Examples with IgniteException org.apache.ignite.IgniteException used on opensource projects

Example 1 with IgniteException

use of org.apache.ignite.IgniteException in project ignite by apache.

the class ClientHttpTask method split.

/** {@inheritDoc} */
@Override
protected Collection<? extends ComputeJob> split(int gridSize, String arg) {
    try {
        JsonNode json = JSON_MAPPER.readTree(arg);
        List<String> list = null;
        if (json.isArray()) {
            list = new ArrayList<>();
            for (JsonNode child : json) list.add(child.asText());
        }
        return delegate.split(gridSize, list);
    } catch (IOException e) {
        throw new IgniteException(e);
    }
}

Example 2 with IgniteException

use of org.apache.ignite.IgniteException 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 3 with IgniteException

use of org.apache.ignite.IgniteException 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());
            }
        });
    }
}

Example 4 with IgniteException

use of org.apache.ignite.IgniteException in project ignite by apache.

the class MessagingPingPongExample method main.

/**
     * Executes example.
     *
     * @param args Command line arguments, none required.
     * @throws Exception If example execution failed.
     */
public static void main(String[] args) throws Exception {
    // Game is played over the default ignite.
    try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
        if (!ExamplesUtils.checkMinTopologySize(ignite.cluster(), 2))
            return;
        System.out.println();
        System.out.println(">>> Messaging ping-pong example started.");
        // Pick random remote node as a partner.
        ClusterGroup nodeB = ignite.cluster().forRemotes().forRandom();
        // Note that both nodeA and nodeB will always point to
        // same nodes regardless of whether they were implicitly
        // serialized and deserialized on another node as part of
        // anonymous closure's state during its remote execution.
        // Set up remote player.
        ignite.message(nodeB).remoteListen(null, (nodeId, rcvMsg) -> {
            System.out.println("Received message [msg=" + rcvMsg + ", sender=" + nodeId + ']');
            if ("PING".equals(rcvMsg)) {
                ignite.message(ignite.cluster().forNodeId(nodeId)).send(null, "PONG");
                // Continue listening.
                return true;
            }
            // Unsubscribe.
            return false;
        });
        int MAX_PLAYS = 10;
        final CountDownLatch cnt = new CountDownLatch(MAX_PLAYS);
        // Set up local player.
        ignite.message().localListen(null, (nodeId, rcvMsg) -> {
            System.out.println("Received message [msg=" + rcvMsg + ", sender=" + nodeId + ']');
            if (cnt.getCount() == 1) {
                ignite.message(ignite.cluster().forNodeId(nodeId)).send(null, "STOP");
                cnt.countDown();
                // Stop listening.
                return false;
            } else if ("PONG".equals(rcvMsg))
                ignite.message(ignite.cluster().forNodeId(nodeId)).send(null, "PING");
            else
                throw new IgniteException("Received unexpected message: " + rcvMsg);
            cnt.countDown();
            // Continue listening.
            return true;
        });
        // Serve!
        ignite.message(nodeB).send(null, "PING");
        // Wait til the game is over.
        try {
            cnt.await();
        } catch (InterruptedException e) {
            System.err.println("Hm... let us finish the game!\n" + e);
        }
    }
}

Example 5 with IgniteException

use of org.apache.ignite.IgniteException in project ignite by apache.

the class MessagingExample method startListening.

/**
     * Start listening to messages on remote cluster nodes.
     *
     * @param msg Ignite messaging.
     */
private static void startListening(IgniteMessaging msg) {
    // Add ordered message listener.
    msg.remoteListen(EXAMPLE_TOPIC.ORDERED, new IgniteBiPredicate<UUID, String>() {

        @IgniteInstanceResource
        private Ignite ignite;

        @Override
        public boolean apply(UUID nodeId, String msg) {
            System.out.println("Received ordered message [msg=" + msg + ", fromNodeId=" + nodeId + ']');
            try {
                ignite.message(ignite.cluster().forNodeId(nodeId)).send(EXAMPLE_TOPIC.ORDERED, msg);
            } catch (IgniteException e) {
                e.printStackTrace();
            }
            // Return true to continue listening.
            return true;
        }
    });
    // Add unordered message listener.
    msg.remoteListen(EXAMPLE_TOPIC.UNORDERED, new IgniteBiPredicate<UUID, String>() {

        @IgniteInstanceResource
        private Ignite ignite;

        @Override
        public boolean apply(UUID nodeId, String msg) {
            System.out.println("Received unordered message [msg=" + msg + ", fromNodeId=" + nodeId + ']');
            try {
                ignite.message(ignite.cluster().forNodeId(nodeId)).send(EXAMPLE_TOPIC.UNORDERED, msg);
            } catch (IgniteException e) {
                e.printStackTrace();
            }
            // Return true to continue listening.
            return true;
        }
    });
}