com.pinterest.pinlater.backends.redis.RedisPools.java Source code

Introduction

Here is the source code for com.pinterest.pinlater.backends.redis.RedisPools.java

Source

/**
 * 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 com.pinterest.pinlater.backends.redis;

import org.apache.commons.configuration.PropertiesConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.exceptions.JedisConnectionException;

import java.util.concurrent.TimeUnit;

/**
 * Helper class used by the PinLaterRedisBackend to encapsulate Redis pools.
 */
public class RedisPools {

    private static final Logger LOG = LoggerFactory.getLogger(RedisPools.class);

    private final String host;
    private final int port;
    private final boolean dequeueOnly;
    private final JedisPool generalRedisPool;
    private final JedisPool monitorRedisPool;

    public RedisPools(PropertiesConfiguration configuration, String host, int port, boolean dequeueOnly) {
        int numGeneralConnections = configuration.getInt("BACKEND_CONNECTIONS_PER_SHARD");
        int generalSocketTimeoutMillis = (int) TimeUnit.SECONDS
                .toMillis(configuration.getInt("BACKEND_SOCKET_TIMEOUT_SECONDS"));
        int numMonitorConnections = configuration.getInt("MONITOR_CONNECTIONS_PER_SHARD", 3);
        int monitorSocketTimeoutMillis = (int) TimeUnit.SECONDS
                .toMillis(configuration.getInt("MONITOR_SOCKET_TIMEOUT_SECONDS", 10));
        int maxWaitMillis = configuration.getInt("BACKEND_CONNECTION_MAX_WAIT_MILLIS");
        this.host = host;
        this.port = port;
        this.dequeueOnly = dequeueOnly;
        this.generalRedisPool = createRedisPool(host, port, numGeneralConnections, maxWaitMillis,
                generalSocketTimeoutMillis);
        this.monitorRedisPool = createRedisPool(host, port, numMonitorConnections, maxWaitMillis,
                monitorSocketTimeoutMillis);
    }

    public String getHost() {
        return host;
    }

    public int getPort() {
        return port;
    }

    public boolean getDequeueOnly() {
        return dequeueOnly;
    }

    public JedisPool getGeneralRedisPool() {
        return generalRedisPool;
    }

    public JedisPool getMonitorRedisPool() {
        return monitorRedisPool;
    }

    private static JedisPool createRedisPool(String host, int port, int poolSize, int maxWaitMillis,
            int socketTimeoutMillis) {
        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxWait(maxWaitMillis);
        config.setMaxActive(poolSize);
        config.setMaxIdle(poolSize);
        // Deal with idle connection eviction.
        config.setTestOnBorrow(false);
        config.setTestOnReturn(false);
        config.setTestWhileIdle(true);
        config.setMinEvictableIdleTimeMillis(5 * 60 * 1000);
        config.setTimeBetweenEvictionRunsMillis(3 * 60 * 1000);
        config.setNumTestsPerEvictionRun(poolSize);

        JedisPool pool = new JedisPool(config, host, port, socketTimeoutMillis);
        // Force connection pool initialization.
        Jedis jedis = null;
        try {
            jedis = pool.getResource();
        } catch (JedisConnectionException e) {
            LOG.error(String.format(
                    "Failed to get a redis connection when creating redis pool, " + "host: %s, port: %d", host,
                    port), e);
        } finally {
            pool.returnResource(jedis);
        }
        return pool;
    }
}