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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
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.http.impl.conn;

import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.Socket;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;

import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.config.MessageConstraints;
import org.apache.http.conn.ManagedHttpClientConnection;
import org.apache.http.entity.ContentLengthStrategy;
import org.apache.http.impl.DefaultBHttpClientConnection;
import org.apache.http.io.HttpMessageParserFactory;
import org.apache.http.io.HttpMessageWriterFactory;
import org.apache.http.protocol.HttpContext;

/**
 * Default {@link ManagedHttpClientConnection} implementation.
 * @since 4.3
 */
public class DefaultManagedHttpClientConnection extends DefaultBHttpClientConnection
                                 implements ManagedHttpClientConnection, HttpContext {

    private final String id;
    private final Map attributes;

    private volatile boolean shutdown;

    public DefaultManagedHttpClientConnection(
            final String id,
            final int bufferSize,
            final int fragmentSizeHint,
            final CharsetDecoder charDecoder,
            final CharsetEncoder charEncoder,
            final MessageConstraints constraints,
            final ContentLengthStrategy incomingContentStrategy,
            final ContentLengthStrategy outgoingContentStrategy,
            final HttpMessageWriterFactory requestWriterFactory,
            final HttpMessageParserFactory responseParserFactory) {
        super(bufferSize, fragmentSizeHint, charDecoder, charEncoder,
                constraints, incomingContentStrategy, outgoingContentStrategy,
                requestWriterFactory, responseParserFactory);
        this.id = id;
        this.attributes = new ConcurrentHashMap();
    }

    public DefaultManagedHttpClientConnection(
            final String id,
            final int bufferSize) {
        this(id, bufferSize, bufferSize, null, null, null, null, null, null, null);
    }

    @Override
    public String getId() {
        return this.id;
    }

    @Override
    public void shutdown() throws IOException {
        this.shutdown = true;
        super.shutdown();
    }

    @Override
    public Object getAttribute(final String id) {
        return this.attributes.get(id);
    }

    @Override
    public Object removeAttribute(final String id) {
        return this.attributes.remove(id);
    }

    @Override
    public void setAttribute(final String id, final Object obj) {
        this.attributes.put(id, obj);
    }

    @Override
    public void bind(final Socket socket) throws IOException {
        if (this.shutdown) {
            socket.close(); // allow this to throw...
            // ...but if it doesn't, explicitly throw one ourselves.
            throw new InterruptedIOException("Connection already shutdown");
        }
        super.bind(socket);
    }

    @Override
    public Socket getSocket() {
        return super.getSocket();
    }

    @Override
    public SSLSession getSSLSession() {
        final Socket socket = super.getSocket();
        return socket instanceof SSLSocket ? ((SSLSocket) socket).getSession() : null;
    }

}