/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.kafka.streams.kstream.internals;
import org.apache.kafka.common.serialization.Serde;
import org.apache.kafka.common.serialization.Serdes;
import org.apache.kafka.common.utils.Utils;
import org.apache.kafka.streams.kstream.KStreamBuilder;
import org.apache.kafka.streams.kstream.KTable;
import org.apache.kafka.streams.kstream.Predicate;
import org.apache.kafka.streams.kstream.ValueMapper;
import org.apache.kafka.test.KStreamTestDriver;
import org.apache.kafka.test.MockProcessorSupplier;
import org.apache.kafka.test.TestUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
public class KTableMapValuesTest {
final private Serde<String> stringSerde = Serdes.String();
private KStreamTestDriver driver = null;
private File stateDir = null;
@After
public void tearDown() {
if (driver != null) {
driver.close();
}
driver = null;
}
@Before
public void setUp() throws IOException {
stateDir = TestUtils.tempDirectory("kafka-test");
}
private void doTestKTable(final KStreamBuilder builder, final String topic1, final MockProcessorSupplier<String, Integer> proc2) {
driver = new KStreamTestDriver(builder, stateDir, Serdes.String(), Serdes.String());
driver.process(topic1, "A", "1");
driver.process(topic1, "B", "2");
driver.process(topic1, "C", "3");
driver.process(topic1, "D", "4");
driver.flushState();
assertEquals(Utils.mkList("A:1", "B:2", "C:3", "D:4"), proc2.processed);
}
@Test
public void testKTable() {
final KStreamBuilder builder = new KStreamBuilder();
String topic1 = "topic1";
KTable<String, String> table1 = builder.table(stringSerde, stringSerde, topic1, "anyStoreName");
KTable<String, Integer> table2 = table1.mapValues(new ValueMapper<CharSequence, Integer>() {
@Override
public Integer apply(CharSequence value) {
return value.charAt(0) - 48;
}
});
MockProcessorSupplier<String, Integer> proc2 = new MockProcessorSupplier<>();
table2.toStream().process(proc2);
doTestKTable(builder, topic1, proc2);
}
@Test
public void testQueryableKTable() {
final KStreamBuilder builder = new KStreamBuilder();
String topic1 = "topic1";
KTable<String, String> table1 = builder.table(stringSerde, stringSerde, topic1, "anyStoreName");
KTable<String, Integer> table2 = table1.mapValues(new ValueMapper<CharSequence, Integer>() {
@Override
public Integer apply(CharSequence value) {
return value.charAt(0) - 48;
}
}, Serdes.Integer(), "anyName");
MockProcessorSupplier<String, Integer> proc2 = new MockProcessorSupplier<>();
table2.toStream().process(proc2);
doTestKTable(builder, topic1, proc2);
}
private void doTestValueGetter(final KStreamBuilder builder,
final String topic1,
final KTableImpl<String, String, String> table1,
final KTableImpl<String, String, Integer> table2,
final KTableImpl<String, Integer, Integer> table3,
final KTableImpl<String, String, String> table4) {
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, Serdes.String(), Serdes.String());
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"));
}
@Test
public void testValueGetter() throws IOException {
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);
doTestValueGetter(builder, topic1, table1, table2, table3, table4);
}
@Test
public void testQueryableValueGetter() throws IOException {
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);
}
}, Serdes.Integer(), "anyMapName");
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;
}
}, "anyFilterName");
KTableImpl<String, String, String> table4 = (KTableImpl<String, String, String>)
table1.through(stringSerde, stringSerde, topic2, storeName2);
doTestValueGetter(builder, topic1, table1, table2, table3, table4);
}
@Test
public void testNotSendingOldValue() throws IOException {
KStreamBuilder builder = new KStreamBuilder();
String topic1 = "topic1";
KTableImpl<String, String, String> table1 =
(KTableImpl<String, String, String>) builder.table(stringSerde, stringSerde, topic1, "anyStoreName");
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);
}
});
MockProcessorSupplier<String, Integer> proc = new MockProcessorSupplier<>();
builder.addProcessor("proc", proc, table2.name);
driver = new KStreamTestDriver(builder, stateDir, null, null);
assertFalse(table1.sendingOldValueEnabled());
assertFalse(table2.sendingOldValueEnabled());
driver.process(topic1, "A", "01");
driver.process(topic1, "B", "01");
driver.process(topic1, "C", "01");
driver.flushState();
proc.checkAndClearProcessResult("A:(1<-null)", "B:(1<-null)", "C:(1<-null)");
driver.process(topic1, "A", "02");
driver.process(topic1, "B", "02");
driver.flushState();
proc.checkAndClearProcessResult("A:(2<-null)", "B:(2<-null)");
driver.process(topic1, "A", "03");
driver.flushState();
proc.checkAndClearProcessResult("A:(3<-null)");
driver.process(topic1, "A", null);
driver.flushState();
proc.checkAndClearProcessResult("A:(null<-null)");
}
@Test
public void testSendingOldValue() throws IOException {
KStreamBuilder builder = new KStreamBuilder();
String topic1 = "topic1";
KTableImpl<String, String, String> table1 =
(KTableImpl<String, String, String>) builder.table(stringSerde, stringSerde, topic1, "anyStoreName");
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);
}
});
table2.enableSendingOldValues();
MockProcessorSupplier<String, Integer> proc = new MockProcessorSupplier<>();
builder.addProcessor("proc", proc, table2.name);
driver = new KStreamTestDriver(builder, stateDir, null, null);
assertTrue(table1.sendingOldValueEnabled());
assertTrue(table2.sendingOldValueEnabled());
driver.process(topic1, "A", "01");
driver.process(topic1, "B", "01");
driver.process(topic1, "C", "01");
driver.flushState();
proc.checkAndClearProcessResult("A:(1<-null)", "B:(1<-null)", "C:(1<-null)");
driver.process(topic1, "A", "02");
driver.process(topic1, "B", "02");
driver.flushState();
proc.checkAndClearProcessResult("A:(2<-1)", "B:(2<-1)");
driver.process(topic1, "A", "03");
driver.flushState();
proc.checkAndClearProcessResult("A:(3<-2)");
driver.process(topic1, "A", null);
driver.flushState();
proc.checkAndClearProcessResult("A:(null<-3)");
}
}