Examples with KStreamBuilder org.apache.kafka.streams.kstream.KStreamBuilder used on opensource projects

Example 71 with KStreamBuilder

use of org.apache.kafka.streams.kstream.KStreamBuilder in project kafka by apache.

the class KTableImplTest method testRepartition.

@Test
public void testRepartition() throws Exception {
    String topic1 = "topic1";
    String storeName1 = "storeName1";
    final KStreamBuilder builder = new KStreamBuilder();
    KTableImpl<String, String, String> table1 = (KTableImpl<String, String, String>) builder.table(stringSerde, stringSerde, topic1, storeName1);
    KTableImpl<String, String, String> table1Aggregated = (KTableImpl<String, String, String>) table1.groupBy(MockKeyValueMapper.<String, String>NoOpKeyValueMapper()).aggregate(MockInitializer.STRING_INIT, MockAggregator.TOSTRING_ADDER, MockAggregator.TOSTRING_REMOVER, "mock-result1");
    KTableImpl<String, String, String> table1Reduced = (KTableImpl<String, String, String>) table1.groupBy(MockKeyValueMapper.<String, String>NoOpKeyValueMapper()).reduce(MockReducer.STRING_ADDER, MockReducer.STRING_REMOVER, "mock-result2");
    driver = new KStreamTestDriver(builder, stateDir, stringSerde, stringSerde);
    driver.setTime(0L);
    // three state store should be created, one for source, one for aggregate and one for reduce
    assertEquals(3, driver.allStateStores().size());
    // contains the corresponding repartition source / sink nodes
    assertTrue(driver.allProcessorNames().contains("KSTREAM-SINK-0000000003"));
    assertTrue(driver.allProcessorNames().contains("KSTREAM-SOURCE-0000000004"));
    assertTrue(driver.allProcessorNames().contains("KSTREAM-SINK-0000000007"));
    assertTrue(driver.allProcessorNames().contains("KSTREAM-SOURCE-0000000008"));
    Field valSerializerField = ((SinkNode) driver.processor("KSTREAM-SINK-0000000003")).getClass().getDeclaredField("valSerializer");
    Field valDeserializerField = ((SourceNode) driver.processor("KSTREAM-SOURCE-0000000004")).getClass().getDeclaredField("valDeserializer");
    valSerializerField.setAccessible(true);
    valDeserializerField.setAccessible(true);
    assertNotNull(((ChangedSerializer) valSerializerField.get(driver.processor("KSTREAM-SINK-0000000003"))).inner());
    assertNotNull(((ChangedDeserializer) valDeserializerField.get(driver.processor("KSTREAM-SOURCE-0000000004"))).inner());
    assertNotNull(((ChangedSerializer) valSerializerField.get(driver.processor("KSTREAM-SINK-0000000007"))).inner());
    assertNotNull(((ChangedDeserializer) valDeserializerField.get(driver.processor("KSTREAM-SOURCE-0000000008"))).inner());
}

Example 72 with KStreamBuilder

use of org.apache.kafka.streams.kstream.KStreamBuilder in project kafka by apache.

the class KTableImplTest method testKTable.

@Test
public void testKTable() {
    final KStreamBuilder builder = new KStreamBuilder();
    String topic1 = "topic1";
    String topic2 = "topic2";
    String storeName1 = "storeName1";
    String storeName2 = "storeName2";
    KTable<String, String> table1 = builder.table(stringSerde, stringSerde, topic1, storeName1);
    MockProcessorSupplier<String, String> proc1 = new MockProcessorSupplier<>();
    table1.toStream().process(proc1);
    KTable<String, Integer> table2 = table1.mapValues(new ValueMapper<String, Integer>() {

        @Override
        public Integer apply(String value) {
            return new Integer(value);
        }
    });
    MockProcessorSupplier<String, Integer> proc2 = new MockProcessorSupplier<>();
    table2.toStream().process(proc2);
    KTable<String, Integer> table3 = table2.filter(new Predicate<String, Integer>() {

        @Override
        public boolean test(String key, Integer value) {
            return (value % 2) == 0;
        }
    });
    MockProcessorSupplier<String, Integer> proc3 = new MockProcessorSupplier<>();
    table3.toStream().process(proc3);
    KTable<String, String> table4 = table1.through(stringSerde, stringSerde, topic2, storeName2);
    MockProcessorSupplier<String, String> proc4 = new MockProcessorSupplier<>();
    table4.toStream().process(proc4);
    driver = new KStreamTestDriver(builder, stateDir);
    driver.process(topic1, "A", "01");
    driver.flushState();
    driver.process(topic1, "B", "02");
    driver.flushState();
    driver.process(topic1, "C", "03");
    driver.flushState();
    driver.process(topic1, "D", "04");
    driver.flushState();
    driver.flushState();
    assertEquals(Utils.mkList("A:01", "B:02", "C:03", "D:04"), proc1.processed);
    assertEquals(Utils.mkList("A:1", "B:2", "C:3", "D:4"), proc2.processed);
    assertEquals(Utils.mkList("A:null", "B:2", "C:null", "D:4"), proc3.processed);
    assertEquals(Utils.mkList("A:01", "B:02", "C:03", "D:04"), proc4.processed);
}

Example 73 with KStreamBuilder

use of org.apache.kafka.streams.kstream.KStreamBuilder in project kafka by apache.

the class KTableKTableJoinTest method testNotSendingOldValues.

@Test
public void testNotSendingOldValues() throws Exception {
    final KStreamBuilder builder = new KStreamBuilder();
    final int[] expectedKeys = new int[] { 0, 1, 2, 3 };
    final KTable<Integer, String> table1;
    final KTable<Integer, String> table2;
    final KTable<Integer, String> joined;
    final MockProcessorSupplier<Integer, String> proc;
    table1 = builder.table(intSerde, stringSerde, topic1, storeName1);
    table2 = builder.table(intSerde, stringSerde, topic2, storeName2);
    joined = table1.join(table2, MockValueJoiner.TOSTRING_JOINER);
    proc = new MockProcessorSupplier<>();
    builder.addProcessor("proc", proc, ((KTableImpl<?, ?, ?>) joined).name);
    driver = new KStreamTestDriver(builder, stateDir);
    driver.setTime(0L);
    assertFalse(((KTableImpl<?, ?, ?>) table1).sendingOldValueEnabled());
    assertFalse(((KTableImpl<?, ?, ?>) table2).sendingOldValueEnabled());
    assertFalse(((KTableImpl<?, ?, ?>) joined).sendingOldValueEnabled());
    for (int i = 0; i < 2; i++) {
        driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]);
    }
    driver.flushState();
    proc.checkAndClearProcessResult();
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+Y0<-null)", "1:(X1+Y1<-null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(XX0+Y0<-null)", "1:(XX1+Y1<-null)");
    // push all items to the other stream. this should produce four items.
    for (int expectedKey : expectedKeys) {
        driver.process(topic2, expectedKey, "YY" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(XX0+YY0<-null)", "1:(XX1+YY1<-null)", "2:(XX2+YY2<-null)", "3:(XX3+YY3<-null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+YY0<-null)", "1:(X1+YY1<-null)", "2:(X2+YY2<-null)", "3:(X3+YY3<-null)");
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], null);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(null<-null)", "1:(null<-null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("2:(XX2+YY2<-null)", "3:(XX3+YY3<-null)");
}

Example 74 with KStreamBuilder

use of org.apache.kafka.streams.kstream.KStreamBuilder in project kafka by apache.

the class KTableKTableLeftJoinTest method testJoin.

@Test
public void testJoin() throws Exception {
    final KStreamBuilder builder = new KStreamBuilder();
    final int[] expectedKeys = new int[] { 0, 1, 2, 3 };
    KTable<Integer, String> table1 = builder.table(intSerde, stringSerde, topic1, storeName1);
    KTable<Integer, String> table2 = builder.table(intSerde, stringSerde, topic2, storeName2);
    KTable<Integer, String> joined = table1.leftJoin(table2, MockValueJoiner.TOSTRING_JOINER);
    MockProcessorSupplier<Integer, String> processor;
    processor = new MockProcessorSupplier<>();
    joined.toStream().process(processor);
    Collection<Set<String>> copartitionGroups = builder.copartitionGroups();
    assertEquals(1, copartitionGroups.size());
    assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next());
    KTableValueGetterSupplier<Integer, String> getterSupplier = ((KTableImpl<Integer, String, String>) joined).valueGetterSupplier();
    driver = new KStreamTestDriver(builder, stateDir);
    driver.setTime(0L);
    KTableValueGetter<Integer, String> getter = getterSupplier.get();
    getter.init(driver.context());
    for (int i = 0; i < 2; i++) {
        driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]);
    }
    // pass tuple with null key, it will be discarded in join process
    driver.process(topic1, null, "SomeVal");
    driver.flushState();
    processor.checkAndClearProcessResult("0:X0+null", "1:X1+null");
    checkJoinedValues(getter, kv(0, "X0+null"), kv(1, "X1+null"), kv(2, null), kv(3, null));
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]);
    }
    // pass tuple with null key, it will be discarded in join process
    driver.process(topic2, null, "AnotherVal");
    driver.flushState();
    processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1");
    checkJoinedValues(getter, kv(0, "X0+Y0"), kv(1, "X1+Y1"), kv(2, null), kv(3, null));
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1", "2:X2+null", "3:X3+null");
    checkJoinedValues(getter, kv(0, "X0+Y0"), kv(1, "X1+Y1"), kv(2, "X2+null"), kv(3, "X3+null"));
    // push all items to the other stream. this should produce four items.
    for (int expectedKey : expectedKeys) {
        driver.process(topic2, expectedKey, "YY" + expectedKey);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3");
    checkJoinedValues(getter, kv(0, "X0+YY0"), kv(1, "X1+YY1"), kv(2, "X2+YY2"), kv(3, "X3+YY3"));
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3");
    checkJoinedValues(getter, kv(0, "X0+YY0"), kv(1, "X1+YY1"), kv(2, "X2+YY2"), kv(3, "X3+YY3"));
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], null);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("0:X0+null", "1:X1+null");
    checkJoinedValues(getter, kv(0, "X0+null"), kv(1, "X1+null"), kv(2, "X2+YY2"), kv(3, "X3+YY3"));
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("0:XX0+null", "1:XX1+null", "2:XX2+YY2", "3:XX3+YY3");
    checkJoinedValues(getter, kv(0, "XX0+null"), kv(1, "XX1+null"), kv(2, "XX2+YY2"), kv(3, "XX3+YY3"));
}

Example 75 with KStreamBuilder

use of org.apache.kafka.streams.kstream.KStreamBuilder in project kafka by apache.

the class KTableKTableLeftJoinTest method testNotSendingOldValue.

@Test
public void testNotSendingOldValue() throws Exception {
    final KStreamBuilder builder = new KStreamBuilder();
    final int[] expectedKeys = new int[] { 0, 1, 2, 3 };
    final KTable<Integer, String> table1;
    final KTable<Integer, String> table2;
    final KTable<Integer, String> joined;
    final MockProcessorSupplier<Integer, String> proc;
    table1 = builder.table(intSerde, stringSerde, topic1, storeName1);
    table2 = builder.table(intSerde, stringSerde, topic2, storeName2);
    joined = table1.leftJoin(table2, MockValueJoiner.TOSTRING_JOINER);
    proc = new MockProcessorSupplier<>();
    builder.addProcessor("proc", proc, ((KTableImpl<?, ?, ?>) joined).name);
    driver = new KStreamTestDriver(builder, stateDir);
    driver.setTime(0L);
    assertTrue(((KTableImpl<?, ?, ?>) table1).sendingOldValueEnabled());
    assertFalse(((KTableImpl<?, ?, ?>) table2).sendingOldValueEnabled());
    assertFalse(((KTableImpl<?, ?, ?>) joined).sendingOldValueEnabled());
    for (int i = 0; i < 2; i++) {
        driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+null<-null)", "1:(X1+null<-null)");
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+Y0<-null)", "1:(X1+Y1<-null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+Y0<-null)", "1:(X1+Y1<-null)", "2:(X2+null<-null)", "3:(X3+null<-null)");
    // push all items to the other stream. this should produce four items.
    for (int expectedKey : expectedKeys) {
        driver.process(topic2, expectedKey, "YY" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+YY0<-null)", "1:(X1+YY1<-null)", "2:(X2+YY2<-null)", "3:(X3+YY3<-null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+YY0<-null)", "1:(X1+YY1<-null)", "2:(X2+YY2<-null)", "3:(X3+YY3<-null)");
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], null);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+null<-null)", "1:(X1+null<-null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(XX0+null<-null)", "1:(XX1+null<-null)", "2:(XX2+YY2<-null)", "3:(XX3+YY3<-null)");
}