content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.flink.streaming.connectors.redis.common.container;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import redis.clients.jedis.Jedis;
  import redis.clients.jedis.JedisPool;
  import redis.clients.jedis.JedisSentinelPool;
  
  import java.io.Closeable;
  import java.io.IOException;
  import java.util.Objects;
  
  /**
   * Redis command container if we want to connect to a single Redis server or to Redis sentinels
   * If want to connect to a single Redis server, please use the first constructor {@link #RedisContainer(JedisPool)}.
   * If want to connect to a Redis sentinels, please use the second constructor {@link #RedisContainer(JedisSentinelPool)}
   */
  public class RedisContainer implements RedisCommandsContainer, Closeable {
  
      private static final long serialVersionUID = 1L;
  
      private static final Logger LOG = LoggerFactory.getLogger(RedisContainer.class);
  
      private transient JedisPool jedisPool;
      private transient JedisSentinelPool jedisSentinelPool;
  
      /**
       * Use this constructor if to connect with single Redis server.
       *
       * @param jedisPool JedisPool which actually manages Jedis instances
       */
      public RedisContainer(JedisPool jedisPool) {
          Objects.requireNonNull(jedisPool, "Jedis Pool can not be null");
          this.jedisPool = jedisPool;
          this.jedisSentinelPool = null;
      }
  
      /**
       * Use this constructor if Redis environment is clustered with sentinels.
       *
       * @param sentinelPool SentinelPool which actually manages Jedis instances
       */
      public RedisContainer(final JedisSentinelPool sentinelPool) {
          Objects.requireNonNull(sentinelPool, "Jedis Sentinel Pool can not be null");
          this.jedisPool = null;
          this.jedisSentinelPool = sentinelPool;
      }
  
      /**
       * Closes the Jedis instances.
       */
      @Override
      public void close() throws IOException {
          if (this.jedisPool != null) {
              this.jedisPool.close();
          }
          if (this.jedisSentinelPool != null) {
              this.jedisSentinelPool.close();
          }
      }
  
      @Override
      public void open() throws Exception {
  
          // echo() tries to open a connection and echos back the
          // message passed as argument. Here we use it to monitor
          // if we can communicate with the cluster.
  
          getInstance().echo("Test");
      }
  
      @Override
      public void hset(final String key, final String hashField, final String value, final Integer ttl) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.hset(key, hashField, value);
              if (ttl != null) {
                  jedis.expire(key, ttl);
              }
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command HSET to key {} and hashField {} error message {}",
                      key, hashField, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void hincrBy(final String key, final String hashField, final Long value, final Integer ttl) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.hincrBy(key, hashField, value);
              if (ttl != null) {
                  jedis.expire(key, ttl);
              }
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command HINCRBY to key {} and hashField {} error message {}",
                          key, hashField, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void hdel(String key, String hashField) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.hdel(key, hashField);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command HDEL to key {} and hashField {} error message {}",
                      key, hashField, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void rpush(final String listName, final String value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.rpush(listName, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command RPUSH to list {} error message {}",
                      listName, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void lpush(String listName, String value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.lpush(listName, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command LPUSH to list {} error message {}",
                      listName, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void sadd(final String setName, final String value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.sadd(setName, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command SADD to set {} error message {}",
                      setName, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void srem(final String setName, final String value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.srem(setName, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command SREM to set {} error message {}",
                      setName, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void publish(final String channelName, final String message) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.publish(channelName, message);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command PUBLISH to channel {} error message {}",
                      channelName, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void set(final String key, final String value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.set(key, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command SET to key {} error message {}",
                      key, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void setex(final String key, final String value, final Integer ttl) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.setex(key, ttl, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command SETEX to key {} error message {}",
                          key, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void pfadd(final String key, final String element) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.pfadd(key, element);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command PFADD to key {} error message {}",
                      key, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void zadd(final String key, final String score, final String element) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.zadd(key, Double.valueOf(score), element);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command ZADD to set {} error message {}",
                      key, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void zincrBy(final String key, final String score, final String element) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.zincrby(key, Double.valueOf(score), element);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command ZINCRBY to set {} error message {}",
                          key, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void zrem(final String key, final String element) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.zrem(key, element);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis message with command ZREM to set {} error message {}",
                          key, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      /**
       * Returns Jedis instance from the pool.
       *
       * @return the Jedis instance
       */
      private Jedis getInstance() {
          if (jedisSentinelPool != null) {
              return jedisSentinelPool.getResource();
          } else {
              return jedisPool.getResource();
          }
      }
  
      /**
       * Closes the jedis instance after finishing the command.
       *
       * @param jedis The jedis instance
       */
      private void releaseInstance(final Jedis jedis) {
          if (jedis == null) {
              return;
          }
          try {
              jedis.close();
          } catch (Exception e) {
              LOG.error("Failed to close (return) instance to pool", e);
          }
      }
  
      @Override
      public void incrByEx(String key, Long value, Integer ttl) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.incrBy(key, value);
              if (ttl != null) {
                  jedis.expire(key, ttl);
              }
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis with incrby command to key {} with increment {}  with ttl {} error message {}",
                          key, value, ttl, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void decrByEx(String key, Long value, Integer ttl) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.decrBy(key, value);
              if (ttl != null) {
                  jedis.expire(key, ttl);
              }
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis with decrBy command to key {} with decrement {}  with ttl {} error message {}",
                          key, value, ttl, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void incrBy(String key, Long value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.incrBy(key, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis with incrby command to key {} with increment {}  error message {}",
                          key, value, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  
      @Override
      public void decrBy(String key, Long value) {
          Jedis jedis = null;
          try {
              jedis = getInstance();
              jedis.decrBy(key, value);
          } catch (Exception e) {
              if (LOG.isErrorEnabled()) {
                  LOG.error("Cannot send Redis with decrBy command to key {} with increment {}  error message {}",
                          key, value, e.getMessage());
              }
              throw e;
          } finally {
              releaseInstance(jedis);
          }
      }
  }
  