Examples with StringDeserializer org.apache.kafka.common.serialization.StringDeserializer used on opensource projects

Example 11 with StringDeserializer

use of org.apache.kafka.common.serialization.StringDeserializer in project kafka by apache.

the class KStreamAggregationIntegrationTest method shouldReduceWindowed.

@Test
public void shouldReduceWindowed() throws Exception {
    final long firstBatchTimestamp = mockTime.milliseconds();
    mockTime.sleep(1000);
    produceMessages(firstBatchTimestamp);
    final long secondBatchTimestamp = mockTime.milliseconds();
    produceMessages(secondBatchTimestamp);
    produceMessages(secondBatchTimestamp);
    groupedStream.reduce(reducer, TimeWindows.of(500L), "reduce-time-windows").toStream(new KeyValueMapper<Windowed<String>, String, String>() {

        @Override
        public String apply(final Windowed<String> windowedKey, final String value) {
            return windowedKey.key() + "@" + windowedKey.window().start();
        }
    }).to(Serdes.String(), Serdes.String(), outputTopic);
    startStreams();
    final List<KeyValue<String, String>> windowedOutput = receiveMessages(new StringDeserializer(), new StringDeserializer(), 15);
    final Comparator<KeyValue<String, String>> comparator = new Comparator<KeyValue<String, String>>() {

        @Override
        public int compare(final KeyValue<String, String> o1, final KeyValue<String, String> o2) {
            return KStreamAggregationIntegrationTest.compare(o1, o2);
        }
    };
    Collections.sort(windowedOutput, comparator);
    final long firstBatchWindow = firstBatchTimestamp / 500 * 500;
    final long secondBatchWindow = secondBatchTimestamp / 500 * 500;
    assertThat(windowedOutput, is(Arrays.asList(new KeyValue<>("A@" + firstBatchWindow, "A"), new KeyValue<>("A@" + secondBatchWindow, "A"), new KeyValue<>("A@" + secondBatchWindow, "A:A"), new KeyValue<>("B@" + firstBatchWindow, "B"), new KeyValue<>("B@" + secondBatchWindow, "B"), new KeyValue<>("B@" + secondBatchWindow, "B:B"), new KeyValue<>("C@" + firstBatchWindow, "C"), new KeyValue<>("C@" + secondBatchWindow, "C"), new KeyValue<>("C@" + secondBatchWindow, "C:C"), new KeyValue<>("D@" + firstBatchWindow, "D"), new KeyValue<>("D@" + secondBatchWindow, "D"), new KeyValue<>("D@" + secondBatchWindow, "D:D"), new KeyValue<>("E@" + firstBatchWindow, "E"), new KeyValue<>("E@" + secondBatchWindow, "E"), new KeyValue<>("E@" + secondBatchWindow, "E:E"))));
}

Example 12 with StringDeserializer

use of org.apache.kafka.common.serialization.StringDeserializer in project kafka by apache.

the class KStreamAggregationIntegrationTest method shouldAggregateWindowed.

@Test
public void shouldAggregateWindowed() throws Exception {
    final long firstTimestamp = mockTime.milliseconds();
    mockTime.sleep(1000);
    produceMessages(firstTimestamp);
    final long secondTimestamp = mockTime.milliseconds();
    produceMessages(secondTimestamp);
    produceMessages(secondTimestamp);
    groupedStream.aggregate(initializer, aggregator, TimeWindows.of(500L), Serdes.Integer(), "aggregate-by-key-windowed").toStream(new KeyValueMapper<Windowed<String>, Integer, String>() {

        @Override
        public String apply(final Windowed<String> windowedKey, final Integer value) {
            return windowedKey.key() + "@" + windowedKey.window().start();
        }
    }).to(Serdes.String(), Serdes.Integer(), outputTopic);
    startStreams();
    final List<KeyValue<String, Integer>> windowedMessages = receiveMessages(new StringDeserializer(), new IntegerDeserializer(), 15);
    final Comparator<KeyValue<String, Integer>> comparator = new Comparator<KeyValue<String, Integer>>() {

        @Override
        public int compare(final KeyValue<String, Integer> o1, final KeyValue<String, Integer> o2) {
            return KStreamAggregationIntegrationTest.compare(o1, o2);
        }
    };
    Collections.sort(windowedMessages, comparator);
    final long firstWindow = firstTimestamp / 500 * 500;
    final long secondWindow = secondTimestamp / 500 * 500;
    assertThat(windowedMessages, is(Arrays.asList(new KeyValue<>("A@" + firstWindow, 1), new KeyValue<>("A@" + secondWindow, 1), new KeyValue<>("A@" + secondWindow, 2), new KeyValue<>("B@" + firstWindow, 1), new KeyValue<>("B@" + secondWindow, 1), new KeyValue<>("B@" + secondWindow, 2), new KeyValue<>("C@" + firstWindow, 1), new KeyValue<>("C@" + secondWindow, 1), new KeyValue<>("C@" + secondWindow, 2), new KeyValue<>("D@" + firstWindow, 1), new KeyValue<>("D@" + secondWindow, 1), new KeyValue<>("D@" + secondWindow, 2), new KeyValue<>("E@" + firstWindow, 1), new KeyValue<>("E@" + secondWindow, 1), new KeyValue<>("E@" + secondWindow, 2))));
}

Example 13 with StringDeserializer

use of org.apache.kafka.common.serialization.StringDeserializer in project kafka by apache.

the class GlobalStateTaskTest method before.

@Before
public void before() {
    sourceOne = new MockSourceNode<>(new String[] { "t1" }, new StringDeserializer(), new StringDeserializer());
    sourceTwo = new MockSourceNode<>(new String[] { "t2" }, new IntegerDeserializer(), new IntegerDeserializer());
    processorNodes = Arrays.asList(sourceOne, sourceTwo, new MockProcessorNode<>(-1), new MockProcessorNode<>(-1));
    final Set<String> storeNames = Utils.mkSet("t1-store", "t2-store");
    final Map<String, SourceNode> sourceByTopics = new HashMap<>();
    sourceByTopics.put("t1", sourceOne);
    sourceByTopics.put("t2", sourceTwo);
    final Map<String, String> storeToTopic = new HashMap<>();
    storeToTopic.put("t1-store", "t1");
    storeToTopic.put("t2-store", "t2");
    final ProcessorTopology topology = new ProcessorTopology(processorNodes, sourceByTopics, Collections.<String, SinkNode>emptyMap(), Collections.<StateStore>emptyList(), storeToTopic, Collections.<StateStore>emptyList());
    context = new NoOpProcessorContext();
    t1 = new TopicPartition("t1", 1);
    t2 = new TopicPartition("t2", 1);
    offsets = new HashMap<>();
    offsets.put(t1, 50L);
    offsets.put(t2, 100L);
    stateMgr = new GlobalStateManagerStub(storeNames, offsets);
    globalStateTask = new GlobalStateUpdateTask(topology, context, stateMgr);
}