Examples with EVTS_TASK_EXECUTION org.apache.ignite.events.EventType.EVTS_TASK_EXECUTION used on opensource projects

Example 1 with EVTS_TASK_EXECUTION

use of org.apache.ignite.events.EventType.EVTS_TASK_EXECUTION in project ignite by apache.

the class EventsExample method localListen.

/**
     * Listen to events that happen only on local node.
     *
     * @throws IgniteException If failed.
     */
private static void localListen() throws IgniteException {
    System.out.println();
    System.out.println(">>> Local event listener example.");
    Ignite ignite = Ignition.ignite();
    IgnitePredicate<TaskEvent> lsnr = evt -> {
        System.out.println("Received task event [evt=" + evt.name() + ", taskName=" + evt.taskName() + ']');
        return true;
    };
    // Register event listener for all local task execution events.
    ignite.events().localListen(lsnr, EVTS_TASK_EXECUTION);
    // Generate task events.
    ignite.compute().withName("example-event-task").run(() -> System.out.println("Executing sample job."));
    // Unsubscribe local task event listener.
    ignite.events().stopLocalListen(lsnr);
}

Example 2 with EVTS_TASK_EXECUTION

use of org.apache.ignite.events.EventType.EVTS_TASK_EXECUTION in project ignite by apache.

the class EventsExample method remoteListen.

/**
     * Listen to events coming from all cluster nodes.
     *
     * @throws IgniteException If failed.
     */
private static void remoteListen() throws IgniteException {
    System.out.println();
    System.out.println(">>> Remote event listener example.");
    // This optional local callback is called for each event notification
    // that passed remote predicate listener.
    IgniteBiPredicate<UUID, TaskEvent> locLsnr = (nodeId, evt) -> {
        // Remote filter only accepts tasks whose name being with "good-task" prefix.
        assert evt.taskName().startsWith("good-task");
        System.out.println("Received task event [evt=" + evt.name() + ", taskName=" + evt.taskName());
        // Return true to continue listening.
        return true;
    };
    // Remote filter which only accepts tasks whose name begins with "good-task" prefix.
    IgnitePredicate<TaskEvent> rmtLsnr = evt -> evt.taskName().startsWith("good-task");
    Ignite ignite = Ignition.ignite();
    // Register event listeners on all nodes to listen for task events.
    ignite.events().remoteListen(locLsnr, rmtLsnr, EVTS_TASK_EXECUTION);
    // Generate task events.
    for (int i = 0; i < 10; i++) {
        ignite.compute().withName(i < 5 ? "good-task-" + i : "bad-task-" + i).run(new IgniteRunnable() {

            // Auto-inject task session.
            @TaskSessionResource
            private ComputeTaskSession ses;

            @Override
            public void run() {
                System.out.println("Executing sample job for task: " + ses.getTaskName());
            }
        });
    }
}