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April 19, 2016 09:53
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package org.stsffap; | |
import org.apache.flink.api.common.functions.JoinFunction; | |
import org.apache.flink.api.common.functions.MapFunction; | |
import org.apache.flink.api.java.functions.KeySelector; | |
import org.apache.flink.api.java.tuple.Tuple2; | |
import org.apache.flink.streaming.api.TimeCharacteristic; | |
import org.apache.flink.streaming.api.datastream.DataStream; | |
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; | |
import org.apache.flink.streaming.api.functions.AssignerWithPunctuatedWatermarks; | |
import org.apache.flink.streaming.api.watermark.Watermark; | |
import org.apache.flink.streaming.api.windowing.assigners.TumblingEventTimeWindows; | |
import org.apache.flink.streaming.api.windowing.time.Time; | |
import javax.annotation.Nullable; | |
/** | |
* 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. | |
*/ | |
public class Job { | |
public static void main(String[] args) throws Exception { | |
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); | |
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime); | |
DataStream<Tuple2<Integer, Integer>> input1 = env.fromElements(2, 4, 5, 6, 9, 11).map(new MapFunction<Integer, Tuple2<Integer, Integer>>() { | |
@Override | |
public Tuple2<Integer, Integer> map(Integer integer) throws Exception { | |
return Tuple2.of(integer % 4, integer); | |
} | |
}).assignTimestampsAndWatermarks(new AssignerWithPunctuatedWatermarks<Tuple2<Integer, Integer>>() { | |
@Nullable | |
@Override | |
public Watermark checkAndGetNextWatermark(Tuple2<Integer, Integer> lastElement, long extractedTimestamp) { | |
return new Watermark(extractedTimestamp); | |
} | |
@Override | |
public long extractTimestamp(Tuple2<Integer, Integer> element, long previousElementTimestamp) { | |
return element.f1; | |
} | |
}); | |
DataStream<Tuple2<Integer, Integer>> input2 = env.fromElements(2, 4, 5, 6, 9, 11).map(new MapFunction<Integer, Tuple2<Integer, Integer>>() { | |
@Override | |
public Tuple2<Integer, Integer> map(Integer integer) throws Exception { | |
return Tuple2.of(integer % 4, integer); | |
} | |
}).assignTimestampsAndWatermarks(new AssignerWithPunctuatedWatermarks<Tuple2<Integer, Integer>>() { | |
@Nullable | |
@Override | |
public Watermark checkAndGetNextWatermark(Tuple2<Integer, Integer> lastElement, long extractedTimestamp) { | |
return new Watermark(extractedTimestamp); | |
} | |
@Override | |
public long extractTimestamp(Tuple2<Integer, Integer> element, long previousElementTimestamp) { | |
return element.f1; | |
} | |
}); | |
DataStream<Tuple2<Integer, Integer>> input3 = env.fromElements(2, 4, 5, 6, 9, 11).map(new MapFunction<Integer, Tuple2<Integer, Integer>>() { | |
@Override | |
public Tuple2<Integer, Integer> map(Integer integer) throws Exception { | |
return Tuple2.of(integer % 4, integer); | |
} | |
}).assignTimestampsAndWatermarks(new AssignerWithPunctuatedWatermarks<Tuple2<Integer, Integer>>() { | |
@Nullable | |
@Override | |
public Watermark checkAndGetNextWatermark(Tuple2<Integer, Integer> lastElement, long extractedTimestamp) { | |
return new Watermark(extractedTimestamp); | |
} | |
@Override | |
public long extractTimestamp(Tuple2<Integer, Integer> element, long previousElementTimestamp) { | |
return element.f1; | |
} | |
}); | |
DataStream<Tuple2<Integer, Integer>> firstJoin = input1.join(input2).where(new KeySelector<Tuple2<Integer, Integer>, Integer>() { | |
@Override | |
public Integer getKey(Tuple2<Integer, Integer> integerIntegerTuple2) throws Exception { | |
return integerIntegerTuple2.f0; | |
} | |
}).equalTo(new KeySelector<Tuple2<Integer, Integer>, Integer>() { | |
@Override | |
public Integer getKey(Tuple2<Integer, Integer> integerIntegerTuple2) throws Exception { | |
return integerIntegerTuple2.f0; | |
} | |
}).window(TumblingEventTimeWindows.of(Time.milliseconds(5))).apply(new JoinFunction<Tuple2<Integer, Integer>, Tuple2<Integer, Integer>, Tuple2<Integer, Integer>>() { | |
@Override | |
public Tuple2<Integer, Integer> join(Tuple2<Integer, Integer> integerIntegerTuple2, Tuple2<Integer, Integer> integerIntegerTuple22) throws Exception { | |
return Tuple2.of(integerIntegerTuple2.f0, integerIntegerTuple2.f1 + integerIntegerTuple22.f1); | |
} | |
}); | |
DataStream<Tuple2<Integer, Integer>> secondJoin = firstJoin.join(input3).where(new KeySelector<Tuple2<Integer,Integer>, Integer>() { | |
@Override | |
public Integer getKey(Tuple2<Integer, Integer> integerIntegerTuple2) throws Exception { | |
return integerIntegerTuple2.f0; | |
} | |
}).equalTo(new KeySelector<Tuple2<Integer, Integer>, Integer>() { | |
@Override | |
public Integer getKey(Tuple2<Integer, Integer> integerIntegerTuple2) throws Exception { | |
return integerIntegerTuple2.f0; | |
} | |
}).window(TumblingEventTimeWindows.of(Time.milliseconds(5))).apply(new JoinFunction<Tuple2<Integer,Integer>, Tuple2<Integer,Integer>, Tuple2<Integer, Integer>>() { | |
@Override | |
public Tuple2<Integer, Integer> join(Tuple2<Integer, Integer> integerIntegerTuple2, Tuple2<Integer, Integer> integerIntegerTuple22) throws Exception { | |
return Tuple2.of(integerIntegerTuple2.f0, integerIntegerTuple22.f1 + integerIntegerTuple2.f1); | |
} | |
}); | |
secondJoin.print(); | |
env.execute(); | |
} | |
} |
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what`s the difference between them ?