I would implement a timeout event in quarkus and I search the best way to do that.
Problem summary :
I have a process who wait answer from a REST service
If the service is call, I'll go to next process
If the service isn't call before the delay => I must not validate the process and go to the next process
So I'm thinking of using the quarkus event bus, with a delayed message. If the message is send, I close the process and go to the next process. If the client answer before the delay, the message will never be send (how can do that?)
Thanks you
Related
Or how to determine if a given message was posted/sent programmatically by another thread or simply another process?
By post and send I mean functions PostMessage and SendMessage
The Windows API does not keep track of the originator of a message. So the only way to know where a message comes from would be to directly hook the (Post|Send)Message functions in every running process.
I have a program that shuts down another application when certain conditions are met. Now most of the time everything works out fine, but sometimes the app is writing to a file and leaves it in a half finished state and has no way of recovering it on restart. I thought that one could send soft close signals and escalate after certain timeouts to more aggressive close signals, going trough a list like this:
1. WM_CLOSE
2. WM_QUIT
3. WM_DESTROY
4. TerminateProcess().
Now I know that the program has no code to handle any signal it receives. Is there a possibility that certain FileHandler under Windows react gracefully on such soft signals or is there no use to sending those, if the app does not handle them explicitly?
This article says:
NOTE: A console application's response to WM_CLOSE depends on whether or not it has installed a control handler.
Does this mean if no control handler is installed sending 1-4 is just as good as sending 4 directly?
I am doing some POC's in tibco general palletes and came across onEventTimeout.By reading the docs it says
The On Event Timeout process starter specifies a process to execute when a Wait For ... activity discards an incoming event due to a timeout. A Wait For ... activity’s event timeout is specified by the Event Timeout field on the Event tab of the activity.
So I created one process definition having start,wait and end activity.Then created another process definition and added oneventtimeout starter process from the general activities.Now when I click on event source browse button(binocular icon) then it does not show me the above process definiton(having wait activity).So I guess I may be missing something.
Can any body please tell me how to use it ?
The onEventTimeout process starter will not work with a Wait activity. Try using a "Wait for" type of activity instead, for instance Wait for JMS Queue Message.
if there any possibility for returning the result to the client in the middle of a synchronous BPEL process?
I put the reply component in the middle of BPEL process, but the client still will wait for the whole process completed. I am wondering how the reply mechanism works in BPEL for synchronous.
Yes, you can place Reply activity and do some other activities after it.
But you have to place Wait activity after Reply to force BPEL engine to actually send the reply message.
Also the Wait activity has to be configured to wait for 3 seconds minimum or the value of MinBPELWait property in the System MBean Browser of Oracle Enterprise Manager Fusion Middleware Control. Otherwise the server will ignore it.
see: http://docs.oracle.com/cd/E23943_01/dev.1111/e10224/bp_events.htm#SOASE516
You can have the reply activity anywhere you want to send the response back to the client. Whatever the activities after the reply activity get executed as expected.
One thing you need to make sure is that, only one reply activity can be there for the respective receive activity.
Instead of wait, you can use a dehydrate activity. The concept is that unless the transaction completes, bpel doesn't reply, so you basically need to end the transaction where you use a reply activity. To do that you have to commit the transaction, so that new transaction can begin.
Note: using a wait would slow your bpel process.
in your composite.xml try modifying below properties of your synchronous bpel component, it should be working with out adding dehydration or wait and there should be no wait at client call.
bpel.config.transaction = required
bpel.config.oneWayDeliveryPolicy=async.persist
Your best bet would be to add a dehydrate activity after your reply, this will force BPEL to complete the transaction then start a new one.
I have a simple program to process messages from a queue.
My intention is to process all available messages in queue and still listen to queue for incoming messages.
I have written the processing part inside a infinite loop as i want it to listen to queue always and process messages.
Once after processing all messages again it tries to get a message(as it is inside a infinite loop) from the queue and there
is no messages it throws MQRC 2033 NO_MSG_AVAILABLE exception(infact it is correct) and my program exits.
Can someone give an idea to continously listen to this queue and avoid this exception.
When you execute the MQGET API call, there is an option to have the program wait for messages. You can specify a wait time (in milliseconds) or specify to wait forever. Just make sure that if you have the app wait for more than a few seconds, also specify 'Fail if Quiescing'. This allows the queue manager to be stopped cleanly. Without 'Fail if Quiescing' the administrator will need to issue a preemptive shutdown which can cause problems.
There is a section specifically for this question in the Programmer's Guide in the Waiting for Messages chapter. Depending on the language you are writing in ,the actual value to specify is in the Programmer's Reference, the Using Java manual or the Using .Net manual. Each of these will be visible in the navigation panel when you click the link above.