HttpNIOConnPool.java

/*
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 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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package org.apache.http.impl.nio.conn;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.logging.Log;
import org.apache.http.HttpConnection;
import org.apache.http.HttpHost;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.nio.conn.scheme.Scheme;
import org.apache.http.nio.conn.scheme.SchemeRegistry;
import org.apache.http.nio.pool.AbstractNIOConnPool;
import org.apache.http.nio.reactor.ConnectingIOReactor;
import org.apache.http.nio.reactor.IOSession;
import org.apache.http.protocol.ExecutionContext;

class HttpNIOConnPool extends AbstractNIOConnPool<HttpRoute, IOSession, HttpPoolEntry> {

    private static AtomicLong COUNTER = new AtomicLong();

    private final Log log;
    private final SchemeRegistry schemeRegistry;
    private final long connTimeToLive;
    private final TimeUnit tunit;

    HttpNIOConnPool(
            final Log log,
            final ConnectingIOReactor ioreactor,
            final SchemeRegistry schemeRegistry,
            long connTimeToLive, final TimeUnit tunit) {
        super(ioreactor, 2, 20);
        this.log = log;
        this.schemeRegistry = schemeRegistry;
        this.connTimeToLive = connTimeToLive;
        this.tunit = tunit;
    }

    @Override
    protected SocketAddress resolveLocalAddress(final HttpRoute route) {
        return new InetSocketAddress(route.getLocalAddress(), 0);
    }

    @Override
    protected SocketAddress resolveRemoteAddress(final HttpRoute route) {
        HttpHost firsthop = route.getProxyHost();
        if (firsthop == null) {
            firsthop = route.getTargetHost();
        }
        String hostname = firsthop.getHostName();
        int port = firsthop.getPort();
        if (port < 0) {
            Scheme scheme = this.schemeRegistry.getScheme(firsthop);
            port = scheme.resolvePort(port);
        }
        return new InetSocketAddress(hostname, port);
    }

    @Override
    protected HttpPoolEntry createEntry(final HttpRoute route, final IOSession session) {
        String id = Long.toString(COUNTER.getAndIncrement());
        return new HttpPoolEntry(this.log, id, route, session, this.connTimeToLive, this.tunit);
    }

    @Override
    protected void closeEntry(final HttpPoolEntry entry) {
        IOSession session = entry.getConnection();
        HttpConnection conn = (HttpConnection) session.getAttribute(
                ExecutionContext.HTTP_CONNECTION);
        try {
            conn.shutdown();
        } catch (IOException ex) {
            if (this.log.isDebugEnabled()) {
                this.log.debug("I/O error shutting down connection", ex);
            }
        }
    }

    @Override
    protected IOSession createConnection(final HttpRoute route, final IOSession session) {
        return session;
    }

}