Examples with IgnitePredicate org.apache.ignite.lang.IgnitePredicate used on opensource projects

Example 61 with IgnitePredicate

use of org.apache.ignite.lang.IgnitePredicate in project ignite by apache.

the class IgniteDynamicCacheStartSelfTest method testServerNodesLeftEvent.

/**
 * @throws Exception If failed.
 */
public void testServerNodesLeftEvent() throws Exception {
    testAttribute = false;
    startGrid(nodeCount());
    CacheConfiguration cfg = new CacheConfiguration(DYNAMIC_CACHE_NAME);
    cfg.setNodeFilter(F.not(NODE_FILTER));
    IgniteCache<Object, Object> cache = ignite(0).createCache(cfg);
    final CountDownLatch[] latches = new CountDownLatch[nodeCount()];
    IgnitePredicate[] lsnrs = new IgnitePredicate[nodeCount()];
    for (int i = 0; i < nodeCount(); i++) {
        final int idx = i;
        latches[i] = new CountDownLatch(1);
        lsnrs[i] = new IgnitePredicate<CacheEvent>() {

            @Override
            public boolean apply(CacheEvent e) {
                switch(e.type()) {
                    case EventType.EVT_CACHE_NODES_LEFT:
                        latches[idx].countDown();
                        break;
                    default:
                        assert false;
                }
                assertEquals(DYNAMIC_CACHE_NAME, e.cacheName());
                return true;
            }
        };
        ignite(i).events().localListen(lsnrs[i], EventType.EVTS_CACHE_LIFECYCLE);
    }
    stopGrid(nodeCount());
    for (CountDownLatch latch : latches) latch.await();
    for (int i = 0; i < nodeCount(); i++) ignite(i).events().stopLocalListen(lsnrs[i]);
    cache.destroy();
}

Example 62 with IgnitePredicate

use of org.apache.ignite.lang.IgnitePredicate in project ignite by apache.

the class PlatformEvents method startWaitForLocal.

/**
 * Starts the waitForLocal.
 *
 * @param reader Reader
 * @param events Events.
 * @return Result.
 */
private EventAdapter startWaitForLocal(BinaryRawReaderEx reader, IgniteEvents events) {
    Long filterHnd = reader.readObject();
    IgnitePredicate filter = filterHnd != null ? localFilter(filterHnd) : null;
    int[] eventTypes = readEventTypes(reader);
    return (EventAdapter) events.waitForLocal(filter, eventTypes);
}

Example 63 with IgnitePredicate

use of org.apache.ignite.lang.IgnitePredicate in project ignite by apache.

the class CacheEventsExample method main.

/**
 * Executes example.
 *
 * @param args Command line arguments, none required.
 * @throws IgniteException If example execution failed.
 */
public static void main(String[] args) throws IgniteException, InterruptedException {
    try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
        System.out.println();
        System.out.println(">>> Cache events example started.");
        // Auto-close cache at the end of the example.
        try (IgniteCache<Integer, String> cache = ignite.getOrCreateCache(CACHE_NAME)) {
            // This optional local callback is called for each event notification
            // that passed remote predicate listener.
            IgniteBiPredicate<UUID, CacheEvent> locLsnr = new IgniteBiPredicate<UUID, CacheEvent>() {

                @Override
                public boolean apply(UUID uuid, CacheEvent evt) {
                    System.out.println("Received event [evt=" + evt.name() + ", key=" + evt.key() + ", oldVal=" + evt.oldValue() + ", newVal=" + evt.newValue());
                    // Continue listening.
                    return true;
                }
            };
            // Remote listener which only accepts events for keys that are
            // greater or equal than 10 and if event node is primary for this key.
            IgnitePredicate<CacheEvent> rmtLsnr = new IgnitePredicate<CacheEvent>() {

                @Override
                public boolean apply(CacheEvent evt) {
                    System.out.println("Cache event [name=" + evt.name() + ", key=" + evt.key() + ']');
                    int key = evt.key();
                    return key >= 10 && ignite.affinity(CACHE_NAME).isPrimary(ignite.cluster().localNode(), key);
                }
            };
            // Subscribe to specified cache events on all nodes that have cache running.
            // Cache events are explicitly enabled in examples/config/example-ignite.xml file.
            ignite.events(ignite.cluster().forCacheNodes(CACHE_NAME)).remoteListen(locLsnr, rmtLsnr, EVT_CACHE_OBJECT_PUT, EVT_CACHE_OBJECT_READ, EVT_CACHE_OBJECT_REMOVED);
            // Generate cache events.
            for (int i = 0; i < 20; i++) cache.put(i, Integer.toString(i));
            // Wait for a while while callback is notified about remaining puts.
            Thread.sleep(2000);
        } finally {
            // Distributed cache could be removed from cluster only by #destroyCache() call.
            ignite.destroyCache(CACHE_NAME);
        }
    }
}

Example 64 with IgnitePredicate

use of org.apache.ignite.lang.IgnitePredicate 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 to continue listening.
        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 65 with IgnitePredicate

use of org.apache.ignite.lang.IgnitePredicate in project ignite by apache.

the class GridCachePartitionedUnloadEventsSelfTest method checkPartitionUnloadEvents.

/**
 * @param evts Events.
 * @param g Grid.
 * @param parts Parts.
 */
private void checkPartitionUnloadEvents(Collection<Event> evts, Ignite g, Collection<GridDhtLocalPartition> parts) {
    assertEquals(parts.size(), evts.size());
    for (Event evt : evts) {
        CacheRebalancingEvent unloadEvt = (CacheRebalancingEvent) evt;
        final int part = unloadEvt.partition();
        assertNotNull("Unexpected partition: " + part, F.find(parts, null, new IgnitePredicate<GridDhtLocalPartition>() {

            @Override
            public boolean apply(GridDhtLocalPartition e) {
                return e.id() == part;
            }
        }));
        assertEquals(g.cache(DEFAULT_CACHE_NAME).getName(), unloadEvt.cacheName());
        assertEquals(g.cluster().localNode().id(), unloadEvt.node().id());
    }
}