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TestingSourceOperator.java
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TestingSourceOperator.java
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/*
* 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.flink.streaming.api.operators.source;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.state.OperatorStateStore;
import org.apache.flink.api.connector.source.SourceReader;
import org.apache.flink.api.connector.source.mocks.MockSourceSplit;
import org.apache.flink.api.connector.source.mocks.MockSourceSplitSerializer;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.core.fs.CloseableRegistry;
import org.apache.flink.runtime.metrics.groups.UnregisteredMetricGroups;
import org.apache.flink.runtime.operators.coordination.MockOperatorEventGateway;
import org.apache.flink.runtime.operators.coordination.OperatorEventGateway;
import org.apache.flink.runtime.operators.testutils.MockEnvironmentBuilder;
import org.apache.flink.runtime.operators.testutils.MockInputSplitProvider;
import org.apache.flink.runtime.state.StateInitializationContext;
import org.apache.flink.runtime.state.StateInitializationContextImpl;
import org.apache.flink.runtime.state.TestTaskStateManager;
import org.apache.flink.runtime.state.hashmap.HashMapStateBackend;
import org.apache.flink.streaming.api.operators.SourceOperator;
import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService;
import org.apache.flink.streaming.runtime.tasks.SourceOperatorStreamTask;
import org.apache.flink.streaming.runtime.tasks.StreamMockEnvironment;
import org.apache.flink.streaming.runtime.tasks.TestProcessingTimeService;
import org.apache.flink.streaming.util.MockOutput;
import org.apache.flink.streaming.util.MockStreamConfig;
import org.apache.flink.streaming.util.MockStreamingRuntimeContext;
import java.util.ArrayList;
import java.util.Collections;
/** A SourceOperator extension to simplify test setup. */
public class TestingSourceOperator<T> extends SourceOperator<T, MockSourceSplit> {
private static final long serialVersionUID = 1L;
private final int subtaskIndex;
private final int parallelism;
public TestingSourceOperator(
SourceReader<T, MockSourceSplit> reader,
WatermarkStrategy<T> watermarkStrategy,
ProcessingTimeService timeService,
boolean emitProgressiveWatermarks) {
this(
reader,
watermarkStrategy,
timeService,
new MockOperatorEventGateway(),
1,
5,
emitProgressiveWatermarks);
}
public TestingSourceOperator(
SourceReader<T, MockSourceSplit> reader,
WatermarkStrategy<T> watermarkStrategy,
ProcessingTimeService timeService,
OperatorEventGateway eventGateway,
int subtaskIndex,
int parallelism,
boolean emitProgressiveWatermarks) {
super(
(context) -> reader,
eventGateway,
new MockSourceSplitSerializer(),
watermarkStrategy,
timeService,
new Configuration(),
"localhost",
emitProgressiveWatermarks,
() -> true);
this.subtaskIndex = subtaskIndex;
this.parallelism = parallelism;
this.metrics = UnregisteredMetricGroups.createUnregisteredOperatorMetricGroup();
initSourceMetricGroup();
// unchecked wrapping is okay to keep tests simpler
try {
initReader();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public StreamingRuntimeContext getRuntimeContext() {
return new MockStreamingRuntimeContext(false, parallelism, subtaskIndex);
}
// this is overridden to avoid complex mock injection through the "containingTask"
@Override
public ExecutionConfig getExecutionConfig() {
ExecutionConfig cfg = new ExecutionConfig();
cfg.setAutoWatermarkInterval(100);
return cfg;
}
public static <T> SourceOperator<T, MockSourceSplit> createTestOperator(
SourceReader<T, MockSourceSplit> reader,
WatermarkStrategy<T> watermarkStrategy,
boolean emitProgressiveWatermarks)
throws Exception {
final OperatorStateStore operatorStateStore =
new HashMapStateBackend()
.createOperatorStateBackend(
new MockEnvironmentBuilder().build(),
"test-operator",
Collections.emptyList(),
new CloseableRegistry());
final StateInitializationContext stateContext =
new StateInitializationContextImpl(null, operatorStateStore, null, null, null);
TestProcessingTimeService timeService = new TestProcessingTimeService();
timeService.setCurrentTime(Integer.MAX_VALUE); // start somewhere that is not zero
final SourceOperator<T, MockSourceSplit> sourceOperator =
new TestingSourceOperator<>(
reader, watermarkStrategy, timeService, emitProgressiveWatermarks);
sourceOperator.setup(
new SourceOperatorStreamTask<Integer>(
new StreamMockEnvironment(
new Configuration(),
new Configuration(),
new ExecutionConfig(),
1L,
new MockInputSplitProvider(),
1,
new TestTaskStateManager())),
new MockStreamConfig(new Configuration(), 1),
new MockOutput<>(new ArrayList<>()));
sourceOperator.initializeState(stateContext);
sourceOperator.open();
return sourceOperator;
}
}