com.linkedin.pinot.transport.config.ConnectionPoolConfig.java Source code

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Here is the source code for com.linkedin.pinot.transport.config.ConnectionPoolConfig.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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.linkedin.pinot.transport.config;

import org.apache.commons.configuration.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ConnectionPoolConfig {

    // ThreadPool config for the Async Connection Pool
    public static final String THREAD_POOL_KEY = "threadPool";

    // Minimum number of live connections for each server
    public static final String MIN_CONNECTIONS_PER_SERVER_KEY = "minConnectionsPerServer";

    // Maximum number of live connections for each server
    public static final String MAX_CONNECTIONS_PER_SERVER_KEY = "maxConnectionsPerServer";

    // Maximum number of pending checkout requests before requests starts getting rejected
    public static final String MAX_BACKLOG_PER_SERVER_KEY = "maxBacklogPerServer";

    // Idle Timeout (ms) for reaping idle connections
    public static final String IDLE_TIMEOUT_MS_KEY = "idleTimeoutMs";

    private final int DEFAULT_MIN_CONNECTIONS_PER_SERVER = 10;
    private final int DEFAULT_MAX_CONNECTIONS_PER_SERVER = 30;
    private final int DEFAULT_MAX_BACKLOG_PER_SERVER = 30;
    private static final long DEFAULT_IDLE_TIMEOUT_MS = 6 * 60L * 60 * 1000L; // 6 hours

    // ThreadPool config for the Async Connection Pool
    private ThreadPoolConfig _threadPool;

    // Minimum number of live connections for each server
    private int _minConnectionsPerServer;

    // Maximum number of live connections for each server
    private int _maxConnectionsPerServer;

    // Maximum number of pending checkout requests before requests starts getting rejected
    private int _maxBacklogPerServer;

    // Idle Timeout (ms) for reaping idle connections
    private long _idleTimeoutMs;

    private static final Logger LOGGER = LoggerFactory.getLogger(ConnectionPoolConfig.class);

    public ConnectionPoolConfig() {
        _threadPool = new ThreadPoolConfig();
        _minConnectionsPerServer = DEFAULT_MIN_CONNECTIONS_PER_SERVER;
        _maxConnectionsPerServer = DEFAULT_MAX_CONNECTIONS_PER_SERVER;
        _maxBacklogPerServer = DEFAULT_MAX_BACKLOG_PER_SERVER;
        _idleTimeoutMs = DEFAULT_IDLE_TIMEOUT_MS;
    }

    public void init(Configuration cfg) {
        if (cfg.containsKey(THREAD_POOL_KEY)) {
            _threadPool.init(cfg.subset(THREAD_POOL_KEY));
        }

        if (cfg.containsKey(IDLE_TIMEOUT_MS_KEY)) {
            _idleTimeoutMs = cfg.getLong(IDLE_TIMEOUT_MS_KEY);
        }

        if (cfg.containsKey(MIN_CONNECTIONS_PER_SERVER_KEY)) {
            _minConnectionsPerServer = cfg.getInt(MIN_CONNECTIONS_PER_SERVER_KEY);
        }

        if (cfg.containsKey(MAX_CONNECTIONS_PER_SERVER_KEY)) {
            _maxConnectionsPerServer = cfg.getInt(MAX_CONNECTIONS_PER_SERVER_KEY);
        }

        if (cfg.containsKey(MAX_BACKLOG_PER_SERVER_KEY)) {
            _maxBacklogPerServer = cfg.getInt(MAX_BACKLOG_PER_SERVER_KEY);
        }

        if (_minConnectionsPerServer > _maxConnectionsPerServer || _maxConnectionsPerServer <= 0
                || _minConnectionsPerServer < 1) {
            LOGGER.warn(
                    "Invalid values for " + MIN_CONNECTIONS_PER_SERVER_KEY + "({}) and "
                            + MAX_CONNECTIONS_PER_SERVER_KEY + "({}). Resetting to defaults:",
                    _minConnectionsPerServer, _maxConnectionsPerServer);
            _minConnectionsPerServer = DEFAULT_MIN_CONNECTIONS_PER_SERVER;
            _maxConnectionsPerServer = DEFAULT_MAX_CONNECTIONS_PER_SERVER;
        }
        if (_idleTimeoutMs < 0) {
            LOGGER.warn("Invalid value for " + IDLE_TIMEOUT_MS_KEY + "({}). Resetting to default.");
            _idleTimeoutMs = DEFAULT_IDLE_TIMEOUT_MS;
        }
        if (_maxBacklogPerServer < 0) {
            LOGGER.warn("Invalid value for " + MAX_BACKLOG_PER_SERVER_KEY + "({}). Resetting to default.");
            _maxBacklogPerServer = DEFAULT_MAX_BACKLOG_PER_SERVER;
        }

        LOGGER.info(toString());
    }

    public String toString() {
        return "threadPool = " + _threadPool + ", idleTimeoutMs = " + _idleTimeoutMs
                + ", minConnectionsPerServer = " + _minConnectionsPerServer + ", maxConnectionsPerServer = "
                + _maxConnectionsPerServer + ", maxBacklogPerServer = " + _maxBacklogPerServer;
    }

    public ThreadPoolConfig getThreadPool() {
        return _threadPool;
    }

    public int getMinConnectionsPerServer() {
        return _minConnectionsPerServer;
    }

    public int getMaxConnectionsPerServer() {
        return _maxConnectionsPerServer;
    }

    public int getMaxBacklogPerServer() {
        return _maxBacklogPerServer;
    }

    public long getIdleTimeoutMs() {
        return _idleTimeoutMs;
    }

}