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TestSequentialReadingStreamOperator.java
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TestSequentialReadingStreamOperator.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 org.apache.flink.streaming.api.operators.AbstractStreamOperator;
import org.apache.flink.streaming.api.operators.BoundedMultiInput;
import org.apache.flink.streaming.api.operators.InputSelectable;
import org.apache.flink.streaming.api.operators.InputSelection;
import org.apache.flink.streaming.api.operators.TwoInputStreamOperator;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
/**
* A test operator class for sequential reading.
*/
public class TestSequentialReadingStreamOperator extends AbstractStreamOperator<String>
implements TwoInputStreamOperator<String, Integer, String>, InputSelectable, BoundedMultiInput {
private final String name;
private InputSelection inputSelection;
public TestSequentialReadingStreamOperator(String name) {
super();
this.name = name;
this.inputSelection = InputSelection.FIRST;
}
@Override
public InputSelection nextSelection() {
return inputSelection;
}
@Override
public void processElement1(StreamRecord<String> element) {
output.collect(element.replace("[" + name + "-1]: " + element.getValue()));
}
@Override
public void processElement2(StreamRecord<Integer> element) {
output.collect(element.replace("[" + name + "-2]: " + element.getValue()));
}
@Override
public void endInput(int inputId) {
if (inputId == 1) {
inputSelection = InputSelection.SECOND;
}
}
}