/
MockContext.java
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/
MockContext.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.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.typeutils.TypeExtractor;
import org.apache.flink.streaming.api.StreamConfig;
import org.apache.flink.streaming.api.invokable.StreamInvokable;
import org.apache.flink.streaming.api.streamrecord.StreamRecord;
import org.apache.flink.streaming.api.streamrecord.StreamRecordSerializer;
import org.apache.flink.streaming.api.streamvertex.StreamTaskContext;
import org.apache.flink.streaming.io.CoReaderIterator;
import org.apache.flink.streaming.io.IndexedReaderIterator;
import org.apache.flink.util.Collector;
import org.apache.flink.util.MutableObjectIterator;
public class MockContext<IN, OUT> implements StreamTaskContext<OUT> {
private Collection<IN> inputs;
private List<OUT> outputs;
private Collector<OUT> collector;
private StreamRecordSerializer<IN> inDeserializer;
private IndexedReaderIterator<StreamRecord<IN>> iterator;
public MockContext(Collection<IN> inputs) {
this.inputs = inputs;
if (inputs.isEmpty()) {
throw new RuntimeException("Inputs must not be empty");
}
TypeInformation<IN> inTypeInfo = TypeExtractor.getForObject(inputs.iterator().next());
inDeserializer = new StreamRecordSerializer<IN>(inTypeInfo, new ExecutionConfig());
iterator = new IndexedInputIterator();
outputs = new ArrayList<OUT>();
collector = new MockCollector<OUT>(outputs);
}
private class IndexedInputIterator extends IndexedReaderIterator<StreamRecord<IN>> {
Iterator<IN> listIterator;
public IndexedInputIterator() {
super(null, null);
listIterator = inputs.iterator();
}
@Override
public StreamRecord<IN> next(StreamRecord<IN> reuse) throws IOException {
if (listIterator.hasNext()) {
reuse.setObject(listIterator.next());
} else {
reuse = null;
}
return reuse;
}
@Override
public StreamRecord<IN> next() throws IOException {
if (listIterator.hasNext()) {
StreamRecord<IN> result = new StreamRecord<IN>();
result.setObject(listIterator.next());
return result;
} else {
return null;
}
}
@Override
public int getLastChannelIndex() {
return 0;
}
}
public List<OUT> getOutputs() {
return outputs;
}
public Collector<OUT> getCollector() {
return collector;
}
public StreamRecordSerializer<IN> getInDeserializer() {
return inDeserializer;
}
public MutableObjectIterator<StreamRecord<IN>> getIterator() {
return iterator;
}
public static <IN, OUT> List<OUT> createAndExecute(StreamInvokable<IN, OUT> invokable,
List<IN> inputs) {
MockContext<IN, OUT> mockContext = new MockContext<IN, OUT>(inputs);
invokable.setup(mockContext);
try {
invokable.open(null);
invokable.invoke();
invokable.close();
} catch (Exception e) {
throw new RuntimeException("Cannot invoke invokable.", e);
}
return mockContext.getOutputs();
}
@Override
public StreamConfig getConfig() {
return null;
}
@Override
public ClassLoader getUserCodeClassLoader() {
return null;
}
@SuppressWarnings("unchecked")
@Override
public <X> MutableObjectIterator<X> getInput(int index) {
if (index == 0) {
return (MutableObjectIterator<X>) iterator;
} else {
throw new IllegalArgumentException("There is only 1 input");
}
}
@SuppressWarnings("unchecked")
@Override
public <X> StreamRecordSerializer<X> getInputSerializer(int index) {
if (index == 0) {
return (StreamRecordSerializer<X>) inDeserializer;
} else {
throw new IllegalArgumentException("There is only 1 input");
}
}
@Override
public Collector<OUT> getOutputCollector() {
return collector;
}
@Override
public <X, Y> CoReaderIterator<X, Y> getCoReader() {
throw new IllegalArgumentException("CoReader not available");
}
@SuppressWarnings("unchecked")
@Override
public <X> IndexedReaderIterator<X> getIndexedInput(int index) {
return (IndexedReaderIterator<X>) iterator;
}
@Override
public ExecutionConfig getExecutionConfig() {
return new ExecutionConfig();
}
}