其中用到了滑动窗口函数大小30秒，间隔15秒，且大于窗口10秒的数据，被丢弃。（实际业务这三个值 应为是 10 分钟，1分钟，5分钟）。代码先记录一下

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public static void main(String[] arg) throws Exception {

        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.getConfig().enableSysoutLogging();//开启Sysout打日志
        env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime); //设置窗口的时间单位为process time

        Properties props = new Properties();
        props.put("bootstrap.servers", "kafkaip:9092");
        props.put("group.id", "metric-group4");
        props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");  //key 反序列化
        props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        props.put("auto.offset.reset", "earliest"); //value 反序列化

        DataStreamSource dataStreamSource = env.addSource(new FlinkKafkaConsumer011<>(
                "im-message-topic3",  //kafka topic
                new SimpleStringSchema(),  // String 序列化
                props)).setParallelism(1);

        DataStream bean3DataStream = dataStreamSource.map(new MapFunction() {         
            @Override
            public Message map(String value) throws Exception {
                 logger.info("receive msg:"+value); 
                 JSONObject jsonObject =JSONObject.parseObject(value);
                 Message s= new Message(
                         jsonObject.getString("sessionId"),
                         jsonObject.getString("fromUid"), 
                         jsonObject.getString("toUid"),
                         jsonObject.getString("chatType"),

                         jsonObject.getString("type"),
                         jsonObject.getString("msgId"),
                         jsonObject.getString("msg"),
                         jsonObject.getLong("timestampSend")

                         );
                 return s;
            }
        });

        //设置水印，并过滤数据
        DataStream bean3DataStreamWithAssignTime = 
                bean3DataStream.assignTimestampsAndWatermarks(new TruckTimestamp()).timeWindowAll(Time.seconds(30),Time.seconds(15)).apply(new AllWindowFunction() {  
                    @Override
                    public void apply(TimeWindow window, Iterable values, Collector out)
                            throws Exception {
                        for (Message t: values) {
                            logger.info("window start time:"+new Date(window.getStart()).toString());
                            logger.info("real time:"+new Date(t.getTimestampSend()).toString());
                            if(t.getTimestampSend() appendStream =tableEnv.toAppendStream(tb3, Row.class);
//        appendStream.addSink(new Sink());

    //对过滤后的数据，使用正则匹配数据
        Table tb2 = tableEnv.sqlQuery(
                "SELECT " +
                        " * " +
                        "FROM myTable" +
                        " " +
                        "MATCH_RECOGNIZE ( " +
                        "PARTITION BY sessionId " +
                        "ORDER BY rowtime " +
                        "MEASURES " +
                        "e2.timestampSend as answerTime, "+
                        "LAST(e1.timestampSend) as customer_event_time, " +
                        "e2.fromUid as empUid, " +
                        "e1.timestampSend as askTime," +                      
                        "1 as total_talk " +          
                        "ONE ROW PER MATCH " +
                        "AFTER MATCH SKIP TO LAST e2 " +
                        "PATTERN (e1+ e2+?) " +
                        "DEFINE " +
                        "e1 as e1.type = 'yonghu', " +
                        "e2 as e2.type = 'guanjia' " +
                        ")"+
                        ""
                );

           DataStream appendStream2 =tableEnv.toAppendStream(tb2, Row.class);
           appendStream2.addSink(new Sink2());

           env.execute("msg v5");   

    }

    public static class TruckTimestamp extends AscendingTimestampExtractor {
        private static final long serialVersionUID = 1L;

        @Override
        public long extractAscendingTimestamp(Message element) {
            return element.getTimestampSend();
        }
    }

     public static class Sink implements SinkFunction {
            /**
         * 
         */
        private static final long serialVersionUID = 1L;

            @Override
            public void invoke(Row value) throws Exception {
                System.out.println(new Date().toString()+"orinal time:"+value.toString());
            }
        }

     public static class Sink2 implements SinkFunction {
            /**
         * 
         */
        private static final long serialVersionUID = 1L;

            @Override
            public void invoke(Row value) throws Exception {
                System.out.println(new Date().toString()+"new time:"+value.toString());
            }
        }

本文标题：利用flink统计消息回复情况
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