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Scala 操作Redis使用连接池工具类RedisUtil

2019年07月19日  | 移动技术网IT编程  | 我要评论

本文介绍了scala 操作redis，分享给大家，具体如下：

package com.zjw.util

import java.util

import org.apache.commons.pool2.impl.genericobjectpoolconfig
import org.apache.logging.log4j.scala.logging
import redis.clients.jedis.{jedis, jedispool, response}
import redis.clients.util.pool

object redisutil extends logging {
 private[this] var jedispool: pool[jedis] = _

 def main(args: array[string]): unit = {
  val password = "h-{<fc!yjl87_zkc8s"
  val host = "192.168.100.101"
  val port = 6379
  val timeout = 1000
  redisutil.init(host, port, timeout, password, 0)
  //redisutil.set("time".getbytes(), "2018-09-03 09:00:00".getbytes())
  //val result = redisutil.get("time".getbytes())
  //println(new string(result))
  //val map = map("name"-> "zhangsan","age"-> "21", "gender"-> "male", "id"-> "519099386")
  //redisutil.setcols("hash",map)

  // val result = redisutil.getcols("hash", array("name", "age", "xx")).map(x => (x._1, new string(x._2)))
  // logger.info(result)
  val result = redisutil.bulkgetcols(array("hash", "ss"))
  logger.info(s"result: ${result}")
 }

 def init(host: string, port: int, timeout: int, password: string, database: int = 0): unit = {
  jedispool = new jedispool(new genericobjectpoolconfig, host, port, timeout, password, database)
 }

 def get(key: array[byte]): array[byte] = {
  val jedis = jedispool.getresource
  val result: array[byte] = jedis.get(key)
  jedis.close()
  result
 }

 def set(key: array[byte], value: array[byte]): boolean = {
  try {
   val jedis = jedispool.getresource
   jedis.set(key, value)
   jedis.close()
   true
  } catch {
   case e: exception => {
    logger.error(s"写入数据到redis出错: ${e}")
    false
   }
  }
 }


 def getcols(key: string,
       cols: array[string] = array.empty
       ): map[string, array[byte]] = {
  import scala.collection.javaconverters._
  val jedis = jedispool.getresource
  var map = map.empty[string, array[byte]]
  if (cols.length > 0) {
   val pipe = jedis.pipelined()
   val response = pipe.hmget(key.getbytes(), cols.map(_.getbytes()): _*)
   pipe.sync()
   map = cols.zip(response.get.asscala).tomap.filter(x => x._2 != null)
   pipe.close()
  } else {
   logger.info(s"key: ${key}")
   val tmpmap: util.map[array[byte], array[byte]] = jedis.hgetall(key.getbytes())
   map = tmpmap.asscala.tomap.map(x => (new string(x._1), x._2))
  }
  jedis.close
  map
 }

 def getcols2(
        key: string,
        cols: array[string] = array.empty
       ): map[string, array[byte]] = {
  val jedis = jedispool.getresource
  var map = map.empty[string, array[byte]]
  if (cols.length > 0) {
   for (col <- cols) {
    val value: array[byte] = jedis.hget(key.getbytes(), col.getbytes())
    if (null != value) {
     map = map + (col -> value)
    }
   }
  } else {
   logger.info(s"rowkey: ${key}")
   val tmpmap: util.map[array[byte], array[byte]] = jedis.hgetall(key.getbytes())
   import scala.collection.javaconverters._
   map = tmpmap.asscala.tomap.map(x => (new string(x._1), x._2))
  }
  jedis.close
  map
 }

 def bulkgetcols(keys: array[string],
         cols: array[string] = array.empty
         ): map[string, map[string, array[byte]]] = {
  import scala.collection.javaconverters._
  var result: map[string, map[string, array[byte]]] = map.empty
  val jedis = jedispool.getresource
  val pipe = jedis.pipelined
  if (cols.length > 0) {
   val data = keys.map(x => {
    pipe.hmget(x.getbytes(), cols.map(_.getbytes()): _*)
   })

   pipe.sync
   pipe.close
   jedis.close

   result = keys.zip(data.map(_.get().asscala.toarray).map(cols.zip(_).tomap.filter(null != _._2)))
    .tomap.filter(_._2.nonempty)
  } else {
   val data: array[response[util.map[array[byte], array[byte]]]] = keys.map(x => {
    pipe.hgetall(x.getbytes())
   })
   pipe.sync
   pipe.close
   jedis.close

   result = keys.zip(data.map(_.get().asscala.map(x => (new string(x._1), x._2)).tomap))
    .tomap.filter(_._2.nonempty)
  }
  result
 }

 def bulkgetcols2(rowkeys: array[string],
         cols: array[string] = array.empty
         ): map[string, map[string, array[byte]]] = {
  val jedis = jedispool.getresource
  var map = map.empty[string, map[string, array[byte]]]
  import scala.collection.javaconverters._
  for (rowkey <- rowkeys) {
   var cellmap = map.empty[string, array[byte]]
   if (cols.length > 0) {
    for (col <- cols) {
     val value = jedis.hget(rowkey.getbytes(), col.getbytes())
     if (null != value) {
      cellmap = cellmap + (col -> value)
     }
    }
   } else {
    logger.info(s"rowkey: ${rowkey}")
    val tmpmap = jedis.hgetall(rowkey.getbytes())
    cellmap = tmpmap.asscala.tomap.map(x => (new string(x._1), x._2))
   }
   if (cellmap.nonempty) {
    map = map + (rowkey -> cellmap)
   }
  }
  jedis.close
  map
 }

 def setcols(
        key: string,
        fieldvalues: map[string, string]
       ): unit = {
  import scala.collection.javaconverters._
  val data = fieldvalues.map(element => {
   (element._1.getbytes(), element._2.getbytes())
  }).asjava
  val jedis = jedispool.getresource
  jedis.hmset(key.getbytes(), data)
  jedis.close()
 }

}

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