com.healthcit.analytics.dao.HttpClientWrapper.java Source code

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Here is the source code for com.healthcit.analytics.dao.HttpClientWrapper.java

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/*******************************************************************************
 * Copyright (c) 2013 HealthCare It, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the BSD 3-Clause license
 * which accompanies this distribution, and is available at
 * http://directory.fsf.org/wiki/License:BSD_3Clause
 * 
 * Contributors:
 *     HealthCare It, Inc - initial API and implementation
 ******************************************************************************/
package com.healthcit.analytics.dao;

import org.apache.http.HttpVersion;
import org.apache.http.conn.ClientConnectionManager;
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;

public class HttpClientWrapper extends DefaultHttpClient {

    private static HttpClientWrapper httpClient = null;

    protected HttpClientWrapper() {
    }

    protected HttpClientWrapper(ClientConnectionManager manager, HttpParams params) {
        super(manager, params);
    }

    /**
     * @return The unique instance of this class.
     */
    public static synchronized HttpClientWrapper getHttpClient() {
        if (httpClient == null) {
            HttpParams params = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(params, 20 * 1000);
            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);

            SchemeRegistry schemeRegistry = new SchemeRegistry();
            schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
            schemeRegistry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));

            ClientConnectionManager cm = new ThreadSafeClientConnManager(params, schemeRegistry);

            httpClient = new HttpClientWrapper(cm, params);
        }
        return httpClient;
    }

    public static synchronized void shutDown() {
        if (httpClient != null) {
            // When HttpClient instance is no longer needed,
            // shut down the connection manager to ensure
            // immediate deallocation of all system resources
            httpClient.getConnectionManager().shutdown();
        }
    }
}