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Copyright 2010, Google Inc.
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    * Redistributions of source code must retain the above copyright
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    * Redistributions in binary form must reproduce the above
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contributors may be used to endorse or promote products derived from
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           
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*/

package com.google.refine.appengine;

import java.net.InetAddress;
import java.net.Socket;
import java.util.concurrent.TimeUnit;

import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.ClientConnectionRequest;
import org.apache.http.conn.ManagedClientConnection;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.scheme.SocketFactory;
import org.apache.http.params.HttpParams;

public class AppEngineClientConnectionManager implements ClientConnectionManager {

    private SchemeRegistry schemes;

    class NoopSocketFactory implements SocketFactory {
        public Socket connectSocket(Socket sock, String host, int port, InetAddress addr, int lport, HttpParams params) {
            return null;
        }

        public Socket createSocket() {
            return null;
        }

        public boolean isSecure(Socket sock) {
            return false;
        }
    }

    public AppEngineClientConnectionManager() {
        SocketFactory noop_sf = new NoopSocketFactory();
        schemes = new SchemeRegistry();
        schemes.register(new Scheme("http",  noop_sf, 80));
        schemes.register(new Scheme("https", noop_sf, 443));
    }

    public void closeExpiredConnections() {
        return;
    }

    public void closeIdleConnections(long idletime, TimeUnit tunit) {
        return;
    }

    public ManagedClientConnection getConnection(HttpRoute route, Object state) {
        return new AppEngineClientConnection(route, state);
    }

    public SchemeRegistry getSchemeRegistry() {
        return schemes;
    }

    public void releaseConnection(ManagedClientConnection conn, long valid, TimeUnit tuint) {
        return;
    }

    public ClientConnectionRequest requestConnection(final HttpRoute route, final Object state) {
        return new ClientConnectionRequest() {
            public void abortRequest() {
                return;
            }

            public ManagedClientConnection getConnection(long idletime, TimeUnit tunit) {
                return AppEngineClientConnectionManager.this.getConnection(route, state);
            }
        };
    }

    public void shutdown() {
        return;
    }
}