I use a Ruleagent with the following params
(rules.properties):
localCacheDir=…
url=…
poll=30
name=eventexpertrules
Here is my session initialization:
RuleAgent agent =
RuleAgent.newRuleAgent("/rules.properties");
RuleBase retValue = agent.getRuleBase();
final RuleBase ruleBase = agent.getRuleBase();
session = ruleBase.newStatefulSession();
DroolsLogger drlogger = new DroolsLogger(session); // add
logger
//Insert Event Processor Instance as global
session.setGlobal("processor", this);
Here is the stack trace of the thread that updates the rule base
"Timer-2" daemon prio=3 tid=0x0000000002356800 nid=0x24
waiting for monitor entry [0xfffffd7fe28b7000..0xfffffd7fe28b7a20]
java.lang.Thread.State: BLOCKED (on object monitor)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:433)
- waiting to lock <0xfffffd7feb474680> (a
org.drools.reteoo.ReteooStatefulSession)
at
org.drools.base.FireAllRulesRuleBaseUpdateListener.beforeRuleBaseUnlocked(FireAllRulesRuleBaseUpdateListener.java:29)
at
org.drools.event.RuleBaseEventSupport.fireBeforeRuleBaseUnlocked(RuleBaseEventSupport.java:168)
at
org.drools.common.AbstractRuleBase.unlock(AbstractRuleBase.java:351)
at org.drools.agent.PackageProvider.applyChanges(PackageProvider.java:73)
at
org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:320)
at
org.drools.agent.RuleAgent$2.run(RuleAgent.java:438)
at
java.util.TimerThread.mainLoop(Timer.java:512)
at
java.util.TimerThread.run(Timer.java:462)
Here is the stack trace of my application
that basically inserts facts and fires rules …
"ActiveMQ Session Task" daemon
prio=3 tid=0x0000000002564400 nid=0x142e in Object.wait() [0xfffffd7fe01dd000..0xfffffd7fe01ddaa0]
java.lang.Thread.State:
WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0xfffffd7feb49a9e0> (a
org.drools.util.concurrent.locks.ReentrantLock$NonfairSync)
at java.lang.Object.wait(Object.java:485)
at
org.drools.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:106)
- locked <0xfffffd7feb49a9e0> (a
org.drools.util.concurrent.locks.ReentrantLock$NonfairSync)
at org.drools.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:195)
at
org.drools.common.AbstractWorkingMemory.getGlobal(AbstractWorkingMemory.java:397)
at
com.daxtechnologies.optima.fault.eventprocessor.Rule_EventForwarder_0ConsequenceInvoker.evaluate(Unknown
Source)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:550)
- locked <0xfffffd7feb49a3f8> (a org.drools.common.DefaultAgenda)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:514)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:471)
- locked <0xfffffd7feb474680>
(a org.drools.reteoo.ReteooStatefulSession)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:433)
- locked <0xfffffd7feb474680> (a
org.drools.reteoo.ReteooStatefulSession)
at
com.daxtechnologies.optima.fault.eventprocessor.fault.level2.maps.EventExpertProcessor.processEventVO(EventExpertProcessor.java:147)
- locked <0xfffffd7feb474a18> (a
com.daxtechnologies.optima.fault.eventprocessor.fault.level2.maps.EventExpertProcessor)
at
com.daxtechnologies.optima.fault.eventprocessor.fault.level2.maps.EventExpertProcessor.doProcessEvent(EventExpertProcessor.java:70)
As you see both threads wait for something…
thanks
--zoly