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Add expire to spark-redis #55

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Add expire to spark-redis #55

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6bc67bd
Add expire to spark-redis
hanibash Jun 8, 2017
f02a269
Merge branch 'master' into add-expire
gkorland Jun 24, 2020
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24 changes: 24 additions & 0 deletions src/main/scala/com/redislabs/provider/redis/redisFunctions.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -217,6 +217,14 @@ class RedisContext(@transient val sc: SparkContext) extends Serializable {
}
}

/**
* @param kttls Pair RDD of K/TTL
*/
def toRedisEXPIRE(kttls: RDD[(String, Int)])
(implicit redisConfig: RedisConfig = new RedisConfig(new RedisEndpoint(sc.getConf))) {
kttls.foreachPartition(partition => setExpire(partition, redisConfig))
}

/**
* @param kvs Pair RDD of K/V
* @param ttl time to live
Expand Down Expand Up @@ -283,6 +291,22 @@ class RedisContext(@transient val sc: SparkContext) extends Serializable {


object RedisContext extends Serializable {
/**
* @param arr k/ttl which should be set to expire in the target host
*/
def setExpire(arr: Iterator[(String, Int)], redisConfig: RedisConfig) {
arr.map(kv => (redisConfig.getHost(kv._1), kv)).toArray.groupBy(_._1).
mapValues(a => a.map(p => p._2)).foreach {
x => {
val conn = x._1.endpoint.connect()
val pipeline = conn.pipelined
x._2.foreach(x => pipeline.expire(x._1, x._2))
pipeline.sync
conn.close
}
}
}

/**
* @param arr k/vs which should be saved in the target host
* save all the k/vs to the target host
Expand Down