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

Example 26 with KStreamBuilder

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

the class KTableImplTest method testValueGetter.

@Test
public void testValueGetter() throws IOException {
    final KStreamBuilder builder = new KStreamBuilder();
    String topic1 = "topic1";
    String topic2 = "topic2";
    String storeName1 = "storeName1";
    String storeName2 = "storeName2";
    KTableImpl<String, String, String> table1 = (KTableImpl<String, String, String>) builder.table(stringSerde, stringSerde, topic1, storeName1);
    KTableImpl<String, String, Integer> table2 = (KTableImpl<String, String, Integer>) table1.mapValues(new ValueMapper<String, Integer>() {

        @Override
        public Integer apply(String value) {
            return new Integer(value);
        }
    });
    KTableImpl<String, Integer, Integer> table3 = (KTableImpl<String, Integer, Integer>) table2.filter(new Predicate<String, Integer>() {

        @Override
        public boolean test(String key, Integer value) {
            return (value % 2) == 0;
        }
    });
    KTableImpl<String, String, String> table4 = (KTableImpl<String, String, String>) table1.through(stringSerde, stringSerde, topic2, storeName2);
    KTableValueGetterSupplier<String, String> getterSupplier1 = table1.valueGetterSupplier();
    KTableValueGetterSupplier<String, Integer> getterSupplier2 = table2.valueGetterSupplier();
    KTableValueGetterSupplier<String, Integer> getterSupplier3 = table3.valueGetterSupplier();
    KTableValueGetterSupplier<String, String> getterSupplier4 = table4.valueGetterSupplier();
    driver = new KStreamTestDriver(builder, stateDir, null, null);
    // two state store should be created
    assertEquals(2, driver.allStateStores().size());
    KTableValueGetter<String, String> getter1 = getterSupplier1.get();
    getter1.init(driver.context());
    KTableValueGetter<String, Integer> getter2 = getterSupplier2.get();
    getter2.init(driver.context());
    KTableValueGetter<String, Integer> getter3 = getterSupplier3.get();
    getter3.init(driver.context());
    KTableValueGetter<String, String> getter4 = getterSupplier4.get();
    getter4.init(driver.context());
    driver.process(topic1, "A", "01");
    driver.process(topic1, "B", "01");
    driver.process(topic1, "C", "01");
    driver.flushState();
    assertEquals("01", getter1.get("A"));
    assertEquals("01", getter1.get("B"));
    assertEquals("01", getter1.get("C"));
    assertEquals(new Integer(1), getter2.get("A"));
    assertEquals(new Integer(1), getter2.get("B"));
    assertEquals(new Integer(1), getter2.get("C"));
    assertNull(getter3.get("A"));
    assertNull(getter3.get("B"));
    assertNull(getter3.get("C"));
    assertEquals("01", getter4.get("A"));
    assertEquals("01", getter4.get("B"));
    assertEquals("01", getter4.get("C"));
    driver.process(topic1, "A", "02");
    driver.process(topic1, "B", "02");
    driver.flushState();
    assertEquals("02", getter1.get("A"));
    assertEquals("02", getter1.get("B"));
    assertEquals("01", getter1.get("C"));
    assertEquals(new Integer(2), getter2.get("A"));
    assertEquals(new Integer(2), getter2.get("B"));
    assertEquals(new Integer(1), getter2.get("C"));
    assertEquals(new Integer(2), getter3.get("A"));
    assertEquals(new Integer(2), getter3.get("B"));
    assertNull(getter3.get("C"));
    assertEquals("02", getter4.get("A"));
    assertEquals("02", getter4.get("B"));
    assertEquals("01", getter4.get("C"));
    driver.process(topic1, "A", "03");
    driver.flushState();
    assertEquals("03", getter1.get("A"));
    assertEquals("02", getter1.get("B"));
    assertEquals("01", getter1.get("C"));
    assertEquals(new Integer(3), getter2.get("A"));
    assertEquals(new Integer(2), getter2.get("B"));
    assertEquals(new Integer(1), getter2.get("C"));
    assertNull(getter3.get("A"));
    assertEquals(new Integer(2), getter3.get("B"));
    assertNull(getter3.get("C"));
    assertEquals("03", getter4.get("A"));
    assertEquals("02", getter4.get("B"));
    assertEquals("01", getter4.get("C"));
    driver.process(topic1, "A", null);
    driver.flushState();
    assertNull(getter1.get("A"));
    assertEquals("02", getter1.get("B"));
    assertEquals("01", getter1.get("C"));
    assertNull(getter2.get("A"));
    assertEquals(new Integer(2), getter2.get("B"));
    assertEquals(new Integer(1), getter2.get("C"));
    assertNull(getter3.get("A"));
    assertEquals(new Integer(2), getter3.get("B"));
    assertNull(getter3.get("C"));
    assertNull(getter4.get("A"));
    assertEquals("02", getter4.get("B"));
    assertEquals("01", getter4.get("C"));
}

Example 27 with KStreamBuilder

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

the class KTableImplTest method testStateStore.

@Test
public void testStateStore() throws IOException {
    String topic1 = "topic1";
    String topic2 = "topic2";
    String storeName1 = "storeName1";
    String storeName2 = "storeName2";
    final KStreamBuilder builder = new KStreamBuilder();
    KTableImpl<String, String, String> table1 = (KTableImpl<String, String, String>) builder.table(stringSerde, stringSerde, topic1, storeName1);
    KTableImpl<String, String, String> table2 = (KTableImpl<String, String, String>) builder.table(stringSerde, stringSerde, topic2, storeName2);
    KTableImpl<String, String, Integer> table1Mapped = (KTableImpl<String, String, Integer>) table1.mapValues(new ValueMapper<String, Integer>() {

        @Override
        public Integer apply(String value) {
            return new Integer(value);
        }
    });
    KTableImpl<String, Integer, Integer> table1MappedFiltered = (KTableImpl<String, Integer, Integer>) table1Mapped.filter(new Predicate<String, Integer>() {

        @Override
        public boolean test(String key, Integer value) {
            return (value % 2) == 0;
        }
    });
    table2.join(table1MappedFiltered, new ValueJoiner<String, Integer, String>() {

        @Override
        public String apply(String v1, Integer v2) {
            return v1 + v2;
        }
    });
    driver = new KStreamTestDriver(builder, stateDir, null, null);
    driver.setTime(0L);
    // two state store should be created
    assertEquals(2, driver.allStateStores().size());
}

Example 28 with KStreamBuilder

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

the class KTableKTableJoinTest method testJoin.

@Test
public void testJoin() 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> processor;
    processor = new MockProcessorSupplier<>();
    table1 = builder.table(intSerde, stringSerde, topic1, storeName1);
    table2 = builder.table(intSerde, stringSerde, topic2, storeName2);
    joined = table1.join(table2, MockValueJoiner.TOSTRING_JOINER);
    joined.toStream().process(processor);
    final Collection<Set<String>> copartitionGroups = builder.copartitionGroups();
    assertEquals(1, copartitionGroups.size());
    assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next());
    final KTableValueGetterSupplier<Integer, String> getterSupplier = ((KTableImpl<Integer, String, String>) joined).valueGetterSupplier();
    driver = new KStreamTestDriver(builder, stateDir);
    driver.setTime(0L);
    final 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();
    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"));
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("0:XX0+Y0", "1:XX1+Y1");
    checkJoinedValues(getter, kv(0, "XX0+Y0"), kv(1, "XX1+Y1"));
    // 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:XX0+YY0", "1:XX1+YY1", "2:XX2+YY2", "3:XX3+YY3");
    checkJoinedValues(getter, kv(0, "XX0+YY0"), kv(1, "XX1+YY1"), kv(2, "XX2+YY2"), kv(3, "XX3+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:null", "1:null");
    checkJoinedValues(getter, kv(0, null), kv(1, null));
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    processor.checkAndClearProcessResult("2:XX2+YY2", "3:XX3+YY3");
    checkJoinedValues(getter, kv(2, "XX2+YY2"), kv(3, "XX3+YY3"));
    driver.process(topic1, null, "XX" + 1);
    checkJoinedValues(getter, kv(2, "XX2+YY2"), kv(3, "XX3+YY3"));
}

Example 29 with KStreamBuilder

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

the class KTableKTableJoinTest method testSendingOldValues.

@Test
public void testSendingOldValues() 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);
    ((KTableImpl<?, ?, ?>) joined).enableSendingOldValues();
    proc = new MockProcessorSupplier<>();
    builder.addProcessor("proc", proc, ((KTableImpl<?, ?, ?>) joined).name);
    driver = new KStreamTestDriver(builder, stateDir);
    driver.setTime(0L);
    assertTrue(((KTableImpl<?, ?, ?>) table1).sendingOldValueEnabled());
    assertTrue(((KTableImpl<?, ?, ?>) table2).sendingOldValueEnabled());
    assertTrue(((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<-X0+Y0)", "1:(XX1+Y1<-X1+Y1)");
    // 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<-XX0+Y0)", "1:(XX1+YY1<-XX1+Y1)", "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<-XX0+YY0)", "1:(X1+YY1<-XX1+YY1)", "2:(X2+YY2<-XX2+YY2)", "3:(X3+YY3<-XX3+YY3)");
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], null);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(null<-X0+YY0)", "1:(null<-X1+YY1)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("2:(XX2+YY2<-X2+YY2)", "3:(XX3+YY3<-X3+YY3)");
}

Example 30 with KStreamBuilder

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

the class KTableKTableLeftJoinTest method testSendingOldValue.

@Test
public void testSendingOldValue() throws Exception {
    final KStreamBuilder builder = new KStreamBuilder();
    final int[] expectedKeys = new int[] { 0, 1, 2, 3 };
    KTable<Integer, String> table1;
    KTable<Integer, String> table2;
    KTable<Integer, String> joined;
    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);
    ((KTableImpl<?, ?, ?>) joined).enableSendingOldValues();
    proc = new MockProcessorSupplier<>();
    builder.addProcessor("proc", proc, ((KTableImpl<?, ?, ?>) joined).name);
    driver = new KStreamTestDriver(builder, stateDir);
    driver.setTime(0L);
    assertTrue(((KTableImpl<?, ?, ?>) table1).sendingOldValueEnabled());
    assertTrue(((KTableImpl<?, ?, ?>) table2).sendingOldValueEnabled());
    assertTrue(((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<-X0+null)", "1:(X1+Y1<-X1+null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+Y0<-X0+Y0)", "1:(X1+Y1<-X1+Y1)", "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<-X0+Y0)", "1:(X1+YY1<-X1+Y1)", "2:(X2+YY2<-X2+null)", "3:(X3+YY3<-X3+null)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "X" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+YY0<-X0+YY0)", "1:(X1+YY1<-X1+YY1)", "2:(X2+YY2<-X2+YY2)", "3:(X3+YY3<-X3+YY3)");
    for (int i = 0; i < 2; i++) {
        driver.process(topic2, expectedKeys[i], null);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(X0+null<-X0+YY0)", "1:(X1+null<-X1+YY1)");
    for (int expectedKey : expectedKeys) {
        driver.process(topic1, expectedKey, "XX" + expectedKey);
    }
    driver.flushState();
    proc.checkAndClearProcessResult("0:(XX0+null<-X0+null)", "1:(XX1+null<-X1+null)", "2:(XX2+YY2<-X2+YY2)", "3:(XX3+YY3<-X3+YY3)");
}