/**
* 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 com.alibaba.flink.performance.test;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.source.SourceFunction;
/**
* @author Jark (wuchong.wc@alibaba-inc.com)
*/
public class StreamSequence {
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
// get input data
DataStream<Long> text = env.addSource(new SequenceSource(10)).slotSharingGroup("123");
DataStream<Long> counts = text.map(new MapFunction<Long, Long>() {
@Override
public Long map(Long aLong) throws Exception {
return aLong;
}
});
// counts.print();
// counts.print();
// execute program
env.execute("StreamSequence");
}
public static class SequenceSource implements SourceFunction<Long> {
private volatile boolean active = true;
private int sendNumEachTime;
private long count = 0;
public SequenceSource(int sendNumEachTime) {
this.sendNumEachTime = sendNumEachTime;
}
@Override
public void run(SourceContext<Long> ctx) throws Exception {
while(active) {
int sendNum = sendNumEachTime;
while (--sendNum >= 0) {
++count;
ctx.collect(count);
}
}
}
@Override
public void cancel() {
}
}
}