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* 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.flink.runtime.state.heap;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.functions.AggregateFunction;
import org.apache.flink.api.common.state.AggregatingState;
import org.apache.flink.api.common.state.AggregatingStateDescriptor;
import org.apache.flink.api.common.typeutils.base.IntSerializer;
import org.apache.flink.runtime.state.VoidNamespace;
import org.apache.flink.runtime.state.VoidNamespaceSerializer;
import org.apache.flink.runtime.state.internal.InternalAggregatingState;
import org.junit.Test;
import static java.util.Arrays.asList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
/**
* Tests for the simple Java heap objects implementation of the {@link AggregatingState}.
*/
public class HeapAggregatingStateTest extends HeapStateBackendTestBase {
@Test
public void testAddAndGet() throws Exception {
final AggregatingStateDescriptor<Long, MutableLong, Long> stateDescr =
new AggregatingStateDescriptor<>("my-state", new AddingFunction(), MutableLong.class);
stateDescr.initializeSerializerUnlessSet(new ExecutionConfig());
final HeapKeyedStateBackend<String> keyedBackend = createKeyedBackend();
try {
InternalAggregatingState<VoidNamespace, Long, Long> state =
keyedBackend.createAggregatingState(VoidNamespaceSerializer.INSTANCE, stateDescr);
state.setCurrentNamespace(VoidNamespace.INSTANCE);
keyedBackend.setCurrentKey("abc");
assertNull(state.get());
keyedBackend.setCurrentKey("def");
assertNull(state.get());
state.add(17L);
state.add(11L);
assertEquals(28L, state.get().longValue());
keyedBackend.setCurrentKey("abc");
assertNull(state.get());
keyedBackend.setCurrentKey("g");
assertNull(state.get());
state.add(1L);
state.add(2L);
keyedBackend.setCurrentKey("def");
assertEquals(28L, state.get().longValue());
state.clear();
assertNull(state.get());
keyedBackend.setCurrentKey("g");
state.add(3L);
state.add(2L);
state.add(1L);
keyedBackend.setCurrentKey("def");
assertNull(state.get());
keyedBackend.setCurrentKey("g");
assertEquals(9L, state.get().longValue());
state.clear();
// make sure all lists / maps are cleared
StateTable<String, VoidNamespace, MutableLong> stateTable =
((HeapAggregatingState<String, VoidNamespace, Long, MutableLong, Long>) state).stateTable;
assertTrue(stateTable.isEmpty());
}
finally {
keyedBackend.close();
keyedBackend.dispose();
}
}
@Test
public void testMerging() throws Exception {
final AggregatingStateDescriptor<Long, MutableLong, Long> stateDescr =
new AggregatingStateDescriptor<>("my-state", new AddingFunction(), MutableLong.class);
stateDescr.initializeSerializerUnlessSet(new ExecutionConfig());
final Integer namespace1 = 1;
final Integer namespace2 = 2;
final Integer namespace3 = 3;
final Long expectedResult = 165L;
final HeapKeyedStateBackend<String> keyedBackend = createKeyedBackend();
try {
InternalAggregatingState<Integer, Long, Long> state =
keyedBackend.createAggregatingState(IntSerializer.INSTANCE, stateDescr);
// populate the different namespaces
// - abc spreads the values over three namespaces
// - def spreads teh values over two namespaces (one empty)
// - ghi is empty
// - jkl has all elements already in the target namespace
// - mno has all elements already in one source namespace
keyedBackend.setCurrentKey("abc");
state.setCurrentNamespace(namespace1);
state.add(33L);
state.add(55L);
state.setCurrentNamespace(namespace2);
state.add(22L);
state.add(11L);
state.setCurrentNamespace(namespace3);
state.add(44L);
keyedBackend.setCurrentKey("def");
state.setCurrentNamespace(namespace1);
state.add(11L);
state.add(44L);
state.setCurrentNamespace(namespace3);
state.add(22L);
state.add(55L);
state.add(33L);
keyedBackend.setCurrentKey("jkl");
state.setCurrentNamespace(namespace1);
state.add(11L);
state.add(22L);
state.add(33L);
state.add(44L);
state.add(55L);
keyedBackend.setCurrentKey("mno");
state.setCurrentNamespace(namespace3);
state.add(11L);
state.add(22L);
state.add(33L);
state.add(44L);
state.add(55L);
keyedBackend.setCurrentKey("abc");
state.mergeNamespaces(namespace1, asList(namespace2, namespace3));
state.setCurrentNamespace(namespace1);
assertEquals(expectedResult, state.get());
keyedBackend.setCurrentKey("def");
state.mergeNamespaces(namespace1, asList(namespace2, namespace3));
state.setCurrentNamespace(namespace1);
assertEquals(expectedResult, state.get());
keyedBackend.setCurrentKey("ghi");
state.mergeNamespaces(namespace1, asList(namespace2, namespace3));
state.setCurrentNamespace(namespace1);
assertNull(state.get());
keyedBackend.setCurrentKey("jkl");
state.mergeNamespaces(namespace1, asList(namespace2, namespace3));
state.setCurrentNamespace(namespace1);
assertEquals(expectedResult, state.get());
keyedBackend.setCurrentKey("mno");
state.mergeNamespaces(namespace1, asList(namespace2, namespace3));
state.setCurrentNamespace(namespace1);
assertEquals(expectedResult, state.get());
// make sure all lists / maps are cleared
keyedBackend.setCurrentKey("abc");
state.setCurrentNamespace(namespace1);
state.clear();
keyedBackend.setCurrentKey("def");
state.setCurrentNamespace(namespace1);
state.clear();
keyedBackend.setCurrentKey("ghi");
state.setCurrentNamespace(namespace1);
state.clear();
keyedBackend.setCurrentKey("jkl");
state.setCurrentNamespace(namespace1);
state.clear();
keyedBackend.setCurrentKey("mno");
state.setCurrentNamespace(namespace1);
state.clear();
StateTable<String, Integer, MutableLong> stateTable =
((HeapAggregatingState<String, Integer, Long, MutableLong, Long>) state).stateTable;
assertTrue(stateTable.isEmpty());
}
finally {
keyedBackend.close();
keyedBackend.dispose();
}
}
// ------------------------------------------------------------------------
// test functions
// ------------------------------------------------------------------------
@SuppressWarnings("serial")
private static class AddingFunction implements AggregateFunction<Long, MutableLong, Long> {
@Override
public MutableLong createAccumulator() {
return new MutableLong();
}
@Override
public void add(Long value, MutableLong accumulator) {
accumulator.value += value;
}
@Override
public Long getResult(MutableLong accumulator) {
return accumulator.value;
}
@Override
public MutableLong merge(MutableLong a, MutableLong b) {
a.value += b.value;
return a;
}
}
private static final class MutableLong {
long value;
}
}