[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-1925) ClassCastException problem with reading working memory using ObjectInputStream

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-1925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor resolved JBRULES-1925.
-----------------------------------

    Resolution: Done


No one has come back to say if these are still issues in 5.x. Closing for now. Re-open with test case for 5.x if it still fails.

> ClassCastException problem with reading working memory using ObjectInputStream
> ------------------------------------------------------------------------------
>
>                 Key: JBRULES-1925
>                 URL: https://issues.jboss.org/browse/JBRULES-1925
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.0.7
>         Environment: JDK 1.5.0_11
>            Reporter: Przemyslaw Rozycki
>            Assignee: Mark Proctor
>              Labels: classcastexception, rete, session, stateful, statefulsession, workingmemory
>             Fix For: 5.2.0.M1
>
>         Attachments: DroolsTest5.java
>
>
> I experienced the problem while reading WorkingMemory using ObjectInputStream.
> Here is the code:
> public class DroolsTest5 {
> 	public static void main(String[] args) {
> 		Properties props = new Properties();
> 		props.setProperty("file", "<<place a path to any working DRL here>>");
> 		
> 		RuleAgent ruleAgent = RuleAgent.newRuleAgent(props);
> 		
> 		Fact fact1 = new Fact("a","b");
> 		
> 		RuleBase ruleBase = ruleAgent.getRuleBase();
> 		WorkingMemory baseWm = ruleBase.newStatefulSession(false);
> 		baseWm.insert(fact1);
> 		
> 		Iterator iter1 = baseWm.iterateObjects();
> 		while (iter1.hasNext()) {
> 			System.out.println(iter1.next());
> 		}
> 		System.out.println("=====");
> 		
> 		try {
> 			ByteArrayOutputStream baos = new ByteArrayOutputStream();
> 			ObjectOutputStream oos = new ObjectOutputStream(baos);
> 			oos.writeObject(baseWm);
> 			oos.close();
> 			byte[] buf = baos.toByteArray();
> 			ByteArrayInputStream bais = new ByteArrayInputStream(buf);
> 			
> 			ObjectInputStream ois = new ObjectInputStream(bais);
> 			WorkingMemory wm = (WorkingMemory) ois.readObject();
> 			Iterator iter2 = wm.iterateObjects();
> 			while (iter2.hasNext()) {
> 				System.out.println(iter2.next());
> 			}
> 			System.out.println("=====");
> 		} catch (Exception e) {
> 			e.printStackTrace();
> 		}
> 	}
> 	public static class Fact implements Serializable {
> 		String name;
> 		
> 		String id;
> 		public Fact(String _name, String _id) {
> 			name = _name;
> 			id = _id;
> 		}
> 		public String getId() {
> 			return id;
> 		}
> 		public String getName() {
> 			return name;
> 		}
> 		
> 		@Override
> 		public String toString() {
> 			return "Name: " + name + ", Id: " + id;
> 		}
> 	}
> }
> And here is an exception I get:
> java.lang.ClassCastException: java.io.ObjectInputStream
>     at org.drools.reteoo.Rete$ClassObjectTypeConf.readObject(Rete.java:605)
>     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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:946)
>     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1809)
>     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
>     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
>     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>     at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1634)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
>     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
>     at org.drools.util.AbstractHashTable.readExternal(AbstractHashTable.java:66)
>     at org.drools.util.ObjectHashMap.readExternal(ObjectHashMap.java:41)
>     at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1755)
>     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1717)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>     at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1634)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
>     at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1634)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
>     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
>     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
>     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
>     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
>     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>     at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
>     at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
>     at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
>     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
>     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
>     at com.sample.DroolsTest5.main(DroolsTest5.java:52) 

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