Examples with IMapJet com.hazelcast.jet.IMapJet used on opensource projects

Example 6 with IMapJet

use of com.hazelcast.jet.IMapJet in project hazelcast-jet-reference-manual by hazelcast.

the class JUS method s1.

static void s1() {
    JetInstance jet = Jet.newJetInstance();
    try {
        // tag::s1[]
        IMapJet<String, Integer> map = jet.getMap("latitudes");
        map.put("London", 51);
        map.put("Paris", 48);
        map.put("NYC", 40);
        map.put("Sydney", -34);
        map.put("Sao Paulo", -23);
        map.put("Jakarta", -6);
        DistributedStream.fromMap(map).filter(e -> e.getValue() < 0).forEach(System.out::println);
    // end::s1[]
    } finally {
        Jet.shutdownAll();
    }
}

Example 7 with IMapJet

use of com.hazelcast.jet.IMapJet in project hazelcast-jet by hazelcast.

the class HazelcastConnectorTest method when_streamMap_withFilterAndProjection.

@Test
public void when_streamMap_withFilterAndProjection() {
    DAG dag = new DAG();
    Vertex source = dag.newVertex("source", SourceProcessors.<Integer, Integer, Integer>streamMapP(streamSourceName, event -> event.getKey() != 0, EventJournalMapEvent::getKey, START_FROM_OLDEST, wmGenParams(i -> i, limitingLag(0), noThrottling(), 10_000)));
    Vertex sink = dag.newVertex("sink", writeListP(streamSinkName));
    dag.edge(between(source, sink));
    Job job = jetInstance.newJob(dag);
    IMapJet<Integer, Integer> sourceMap = jetInstance.getMap(streamSourceName);
    range(0, ENTRY_COUNT).forEach(i -> sourceMap.put(i, i));
    assertSizeEventually(ENTRY_COUNT - 1, jetInstance.getList(streamSinkName));
    assertFalse(jetInstance.getList(streamSinkName).contains(0));
    assertTrue(jetInstance.getList(streamSinkName).contains(1));
    job.cancel();
}

Example 8 with IMapJet

use of com.hazelcast.jet.IMapJet in project hazelcast-jet by hazelcast.

the class SnapshotFailureTest method when_snapshotFails_then_jobShouldNotFail.

@Test
public void when_snapshotFails_then_jobShouldNotFail() {
    int numPartitions = 2;
    int numElements = 10;
    IMapJet<Object, Object> results = instance1.getMap("results");
    DAG dag = new DAG();
    SequencesInPartitionsMetaSupplier sup = new SequencesInPartitionsMetaSupplier(numPartitions, numElements);
    Vertex generator = dag.newVertex("generator", peekOutputP(throttle(sup, 2))).localParallelism(1);
    Vertex writeMap = dag.newVertex("writeMap", writeMapP(results.getName())).localParallelism(1);
    dag.edge(between(generator, writeMap));
    JobConfig config = new JobConfig();
    config.setProcessingGuarantee(ProcessingGuarantee.EXACTLY_ONCE);
    config.setSnapshotIntervalMillis(100);
    Job job = instance1.newJob(dag, config);
    // let's start a second job that will watch the snapshots map and write failed
    // SnapshotRecords to a list, which we will check for presence of failed snapshot
    Pipeline p = Pipeline.create();
    p.drawFrom(Sources.mapJournal(snapshotsMapName(job.getId()), event -> event.getNewValue() instanceof SnapshotRecord && ((SnapshotRecord) event.getNewValue()).status() == SnapshotStatus.FAILED, EventJournalMapEvent::getNewValue, JournalInitialPosition.START_FROM_OLDEST)).peek().drainTo(Sinks.list("failed_snapshot_records"));
    instance1.newJob(p);
    job.join();
    assertEquals("numPartitions", numPartitions, results.size());
    assertEquals("offset partition 0", numElements - 1, results.get(0));
    assertEquals("offset partition 1", numElements - 1, results.get(1));
    assertTrue("no failure occurred in store", storeFailed);
    assertFalse("no failed snapshot appeared in snapshotsMap", instance1.getList("failed_snapshot_records").isEmpty());
}