/*
 * 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.
 */

package org.apache.tuscany.sca.host.http.client;

import org.apache.http.HttpHost;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.conn.params.ConnPerRoute;
import org.apache.http.conn.params.ConnPerRouteBean;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.HTTP;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.LifeCycleListener;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;

/**
 * @version $Rev$ $Date$
 */
public class HttpClientFactory implements LifeCycleListener {

    private HttpClient httpClient;

    public static HttpClientFactory getInstance(ExtensionPointRegistry registry) {
        UtilityExtensionPoint utilities = registry.getExtensionPoint(UtilityExtensionPoint.class);
        return utilities.getUtility(HttpClientFactory.class);
    }

    public HttpClient createHttpClient() {
        HttpParams defaultParameters = new BasicHttpParams();
        //defaultParameters.setIntParameter(HttpConnectionManagerParams.MAX_TOTAL_CONNECTIONS, 10);

        ConnManagerParams.setMaxTotalConnections(defaultParameters, 1024);
        ConnPerRoute connPerRoute = new ConnPerRouteBean(256);
        ConnManagerParams.setMaxConnectionsPerRoute(defaultParameters, connPerRoute);

        HttpProtocolParams.setContentCharset(defaultParameters, HTTP.UTF_8);
        HttpConnectionParams.setConnectionTimeout(defaultParameters, 60000);
        HttpConnectionParams.setSoTimeout(defaultParameters, 60000);

        // See https://issues.apache.org/jira/browse/HTTPCLIENT-1138
        SchemeRegistry supportedSchemes = new SchemeRegistry();
        supportedSchemes.register(new Scheme(HttpHost.DEFAULT_SCHEME_NAME, 80, PlainSocketFactory.getSocketFactory()));
        supportedSchemes.register(new Scheme("https", 443, SSLSocketFactory.getSocketFactory()));

        ClientConnectionManager connectionManager =
            new ThreadSafeClientConnManager(defaultParameters, supportedSchemes);

        return new DefaultHttpClient(connectionManager, defaultParameters);
    }

    @Override
    public void start() {
        if (httpClient == null) {
            httpClient = createHttpClient();
        }
    }

    @Override
    public void stop() {
        if (httpClient != null) {
            httpClient.getConnectionManager().shutdown();
            httpClient = null;
        }
    }

    public HttpClient getHttpClient() {
        return httpClient;
    }
}