[rules-users] Serialization in Drools 5.0 M2

[Siddhartha Banik]

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.(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

http://www.nabble.com/file/p20309577/TestFiles.zip TestFiles.zip 

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