Flink操练（四十四）之迟到元素发送到侧输出流

　　关键代码// 定义侧输出流的名字：侧输出标签     private static OutputTag lateElement = new OutputTag(＂late-element＂){};  SingleOutputStreamOperator result = source.process(new ProcessFunction, String>() {             @Override             public void processElement(Tuple2 value, Context ctx, Collector out) throws Exception {                 if (value.f1 < ctx.timerService().currentWatermark()) {                     //发送到侧输出流                     System.out.println(value.f1+＂*****＂+ctx.timerService().currentWatermark());                     ctx.output(lateElement, ＂迟到元素发送到侧输出流：＂ + value);                 } else {                     out.collect(＂正常到达的元素：＂ + value);                 }             }         });         result.print(＂主流：＂);         //打印侧输出流         result.getSideOutput(lateElement).print(＂侧输出：＂);完整代码package day05; import org.apache.flink.api.java.tuple.Tuple2; import org.apache.flink.streaming.api.datastream.DataStream; import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator; import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import org.apache.flink.streaming.api.functions.ProcessFunction; import org.apache.flink.streaming.api.functions.source.SourceFunction; import org.apache.flink.streaming.api.watermark.Watermark; import org.apache.flink.util.Collector; import org.apache.flink.util.OutputTag;  /**  * @program: bigData_learn  * @description: 迟到数据发送到侧输出流中去  * @author: Mr.逗  * @create: 2021-09-24 11:30  **/ public class LateDataBySideOutput {     // 定义侧输出流的名字：侧输出标签     private static OutputTag lateElement = new OutputTag(＂late-element＂){};     public static void main(String[] args) {         StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();         env.setParallelism(1);         DataStream> source = env.addSource(new SourceFunction>() {             @Override             public void run(SourceContext> ctx) throws Exception {                 // 指定时间戳发送数据                 ctx.collectWithTimestamp(Tuple2.of(＂hello world＂, 1000L), 1000L);                 //发送水位线                 ctx.emitWatermark(new Watermark(999L));                 ctx.collectWithTimestamp(Tuple2.of(＂hello flink＂, 2000L), 2000L);                 ctx.emitWatermark(new Watermark(1999L));                 ctx.collectWithTimestamp(Tuple2.of(＂hello late＂, 1000L), 1000L);             }             @Override             public void cancel() {             }         });         SingleOutputStreamOperator result = source.process(new ProcessFunction, String>() {             @Override             public void processElement(Tuple2 value, Context ctx, Collector out) throws Exception {                 if (value.f1 < ctx.timerService().currentWatermark()) {                     //发送到侧输出流                     System.out.println(value.f1+＂*****＂+ctx.timerService().currentWatermark());                     ctx.output(lateElement, ＂迟到元素发送到侧输出流：＂ + value);                 } else {                     out.collect(＂正常到达的元素：＂ + value);                 }             }         });         result.print(＂主流：＂);         //打印侧输出流         result.getSideOutput(lateElement).print(＂侧输出：＂);         String name = LateDataBySideOutput.class.getName();         try {             env.execute(name);          }catch (Exception e)         {             e.printStackTrace();         }     } } 结果展示＂C:Program FilesJavajdk1.8.0_191binjava.exe＂ ＂-javaagent:F:appIntelliJ IDEA 2019.3.3libidea_rt.jar=58772:F:appIntelliJ IDEA 2019.3.3bin＂ -Dfile.encoding=UTF-8 -classpath ＂C:Program FilesJavajdk1.8.0_191jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_191jrelibdeploy.jar;C:Program FilesJavajdk1.8.0_191jrelibextaccess-bridge-64.jar;C:Program FilesJavajdk1.8.0_191jrelibextcldrdata.jar;C:Program FilesJavajdk1.8.0_191jrelibextdnsns.jar;C:Program FilesJavajdk1.8.0_191jrelibextjaccess.jar;C:Program FilesJavajdk1.8.0_191jrelibextjfxrt.jar;C:Program FilesJavajdk1.8.0_191jrelibextlocaledata.jar;C:Program FilesJavajdk1.8.0_191jrelibext ashorn.jar;C:Program FilesJavajdk1.8.0_191jrelibextsunec.jar;C:Program FilesJavajdk1.8.0_191jrelibextsunjce_provider.jar;C:Program FilesJavajdk1.8.0_191jrelibextsunmscapi.jar;C:Program FilesJavajdk1.8.0_191jrelibextsunpkcs11.jar;C:Program FilesJavajdk1.8.0_191jrelibextzipfs.jar;C:Program FilesJavajdk1.8.0_191jrelibjavaws.jar;C:Program FilesJavajdk1.8.0_191jrelibjce.jar;C:Program FilesJavajdk1.8.0_191jrelibjfr.jar;C:Program FilesJavajdk1.8.0_191jrelibjfxswt.jar;C:Program FilesJavajdk1.8.0_191jrelibjsse.jar;C:Program FilesJavajdk1.8.0_191jrelibmanagement-agent.jar;C:Program FilesJavajdk1.8.0_191jrelibplugin.jar;C:Program FilesJavajdk1.8.0_191jrelibresources.jar;C:Program FilesJavajdk1.8.0_191jrelibrt.jar;G:bigData_learnFlink_learn	argetclasses;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-java1.13.0flink-java-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-core1.13.0flink-core-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-annotations1.13.0flink-annotations-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-metrics-core1.13.0flink-metrics-core-1.13.0.jar;G:appapache-maven-3.6.3maven-repositorycomesotericsoftwarekryokryo2.24.0kryo-2.24.0.jar;G:appapache-maven-3.6.3maven-repositorycomesotericsoftwareminlogminlog1.2minlog-1.2.jar;G:appapache-maven-3.6.3maven-repositoryorgobjenesisobjenesis2.1objenesis-2.1.jar;G:appapache-maven-3.6.3maven-repositorycommons-collectionscommons-collections3.2.2commons-collections-3.2.2.jar;G:appapache-maven-3.6.3maven-repositoryorgapachecommonscommons-compress1.20commons-compress-1.20.jar;G:appapache-maven-3.6.3maven-repositoryorgapachecommonscommons-lang33.3.2commons-lang3-3.3.2.jar;G:appapache-maven-3.6.3maven-repositoryorgapachecommonscommons-math33.5commons-math3-3.5.jar;G:appapache-maven-3.6.3maven-repositoryorgslf4jslf4j-api1.7.15slf4j-api-1.7.15.jar;G:appapache-maven-3.6.3maven-repositorycomgooglecodefindbugsjsr3051.3.9jsr305-1.3.9.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkforce-shading1.13.0force-shading-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-streaming-java_2.121.13.0flink-streaming-java_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-file-sink-common1.13.0flink-file-sink-common-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-runtime_2.121.13.0flink-runtime_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-queryable-state-client-java1.13.0flink-queryable-state-client-java-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-hadoop-fs1.13.0flink-hadoop-fs-1.13.0.jar;G:appapache-maven-3.6.3maven-repositorycommons-iocommons-io2.7commons-io-2.7.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-shaded-netty4.1.49.Final-13.0flink-shaded-netty-4.1.49.Final-13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-shaded-jackson2.12.1-13.0flink-shaded-jackson-2.12.1-13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-shaded-zookeeper-33.4.14-13.0flink-shaded-zookeeper-3-3.4.14-13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgjavassistjavassist3.24.0-GAjavassist-3.24.0-GA.jar;G:appapache-maven-3.6.3maven-repositorycom	ypesafeakkaakka-actor_2.122.5.21akka-actor_2.12-2.5.21.jar;G:appapache-maven-3.6.3maven-repositorycom	ypesafeconfig1.3.3config-1.3.3.jar;G:appapache-maven-3.6.3maven-repositoryorgscala-langmodulesscala-java8-compat_2.12.8.0scala-java8-compat_2.12-0.8.0.jar;G:appapache-maven-3.6.3maven-repositorycom	ypesafeakkaakka-stream_2.122.5.21akka-stream_2.12-2.5.21.jar;G:appapache-maven-3.6.3maven-repositoryorgreactivestreamsreactive-streams1.0.2reactive-streams-1.0.2.jar;G:appapache-maven-3.6.3maven-repositorycom	ypesafessl-config-core_2.12.3.7ssl-config-core_2.12-0.3.7.jar;G:appapache-maven-3.6.3maven-repositoryorgscala-langmodulesscala-parser-combinators_2.121.1.1scala-parser-combinators_2.12-1.1.1.jar;G:appapache-maven-3.6.3maven-repositorycom	ypesafeakkaakka-protobuf_2.122.5.21akka-protobuf_2.12-2.5.21.jar;G:appapache-maven-3.6.3maven-repositorycom	ypesafeakkaakka-slf4j_2.122.5.21akka-slf4j_2.12-2.5.21.jar;G:appapache-maven-3.6.3maven-repositoryorgclappergrizzled-slf4j_2.121.3.2grizzled-slf4j_2.12-1.3.2.jar;G:appapache-maven-3.6.3maven-repositorycomgithubscoptscopt_2.123.5.0scopt_2.12-3.5.0.jar;G:appapache-maven-3.6.3maven-repositoryorgxerialsnappysnappy-java1.1.8.3snappy-java-1.1.8.3.jar;G:appapache-maven-3.6.3maven-repositorycom	witterchill_2.12.7.6chill_2.12-0.7.6.jar;G:appapache-maven-3.6.3maven-repositorycom	witterchill-java.7.6chill-java-0.7.6.jar;G:appapache-maven-3.6.3maven-repositoryorglz4lz4-java1.6.0lz4-java-1.6.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-shaded-guava18.0-13.0flink-shaded-guava-18.0-13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-clients_2.121.13.0flink-clients_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-optimizer_2.121.13.0flink-optimizer_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositorycommons-clicommons-cli1.3.1commons-cli-1.3.1.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-table-api-java-bridge_2.121.13.0flink-table-api-java-bridge_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-table-api-java1.13.0flink-table-api-java-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-table-planner-blink_2.121.13.0flink-table-planner-blink_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-table-api-scala_2.121.13.0flink-table-api-scala_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-ta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etty etty-all4.0.27.Final etty-all-4.0.27.Final.jar;G:appapache-maven-3.6.3maven-repositorycomdata-artisansflakka-actor_2.112.3-customflakka-actor_2.11-2.3-custom.jar;G:appapache-maven-3.6.3maven-repositorycomdata-artisansflakka-remote_2.112.3-customflakka-remote_2.11-2.3-custom.jar;G:appapache-maven-3.6.3maven-repositoryio etty etty3.8.0.Final etty-3.8.0.Final.jar;G:appapache-maven-3.6.3maven-repositoryorguncommonsmathsuncommons-maths1.2.2auncommons-maths-1.2.2a.jar;G:appapache-maven-3.6.3maven-repositorycomdata-artisansflakka-slf4j_2.112.3-customflakka-slf4j_2.11-2.3-custom.jar;G:appapache-maven-3.6.3maven-repositoryorgclappergrizzled-slf4j_2.111.0.2grizzled-slf4j_2.11-1.0.2.jar;G:appapache-maven-3.6.3maven-repositorycomgithubscoptscopt_2.113.2.0scopt_2.11-3.2.0.jar;G:appapache-maven-3.6.3maven-repositorycomfasterxmljacksoncorejackson-core2.7.4jackson-core-2.7.4.jar;G:appapache-maven-3.6.3maven-repositorycomfasterxmljacksoncorejackson-databind2.7.4jackson-databind-2.7.4.jar;G:appapache-maven-3.6.3maven-repositorycomfasterxmljacksoncorejackson-annotations2.7.0jackson-annotations-2.7.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapachezookeeperzookeeper3.4.6zookeeper-3.4.6.jar;G:appapache-maven-3.6.3maven-repositoryjlinejline.9.94jline-0.9.94.jar;G:appapache-maven-3.6.3maven-repositoryjunitjunit3.8.1junit-3.8.1.jar;G:appapache-maven-3.6.3maven-repositorycom	witterchill_2.11.7.4chill_2.11-0.7.4.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-clients_2.111.2.0flink-clients_2.11-1.2.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-optimizer_2.111.2.0flink-optimizer_2.11-1.2.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheslingorg.apache.sling.commons.json2.0.6org.apache.sling.commons.json-2.0.6.jar;G:appapache-maven-3.6.3maven-repositorymysqlmysql-connector-java8.0.21mysql-connector-java-8.0.21.jar;G:appapache-maven-3.6.3maven-repositorycomgoogleprotobufprotobuf-java3.11.4protobuf-java-3.11.4.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-connector-jdbc_2.121.13.0flink-connector-jdbc_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgslf4jslf4j-log4j121.7.30slf4j-log4j12-1.7.30.jar;G:appapache-maven-3.6.3maven-repositorylog4jlog4j1.2.17log4j-1.2.17.jar;G:appapache-maven-3.6.3maven-repositoryorgapachelogginglog4jlog4j-to-slf4j2.14.0log4j-to-slf4j-2.14.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapachelogginglog4jlog4j-api2.14.0log4j-api-2.14.0.jar;G:appapache-maven-3.6.3maven-repositoryredisclientsjedis2.9.0jedis-2.9.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapachecommonscommons-pool22.4.2commons-pool2-2.4.2.jar;G:appapache-maven-3.6.3maven-repositorycomgooglecodegsongson2.8.5gson-2.8.5.jar＂ day05.LateDataBySideOutput log4j:WARN No appenders could be found for logger (org.apache.flink.api.java.ClosureCleaner). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 主流：> 正常到达的元素：(hello world,1000) 主流：> 正常到达的元素：(hello flink,2000) 1000*****1999 侧输出：> 迟到元素发送到侧输出流：(hello late,1000)  Process finished with exit code 0