org.codegist.crest.io.http.HttpClientFactory.java Source code

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Here is the source code for org.codegist.crest.io.http.HttpClientFactory.java

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/*
 * Copyright 2011 CodeGist.org
 *
 *     Licensed 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.
 *
 *  ===================================================================
 *
 *  More information at http://www.codegist.org.
 */

package org.codegist.crest.io.http;

import org.apache.http.HttpVersion;
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.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.ProxySelectorRoutePlanner;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.codegist.crest.CRestConfig;

import java.net.ProxySelector;

/**
 * @author Laurent Gilles (laurent.gilles@codegist.org)
 */
final class HttpClientFactory {

    static final String HTTP_CLIENT = "#user-http-client";
    private static final int HTTP_PORT = 80;
    private static final int HTTPS_PORT = 443;

    private HttpClientFactory() {
        throw new IllegalStateException();
    }

    public static HttpClient create(CRestConfig crestConfig, Class<?> source) {
        HttpClient httpClient = crestConfig.get(source.getName() + HTTP_CLIENT);
        if (httpClient != null) {
            return httpClient;
        }

        int concurrencyLevel = crestConfig.getConcurrencyLevel();
        if (concurrencyLevel > 1) {
            HttpParams params = new BasicHttpParams();
            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
            ConnManagerParams.setMaxConnectionsPerRoute(params, new ConnPerRouteBean(concurrencyLevel));
            ConnManagerParams.setMaxTotalConnections(params, concurrencyLevel);

            SchemeRegistry schemeRegistry = new SchemeRegistry();
            schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), HTTP_PORT));
            schemeRegistry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), HTTPS_PORT));

            ClientConnectionManager cm = new ThreadSafeClientConnManager(params, schemeRegistry);
            httpClient = new DefaultHttpClient(cm, params);
        } else {
            httpClient = new DefaultHttpClient();
        }
        ((DefaultHttpClient) httpClient).setRoutePlanner(new ProxySelectorRoutePlanner(
                httpClient.getConnectionManager().getSchemeRegistry(), ProxySelector.getDefault()));
        return httpClient;
    }
}