Flink操练(四十三)之迟到元素
关键代码DataStream> watermarks = map.assignTimestampsAndWatermarks( WatermarkStrategy.>forMonotonousTimestamps() .withTimestampAssigner(new SerializableTimestampAssigner>() { @Override public long extractTimestamp(Tuple2 v, long recordTimestamp) { return v.f1; } }) ); DataStream process = watermarks.process(new ProcessFunction, String>() { @Override public void processElement(Tuple2 value, Context ctx, Collector out) throws Exception { if (value.f1 < ctx.timerService().currentWatermark()) { out.collect("元素迟到了" + value); } else { out.collect(value + "元素没有迟到!!!"); } } });完整代码package day05; import org.apache.flink.api.common.eventtime.SerializableTimestampAssigner; import org.apache.flink.api.common.eventtime.WatermarkStrategy; import org.apache.flink.api.common.functions.MapFunction; import org.apache.flink.api.java.tuple.Tuple2; import org.apache.flink.streaming.api.datastream.DataStream; import org.apache.flink.streaming.api.datastream.DataStreamSource; import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; import org.apache.flink.streaming.api.functions.ProcessFunction; import org.apache.flink.util.Collector; /** * @program: bigData_learn * @description: 什么是迟到元素 * @author: Mr.逗 * @create: 2021-09-24 10:24 **/ public class LateElement { public static void main(String[] args) { StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); env.setParallelism(1); DataStreamSource source = env.socketTextStream("172.17.0.50", 9999); DataStream> map = source.map(new MapFunction>() { @Override public Tuple2 map(String s) throws Exception { String[] arr = s.split(","); return Tuple2.of(arr[0], Long.parseLong(arr[1]) * 1000L); } }); DataStream> watermarks = map.assignTimestampsAndWatermarks( WatermarkStrategy.>forMonotonousTimestamps() .withTimestampAssigner(new SerializableTimestampAssigner>() { @Override public long extractTimestamp(Tuple2 v, long recordTimestamp) { return v.f1; } }) ); DataStream process = watermarks.process(new ProcessFunction, String>() { @Override public void processElement(Tuple2 value, Context ctx, Collector out) throws Exception { if (value.f1 < ctx.timerService().currentWatermark()) { out.collect("元素迟到了" + value); } else { out.collect(value + "元素没有迟到!!!"); } } }); process.print(); String name = LateElement.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=50693: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 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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 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.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-table-api-scala-bridge_2.121.13.0flink-table-api-scala-bridge_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-table-runtime-blink_2.121.13.0flink-table-runtime-blink_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgcodehausjaninojanino3.0.11janino-3.0.11.jar;G:appapache-maven-3.6.3maven-repositoryorgcodehausjaninocommons-compiler3.0.11commons-compiler-3.0.11.jar;G:appapache-maven-3.6.3maven-repositoryorgapachecalciteavaticaavatica-core1.17.0avatica-core-1.17.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-streaming-scala_2.121.13.0flink-streaming-scala_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-scala_2.121.13.0flink-scala_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgscala-langscala-reflect2.12.7scala-reflect-2.12.7.jar;G:appapache-maven-3.6.3maven-repositoryorgscala-langscala-library2.12.7scala-library-2.12.7.jar;G:appapache-maven-3.6.3maven-repositoryorgscala-langscala-compiler2.12.7scala-compiler-2.12.7.jar;G:appapache-maven-3.6.3maven-repositoryorgscala-langmodulesscala-xml_2.121.0.6scala-xml_2.12-1.0.6.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-table-common1.13.0flink-table-common-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-connector-files1.13.0flink-connector-files-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-shaded-asm-77.1-13.0flink-shaded-asm-7-7.1-13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-cep_2.121.13.0flink-cep_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-csv1.13.0flink-csv-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-connector-kafka_2.121.13.0flink-connector-kafka_2.12-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapachekafkakafka-clients2.4.1kafka-clients-2.4.1.jar;G:appapache-maven-3.6.3maven-repositorycomgithublubenzstd-jni1.4.3-1zstd-jni-1.4.3-1.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-connector-base1.13.0flink-connector-base-1.13.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapachebahirflink-connector-redis_2.111.0flink-connector-redis_2.11-1.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-streaming-java_2.111.2.0flink-streaming-java_2.11-1.2.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-runtime_2.111.2.0flink-runtime_2.11-1.2.0.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheflinkflink-shaded-hadoop21.2.0flink-shaded-hadoop2-1.2.0.jar;G:appapache-maven-3.6.3maven-repositoryorg 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.4java-xmlbuilder-0.4.jar;G:appapache-maven-3.6.3maven-repositorycommons-langcommons-lang2.6commons-lang-2.6.jar;G:appapache-maven-3.6.3maven-repositorycommons-configurationcommons-configuration1.7commons-configuration-1.7.jar;G:appapache-maven-3.6.3maven-repositorycommons-digestercommons-digester1.8.1commons-digester-1.8.1.jar;G:appapache-maven-3.6.3maven-repositoryorgcodehausjacksonjackson-core-asl1.8.8jackson-core-asl-1.8.8.jar;G:appapache-maven-3.6.3maven-repositoryorgcodehausjacksonjackson-mapper-asl1.8.8jackson-mapper-asl-1.8.8.jar;G:appapache-maven-3.6.3maven-repositoryorgapacheavroavro1.7.7avro-1.7.7.jar;G:appapache-maven-3.6.3maven-repositorycom houghtworksparanamerparanamer2.3paranamer-2.3.jar;G:appapache-maven-3.6.3maven-repositorycomjcraftjsch .1.42jsch-0.1.42.jar;G:appapache-maven-3.6.3maven-repositorycommons-beanutilscommons-beanutils-bean-collections1.8.3commons-beanutils-bean-collections-1.8.3.jar;G:appapache-maven-3.6.3maven-repositorycommons-daemoncommons-daemon1.0.13commons-daemon-1.0.13.jar;G:appapache-maven-3.6.3maven-repositoryjavaxxmlbindjaxb-api2.2.2jaxb-api-2.2.2.jar;G:appapache-maven-3.6.3maven-repositoryjavaxxmlstreamstax-api1.0-2stax-api-1.0-2.jar;G:appapache-maven-3.6.3maven-repositoryjavaxactivationactivation1.1activation-1.1.jar;G:appapache-maven-3.6.3maven-repositoryio 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.LateElement 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. (a,10000)元素没有迟到!!! (b,11000)元素没有迟到!!!