Continuous event queue ?

Hi,
I'm using LV6.1 and I got a little problem with events. How do I make a continuous event queue for activex component, that means LV will respond every time when mentioned event fires instead of it responds just once. Does anyone have an example ?
Thanks in advance!

It seems silly to even use two loops:
If you require two loops and want to use an event structure (maybe the rest of the code requires it), you can manipulate the event timeout, e.g. as follows.
Message Edited by altenbach on 09-13-2006 01:45 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
UpdateB.png ‏3 KB
updateB_2.png ‏22 KB

Similar Messages

Specifying Event Queue for EventQueue.invokeAndWait().

Javadoc says EventQueue.invokeAndWait(Runnable runnable) / invokeLater are static methods causing the Runnable executed in the system event queue thread. But I found that my applet appli. running under IE has 3 event dispatching threads AWT-EventQueue-0, AWT-EventQueue-1 and AWT-EventQueue-2. The system event queue (the one returned by Toolkit.getSystemEventQueue() ) is inside AWT-EventQueue-0 but by testing my applet's event queue should be in AWT-EventQueue-2.
My question is, is it possible to specify which event queue's thread to run the Runnable? Since I found that the 3 event dispatching threads are of different thread groups and only the AWT-EventQueue-2 is in the same thread group as my applet and I want my Runnable to be in the same thread group of my applet thread. The thread groups of the 3 dispatching threads are :
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1.
thread name:Thread[AWT-EventQueue-0,6,main]
thread group class name:java.lang.ThreadGroup
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Please continue in [the thread where you first posted this problem|http://forums.sun.com/thread.jspa?threadID=5431496]. I'm locking this.
db
edit Thread unlocked on clarification from OP in the other thread.
Edited by: DarrylBurke

After all event queue be empty

Hello everyone,
I know events are added to event queue from application thread or background thread (using Platfrom.runlater() ) . but I find out when some events add to event queue , UI dosent upadate until the event queue be empty (all events be handled ). My question is what object update UI after all event handled and more information about it .
thanks

Hi,
QUEUE_NOT_EMPTY--> There are incompletely processed OCS requests in the tp buffer.
Use the following tp command to display these requests-->
tp SHOWBUFFER <SID> -D SOURCESYSTEMS= TAG=SPAM
You can continue processing the queue as soon as these requests have been processed completely, or deleted from the tp buffer.
http://help.sap.com/saphelp_nw04/helpdata/en/7e/c6c2ad98a711d2b429006094b9ea64/content.htm
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCUPGOCSSPAM/BCUPGOCSSPAM.pdf
you probably forgot to confirm last SPAM or SAINT application.
go into SPAM and choose CONFIRM
go into SAINT, and choose FINISH
OR
It appears that already some support pack update is in process. So check tcode SPAM or SAINT and see whether anything is running.If it is running wait for it or see whether it is asking for confirmation.. then u need to confirm the queue.
Also you can go to tcode SPAM and see display/define tab and see whether anything is available over there..if you are sure u dont want to import the ones in the queue,then just delete the queue using trash icon over there..
Regards,
Srini Nookala

Flushing the Event Queue

I need to go through the System Event Queue (reached by calling Toolkit.getSystemEventQueue()) and run all the registered listeners for each of these events. I need to do this in the event dispatcher thread, so it will wait until all the events have been flushed, and then continue normal execution.
I can't find a way to do this... Any suggestions?

I am not sure how you would be able to do whay you described, however, you can ensure that code gets executed after all of the event currently in the queue by placing the code into the run method of a Runnable object and passing that object to the SwingUtilities.invokeLater(Runnable) method. This will queue an event and when the event is processed, the run method of the runnable will be executed. Maybe that will serve your purposes.
E. West

Error while deleting events from the integration event queue

I am trying to delete all the events from the integration event queue after reading it, like this (this is in Java):
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Invalid method parameter(s): 'File Id'(SBL-ODS-50007)What does this mean? What is this mysterious "File Id" it supposedly gets? I don't see it anywhere in the SOAP message I'm sending and it isn't mentioned anywhere in the docs.
Thanks in advance for any input.

Dont keep this attributes null
input.setDateTime(""); //Put a Default Time way in
the past. Ex:"1/1/2000"
input.setLastEventId(""); //pass the eventIdThe documentation states that those two are optional (although they are not nillable, for some reason). I tried to set the date to today, but I got the same result. Since setting a date is supposed to delete all events older than that date, I don't think setting it in the past will delete anything.

Workflow in event queue based on a deleted object

Hi all,
I'm facing a problem with a workflow that goes to the event queue, meanwhile the object is deleted and then the WF is released from the event queue in Error. The WF is based on the BO BUS2032 (sales order).
Here are the steps:
1-Sales order created or changed --> event generated --> WF linked to that event goes to event queue
2-Meanwhile the WF is the event queue waiting to be released, the sales order is deleted
3-The WF is released from the event queue but in ERROR status (this is because the BO instance does not exist anymore)
In this scenario, is there a way to end the WF with CANCELLED status instead of ERROR? is there anyy FM or exit you know ehere I can check if the BO still exists once the WF is released from the event queue?
Thanks!!!!!

Some questions/options:
1) How/why does the WF go into an error exactly? Does it try to complete the first step? What if you put a condition step as a first step in the WF and check whether the object is initial and if it is, then cancel the workflow.
2) How about deleting the event from the queue from some user-exit/badi in the sales order deletion. If I remember correctly the events when queued are in table SWEQUEUE. Probably you can find some function to delete events from the queue. Take a look for example function SWE_EVENT_QUEUE_DELETE to see the idea. Or take a look into transaction SWEAD. There you can delete events from queue. Check what it does and do the same in your code.
3) Is this really a big problem? Are there so many sales orders deleted?
In general I think that the whole event queue seems to many times cause lots of problems (the event queue job disappears, WFs will not get started, and whatever.). I try to avoid using it.
Regards,
Karri

Flush Event Queue doesn't work with "Key up"

Hi,
probably just a simple thing I am missing here. See the attached VI (including SubVI). In case 1 I fetch the Key Up event for ENTER and issue a Value Change on the Stop Button. This results in a check for the string length and in case it is too short brings up a dialog telling you the ID string is too short and brings you back to the ID entry. Unfortunately - when confirming the dialog with ENTER instead of using the mouse on the button theKey Up event fired again and therefore fetched by the Event Structure.
So I thought I just flush all events in the queue. To be sure, I put a time value on the flush function which proceeds AFTER the dialog is completed, so the ENTER Key Up should be deleted as well. Bummer is - it doesn't work. Anyone know why?
I tried as well with the dynamic event, which I unregistered right after the Stop Event is issued in the Key Up case. I then "re"register for the Key Up event at the same time/position as the flush event queue function is positioned now in the VI below. Still no joy.
What is my mistake? Thanks a lot.
Solved!
Go to Solution.
Attachments:
Manual_ID_Entry.llb ‏47 KB

comrade wrote:
I don't understand 2 things:
a) Why is the Key up event even fired? It doesn't come from the VI where the event structure resides and to which "Instance" the event is bound (VI->Key up), but from the dialog box (which is a different VI). Unless a calling VI inherits all events from its SubVIs or something like that.
b) Why isn't the event fired by the button in the dialog box discarded as the flush event queue function is supposed to perform?
Because you are slow. Not you personally. But compared to the computer, you just don't stand a chance. So you hit the Enter button on the dialog. That dialog's OK button activates on the key down. So the dialog is long gone by the time you manage to get your finger off of the Enter key. In fact, you loop should be back around to be waiting for an event first. So it is waiting for an event when you finally get your finger off of the button. Hey, we have a Key Up event!
Your current checking for the validity of the id is just flat out annoying. Use the Key Down? event to check for a valid character being entered. Notice the '?' in my choice of event there? That means it is a filter event. This means you can throw away (discard) the character being pressed before the control even sees it. You could also discard if there are already enough characters (Greater Or Equal, not Equal).
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Error "Event Queue Overflowed" with the "Write file to Citadel Server"

Hello,
I can import data from a file and I can see the data
in the historical database without troubling.
But I always have this error "Event Queue Overflowed", that don't perturb my data and my application (I have just this boring message).
I have tried many things :
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- increasing the File_location tag size (-> 260). No change.
- My write to Citadel.cfg is in the LabVIEW folder.
Can you help me ?
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Hi,
What version of LabVIEW DSC are you using? if it is 6.1, have you applied fixes linked below.
http://digital.ni.com/softlib.nsf/websearch/513AA4A0BB60D10086256B48006D44B5?opendocument
I have seen a similar issue at the link below.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=5065000000080000008C640000&ECategory=LabVIEW.Datalogging+and+Supervisory+Control
Please let me know if you have read it through?
Best Regards,
Remzi A.

What is Event queue problem?

HI,
I have come across JSF document, they mentioned that Event queue
Problem ins SUN's JSF implementation. what is that?

You're going to have to be a little more specific.

Terminating Event to Event Queue due to Work Item Lock

I have a dialog workflow task based on an asynchronous method defined with a terminating event. When the user executes the work item, the method generates the terminating event (via a V2 change document) but the work item is enqueued (locked) by the same user (locked when they execute the work item from SBWP) and therefore the terminating event goes into error and is placed in the event queue. The background job which processes the event queue does not redeliver the event so it stays in the event queue and the work item fails to complete. Other than dequeing the work item lock myself with a function call how do I get around this catch 22?

Hello Martin,
Actually, the locking happens whether I have the task as asynchronous or synchronous. The problem is the timing. If the user does not release the lock (by backing out of the dialog which is executed) prior to the terminating event attempting to enqueue and complete the work item then the event goes into error and is inserted into the event queue (and lingers there indefinitely, almost). Another issue with the asynchronous approach is that even if the user backs out of the dialog before the event actually attempts to complete the work item they will still see the work item in the inbox unless they click the refresh button when they get back to the inbox.
I have changed the task to synchronous but here is my scenario and another question.
The process being workflowed is the approval of service entrysheets (similar to an invoice if you are not familiar with External Services). In our process, there are a large number of documents being created and requiring approval by particular approvers. It is a normal scenario for an approver to have, lets say 25 documents in his inbox awaiting approval. It was not practical for him to have to navigate back and forth between his inbox and the approval task screen. Therefore, I give the users the option of (when executing a work item) having all the documents in his in-box (for this particular task) be presented in an approval list screen. They can then do a mass approval of the 25 documents with 1 click and 1 navigation. This list screen is also available to be executed outside workflow via a tcode. So, when the user executes the mass approval (either from the inbox or outside workflow) the work items are terminated via the terminating event assigned to the approval task.
A couple of issues remaining:
1) Given my example of 25 work items (user executes 1 work item from in-box
and I displayed all 25) being approved, when the user returns to the in-box, the 24
items remain in his inbox until he clicks the refresh button since these were not actually "executed" from the workflow engines point of view. However, these were terminated successfully because they were not "locked".
<b>Question:</b> Is there a way (user exit?) to trigger the inbox refresh automatically.
2) Now, the issue with the actual work item which the user executes from the inbox. As I mentioned, the work item is locked as soon as the user executes it and is not released until they back out of the dialog or logoff. So, here is what happens: If the terminating event is sent before the lock is released the event is sent to the event queue. If they then back out back to the in-box, its OK since I put some code in the SWO1 object type program (rememeber, its now synchronous) which will determine if they did the approval/rejection and the work item will complete and the event in the event queue will be deleted the next time the Event Queue Background job runs (it deletes any events for work items already in COMPLETED status). However, lets say they simply log off rather than backing up to the in-box or they don't do anything and are eventually logged off by timeout. In this case the code in the object type program to determine if the approval/rejection was done does not get executed (control does not return to the object type program) and the work item remains in "STARTED" status and remains in the users inbox and the event is in the event queue. So, now we have a work item that should be completed still sitting in the users in-box and the terminating event in the event queue. So the next time the user goes to their inbox the work item is still there. The interesting thing is that though this may be confusing to the user, if they then attempt to execute the work item, they will get a message: "Work item currently being completed by event" (Message SWF_RUN 644) and the event sitting in the event queue gets redelivered and completes the work item. To alleviate this problem I was thinking of adding a call to SAP_WAPI_WORKITEM_COMPLETE in the approval list screen after they do the approval but I'm guessing it wont work since it probably will try to enqueue the work item and it will still be locked.
Hopefully you haven't nodded off reading this rambling note...
Thank you,
Bob

Seeing " Warning The event queue appears to be stuck."

I'm seeing some strange things since I changed to v3.6.1. Could be due to other changes made at roughly the same time but I suspect it's the new jars. I was reading what Patrick wrote here:
http://blackbeanbag.net/wp/2009/07/20/coherence-3-5-service-guardian-deadlock-detection/...and I'm wondering now if my app is just not keeping up with the flow of events...?
Thanks,
Andrew
2010-12-15 14:34:08.609/26.953 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:08.609/26.953 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:08.609/26.953 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:08.609/26.953 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:08.984/27.328 Oracle Coherence GE 3.6.1.0 <Warning> (thread=AWT-EventQueue-0, member=34): The event queue appears to be stuck.
2010-12-15 14:34:08.984/27.328 Oracle Coherence GE 3.6.1.0 <Error> (thread=AWT-EventQueue-0, member=34): Full Thread Dump
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     sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
     sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
     java.io.InputStreamReader.read(InputStreamReader.java:167)
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     java.io.BufferedReader.read1(BufferedReader.java:187)
     java.io.BufferedReader.read(BufferedReader.java:261)
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     java.lang.Object.wait(Native Method)
     com.tangosol.coherence.component.util.Daemon.onWait(Daemon.CDB:18)
     com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onWait(Grid.CDB:6)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:39)
     java.lang.Thread.run(Thread.java:619)
Thread[EventQueue:ContinuousQueryCache{Cache=stats._1_DAY_PERCENT_CHANGED, Filter=AlwaysFilter},5,EventQueue:ContinuousQueryCache{Cache=stats._1_DAY_PERCENT_CHANGED, Filter=AlwaysFilter}]
     java.lang.Object.wait(Native Method)
     java.lang.Object.wait(Object.java:485)
     com.tangosol.util.TaskDaemon.takeNextRipeTask(TaskDaemon.java:345)
     com.tangosol.util.TaskDaemon.run(TaskDaemon.java:103)
     com.tangosol.util.Daemon$DaemonWorker.run(Daemon.java:781)
     java.lang.Thread.run(Thread.java:619)
Thread[PacketListenerN,8,Cluster]
     java.net.PlainDatagramSocketImpl.receive0(Native Method)
     java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
     java.net.DatagramSocket.receive(DatagramSocket.java:712)
     com.tangosol.coherence.component.net.socket.UdpSocket.receive(UdpSocket.CDB:22)
     com.tangosol.coherence.component.net.UdpPacket.receive(UdpPacket.CDB:1)
     com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketListener.onNotify(PacketListener.CDB:20)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     java.lang.Thread.run(Thread.java:619)
Thread[Cluster|Member(Id=34, Timestamp=2010-12-15 14:34:28.185, Address=192.168.3.26:8088, MachineId=27418, Location=machine:dab1,process:4020,member:s1, Role=BboBBOClientMain),6,Cluster]
     sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
     sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(WindowsSelectorImpl.java:273)
     sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(WindowsSelectorImpl.java:255)
     sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:136)
     sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
     sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
     com.tangosol.coherence.component.net.TcpRing.select(TcpRing.CDB:11)
     com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.ClusterService.onWait(ClusterService.CDB:6)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:39)
     java.lang.Thread.run(Thread.java:619)
Thread[threadAutoRefreshBBO,5,main]
     java.lang.Thread.sleep(Native Method)
     bbo.BBORecordsModel$1.run(BBORecordsModel.java:152)
     java.lang.Thread.run(Thread.java:619)
Thread[PacketListener1,8,Cluster]
     java.net.PlainDatagramSocketImpl.receive0(Native Method)
     java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
     java.net.DatagramSocket.receive(DatagramSocket.java:712)
     com.tangosol.coherence.component.net.socket.UdpSocket.receive(UdpSocket.CDB:22)
     com.tangosol.coherence.component.net.UdpPacket.receive(UdpPacket.CDB:1)
     com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketListener.onNotify(PacketListener.CDB:20)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     java.lang.Thread.run(Thread.java:619)
Thread[testAOrderRepositoryBinaryThread,5,main]
     java.lang.Object.wait(Native Method)
     java.lang.Object.wait(Object.java:485)
     testAbook.binary.common.testAOrderRepositoryBinary$1.run(testAOrderRepositoryBinary.java:47)
     java.lang.Thread.run(Thread.java:619)
Thread[Reference Handler,10,system]
     java.lang.Object.wait(Native Method)
     java.lang.Object.wait(Object.java:485)
     java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
Thread[Thread-16,5,main]
     java.lang.Thread.sleep(Native Method)
     bbo.udp.BBOUDPRecords.refreshBBOUDP(BBOUDPRecords.java:299)
     bbo.udp.BBOUDPRecordsModel.refreshBBOUDP(BBOUDPRecordsModel.java:90)
     bbo.udp.BBOUDPRecordsModel$1.run(BBOUDPRecordsModel.java:107)
     java.lang.Thread.run(Thread.java:619)
Thread[testASocketToServerThread3,5,main]
     java.net.SocketOutputStream.socketWrite0(Native Method)
     java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
     java.net.SocketOutputStream.write(SocketOutputStream.java:136)
     sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
     sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
     sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:276)
     sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122)
     java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212)
     java.io.BufferedWriter.flush(BufferedWriter.java:236)
     testAbook.binary.client.testASocketToServerBinary$3.run(testASocketToServerBinary.java:248)
     java.lang.Thread.run(Thread.java:619)
Thread[Attach Listener,5,system]
Thread[DistributedCache:DistributedQuotesCacheService:EventDispatcher,6,Cluster]
     quoteclient.QuoteClient.p(QuoteClient.java:48)
     quoteclient.QuoteClient.entryUpdated(QuoteClient.java:95)
     com.tangosol.util.MapEvent.dispatch(MapEvent.java:270)
     com.tangosol.util.MapEvent.dispatch(MapEvent.java:226)
     com.tangosol.util.MapListenerSupport.fireEvent(MapListenerSupport.java:556)
     com.tangosol.coherence.component.util.SafeNamedCache.translateMapEvent(SafeNamedCache.CDB:7)
     com.tangosol.coherence.component.util.SafeNamedCache.entryUpdated(SafeNamedCache.CDB:1)
     com.tangosol.util.MapEvent.dispatch(MapEvent.java:270)
     com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$ViewMap$ProxyListener.dispatch(PartitionedCache.CDB:22)
     com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$ViewMap$ProxyListener.entryUpdated(PartitionedCache.CDB:1)
     com.tangosol.util.MapEvent.dispatch(MapEvent.java:270)
     com.tangosol.coherence.component.util.CacheEvent.run(CacheEvent.CDB:18)
     com.tangosol.coherence.component.util.daemon.queueProcessor.Service$EventDispatcher.onNotify(Service.CDB:26)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     java.lang.Thread.run(Thread.java:619)
Thread[DistributedCache:DistributedStatsCacheService:EventDispatcher,6,Cluster]
     java.lang.Object.wait(Native Method)
     com.tangosol.coherence.component.util.Daemon.onWait(Daemon.CDB:18)
     com.tangosol.coherence.component.util.daemon.queueProcessor.Service$EventDispatcher.onWait(Service.CDB:7)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:39)
     java.lang.Thread.run(Thread.java:619)
Thread[AWT-Shutdown,5,main]
     java.lang.Object.wait(Native Method)
     java.lang.Object.wait(Object.java:485)
     sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:265)
     java.lang.Thread.run(Thread.java:619)
Thread[EventQueue:ContinuousQueryCache{Cache=stats.OPEN_PRICE, Filter=AlwaysFilter},5,EventQueue:ContinuousQueryCache{Cache=stats.OPEN_PRICE, Filter=AlwaysFilter}]
     java.lang.Object.wait(Native Method)
     java.lang.Object.wait(Object.java:485)
     com.tangosol.util.TaskDaemon.takeNextRipeTask(TaskDaemon.java:345)
     com.tangosol.util.TaskDaemon.run(TaskDaemon.java:103)
     com.tangosol.util.Daemon$DaemonWorker.run(Daemon.java:781)
     java.lang.Thread.run(Thread.java:619)
Thread[readerThread,6,main]
     java.lang.Object.wait(Native Method)
     java.util.TimerThread.mainLoop(Timer.java:509)
     java.util.TimerThread.run(Timer.java:462)
Thread[Thread-11,5,main]
     java.lang.Thread.sleep(Native Method)
     testIbook2.client.testIBBOSocketToServer$1.run(testIBBOSocketToServer.java:82)
     java.lang.Thread.run(Thread.java:619)
Thread[threadReceive,5,main]
     java.net.SocketInputStream.socketRead0(Native Method)
     java.net.SocketInputStream.read(SocketInputStream.java:129)
     sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:264)
     sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306)
     sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158)
     java.io.InputStreamReader.read(InputStreamReader.java:167)
     java.io.BufferedReader.fill(BufferedReader.java:136)
     java.io.BufferedReader.readLine(BufferedReader.java:299)
     java.io.BufferedReader.readLine(BufferedReader.java:362)
     testIbook2.client.testIBBOSocketToServer$2.run(testIBBOSocketToServer.java:171)
     java.lang.Thread.run(Thread.java:619)
Thread[main,5,main]
     java.awt.Component.resize(Component.java:2045)
     java.awt.Component.setSize(Component.java:2035)
     java.awt.Window.setSize(Window.java:791)
     strategies.layout.LayoutViewer.openLayout(LayoutViewer.java:319)
     bbo.BBOClientMain.main(BBOClientMain.java:74)
Thread[TimerQueue,5,system]
     java.lang.Object.wait(Native Method)
     javax.swing.TimerQueue.run(TimerQueue.java:232)
     java.lang.Thread.run(Thread.java:619)
Thread[PacketSpeaker,8,Cluster]
     java.lang.Object.wait(Native Method)
     com.tangosol.coherence.component.util.queue.ConcurrentQueue.waitForEntry(ConcurrentQueue.CDB:16)
     com.tangosol.coherence.component.util.queue.ConcurrentQueue.remove(ConcurrentQueue.CDB:7)
     com.tangosol.coherence.component.util.Queue.remove(Queue.CDB:1)
     com.tangosol.coherence.component.util.daemon.queueProcessor.packetProcessor.PacketSpeaker.onNotify(PacketSpeaker.CDB:21)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     java.lang.Thread.run(Thread.java:619)
Thread[Invocation:Management:EventDispatcher,6,Cluster]
     java.lang.Object.wait(Native Method)
     com.tangosol.coherence.component.util.Daemon.onWait(Daemon.CDB:18)
     com.tangosol.coherence.component.util.daemon.queueProcessor.Service$EventDispatcher.onWait(Service.CDB:7)
     com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:39)
     java.lang.Thread.run(Thread.java:619)
Thread[Finalizer,8,system]
     java.lang.Object.wait(Native Method)
     java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
     java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
     java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
2010-12-15 14:34:09.000/27.344 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:09.015/27.359 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:09.015/27.359 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:09.015/27.359 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:09.031/27.375 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:09.046/27.390 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:09.046/27.390 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:12.203/30.547 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:12.218/30.562 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:12.218/30.562 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:12.218/30.562 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:12.218/30.562 Oracle Coherence GE 3.6.1.0 <Info> (thread=AWT-EventQueue-0, member=34): null
2010-12-15 14:34:12.296/30.640 Oracle Coherence GE 3.6.1.0 <Info> (thread=DistributedCache:DistributedQuotesCacheService:EventDispatcher, member=34): null
2010-12-15 14:34:12.296/30.640 Oracle Coherence GE 3.6.1.0 <Info> (thread=DistributedCache:DistributedQuotesCacheService:EventDispatcher, member=34): null
2010-12-15 14:34:12.296/30.640 Oracle Coherence GE 3.6.1.0 <Info> (thread=DistributedCache:DistributedQuotesCacheService:EventDispatcher, member=34): null
2010-12-15 14:34:12.312/30.656 Oracle Coherence GE 3.6.1.0 <Info> (thread=DistributedCache:DistributedQuotesCacheService:EventDispatcher, member=34): null

Hi Tarun
Please see the discussion in this thread GuardSupport logging thread dumps without giving a reason
Paul

Workflow Runtime Event Queue Data

Does a script exist to cleanup the runtime data in the WF Event queue's ???

Actually, this can be done automatically by setting the Queue Table retention time. There is DBMS_AQADM.ALTER_QUEUE/ALTER_QUEUE_TABLE API to alter the amount of time processed messages are retained in the queue.

Swing event queue, modal dialogs, event threads, etc...

Hey all,
So I am playing around with the focus manager, swing event thread and event queue, etc. Learned quite a bit. I am also playing around with test automation of our UI, using jfcUnit. I have written a few simple apps to play aorund with record/playback, coding tests, etc. What this thread is about though, is figuring out how modal and non-modal dialogs "take over" the event thread/queue? The reason I ask is, if I put a simple test harness like tool embeded in my app as a separate pop-up modal dialog, and from within it there is a GUI that I can use to select a "Test" to run. Now, when I run this test, jfcUnit needs to run on the main window, not within my non-modal dialog. What I am not sure of, however, is that if by using a non-modal dialog all events will go to the main event thread? I mean, I know if I mouse over my second non-modal frame (spawned from the application frame), that events will trigger for that dialog. I remember reading somewhere that modal dialogs "block" the main event queue, all left over events are given to the newly added event queue (presumably by the modal dialog) and existing left-over events get moved to the event queue. If that is the case, I am curious why events for the "old" queue are moved to the new queue if they were orginally intended for the old queue? I would think a "flush" before adding a new queue would be more appropriate so that the old queue can process all of its intended events.
Now, I am just about to try this, but I am hoping a non-modal pop-up will not interfere with the jfcUnit running the UI of the main window. I am guessing, however, that it might. How are non-modal dialogs handled in terms of events and the event queue? Is it the same as modal dialogs? Or is there no blockage of the mainwindow event queue? If there is no blockage, than any sort of automation based on relative positions to a window may occur on the non-modal dialog, in which case it's best to hide the non-modal dialog during running of these tests.
What are your thoughts, or better yet, knowledge of this topic? A decent explanation from a developer standpoint and not from the API's which dont give some of the more detailed info I am seeking is what I am hoping to get out of this.
Thanks.

Check this out. First, AWTListener has a LOT of
different types you can register it for. I ORd all
them together and when I ran my app, it took almost 30
minutes for it to show up because of the huge stream
of events being spit out via System.out. ...Yes, that doesn't surprise me in the least. There's hundreds of events that are fired around, usually unbeknownst to the user for every little thing. Lots of component and container events, in particular.
Just make sure you OR ( using | not || ) ALL the
"mask" values you want to watch for. That may be why
you aren't seeing anything. When I did all that, and
opened a menu, a ton of events came out.Maybe, I'll try that again, but I did specifically add an ActionEvent mask to get action events, and that should be all I need to get action events on buttons or menu items, and it wasn't getting them for either. It was only getting events on buttons when I used SwingEventMonitor, but not menu items.
So I don't quite understand enough of the underlying event handling. Although, I suspect it could have something to do with the fact that these are Swing components, not AWT components (which their native peers) and it's pretty clear from AbstractButton (or was it DefaultButtonModel) how ActionEvents are fired, and they don't seem to have any connection to the code that deals with AWTListeners.
My problem is that I kinda need a way to catch events without having a listener attached directly. Normally, I would have a listener, but there's this situation whereby an action may be triggered before I can get hold of the component to attach my listener to it. Perhaps I can get mouse press/release and just deal with it that way.
Let me know if you did that and still didn't see what
you were looking for. After playing with this, I am
guessing the main reason for AWTListener is to
register a listener for a specific type of event,
instead of listening to them all, hence avoiding lots
of extra overhead. Then again, the main event
dispatcher must do a decent amount of work to fire off
events to listeners of specific awt event types.Yes, it's definitely that. There's no point in sending events if no one is listening for it, so it does save some time.
You are right, popup menus I think are dialogs, I
don't know for sure, but you can access them via the
JMenu.getPopupMenu() and JMenu.isPopupShowin().
However, I am still not getting my test stuff working
quite right.
Yes, for menu popups. For a JPopupMenu on a right-click on any component (tree or whatever), I had a need to know about that from any arbitrary application (it's this GU testing app I'm working on), and since the popup menu doesn't belong to any component before it's shown, I couldn't necessarily know about it til it was displayed. I managed to use a combination of HierarchyEvents (using an AWTEventListener) and "component added" ContainerEvents. Not a simple matter, but it seems to work well.

How to "kill" AWT Event Queue thread without using System.exit()?

When I run my program and the first GUI window is displayed a new thread is created - "AWT-Event Queue". When my program finishes, this thread stays alive and I think it causes some problems I have experienced lately.
Is there any possibility to "kill" this thread without using System.exit() (I can't use it for some specific reasons)

All threads are kept alive by the JVM session. When you use System.exit(int) you kill the current session, thus killing all threads. I'm not sure, though...
What you could do, to make sure all threads die, is to make ever thread you start member of a thread group. When you want to exit you app, you kill all the threads in the thread group before exit.
A small example:
//Should be declared somewhere
static ThreadGroup threadGroup = new ThreadGroup("My ThreadGroup");
class MyClass extends Thread {
super(threadGroup, "MyThread");
Thread thread = new Thread(threadGroup, "MySecondThread");
void exit() {
//Deprecated, seek alternative
threadGroup.stop();
System.exit(0);
}

Triggering events from event queue

Can anyone tell me if events triggered FROM the event queue execute immediatly before returning to the place where the trigger occured (as it seems to when I follow the code in the debugger).
for example in my code I am:
1) capturing a tab change event so I'm on the AWT event queue.
2) calling stopcellediting() on a table which eventually triggers a losefocus event on a control within the table.
3) the program flow seems to go straight to the focuslost event before returning to process the rest of tab change event.
is this behaviour reliable? or is it just a timing coincidence?
thanks in advance.

This behaviour is reliable.
All the code that executes these events is performed in the same thread, so it has no means to do something in parallel.
SwingUtilities.invokeLater method does provide an ability to postpone execution of some code but inside Swing package it is used mainly for paint related tasks (for example the painting of the focus change will most likely occur only after the rest of tab change event processing will be executed).

Continuous event queue ?

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