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Concourse is a self-tuning database that is designed for both ad hoc analytics and high volume transactions at scale. Developers use Concourse to quickly build mission critical software while also benefiting from real time insight into their most important data. With Concourse, end-to-end data management requires no extra infrastructure, no prior configuration and no additional coding–all of which greatly reduce costs and allow developers to focus on core business problems.

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/*
 * Copyright (c) 2013-2019 Cinchapi Inc.
 *
 * 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.cinchapi.concourse;

import java.util.Queue;
import java.util.concurrent.Callable;

import com.cinchapi.concourse.util.ConcurrentLoadingQueue;

/**
 * A {@link ConnectionPool} that has no limit on the number of connections it
 * can managed, but will try to use previously requested connections, where
 * possible.
 * 
 * @author Jeff Nelson
 */
class CachedConnectionPool extends ConnectionPool {

    // Connection Info
    private final String host;
    private final int port;
    private String username;
    private final String password;
    private final String environment;

    /**
     * Construct a new instance.
     * 
     * @param host
     * @param port
     * @param username
     * @param password
     * @param poolSize
     */
    protected CachedConnectionPool(String host, int port, String username,
            String password, int poolSize) {
        this(host, port, username, password, "", poolSize);
    }

    /**
     * Construct a new instance.
     * 
     * @param host
     * @param port
     * @param username
     * @param password
     * @param environment
     * @param poolSize
     */
    protected CachedConnectionPool(String host, int port, String username,
            String password, String environment, int poolSize) {
        super(host, port, username, password, environment, poolSize);
        this.host = host;
        this.port = port;
        this.username = username;
        this.password = password;
        this.environment = environment;
    }

    @Override
    protected Queue buildQueue(int size) {
        return ConcurrentLoadingQueue.create(new Callable() {

            @Override
            public Concourse call() throws Exception {
                return Concourse.connect(host, port, username, password,
                        environment);
            }

        });
    }

    @Override
    protected Concourse getConnection() {
        return available.poll();
    }

}