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CC00023.flink——|Hadoop&Flink.V07|——|Flink.v07|API详解|Flink DataStream|

一、Flink DataStream常用API:Transformation

### --- 编程实现:ConnectDemo.java

package com.yanqi.streamtransformation;

import com.yanqi.streamdatasource.SelfSourceParallel;
import com.yanqi.streamdatasource.SelfSourceParallelExtendsRich;
import org.apache.flink.streaming.api.datastream.ConnectedStreams;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.co.CoMapFunction;

public class ConnectDemo {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        DataStreamSource<String> data1 = env.addSource(new SelfSourceParallel());
        DataStreamSource<String> data2 = env.addSource(new SelfSourceParallelExtendsRich());
        ConnectedStreams<String, String> connected = data1.connect(data2);
        SingleOutputStreamOperator<String> maped = connected.map(new CoMapFunction<String, String, String>() {
            @Override
            public String map1(String value) throws Exception {
                return value;
            }

            @Override
            public String map2(String value) throws Exception {
                return value;
            }
        });

        maped.print();
        env.execute();

    }
}
           
### --- 编译打印

D:\JAVA\jdk1.8.0_231\bin\java.exe "-javaagent:D:\IntelliJIDEA\IntelliJ IDEA 2019.3.3\lib\idea_rt.jar=52354:D:\IntelliJIDEA\IntelliJ IDEA 2019.3.3\bin" -Dfile.encoding=UTF-8 -classpath 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onnector-java-8.0.21.jar;C:\Users\Administrator\.m2\repository\org\apache\flink\flink-cep_2.12\1.11.1\flink-cep_2.12-1.11.1.jar;C:\Users\Administrator\.m2\repository\org\apache\flink\flink-json\1.11.1\flink-json-1.11.1.jar;C:\Users\Administrator\.m2\repository\org\apache\flink\flink-csv\1.11.1\flink-csv-1.11.1.jar;C:\Users\Administrator\.m2\repository\org\apache\flink\flink-orc_2.12\1.11.1\flink-orc_2.12-1.11.1.jar;C:\Users\Administrator\.m2\repository\org\apache\orc\orc-core\1.5.6\orc-core-1.5.6.jar;C:\Users\Administrator\.m2\repository\org\apache\orc\orc-shims\1.5.6\orc-shims-1.5.6.jar;C:\Users\Administrator\.m2\repository\io\airlift\aircompressor\0.10\aircompressor-0.10.jar;C:\Users\Administrator\.m2\repository\org\apache\hive\hive-storage-api\2.6.0\hive-storage-api-2.6.0.jar;C:\Users\Administrator\.m2\repository\org\apache\flink\flink-hbase_2.12\1.10.2\flink-hbase_2.12-1.10.2.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-server\1.4.3\hbase-server-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-common\1.4.3\hbase-common-1.4.3.jar;C:\Users\Administrator\.m2\repository\com\github\stephenc\findbugs\findbugs-annotations\1.3.9-1\findbugs-annotations-1.3.9-1.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-protocol\1.4.3\hbase-protocol-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-procedure\1.4.3\hbase-procedure-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-common\1.4.3\hbase-common-1.4.3-tests.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-client\1.4.3\hbase-client-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-prefix-tree\1.4.3\hbase-prefix-tree-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-metrics-api\1.4.3\hbase-metrics-api-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-metrics\1.4.3\hbase-metrics-1.4.3.jar;C:\Users\Administrator\.m2\repository\io\dropwizard\metrics\metrics-core\3.1.2\metrics-core-3.1.2.jar;C:\Users\Administrator\.m2\repository\commons-httpclient\commons-httpclient\3.1\commons-httpclient-3.1.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-hadoop-compat\1.4.3\hbase-hadoop-compat-1.4.3.jar;C:\Users\Administrator\.m2\repository\org\apache\hbase\hbase-hadoop2-compat\1.4.3\hbase-hadoop2-compat-1.4.3.jar;C:\Users\Administrator\.m2\repository\com\yammer\metrics\metrics-core\2.2.0\metrics-core-2.2.0.jar;C:\Users\Administrator\.m2\repository\org\apache\commons\commons-math\2.2\commons-math-2.2.jar;C:\Users\Administrator\.m2\repository\org\apache\htrace\htrace-core\3.1.0-incubating\htrace-core-3.1.0-incubating.jar;C:\Users\Administrator\.m2\repository\com\lmax\disruptor\3.3.0\disruptor-3.3.0.jar;C:\Users\Administrator\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\Administrator\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\Administrator\.m2\repository\org\postgresql\postgresql\42.2.16\postgresql-42.2.16.jar;C:\Users\Administrator\.m2\repository\org\checkerframework\checker-qual\3.5.0\checker-qual-3.5.0.jar;C:\Users\Administrator\.m2\repository\com\github\housepower\clickhouse-native-jdbc\1.6-stable\clickhouse-native-jdbc-1.6-stable.jar;C:\Users\Administrator\.m2\repository\net\jpountz\lz4\lz4\1.3.0\lz4-1.3.0.jar;C:\Users\Administrator\.m2\repository\joda-time\joda-time\2.9.9\joda-time-2.9.9.jar;C:\Users\Administrator\.m2\repository\org\apache\kudu\kudu-client\1.5.0\kudu-client-1.5.0.jar;C:\Users\Administrator\.m2\repository\com\stumbleupon\async\1.4.1\async-1.4.1.jar;C:\Users\Administrator\.m2\repository\org\apache\yetus\audience-annotations\0.4.0\audience-annotations-0.4.0.jar com.yanqi.streamtransformation.ConnectDemo

1> 0
3> 0...from Rich
2> 0
2> 0...from Rich
3> 0
1> 0...from Rich
4> 0
4> 0...from Rich
~~~输出参数
4> 4...from Rich
2> 5...from Rich
3> 5...from Rich
2> 5
3> 5
1> 5
4> 5
1> 5...from Rich
4> 5...from Rich
           

二、Flink DataStream常用API:Transformation

### --- 编程实现:SplitSelectDemo.java

package com.yanqi.streamtransformation;

import org.apache.flink.streaming.api.collector.selector.OutputSelector;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SplitStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

import java.util.ArrayList;

public class SplitSelectDemo {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        DataStreamSource<Integer> data = env.fromElements(1, 2, 3, 4, 5, 6, 7, 8, 9);
        SplitStream<Integer> splited = data.split(new OutputSelector<Integer>() {
            @Override
            public Iterable<String> select(Integer value) {
                ArrayList<String> output = new ArrayList<>();
                if (value % 2 == 0) {
                    output.add("even");
                } else {
                    output.add("odd");
                }
                return output;
            }
        });

        DataStream<Integer> event = splited.select("even");
        event.print();
        env.execute();
    }
}
           
### --- 编译打印

D:\JAVA\jdk1.8.0_231\bin\java.exe "-javaagent:D:\IntelliJIDEA\IntelliJ IDEA 2019.3.3\lib\idea_rt.jar=52433:D:\IntelliJIDEA\IntelliJ IDEA 2019.3.3\bin" -Dfile.encoding=UTF-8 -classpath 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com.yanqi.streamtransformation.SplitSelectDemo
~~~输出参数
2> 2
3> 4
4> 6
1> 8