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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.client;

import java.net.ProxySelector;

import org.apache.http.ConnectionReuseStrategy;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.routing.HttpRoutePlanner;
import org.apache.http.impl.DefaultConnectionReuseStrategy;
import org.apache.http.impl.NoConnectionReuseStrategy;
import org.apache.http.impl.conn.PoolingClientConnectionManager;
import org.apache.http.impl.conn.ProxySelectorRoutePlanner;
import org.apache.http.impl.conn.SchemeRegistryFactory;
import org.apache.http.params.HttpParams;

/**
 * An extension of {@link DefaultHttpClient} pre-configured using system properties.
 * 
 * The following system properties are taken into account by this class:
 * 

 *  ssl.TrustManagerFactory.algorithm
 *  javax.net.ssl.trustStoreType
 *  javax.net.ssl.trustStore
 *  javax.net.ssl.trustStoreProvider
 *  javax.net.ssl.trustStorePassword
 *  java.home
 *  ssl.KeyManagerFactory.algorithm
 *  javax.net.ssl.keyStoreType
 *  javax.net.ssl.keyStore
 *  javax.net.ssl.keyStoreProvider
 *  javax.net.ssl.keyStorePassword
 *  http.proxyHost
 *  http.proxyPort
 *  https.proxyHost
 *  https.proxyPort
 *  http.nonProxyHosts
 *  http.keepAlive
 *  http.maxConnections
 * 
 * 
 * 

 * The following parameters can be used to customize the behavior of this
 * class:
 * 
 * 
 *  {@link org.apache.http.params.CoreProtocolPNames#PROTOCOL_VERSION}
 *  {@link org.apache.http.params.CoreProtocolPNames#STRICT_TRANSFER_ENCODING}
 *  {@link org.apache.http.params.CoreProtocolPNames#HTTP_ELEMENT_CHARSET}
 *  {@link org.apache.http.params.CoreProtocolPNames#USE_EXPECT_CONTINUE}
 *  {@link org.apache.http.params.CoreProtocolPNames#WAIT_FOR_CONTINUE}
 *  {@link org.apache.http.params.CoreProtocolPNames#USER_AGENT}
 *  {@link org.apache.http.params.CoreConnectionPNames#TCP_NODELAY}
 *  {@link org.apache.http.params.CoreConnectionPNames#SO_TIMEOUT}
 *  {@link org.apache.http.params.CoreConnectionPNames#SO_LINGER}
 *  {@link org.apache.http.params.CoreConnectionPNames#SO_REUSEADDR}
 *  {@link org.apache.http.params.CoreConnectionPNames#SOCKET_BUFFER_SIZE}
 *  {@link org.apache.http.params.CoreConnectionPNames#CONNECTION_TIMEOUT}
 *  {@link org.apache.http.params.CoreConnectionPNames#MAX_LINE_LENGTH}
 *  {@link org.apache.http.params.CoreConnectionPNames#MAX_HEADER_COUNT}
 *  {@link org.apache.http.params.CoreConnectionPNames#STALE_CONNECTION_CHECK}
 *  {@link org.apache.http.conn.params.ConnRoutePNames#FORCED_ROUTE}
 *  {@link org.apache.http.conn.params.ConnRoutePNames#LOCAL_ADDRESS}
 *  {@link org.apache.http.conn.params.ConnRoutePNames#DEFAULT_PROXY}
 *  {@link org.apache.http.cookie.params.CookieSpecPNames#DATE_PATTERNS}
 *  {@link org.apache.http.cookie.params.CookieSpecPNames#SINGLE_COOKIE_HEADER}
 *  {@link org.apache.http.auth.params.AuthPNames#CREDENTIAL_CHARSET}
 *  {@link org.apache.http.client.params.ClientPNames#COOKIE_POLICY}
 *  {@link org.apache.http.client.params.ClientPNames#HANDLE_AUTHENTICATION}
 *  {@link org.apache.http.client.params.ClientPNames#HANDLE_REDIRECTS}
 *  {@link org.apache.http.client.params.ClientPNames#MAX_REDIRECTS}
 *  {@link org.apache.http.client.params.ClientPNames#ALLOW_CIRCULAR_REDIRECTS}
 *  {@link org.apache.http.client.params.ClientPNames#VIRTUAL_HOST}
 *  {@link org.apache.http.client.params.ClientPNames#DEFAULT_HOST}
 *  {@link org.apache.http.client.params.ClientPNames#DEFAULT_HEADERS}
 *  {@link org.apache.http.client.params.ClientPNames#CONN_MANAGER_TIMEOUT}
 * 
 *
 * @since 4.2
 *
 * @deprecated (4.3) use {@link HttpClientBuilder}
 */
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
@Deprecated
public class SystemDefaultHttpClient extends DefaultHttpClient {

    public SystemDefaultHttpClient(final HttpParams params) {
        super(null, params);
    }

    public SystemDefaultHttpClient() {
        super(null, null);
    }

    @Override
    protected ClientConnectionManager createClientConnectionManager() {
        final PoolingClientConnectionManager connmgr = new PoolingClientConnectionManager(
                SchemeRegistryFactory.createSystemDefault());
        String s = System.getProperty("http.keepAlive", "true");
        if ("true".equalsIgnoreCase(s)) {
            s = System.getProperty("http.maxConnections", "5");
            final int max = Integer.parseInt(s);
            connmgr.setDefaultMaxPerRoute(max);
            connmgr.setMaxTotal(2 * max);
        }
        return connmgr;
    }

    @Override
    protected HttpRoutePlanner createHttpRoutePlanner() {
        return new ProxySelectorRoutePlanner(getConnectionManager().getSchemeRegistry(),
                ProxySelector.getDefault());
    }

    @Override
    protected ConnectionReuseStrategy createConnectionReuseStrategy() {
        final String s = System.getProperty("http.keepAlive", "true");
        if ("true".equalsIgnoreCase(s)) {
            return new DefaultConnectionReuseStrategy();
        } else {
            return new NoConnectionReuseStrategy();
        }
    }

}