Examples of com.sun.jdmk.tasks.DaemonTaskServer$Daemon

com.sun.jdmk.tasks.DaemonTaskServer

This class implements a Task Server that runs in its own thread. Objects can submit tasks to this object, and they will be executed in background in this object daemon thread. The submitted tasks should not block or last too long - because it will prevent following tasks to be executed. When a task producer calls the submitTask(Task) method, the task is put inside a FIFO list, and the Task Server Thread is waken up, if necessary. After that, the method return.

The Task Server Thread then asynchronously takes the tasks out of the FIFO list, and invokes the run() method.

This mechanism guarantee that the Task producer will spend a minimum time invoking the tasks, and will not be blocked. @see com.sun.jdmk.tasks.Task @see com.sun.jdmk.tasks.TaskServer @since Java DMK 5.0

            // of trap loss.
            // We set the priority of the DaemonTaskServer to 
            // Thread.NORM_PRIORITY so that emptying the socket takes 
            // precedence over trap processing.
            //
            final DaemonTaskServer taskServer = new DaemonTaskServer();
            taskServer.start(Thread.NORM_PRIORITY);


            // Create a listener and dispatcher for SNMP traps 
            // (SnmpEventReportDispatcher).
            // SnmpEventReportDispatcher is run as a thread and listens 
            // for traps in UDP port = agent port + 1.
            // Add TrapListenerImpl as SnmpTrapListener.
            // TrapListenerImpl will receive a callback when a valid trap
            // PDU is received.
            //
            final SnmpEventReportDispatcher trapAgent =
                    new SnmpEventReportDispatcher((this.getTrapSnmpPort()),
                    null, taskServer, null);
            SNMPTrapListenerImpl trapListener = new SNMPTrapListenerImpl();
            trapAgent.addTrapListener(trapListener);
            final Thread trapThread = new Thread(trapAgent);
            trapThread.setPriority(Thread.MAX_PRIORITY);
            trapThread.start();
            
            // One Trap
            this.setDown();
            
            int trapNumbers = trapListener.getNumberV1Traps();
            
            // Should received 1 traps
            assertEquals(trapNumbers, 1);
            
            trapAgent.close();
            taskServer.terminate();


            return;


        } catch (Exception e) {
            fail("SyncManager::main: " +

Examples of com.sun.jdmk.tasks.DaemonTaskServer$Daemon

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