Hi Drools Team, I am trying out new Serialization technique introduced in Drools 5.0 using " org.drools.marshalling.DefaultMarshaller". The use case I am trying, is: Create a Stateful session. Then Serialize that. Try to load the the serialized session back. Loading of serialized session is working good if, I try that in same java program & same object of DefaultMarshaller is used during serialization & de serialization of the Stateful session. But, when I tried a different instance of DefaultMarshaller to read back the saved session, that is not working anymore. I am getting a exception : java.lang.NullPointerException at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:78) at org.drools.marshalling.InputMarshaller.readFactHandle(InputMarshaller.java:331) at org.drools.marshalling.InputMarshaller.readFactHandles(InputMarshaller.java:277) at org.drools.marshalling.InputMarshaller.readSession(InputMarshaller.java:179) at org.drools.marshalling.DefaultMarshaller.read(DefaultMarshaller.java:58) at org.drools.marshalling.DefaultMarshaller.read(DefaultMarshaller.java:15) at org.drools.reteoo.ReteooRuleBase.readStatefulSession(ReteooRuleBase.java:277) at org.drools.common.AbstractRuleBase.readStatefulSession(AbstractRuleBase.java:321) at com.sample.test.NewMarshallingTest.testSerializationInFile_1(NewMarshallingTest.java:79) 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 junit.framework.TestCase.runTest(TestCase.java:154) at junit.framework.TestCase.runBare(TestCase.java:127) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:118) at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196) With Drools 4.0.7 ... I can serialize a Stateful session & at later point of time I can deserialize that back. For our usecase, the feature is very critical. Does Drools 5.0 support that ? DefaultMarshaller is not serializable. So once a Stateful session is serialized. At Later point of time, I am not able to read that back. I have attached my test files. Best Regards! Siddhartha _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Siddhartha Banik wrote: > Hi Michal, > > Thanks for your reply. > I have got a better idea about marshalling now. After I have made the > changes you suggested, the things are working now. > > There is a bug in "SerializablePlaceholderResolverStrategy.java" file > Line#38. Recursive call is made inside the method "public boolean > accept(Object object)" . So marshalling is failing with > stackOverflowError. > I think that is fixed... This is what I have in trunk: public boolean accept(Object object) { return acceptor.accept( object ); } Doesn't look recursive to me. > The blog > "http://blog.athico.com/2008/05/efficient-binary-protocol-marshalling.html" > says : > > It's still very alphaware. The following types don't yet marshall, not > sure > how to handle date/time stuff at the moment. Implementations have not > been > added for accumulate, collect, from and rightinputadapter. > > If these issues are fixed in Drools 5.0 M2 release? > > Best Regards! > Siddhartha > > > Siddhartha Banik wrote: > >> Hi Drools Team, >> >> I am trying out new Serialization technique introduced in Drools 5.0 >> using >> " >> org.drools.marshalling.DefaultMarshaller". >> >> The use case I am trying, is: >> Create a Stateful session. >> Then Serialize that. >> Try to load the the serialized >> session >> back. >> >> Loading of serialized session is working good if, I try that in same >> java >> program & same object of DefaultMarshaller is used during serialization >> & >> de >> serialization of the Stateful session. >> >> But, when I tried a different instance of DefaultMarshaller to read back >> the >> saved session, that is not working anymore. I am getting a exception : >> >> java.lang.NullPointerException >> at >> org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:78) >> at >> org.drools.marshalling.InputMarshaller.readFactHandle(InputMarshaller.java:331) >> at >> org.drools.marshalling.InputMarshaller.readFactHandles(InputMarshaller.java:277) >> at >> org.drools.marshalling.InputMarshaller.readSession(InputMarshaller.java:179) >> at >> org.drools.marshalling.DefaultMarshaller.read(DefaultMarshaller.java:58) >> at >> org.drools.marshalling.DefaultMarshaller.read(DefaultMarshaller.java:15) >> at >> org.drools.reteoo.ReteooRuleBase.readStatefulSession(ReteooRuleBase.java:277) >> at >> org.drools.common.AbstractRuleBase.readStatefulSession(AbstractRuleBase.java:321) >> at >> com.sample.test.NewMarshallingTest.testSerializationInFile_1(NewMarshallingTest.java:79) >> 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 junit.framework.TestCase.runTest(TestCase.java:154) >> at junit.framework.TestCase.runBare(TestCase.java:127) >> at junit.framework.TestResult$1.protect(TestResult.java:106) >> at junit.framework.TestResult.runProtected(TestResult.java:124) >> at junit.framework.TestResult.run(TestResult.java:109) >> at junit.framework.TestCase.run(TestCase.java:118) >> at >> org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130) >> at >> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196) >> >> With Drools 4.0.7 ... I can serialize a Stateful session & at later >> point >> of >> time I can deserialize that back. For our usecase, the feature is very >> critical. >> >> Does Drools 5.0 support that ? DefaultMarshaller is not serializable. >> So >> once a Stateful session is serialized. At Later point of time, I am not >> able to read that back. >> >> I have attached my test files. >> >> >> Best Regards! >> Siddhartha >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users