[jboss-jira] [JBoss JIRA] Created: (JBRULES-1211) Rules with accumulators cannot be serialized

[Laszlo Muller (JIRA)]

Rules with accumulators cannot be serialized
--------------------------------------------

                 Key: JBRULES-1211
                 URL: http://jira.jboss.com/jira/browse/JBRULES-1211
             Project: JBoss Rules
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Drl Parser/Builder
    Affects Versions: 4.0.1
            Reporter: Laszlo Muller
         Assigned To: Mark Proctor


If a rulesbase includes a max accumulator then it cannot be serialized. The org.drools.base.accumulators.AccumulateFunction interface does not extend Serializable and none of its default implementations implement it either.

When you try to serialize such a Package you get the following exception:
java.io.NotSerializableException: org.drools.base.accumulators.MaxAccumulateFunction
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
        at java.util.HashMap.writeObject(HashMap.java:980)
        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:324)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:809)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1296)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
        at org.drools.rule.PackageCompilationData.writeExternal(PackageCompilationData.java:116)
        at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1267)
        ...

Paragraph 7.1.4.4. of the documentation clearly states that packages should be serializable.

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