{"id":103434,"date":"2026-09-10T14:01:05","date_gmt":"2026-09-10T06:01:05","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/103434.html"},"modified":"2026-09-10T14:01:05","modified_gmt":"2026-09-10T06:01:05","slug":"flink%e5%9f%ba%e7%a1%80%e4%b9%8bsink-api%e8%af%a6%e8%a7%a3%e5%8f%8a%e4%bb%a3%e7%a0%81%e5%ae%9e%e6%88%98%e6%bc%94%e7%bb%83%ef%bc%9a%e6%95%b0%e6%8d%ae%e5%87%ba%e5%8f%a3%e7%9a%84%e6%9c%80%e5%90%8e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/103434.html","title":{"rendered":"Flink\u57fa\u7840\u4e4bSink API\u8be6\u89e3\u53ca\u4ee3\u7801\u5b9e\u6218\u6f14\u7ec3\uff1a\u6570\u636e\u51fa\u53e3\u7684\u6700\u540e\u4e00\u516c\u91cc"},"content":{"rendered":"

\u6458\u8981<\/h3>\n

\u8bb2\u900f Flink Sink API \u7684\u5b8c\u6574\u4f53\u7cfb：print \u8c03\u8bd5\u8f93\u51fa\u3001KafkaSink \/ FileSink \/ JdbcSink \u751f\u4ea7\u7ea7 Connector\u3001\u65b0 Sink API \u7684 SinkWriter \u4e0e SinkCommitter \u4e24\u9636\u6bb5\u63d0\u4ea4\u673a\u5236\u3001\u8f93\u51fa\u4e00\u81f4\u6027\u4e09\u79cd\u8bed\u4e49（at-least-once \/ \u5e42\u7b49 \/ exactly-once）\u7684\u9009\u578b，\u9644 5 \u4e2a\u53ef\u76f4\u63a5\u8fd0\u884c\u7684\u5b9e\u6218\u6848\u4f8b\u4e0e 6 \u4e2a\u771f\u5b9e\u8e29\u5751\u70b9\u3002<\/p>\n

\u5173\u952e\u8bcd<\/h3>\n

Flink\u3001Sink API\u3001KafkaSink\u3001FileSink\u3001JdbcSink\u3001\u4e24\u9636\u6bb5\u63d0\u4ea4\u3001exactly-once\u3001\u5e42\u7b49\u5199\u3001SinkWriter\u3001SinkCommitter<\/p>\n

\n

Source \u7bc7\u8bb2\u4e86\u6570\u636e\u600e\u4e48\u8fdb\u6765，Transformation \u7bc7\u8bb2\u4e86\u6570\u636e\u600e\u4e48\u52a0\u5de5，\u8fd9\u4e00\u7bc7\u6536\u5b98：\u6570\u636e\u600e\u4e48\u51fa\u53bb\u3002Sink \u662f\u4f5c\u4e1a\u7684\u6700\u540e\u4e00\u516c\u91cc，\u4e5f\u662f\u300cexactly-once\u300d\u8fd9\u4e2a\u627f\u8bfa\u6700\u7ec8\u843d\u5730\u7684\u5730\u65b9\u2014\u2014\u5f88\u591a\u4f5c\u4e1a\u72b6\u6001\u7b97\u5f97\u5b8c\u5168\u6b63\u786e，\u5374\u56e0\u4e3a Sink \u914d\u7f6e\u9519\u4e86，\u628a\u6570\u636e\u5199\u91cd\u3001\u5199\u4e22\u3001\u5199\u6162\u3002<\/p>\n

\u8fd9\u7bc7\u6309\u300c\u8c03\u8bd5 \u2192 \u751f\u4ea7 \u2192 \u539f\u7406 \u2192 \u8bed\u4e49\u300d\u7684\u987a\u5e8f\u8bb2\u900f Sink：5 \u4e2a\u80fd\u76f4\u63a5\u8dd1\u7684\u6848\u4f8b，\u5916\u52a0\u4e00\u4e2a\u5927\u591a\u6570\u6559\u7a0b\u4e0d\u8bb2\u7684\u5173\u952e\u70b9\u2014\u2014\u4e24\u9636\u6bb5\u63d0\u4ea4\u5230\u5e95\u5728\u63d0\u4ea4\u4ec0\u4e48\u3002<\/p>\n

\n

\u4e00\u3001Sink API \u5206\u7c7b\u5168\u666f<\/h3>\n

\u548c Source \u5bf9\u79f0，Sink \u4e5f\u6709\u4e09\u7c7b\u5165\u53e3：<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

  • \u73af\u5883\u65b9\u6cd5：print()\u3001printToErr()\u3001writeAsText()（\u65e7）\u2014\u2014\u8f93\u51fa\u5230\u6807\u51c6\u8f93\u51fa\u6216\u6587\u4ef6，\u53ea\u9002\u5408\u8c03\u8bd5\u3002<\/li>\n
  • Connector Sink：KafkaSink\u3001FileSink\u3001JdbcSink\u3001PulsarSink \u7b49\u5b98\u65b9\u5b9e\u73b0\u2014\u2014\u751f\u4ea7\u4e3b\u529b\u3002<\/li>\n
  • \u81ea\u5b9a\u4e49 Sink：\u65e7 API SinkFunction\/RichSinkFunction，\u65b0 API \u7684 Sink + SinkWriter + SinkCommitter\u2014\u2014\u515c\u5e95\u624b\u6bb5\u3002<\/li>\n

    \u9009\u578b\u8def\u5f84\u4e0e Source \u4e00\u81f4：\u5148\u627e\u5b98\u65b9 Connector，\u6ca1\u6709\u624d\u81ea\u5b9a\u4e49\u3002<\/p>\n

    \u540c\u6837\u8981\u6ce8\u610f API \u6f14\u8fdb：\u65e7\u7684 env.addSink(new SinkFunction…) \u548c FlinkKafkaProducer \u5df2\u5e9f\u5f03，\u65b0\u9879\u76ee\u7528 stream.sinkTo(Sink) \u7edf\u4e00\u5165\u53e3\u3002\u65b0 Sink API \u6700\u5927\u7684\u5347\u7ea7\u662f\u628a\u300c\u5199\u6570\u636e\u300d\u548c\u300c\u63d0\u4ea4\u300d\u62c6\u6210\u4e24\u4e2a\u89d2\u8272\u2014\u2014\u8fd9\u6b63\u662f exactly-once \u7684\u673a\u5236\u57fa\u7840，\u540e\u9762\u7ec6\u8bb2\u3002<\/p>\n

    \n

    \u4e8c\u3001\u5b9e\u6218\u4e00：print，\u8c03\u8bd5\u6807\u914d<\/h3>\n

    import<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>datastream.<\/span><\/span>DataStream<\/span><\/span>;<\/span>
    \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>environment.<\/span><\/span>StreamExecutionEnvironment<\/span><\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> PrintSinkDemo<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> Exception<\/span> {<\/span>
    \n StreamExecutionEnvironment<\/span> env =<\/span> StreamExecutionEnvironment<\/span>.<\/span>getExecutionEnvironment<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    DataStream<\/span><<\/span>String<\/span>><\/span><\/span> stream =<\/span> env.<\/span>fromElements<\/span>(<\/span>"a"<\/span>,<\/span> "b"<\/span>,<\/span> "c"<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u8c03\u8bd5\u8f93\u51fa：\u6bcf\u5e76\u884c\u5b9e\u4f8b\u4e00\u884c，\u683c\u5f0f [subtaskIndex] value<\/span>
    \n stream.<\/span>print<\/span>(<\/span>"debug-tag"<\/span>)<\/span>;<\/span>
    \n \/\/ \u9519\u8bef\u6d41\u8f93\u51fa（\u7ea2\u8272\u5b57\u4f53，\u65b9\u4fbf\u533a\u5206）<\/span>
    \n stream.<\/span>printToErr<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    env.<\/span>execute<\/span>(<\/span>"print-sink-demo"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    print \u7684\u6ce8\u610f\u4e8b\u9879：<\/p>\n

      \n
    • \u8f93\u51fa\u683c\u5f0f 1> value，\u524d\u9762\u7684\u6570\u5b57\u662f\u5b50\u4efb\u52a1\u7f16\u53f7，\u8c03\u8bd5\u5e76\u884c\u5ea6\u95ee\u9898\u5f88\u6709\u7528；<\/li>\n
    • \u5b83\u8f93\u51fa\u5230 TaskManager \u7684\u6807\u51c6\u8f93\u51fa，\u96c6\u7fa4\u6a21\u5f0f\u4e0b\u8981\u5728 TaskManager \u65e5\u5fd7\u91cc\u627e，\u4e0d\u662f\u63d0\u4ea4\u673a；<\/li>\n
    • \u751f\u4ea7\u73af\u5883\u7981\u6b62\u7528 print \u5f53\u6b63\u5f0f Sink\u2014\u2014\u6ca1\u6709\u5199\u5165\u4fdd\u969c，\u6570\u636e\u4f1a\u4e22\u3002<\/li>\n<\/ul>\n
      \n

      \u4e09\u3001\u5b9e\u6218\u4e8c：KafkaSink，\u751f\u4ea7\u6700\u5e38\u7528<\/h3>\n

      import<\/span> org.<\/span>apache.<\/span>flink.<\/span>api.<\/span>common.<\/span>serialization.<\/span><\/span>SimpleStringSchema<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>base.<\/span><\/span>DeliveryGuarantee<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>kafka.<\/span>sink.<\/span><\/span>KafkaRecordSerializationSchema<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>kafka.<\/span>sink.<\/span><\/span>KafkaSink<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>datastream.<\/span><\/span>DataStream<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>environment.<\/span><\/span>StreamExecutionEnvironment<\/span><\/span>;<\/span><\/p>\n

      public<\/span> class<\/span> KafkaSinkDemo<\/span> {<\/span>
      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> Exception<\/span> {<\/span>
      \n StreamExecutionEnvironment<\/span> env =<\/span> StreamExecutionEnvironment<\/span>.<\/span>getExecutionEnvironment<\/span>(<\/span>)<\/span>;<\/span>
      \n \/\/ \u6ce8\u610f：EXACTLY_ONCE \u8bed\u4e49\u4f9d\u8d56 Checkpoint，\u5fc5\u987b\u5f00\u542f<\/span>
      \n env.<\/span>enableCheckpointing<\/span>(<\/span>30_000<\/span>)<\/span>;<\/span><\/p>\n

      DataStream<\/span><<\/span>String<\/span>><\/span><\/span> stream =<\/span> env.<\/span>fromElements<\/span>(<\/span>"{\\\\"orderId\\\\":1,\\\\"amount\\\\":99.5}"<\/span>)<\/span>;<\/span><\/p>\n

      KafkaSink<\/span><<\/span>String<\/span>><\/span><\/span> sink =<\/span> KafkaSink<\/span>.<\/span><<\/span>String<\/span>><\/span><\/span>builder<\/span>(<\/span>)<\/span>
      \n .<\/span>setBootstrapServers<\/span>(<\/span>"localhost:9092"<\/span>)<\/span>
      \n .<\/span>setRecordSerializer<\/span>(<\/span>KafkaRecordSerializationSchema<\/span>.<\/span>builder<\/span>(<\/span>)<\/span>
      \n .<\/span>setTopic<\/span>(<\/span>"orders-out"<\/span>)<\/span>
      \n \/\/ \u6574\u4e2a String \u4f5c\u4e3a value \u5199\u51fa\u53bb<\/span>
      \n .<\/span>setValueSerializationSchema<\/span>(<\/span>new<\/span> SimpleStringSchema<\/span>(<\/span>)<\/span>)<\/span>
      \n .<\/span>build<\/span>(<\/span>)<\/span>)<\/span>
      \n \/\/ \u4e09\u79cd\u8bed\u4e49：EXACTLY_ONCE \/ AT_LEAST_ONCE \/ NONE<\/span>
      \n .<\/span>setDeliveryGuarantee<\/span>(<\/span>DeliveryGuarantee<\/span>.<\/span>EXACTLY_ONCE<\/span>)<\/span>
      \n \/\/ EXACTLY_ONCE \u4e0b\u9700\u8981\u4e8b\u52a1\u524d\u7f00（\u540c\u96c6\u7fa4\u552f\u4e00）<\/span>
      \n .<\/span>setTransactionalIdPrefix<\/span>(<\/span>"flink-order-sink"<\/span>)<\/span>
      \n .<\/span>build<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

      stream.<\/span>sinkTo<\/span>(<\/span>sink)<\/span>;<\/span><\/p>\n

      env.<\/span>execute<\/span>(<\/span>"kafka-sink-demo"<\/span>)<\/span>;<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      \u4e24\u4e2a\u6700\u5bb9\u6613\u8e29\u7684\u914d\u7f6e\u70b9：<\/p>\n

    • deliveryGuarantee \u9009 EXACTLY_ONCE \u65f6，Checkpoint \u5fc5\u987b\u5f00\u542f，\u5426\u5219\u4e8b\u52a1\u6c38\u8fdc\u65e0\u6cd5\u63d0\u4ea4，\u4f5c\u4e1a\u4f1a\u5361\u4f4f\u6216\u62a5\u9519；<\/li>\n
    • setTransactionalIdPrefix \u5fc5\u987b\u5168\u5c40\u552f\u4e00（\u4e0d\u540c\u4f5c\u4e1a\u4e0d\u540c\u524d\u7f00），\u5426\u5219\u4e24\u4e2a\u4f5c\u4e1a\u62a2\u540c\u4e00\u6279\u4e8b\u52a1 ID，Kafka \u76f4\u63a5\u629b ProducerFencedException\u3002<\/li>\n
      \n

      \u56db\u3001\u5b9e\u6218\u4e09：FileSink，\u843d\u76d8\u5230 HDFS\/\u672c\u5730<\/h3>\n

      import<\/span> org.<\/span>apache.<\/span>flink.<\/span>api.<\/span>common.<\/span>serialization.<\/span><\/span>SimpleStringEncoder<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>file.<\/span>sink.<\/span><\/span>FileSink<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>core.<\/span>fs.<\/span><\/span>Path<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>datastream.<\/span><\/span>DataStream<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>environment.<\/span><\/span>StreamExecutionEnvironment<\/span><\/span>;<\/span>
      \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>functions.<\/span>sink.<\/span>filesystem.<\/span>rollingpolicies.<\/span><\/span>DefaultRollingPolicy<\/span><\/span>;<\/span><\/p>\n

      import<\/span> java.<\/span>time.<\/span><\/span>Duration<\/span><\/span>;<\/span><\/p>\n

      public<\/span> class<\/span> FileSinkDemo<\/span> {<\/span>
      \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> Exception<\/span> {<\/span>
      \n StreamExecutionEnvironment<\/span> env =<\/span> StreamExecutionEnvironment<\/span>.<\/span>getExecutionEnvironment<\/span>(<\/span>)<\/span>;<\/span>
      \n env.<\/span>enableCheckpointing<\/span>(<\/span>30_000<\/span>)<\/span>;<\/span><\/p>\n

      DataStream<\/span><<\/span>String<\/span>><\/span><\/span> stream =<\/span> env.<\/span>fromElements<\/span>(<\/span>"line1"<\/span>,<\/span> "line2"<\/span>)<\/span>;<\/span><\/p>\n

      FileSink<\/span><<\/span>String<\/span>><\/span><\/span> sink =<\/span> FileSink<\/span>.<\/span>forRowFormat<\/span>(<\/span>
      \n new<\/span> Path<\/span>(<\/span>"hdfs:\/\/\/data\/flink-output"<\/span>)<\/span>,<\/span>
      \n new<\/span> SimpleStringEncoder<\/span><<\/span>String<\/span>><\/span><\/span>(<\/span>"UTF-8"<\/span>)<\/span>)<\/span>
      \n \/\/ \u6eda\u52a8\u7b56\u7565：128MB \u6216 60s \u6216 30s \u65e0\u65b0\u6570\u636e \u2192 \u5173\u95ed\u5f53\u524d\u6587\u4ef6<\/span>
      \n .<\/span>withRollingPolicy<\/span>(<\/span>DefaultRollingPolicy<\/span>.<\/span>builder<\/span>(<\/span>)<\/span>
      \n .<\/span>withMaxPartSize<\/span>(<\/span>128<\/span> *<\/span> 1024<\/span> *<\/span> 1024<\/span>)<\/span>
      \n .<\/span>withRolloverInterval<\/span>(<\/span>Duration<\/span>.<\/span>ofSeconds<\/span>(<\/span>60<\/span>)<\/span>)<\/span>
      \n .<\/span>withInactivityInterval<\/span>(<\/span>Duration<\/span>.<\/span>ofSeconds<\/span>(<\/span>30<\/span>)<\/span>)<\/span>
      \n .<\/span>build<\/span>(<\/span>)<\/span>)<\/span>
      \n .<\/span>build<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

      stream.<\/span>sinkTo<\/span>(<\/span>sink)<\/span>;<\/span><\/p>\n

      env.<\/span>execute<\/span>(<\/span>"file-sink-demo"<\/span>)<\/span>;<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      FileSink \u4e24\u4e2a\u5173\u952e\u673a\u5236：<\/p>\n

        \n
      • \u76ee\u5f55\u6309\u65f6\u95f4\u5206\u6876：\u9ed8\u8ba4\u6309\u5904\u7406\u65f6\u95f4\u5206\u6876（2026-08-24–12），\u6570\u636e\u843d\u5230\u5bf9\u5e94\u6876\u76ee\u5f55；<\/li>\n
      • \u4e24\u9636\u6bb5\u6587\u4ef6\u7ba1\u7406：\u5199\u5165\u4e2d\u7684\u6587\u4ef6\u662f .in-progress \u540e\u7f00，Checkpoint \u6210\u529f\u540e\u624d rename \u4e3a\u6b63\u5f0f\u6587\u4ef6\u2014\u2014\u6240\u4ee5\u5728\u4f5c\u4e1a\u8fd0\u884c\u4e2d\u770b\u5230\u7684 .in-progress \u6587\u4ef6\u4e0d\u4ee3\u8868\u6570\u636e\u5df2\u843d\u5e93，Checkpoint \u5b8c\u6210\u624d\u7b97\u6570\u3002\u8fd9\u662f FileSink \u8bed\u4e49\u6b63\u786e\u7684\u6838\u5fc3\u3002<\/li>\n<\/ul>\n
        \n

        \u4e94\u3001\u5b9e\u6218\u56db：JdbcSink，\u5199 MySQL<\/h3>\n

        import<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>jdbc.<\/span><\/span>JdbcConnectionOptions<\/span><\/span>;<\/span>
        \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>jdbc.<\/span><\/span>JdbcExecutionOptions<\/span><\/span>;<\/span>
        \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>connector.<\/span>jdbc.<\/span><\/span>JdbcSink<\/span><\/span>;<\/span>
        \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>datastream.<\/span><\/span>DataStream<\/span><\/span>;<\/span>
        \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>environment.<\/span><\/span>StreamExecutionEnvironment<\/span><\/span>;<\/span><\/p>\n

        public<\/span> class<\/span> JdbcSinkDemo<\/span> {<\/span>
        \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> Exception<\/span> {<\/span>
        \n StreamExecutionEnvironment<\/span> env =<\/span> StreamExecutionEnvironment<\/span>.<\/span>getExecutionEnvironment<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

        \/\/ \u8f93\u5165：orderId,amount,category<\/span>
        \n DataStream<\/span><<\/span>String<\/span>><\/span><\/span> stream =<\/span> env.<\/span>fromElements<\/span>(<\/span>"1001,99.5,book"<\/span>,<\/span> "1002,12.0,music"<\/span>)<\/span>;<\/span><\/p>\n

        \/\/ \u6279\u91cf + upsert：\u540c\u8ba2\u5355\u91cd\u590d\u5199\u65f6\u6309\u4e3b\u952e\u8986\u76d6 \u2192 \u5e42\u7b49，\u91cd\u590d\u5904\u7406\u65e0\u5bb3<\/span>
        \n stream.<\/span>sinkTo<\/span>(<\/span>JdbcSink<\/span>.<\/span>sink<\/span>(<\/span>
        \n \/\/ SQL：ON DUPLICATE KEY UPDATE \u662f\u5e42\u7b49\u5173\u952e<\/span>
        \n "INSERT INTO order_stats(order_id, amount, category) VALUES (?, ?, ?) "<\/span> +<\/span>
        \n "ON DUPLICATE KEY UPDATE amount = VALUES(amount)"<\/span>,<\/span>
        \n (<\/span>ps,<\/span> line)<\/span> -><\/span> {<\/span>
        \n String<\/span>[<\/span>]<\/span> p =<\/span> line.<\/span>split<\/span>(<\/span>","<\/span>)<\/span>;<\/span>
        \n ps.<\/span>setString<\/span>(<\/span>1<\/span>,<\/span> p[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
        \n ps.<\/span>setDouble<\/span>(<\/span>2<\/span>,<\/span> Double<\/span>.<\/span>parseDouble<\/span>(<\/span>p[<\/span>1<\/span>]<\/span>)<\/span>)<\/span>;<\/span>
        \n ps.<\/span>setString<\/span>(<\/span>3<\/span>,<\/span> p[<\/span>2<\/span>]<\/span>)<\/span>;<\/span>
        \n }<\/span>,<\/span>
        \n \/\/ \u6267\u884c\u53c2\u6570：\u6279\u91cf 1000 \u6761\u63d0\u4ea4\u4e00\u6b21，\u91cd\u8bd5 3 \u6b21<\/span>
        \n JdbcExecutionOptions<\/span>.<\/span>builder<\/span>(<\/span>)<\/span>
        \n .<\/span>withBatchSize<\/span>(<\/span>1000<\/span>)<\/span>
        \n .<\/span>withMaxRetries<\/span>(<\/span>3<\/span>)<\/span>
        \n .<\/span>build<\/span>(<\/span>)<\/span>,<\/span>
        \n new<\/span> JdbcConnectionOptions.<\/span>JdbcConnectionOptionsBuilder<\/span>(<\/span>)<\/span>
        \n .<\/span>withUrl<\/span>(<\/span>"jdbc:mysql:\/\/localhost:3306\/ods?useSSL=false"<\/span>)<\/span>
        \n .<\/span>withDriverName<\/span>(<\/span>"com.mysql.cj.jdbc.Driver"<\/span>)<\/span>
        \n .<\/span>withUsername<\/span>(<\/span>"root"<\/span>)<\/span>
        \n .<\/span>withPassword<\/span>(<\/span>"password"<\/span>)<\/span>
        \n .<\/span>build<\/span>(<\/span>)<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

        env.<\/span>execute<\/span>(<\/span>"jdbc-sink-demo"<\/span>)<\/span>;<\/span>
        \n }<\/span>
        \n}<\/span><\/p>\n

        JdbcSink \u7684\u8bed\u4e49\u771f\u76f8\u8981\u8ba4\u6e05：MySQL \u4e0d\u652f\u6301\u8de8\u5b9e\u4f8b\u4e8b\u52a1，JdbcSink \u505a\u4e0d\u5230\u771f\u6b63\u7684\u4e24\u9636\u6bb5\u63d0\u4ea4，\u5b83\u9760\u7684\u662f\u300c\u6279\u91cf\u5199\u5165 + ON DUPLICATE KEY UPDATE \u5e42\u7b49\u300d\u6765\u903c\u8fd1 exactly-once\u2014\u2014\u91cd\u590d\u5199\u540c\u4e00\u884c，\u7ed3\u679c\u4e0d\u53d8\u3002\u8fd9\u5c31\u662f\u300c\u5e42\u7b49\u5199\u300d\u8def\u7ebf，\u662f\u6570\u636e\u5e93 Sink \u7684\u4e3b\u6d41\u505a\u6cd5\u3002<\/p>\n

        \u6027\u80fd\u5173\u952e：withBatchSize \u5fc5\u987b\u914d\u3002\u9ed8\u8ba4\u662f\u9010\u6761\u63d0\u4ea4，\u6bcf\u6761\u4e00\u4e2a\u4e8b\u52a1，TPS \u4f4e\u5230\u6ca1\u6cd5\u7528；\u914d 1000 \u6279\u91cf\u540e\u541e\u5410\u63d0\u5347\u4e00\u4e2a\u6570\u91cf\u7ea7\u3002<\/p>\n

        \n

        \u516d\u3001\u65b0 Sink API \u67b6\u6784：\u4e24\u9636\u6bb5\u63d0\u4ea4\u5230\u5e95\u5728\u63d0\u4ea4\u4ec0\u4e48<\/h3>\n

        \u7406\u89e3\u65b0 Sink API，\u5173\u952e\u662f\u4e24\u4e2a\u89d2\u8272：<\/p>\n

        \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

          \n
        • SinkWriter（\u8fd0\u884c\u5728 TaskManager，\u6bcf\u5e76\u884c\u5b9e\u4f8b\u4e00\u4e2a）：\u63a5\u6536\u8bb0\u5f55，\u5e8f\u5217\u5316\u540e\u5199\u5165\u5916\u90e8\u7cfb\u7edf\u7684\u6682\u5b58\u533a\u2014\u2014Kafka \u7684\u672a\u63d0\u4ea4\u4e8b\u52a1\u3001FileSink \u7684 .in-progress \u6587\u4ef6\u3001JDBC \u7684\u6279\u91cf\u7f13\u51b2\u3002<\/li>\n
        • SinkCommitter（Checkpoint \u6210\u529f\u540e\u89e6\u53d1）：\u62ff\u5230 Writer \u4ea7\u51fa\u7684 Committable（\u5f85\u63d0\u4ea4\u53e5\u67c4），\u6267\u884c\u771f\u6b63\u7684\u63d0\u4ea4\u2014\u2014Kafka \u4e8b\u52a1 commit\u3001\u6587\u4ef6 rename\u3002<\/li>\n<\/ul>\n

          \u4e24\u9636\u6bb5\u63d0\u4ea4\u7684\u5b8c\u6574\u65f6\u5e8f：<\/p>\n

        • Checkpoint barrier \u5230\u8fbe \u2192 SinkWriter \u505c\u6b62\u5199\u5165，\u751f\u6210 Committable \u5e76\u968f checkpoint \u6301\u4e45\u5316（\u9884\u63d0\u4ea4）；<\/li>\n
        • Checkpoint \u5168\u5c40\u5b8c\u6210 \u2192 JobManager \u901a\u77e5 SinkCommitter；<\/li>\n
        • SinkCommitter \u7528 Committable \u63d0\u4ea4\u4e8b\u52a1\/rename \u6587\u4ef6（\u786e\u8ba4\u63d0\u4ea4）；<\/li>\n
        • \u6545\u969c\u6062\u590d\u65f6，\u672a\u63d0\u4ea4\u7684\u4e8b\u52a1\u56de\u6eda，\u5df2\u63d0\u4ea4\u7684\u4e0d\u91cd\u590d\u63d0\u4ea4\u2014\u2014\u4e0d\u591a\u4e0d\u5c11，\u8fd9\u5c31\u662f exactly-once\u3002<\/li>\n

          \u6ce8\u610f\u4e00\u4e2a\u8fb9\u754c：exactly-once \u662f\u300cFlink \u4e24\u9636\u6bb5\u63d0\u4ea4 + \u5916\u90e8\u7cfb\u7edf\u652f\u6301\u4e8b\u52a1\u300d\u7684\u7ec4\u5408\u62f3\u3002Kafka \u652f\u6301\u4e8b\u52a1\u53ef\u4ee5；\u6587\u4ef6\u7cfb\u7edf\u652f\u6301\u539f\u5b50 rename \u53ef\u4ee5；MySQL \u8fd9\u7c7b\u4e0d\u652f\u6301\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684，\u53ea\u80fd\u9000\u800c\u6c42\u5176\u6b21\u8d70\u5e42\u7b49\u3002<\/p>\n

          \n

          \u4e03\u3001\u8f93\u51fa\u4e00\u81f4\u6027：\u4e09\u79cd\u8bed\u4e49\u600e\u4e48\u9009<\/h3>\n

          \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n\n\u8bed\u4e49\u542b\u4e49\u5b9e\u73b0\u9002\u7528<\/tr>\n\n\n\n\n
          at-least-once<\/td>\n\u53ef\u80fd\u91cd\u590d<\/td>\n\u5199\u5b8c\u5373\u7b97<\/td>\n\u65e5\u5fd7\u3001\u76d1\u63a7（\u5bb9\u5fcd\u91cd\u590d）<\/td>\n<\/tr>\n
          \u5e42\u7b49\u5199<\/td>\n\u91cd\u590d\u65e0\u5bb3<\/td>\nupsert \/ \u8986\u76d6\u5199<\/td>\n\u6570\u4ed3\u3001MySQL \u5bbd\u8868<\/td>\n<\/tr>\n
          exactly-once<\/td>\n\u4e0d\u91cd\u4e0d\u6f0f<\/td>\n\u4e24\u9636\u6bb5\u63d0\u4ea4\u4e8b\u52a1<\/td>\n\u91d1\u878d\u3001\u5f3a\u4e00\u81f4\u94fe\u8def<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u5de5\u7a0b\u4ee3\u4ef7\u4ece\u4f4e\u5230\u9ad8，\u9009\u578b\u5efa\u8bae：<\/p>\n

        • \u4e0b\u6e38\u662f Kafka \u2192 EXACTLY_ONCE（\u5f00\u542f checkpoint，\u541e\u5410\u635f\u5931\u53ef\u63a7）；<\/li>\n
        • \u4e0b\u6e38\u662f MySQL\/HBase \u2192 \u5e42\u7b49\u5199（\u8bbe\u8ba1\u4e1a\u52a1\u5e42\u7b49\u952e + upsert），\u6027\u4ef7\u6bd4\u6700\u9ad8；<\/li>\n
        • \u4e0b\u6e38\u53ea\u662f\u65e5\u5fd7\/\u544a\u8b66 \u2192 at-least-once \u5c31\u591f，\u522b\u4e3a\u7528\u4e0d\u4e0a\u7684\u4e00\u81f4\u6027\u727a\u7272\u541e\u5410\u3002<\/li>\n

          \u5224\u65ad\u81ea\u5df1\u7684\u573a\u666f：\u5148\u95ee\u300c\u91cd\u590d\u5199\u4e00\u6761\u6570\u636e，\u4e0b\u6e38\u4f1a\u4e0d\u4f1a\u51fa\u4e8b？\u300d\u4e0d\u4f1a \u2192 \u5e42\u7b49\/at-least-once \u90fd\u884c；\u4f1a \u2192 \u5fc5\u987b exactly-once \u6216\u5f3a\u5e42\u7b49\u3002<\/p>\n

          \n

          \u516b\u3001\u5b9e\u6218\u4e94：\u81ea\u5b9a\u4e49 Sink（\u515c\u5e95）<\/h3>\n

          \u5b98\u65b9\u6ca1\u6709\u73b0\u6210 Connector \u65f6\u624d\u81ea\u5b9a\u4e49\u3002\u65e7 API \u7684 RichSinkFunction \u5199\u6cd5\u6700\u7b80\u5355，\u9002\u5408\u5185\u90e8\u7cfb\u7edf\u5bf9\u63a5：<\/p>\n

          import<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>environment.<\/span><\/span>StreamExecutionEnvironment<\/span><\/span>;<\/span>
          \nimport<\/span> org.<\/span>apache.<\/span>flink.<\/span>streaming.<\/span>api.<\/span>functions.<\/span>sink.<\/span><\/span>RichSinkFunction<\/span><\/span>;<\/span><\/p>\n

          public<\/span> class<\/span> CustomSinkDemo<\/span> {<\/span>
          \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> throws<\/span> Exception<\/span> {<\/span>
          \n StreamExecutionEnvironment<\/span> env =<\/span> StreamExecutionEnvironment<\/span>.<\/span>getExecutionEnvironment<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

          env.<\/span>fromElements<\/span>(<\/span>"event-1"<\/span>,<\/span> "event-2"<\/span>)<\/span>
          \n .<\/span>addSink<\/span>(<\/span>new<\/span> RichSinkFunction<\/span><<\/span>String<\/span>><\/span><\/span>(<\/span>)<\/span> {<\/span>
          \n @Override<\/span>
          \n public<\/span> void<\/span> open<\/span>(<\/span>org.<\/span>apache.<\/span>flink.<\/span>configuration.<\/span><\/span>Configuration<\/span> parameters)<\/span> {<\/span>
          \n \/\/ \u751f\u547d\u5468\u671f\u65b9\u6cd5：\u521d\u59cb\u5316\u8fde\u63a5（\u6bcf\u5e76\u884c\u5b9e\u4f8b\u8c03\u7528\u4e00\u6b21）<\/span>
          \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"open connection"<\/span>)<\/span>;<\/span>
          \n }<\/span><\/p>\n

          @Override<\/span>
          \n public<\/span> void<\/span> invoke<\/span>(<\/span>String<\/span> value,<\/span> Context<\/span> context)<\/span> {<\/span>
          \n \/\/ \u6bcf\u6765\u4e00\u6761\u6570\u636e\u8c03\u7528\u4e00\u6b21：\u5199\u5916\u90e8\u7cfb\u7edf<\/span>
          \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"write: "<\/span> +<\/span> value)<\/span>;<\/span>
          \n }<\/span><\/p>\n

          @Override<\/span>
          \n public<\/span> void<\/span> close<\/span>(<\/span>)<\/span> {<\/span>
          \n \/\/ \u4f5c\u4e1a\u7ed3\u675f\u65f6\u91ca\u653e\u8fde\u63a5<\/span>
          \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"close connection"<\/span>)<\/span>;<\/span>
          \n }<\/span>
          \n }<\/span>)<\/span>;<\/span><\/p>\n

          env.<\/span>execute<\/span>(<\/span>"custom-sink-demo"<\/span>)<\/span>;<\/span>
          \n }<\/span>
          \n}<\/span><\/p>\n

          \u5fc5\u987b\u77e5\u9053\u7684\u5751：RichSinkFunction \u6ca1\u6709\u4e24\u9636\u6bb5\u63d0\u4ea4\u80fd\u529b\u2014\u2014\u6545\u969c\u91cd\u653e\u65f6 invoke \u4f1a\u88ab\u91cd\u590d\u8c03\u7528，\u6570\u636e\u91cd\u590d\u5199\u3002\u8981\u4e48\u81ea\u5df1\u5b9e\u73b0\u5e42\u7b49（\u4e0b\u6e38\u6309\u4e1a\u52a1\u952e\u53bb\u91cd），\u8981\u4e48\u5347\u7ea7\u5230\u65b0 Sink API \u7684 Sink + SinkWriter + SinkCommitter（\u4ee3\u7801\u91cf\u5927\u5e45\u4e0a\u5347，\u4f46\u8bed\u4e49\u5b8c\u6574）\u3002\u751f\u4ea7\u5bf9\u63a5\u81ea\u7814\u7cfb\u7edf\u65f6，\u591a\u6570\u56e2\u961f\u9009\u62e9\u300c\u65e7 API \u5feb\u901f\u5b9e\u73b0 + \u4e0b\u6e38\u5e42\u7b49\u515c\u5e95\u300d\u3002<\/p>\n

          \n

          \u4e5d\u3001\u516d\u4e2a\u771f\u5b9e\u8e29\u5751<\/h3>\n
        • print \u5f53\u751f\u4ea7 Sink \u7528\u3002print \u8f93\u51fa\u5230 TaskManager stdout，\u65e5\u5fd7\u4e00\u6eda\u5c31\u6ca1\u4e86；\u751f\u4ea7\u5fc5\u987b\u63a5\u6b63\u5f0f Sink\u3002\u672c\u5730\u8c03\u8bd5\u5b8c\u8bb0\u5f97\u5220\u6389\u3002<\/li>\n
        • KafkaSink \u7684 EXACTLY_ONCE \u6ca1\u5f00 checkpoint\u3002\u4e8b\u52a1\u6ca1\u6709\u89e6\u53d1\u70b9，\u6570\u636e\u6c38\u8fdc\u505c\u5728\u672a\u63d0\u4ea4\u72b6\u6001；\u800c\u4e14 transactionalIdPrefix \u4e0d\u552f\u4e00\u4f1a\u4e92\u76f8\u6253\u67b6，\u62a5 ProducerFencedException\u3002<\/li>\n
        • FileSink \u7684 .in-progress \u6587\u4ef6\u8bef\u4ee5\u4e3a\u5df2\u843d\u5e93\u3002\u6587\u4ef6\u8981\u7b49 checkpoint \u6210\u529f\u540e\u624d rename；\u4e0b\u6e38\u6d88\u8d39\u8fd9\u4e9b\u6587\u4ef6\u65f6，\u8981\u4e48\u8bfb\u6b63\u5f0f\u6587\u4ef6，\u8981\u4e48\u914d\u5408 checkpoint \u65f6\u673a\u3002\u53cd\u8fc7\u6765，\u4e0d\u914d checkpoint \u65f6 FileSink \u6587\u4ef6\u6c38\u8fdc\u4e0d\u4f1a\u53d8\u6b63\u5f0f\u3002<\/li>\n
        • JdbcSink \u4e0d\u914d batchSize\u3002\u9ed8\u8ba4\u9010\u6761\u63d0\u4ea4，\u6bcf\u6761\u4e00\u4e2a\u4e8b\u52a1，\u51e0\u5343 TPS \u5c31\u662f\u4e0a\u9650\u3002\u914d withBatchSize(1000) \u540e\u91cf\u7ea7\u63d0\u5347\u3002<\/li>\n
        • \u81ea\u5b9a\u4e49 Sink \u65e0\u5e42\u7b49\u8fd8\u5f00 exactly-once\u3002RichSinkFunction \u6ca1\u6709\u63d0\u4ea4\u8bed\u4e49，\u4e0a\u6e38 checkpoint \u6062\u590d\u540e invoke \u5fc5\u7136\u91cd\u653e；\u4e0b\u6e38\u6ca1\u6709\u53bb\u91cd\u952e，\u6570\u636e\u5c31\u91cd\u590d\u4e86\u3002\u8981\u4e48\u4e0b\u6e38\u5e42\u7b49，\u8981\u4e48\u522b\u5bf9\u5916\u5ba3\u79f0\u7cbe\u786e\u4e00\u6b21\u3002<\/li>\n
        • Sink \u5e76\u884c\u5ea6\u4e0d\u5339\u914d\u4e0b\u6e38\u5bb9\u91cf\u3002KafkaSink \u5e76\u884c\u5ea6 > \u76ee\u6807 topic \u5206\u533a\u6570，\u591a\u51fa\u6765\u7684\u5b9e\u4f8b\u7a7a\u95f2；JDBC Sink \u5e76\u884c\u5ea6\u9ad8\u4f46\u8fde\u63a5\u6570\u4e5f\u7ffb\u500d，\u53ef\u80fd\u6253\u7206\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u2014\u2014Sink \u5e76\u884c\u5ea6\u8981\u4e0e\u4e0b\u6e38\u5bb9\u91cf\u5bf9\u9f50\u3002<\/li>\n
          \n

          Sink \u662f\u4f5c\u4e1a\u7684\u6700\u540e\u4e00\u516c\u91cc，\u4e5f\u662f\u8bed\u4e49\u627f\u8bfa\u7684\u5151\u73b0\u5904\u3002\u628a\u300cprint \u53ea\u8c03\u8bd5\u300d\u300c\u5b98\u65b9 Connector \u4f18\u5148\u300d\u300cexactly-once = \u4e24\u9636\u6bb5\u63d0\u4ea4 + \u5916\u90e8\u7cfb\u7edf\u652f\u6301\u300d\u300c\u6570\u636e\u5e93\u7528\u5e42\u7b49\u5199\u903c\u8fd1\u7cbe\u786e\u4e00\u6b21\u300d\u8fd9\u56db\u53e5\u8bdd\u8bb0\u4f4f，\u914d\u5408\u300c\u5148\u95ee\u91cd\u590d\u5199\u4f1a\u4e0d\u4f1a\u51fa\u4e8b\u300d\u7684\u9009\u578b\u65b9\u6cd5，Sink \u73af\u8282\u5c31\u4e0d\u4f1a\u518d\u6389\u94fe\u5b50\u3002\u81f3\u6b64，Source \u2192 Transform \u2192 Sink \u4e09\u4ef6\u5957\u5168\u90e8\u8bb2\u5b8c，\u4e00\u4e2a\u5b8c\u6574\u7684 Flink DataStream \u4f5c\u4e1a\u4ece\u5165\u53e3\u5230\u51fa\u53e3\u7684\u6bcf\u4e00\u73af\u90fd\u6709\u4e86\u6e05\u6670\u8ba4\u77e5\u3002
          \n\u95f2；JDBC Sink \u5e76\u884c\u5ea6\u9ad8\u4f46\u8fde\u63a5\u6570\u4e5f\u7ffb\u500d，\u53ef\u80fd\u6253\u7206\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u2014\u2014Sink \u5e76\u884c\u5ea6\u8981\u4e0e\u4e0b\u6e38\u5bb9\u91cf\u5bf9\u9f50\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

          \u6458\u8981
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