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A driver for Apache Cassandra 1.2+ that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's binary protocol.

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/*
 *      Copyright (C) 2012 DataStax 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.datastax.driver.core;

import java.net.InetSocketAddress;

/**
 * A connection that is associated to a pool.
 */
class PooledConnection extends Connection {

    private final HostConnectionPool pool;

    PooledConnection(String name, InetSocketAddress address, Factory factory, HostConnectionPool pool) throws ConnectionException, InterruptedException, UnsupportedProtocolVersionException {
        super(name, address, factory);
        this.pool = pool;
    }

    /**
     * Return the pooled connection to it's pool.
     * The connection should generally not be reuse after that.
     */
    public void release() {
        pool.returnConnection(this);
    }

    @Override
    protected void notifyOwnerWhenDefunct(boolean hostIsDown) {
        // This can happen if an exception is thrown at construction time. In
        // that case the pool will handle it itself.
        if (pool == null)
            return;

        if (hostIsDown) {
            pool.closeAsync();
        } else {
            pool.replace(this);
        }
    }
}