flinksql-clentMATCH_RECOGNIZEkafka例子
环境 flink1.7.2
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增加flink1.7.2 的lib 中的jar， 否则会报类找不到
avro-1.8.2.jar flink-connector-kafka-0.10_2.12-1.7.2.jar flink-connector-kafka-base_2.12-1.7.2.jar flink-json-1.7.2.jar kafka-clients-0.11.0.0.jar flink-avro-1.7.2.jar flink-connector-kafka-0.11_2.12-1.7.2.jar flink-core-1.7.2.jar flink-python_2.12-1.7.2.jar log4j-1.2.17.jar flink-cep_2.12-1.7.2.jar flink-connector-kafka-0.9_2.12-1.7.2.jar flink-dist_2.12-1.7.2.jar flink-table_2.12-1.7.2.jar slf4j-log4j12-1.7.15.jar- 修改 sql-client-defaults.yaml 中的table 值
tables:
- name: myTable
type: source
update-mode: append
connector:
property-version: 1
type: kafka
version: 0.11
topic: im-message-topic2
startup-mode: earliest-offset
properties:
- key: bootstrap.servers
value: kafkaip:9092
- key: group.id
value: testGroup
format:
property-version: 1
type: json
schema: "ROW(sessionId STRING, fromUid STRING, toUid STRING, chatType STRING, type STRING,msgId STRING, msg STRING, timestampSend STRING)"
schema:
- name: sessionId
type: STRING
- name: fromUid
type: STRING
- name: toUid
type: STRING
- name: chatType
type: STRING
- name: type
type: STRING
- name: msgId
type: STRING
- name: msg
type: STRING
- name: rowTime
type: TIMESTAMP
rowtime:
timestamps:
type: "from-field"
from: "timestampSend"
watermarks:
type: "periodic-bounded"
delay: "60"
- name: procTime
type: TIMESTAMP
proctime: true- 运行
./bin/sql-client.sh embedded
select * from myTable;
然后使用 MATCH_RECOGNIZE 的sql
SELECT * FROM myTable MATCH_RECOGNIZE
( PARTITION BY sessionId ORDER BY rowTime MEASURES
e2.procTime as answerTime, LAST(e1.procTime) as customer_event_time,
e2.fromUid as empUid,
e1.procTime 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' );上面是使用sql-client 不用谢代码，当然也可以写代码，下面是对应的程序
public static void main(String[] arg) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
tableEnv.connect(new Kafka()
.version("0.11")
.topic("im-message-topic3")
//.property("zookeeper.connect","")
.property("bootstrap.servers","kafkaip:9092")
.startFromEarliest()
.sinkPartitionerRoundRobin()//Flink分区随机映射到kafka分区
).withFormat(new Json()
.failOnMissingField(false)
.deriveSchema()
).withSchema(new Schema()
.field("sessionId", Types.STRING).from("sessionId")
.field("fromUid", Types.STRING).from("fromUid")
.field("toUid", Types.STRING).from("toUid")
.field("chatType", Types.STRING).from("chatType")
.field("type", Types.STRING).from("type")
.field("msgId", Types.STRING).from("msgId")
.field("msg", Types.STRING).from("msg")
// .field("timestampSend", Types.SQL_TIMESTAMP)
.field("rowtime", Types.SQL_TIMESTAMP)
.rowtime(new Rowtime()
.timestampsFromField("timestampSend")
.watermarksPeriodicBounded(1000)
)
.field("proctime", Types.SQL_TIMESTAMP).proctime()
).inAppendMode().registerTableSource("myTable");
Table tb2 = tableEnv.sqlQuery(
"SELECT " +
"answerTime, customer_event_time, empUid, noreply_counts, total_talk " +
"FROM myTable" +
" " +
"MATCH_RECOGNIZE ( " +
"PARTITION BY sessionId " +
"ORDER BY rowtime " +
"MEASURES " +
"e2.rowtime as answerTime, "+
"LAST(e1.rowtime) as customer_event_time, " +
"e2.fromUid as empUid, " +
"1 as noreply_counts, " +
"e1.rowtime 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 appendStream =tableEnv.toAppendStream(tb2, Row.class);
System.out.println("schema is:");
tb2.printSchema();
appendStream.writeAsText("/usr/local/whk", WriteMode.OVERWRITE);
logger.info("stream end");
Table tb3 = tableEnv.sqlQuery("select sessionId, type from myTable");
DataStream temp =tableEnv.toAppendStream(tb3, Row.class);
tb3.printSchema();
temp.writeAsText("/usr/local/whk2", WriteMode.OVERWRITE);
env.execute("msg test");
}
大功告成，其实里面坑很多。
注意：如果使用了 TimeCharacteristic.EventTime， 请不用再使用procTime。
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