标签:flink redis streaming sink org apache import
不多bb!
先看RedisCommand设置数据结构类型时和redis结构对应关系。
Data Type | Redis Command [Sink] |
---|---|
HASH | HSET |
LIST | RPUSH, LPUSH |
SET | SADD |
PUBSUB | PUBLISH |
STRING | SET |
HYPER_LOG_LOG | PFADD |
SORTED_SET | ZADD |
SORTED_SET | ZREM |
具体的操作类:
package sink;
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.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.redis.RedisSink;
import org.apache.flink.streaming.connectors.redis.common.config.FlinkJedisPoolConfig;
import org.apache.flink.streaming.connectors.redis.common.mapper.RedisCommand;
import org.apache.flink.streaming.connectors.redis.common.mapper.RedisCommandDescription;
import org.apache.flink.streaming.connectors.redis.common.mapper.RedisMapper;
public class StreamingDemoToRedis {
public static void main(String[] args) throws Exception{
String hostname="hadoop01";
String delimiter="\n";
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
DataStreamSource<String> text = env.socketTextStream(hostname, 9000, delimiter);
DataStream<Tuple2<String, String>> list_wordData = text.map(new MapFunction<String, Tuple2<String, String>>() {
public Tuple2<String, String> map(String value) throws Exception {
return new Tuple2<>("list_word", value);
}
});
//创建redis的配置
FlinkJedisPoolConfig conf = new FlinkJedisPoolConfig.Builder().setHost(hostname).setPort(6379).build();
//
RedisSink<Tuple2<String, String>> redisSink = new RedisSink<Tuple2<String, String>>(conf, new MyRedisMapper());
list_wordData.addSink(redisSink);
env.execute("sink redis");
}
public static class MyRedisMapper implements RedisMapper<Tuple2<String, String>>{
//操作redis时选择的数据类型
public RedisCommandDescription getCommandDescription() {
return new RedisCommandDescription(RedisCommand.LPUSH);
}
//表示接受的数据中获取需要操作的redis的key值
public String getKeyFromData(Tuple2<String, String> data) {
return data.f0;
}
//表示接受的数据中获取需要操作的redis的value值
public String getValueFromData(Tuple2<String, String> data) {
return data.f1;
}
}
/**
* 结果为:
* 192.168.189.128:6379> flushall
* OK
* 192.168.189.128:6379> lrange list_word 0 -1
* 1) "ss"
* 2) "rr"
* 3) "ww"
* 192.168.189.128:6379>
*/
}
标签:flink,redis,streaming,sink,org,apache,import 来源: https://blog.csdn.net/weixin_39150719/article/details/101030101
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。