我遇到java.lang.IllegalMonitorStateException，在第一个execLinkedOp调用中仅发生一次。我想我缺少一些Jason程序，该程序应该能够很好地同步Cartago函数。 execLinkedOp可能在其末尾重新生成了一些上下文，从而为下次调用修复了此情况。
以下论坛表示，如果缺少同步（foo）调用，则可能会发生这种问题。 http://www.jguru.com/faq/view.jsp?EID=128732
[counter] setValue invoked sucessfully! old: count(-1), received: -1 opid:opId(0,setValue,counter,robot)
[robot] New is (-1) old number is: count(-1)
[robot] Linking router and counter...
TRACE: Camel Artifact 'listenCamelRoutes' is true
DEBUG: Listening by reading the incoming queue...
DEBUG: InOpRequest received! Artifact: router, inc2
DEBUG: Adding in the inQueue: router: inc2
DEBUG: Message added in the incoming queue!
DEBUG: A message was founded in the incoming queue! Artifact:router, op:inc2, body []
DEBUG: Getting artifact id of router
DEBUG: Executing inc2 without parameters.
DEBUG: InOpRequest received! Artifact: counter, inc3
DEBUG: Adding in the inQueue: counter: inc3
DEBUG: Body received: [string...test...counter, 34]
DEBUG: Parameters details: [string...test...counter, 34]
DEBUG: Message added in the incoming queue!
DEBUG: A message was founded in the incoming queue! Artifact:counter, op:inc3, body [string...test...counter, 34]
DEBUG: Getting artifact id of counter
DEBUG: artifact name/id/type: counter/7/artifacts.Counter
DEBUG: Forwarding inc3 with following parameters: [string...test...counter, 34]
[counter] Counter:inc3 called! A tick signal is going to be send. Parameters: string...test...counter, 34
ERROR: Error on execLinkedOp with parameters!
cartago.OperationException: execLinkedOp failed java.lang.IllegalMonitorStateException
at cartago.Artifact.execLinkedOp(Artifact.java:965)
at camelartifact.CamelArtifact.receiveMsg(CamelArtifact.java:128)
at camelartifact.CamelArtifact$ReadCmd.exec(CamelArtifact.java:203)
at cartago.Artifact.await(Artifact.java:832)
at camelartifact.CamelArtifact.setListenCamelRoute(CamelArtifact.java:69)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at cartago.ArtifactOpMethod.exec(ArtifactOpMethod.java:39)
at cartago.Artifact.doOperation(Artifact.java:407)
at cartago.Artifact.access$200(Artifact.java:32)
at cartago.Artifact$ArtifactAdapter.doOperation(Artifact.java:1235)
at cartago.WorkspaceKernel.serveOperation(WorkspaceKernel.java:1045)
at cartago.WorkspaceKernel.access$000(WorkspaceKernel.java:49)
at cartago.WorkspaceKernel$EnvironmentController.run(WorkspaceKernel.java:1359)
DEBUG: Forwarding with parameters done!
DEBUG: InOpRequest received! Artifact: router, inc2
DEBUG: Adding in the inQueue: router: inc2
DEBUG: Message added in the incoming queue!
DEBUG: A message was founded in the incoming queue! Artifact:router, op:inc2, body []
最佳答案
正如Alessadro Ricci所建议的那样，您获得的每个java.lang.IllegalMonitorStateException都应取决于您试图从不属于CArtAgO的线程中调用CArtAgO /工件代码的事实。
假设您有自己的线程T（在CArtAgO外部），该线程T要访问工件A，则该A调用一些公共方法（例如，其目的是更新工件的obs状态..），然后从线程代码中进行访问。您只需致电：
art.beginExternalSession(); /* new primitive */
art.yourArtifactPublichMethod();
...
art.yourArtifactPublichMethod();
art.endExternalSession(true); /* new primitive. true = every thing was OK, false in the case of failures */
其中art是对工件Java对象的直接引用。
package c4jtest;
import cartago.*;
class ExtThread extends Thread {
private ArtifactWithExtUse art;
public ExtThread(ArtifactWithExtUse art){
this.art = art;
}
public void run(){
while (true){
try {
Thread.sleep(1000);
art.beginExternalSession();
art.externalInc();
art.endExternalSession(true);
} catch (Exception ex){
art.endExternalSession(false);
}
}
}
}
public class ArtifactWithExtUse extends Artifact {
void init(){
defineObsProperty("a",0);
new ExtThread(this).start();
}
/* ext API */
public void externalInc(){
ObsProperty prop = this.getObsProperty("a");
prop.updateValue(prop.intValue()+1);
}
@OPERATION void reset(){
ObsProperty prop = this.getObsProperty("a");
prop.updateValue(0);
}
}