne Provider class and it finishes default constructor without any errors. Does the Cayenne do anyting after creating the Provider instance when it comes to a server enviroment? I split two statements investigate more and list the interfaces in clazz variable. It lists PersistenceProvider interface correctly too. So I am wondering where is CCE occurs. I attached the error below but it doesn't give that much information. Any help please ... Additionally I didn't add any properties in persitence.xml file. I want to use Derby database to save JPA object too. Do I need to set org.apache.cayenne.jpa.jpaDataSourceFactory property, then what is the value it should be? <persistence xmlns="http://java.sun.com/xml/ns/persistence"; version="1.0"> <persistence-unit transaction-type="RESOURCE_LOCAL" name="openjpa-itest"> <provider>org.apache.cayenne.jpa.Provider</provider> <class>org.apache.geronimo.itest.jpa.AllFieldTypes</class> <exclude-unlisted-classes/> <properties> <!-- <property name="org.apache.cayenne.jpa.jpaDataSourceFactory" value=""/> --> </properties> </persistence-unit> </persistence> Thanks, Lasantha Ranaweera java.lang.ClassCastException: org.apache.cayenne.jpa.Provider at org.apache.geronimo.persistence.PersistenceUnitGBean.<init>(PersistenceUnitGBean.java:102) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:494) at org.apache.geronimo.gbean.runtime.GBeanInstance.createInstance(GBeanInstance.java:936) at org.apache.geronimo.gbean.runtime.GBeanInstanceState.attemptFullStart(GBeanInstanceState.java:267) at org.apache.geronimo.gbean.runtime.GBeanInstanceState.start(GBeanInstanceState.java:102) at org.apache.geronimo.gbean.runtime.GBeanInstanceState.startRecursive(GBeanInstanceState.java:124) at org.apache.geronimo.gbean.runtime.GBeanInstance.startRecursive(GBeanInstance.java:543) at org.apache.geronimo.kernel.basic.BasicKernel.startRecursiveGBean(BasicKernel.java:379) at org.apache.geronimo.kernel.config.ConfigurationUtil.startConfigurationGBeans(ConfigurationUtil.java:434) at org.apache.geronimo.kernel.config.KernelConfigurationManager.start(KernelConfigurationManager.java:188) at org.apache.geronimo.kernel.config.SimpleConfigurationManager.startConfiguration(SimpleConfigurationManager.java:527) at org.apache.geronimo.kernel.config.SimpleConfigurationManager.startConfiguration(SimpleConfigurationManager.java:508) at org.apache.geronimo.kernel.config.SimpleConfigurationManager$$FastClassByCGLIB$$ce77a924.invoke(<generated>) at net.sf.cglib.reflect.FastMethod.invoke(FastMethod.java:53) at org.apache.geronimo.gbean.runtime.FastMethodInvoker.invoke(FastMethodInvoker.java:38) at org.apache.geronimo.gbean.runtime.GBeanOperation.invoke(GBeanOperation.java:127) at org.apache.geronimo.gbean.runtime.GBeanInstance.invoke(GBeanInstance.java:855) at org.apache.geronimo.kernel.basic.BasicKernel.invoke(BasicKernel.java:239) at org.apache.geronimo.kernel.KernelGBean.invoke(KernelGBean.java:342) at org.apache.geronimo.kernel.KernelGBean$$FastClassByCGLIB$$1cccefc9.invoke(<generated>) at net.sf.cglib.reflect.FastMethod.invoke(FastMethod.java:53) at org.apache.geronimo.gbean.runtime.FastMethodInvoker.invoke(FastMethodInvoker.java:38) at org.apache.geronimo.gbean.runtime.GBeanOperation.invoke(GBeanOperation.java:127) at org.apache.geronimo.gbean.runtime.GBeanInstance.invoke(GBeanInstance.java:855) at org.apache.geronimo.kernel.basic.BasicKernel.invoke(BasicKernel.java:239) at org.apache.geronimo.system.jmx.MBeanGBeanBridge.invoke(MBeanGBeanBridge.java:168) at com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(DynamicMetaDataImpl.java:213) at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(MetaDataImpl.java:220) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:815) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:784) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1408) at javax.management.remote.rmi.RMIConnectionImpl.access$100(RMIConnectionImpl.java:81) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1245) at java.security.AccessController.doPrivileged(Native Method) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1348) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:782) 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:585) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294) at sun.rmi.transport.Transport$1.run(Transport.java:153) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:149) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707) at java.lang.Thread.run(Thread.java:595)
