/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Mar 21, 2012
*/
package com.bigdata.rdf.sail.webapp.client;
import org.eclipse.jetty.client.HttpClient;
/**
* Factory for {@link HttpClient}.
*
* @see Options
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
*/
public class HttpClientConfigurator {
public interface Options {
/**
* This is the name of an optional System property that may be used to
* override the {@link IHttpClientFactory} implementation class (default
* {@value #DEFAULT_CONNECTION_MANAGER_FACTORY_CLASS}).
*/
final static public String CONNECTION_MANAGER_FACTORY_CLASS = HttpClientConfigurator.class
.getName();
/**
* The name of the default {@link IHttpClientFactory} implementation
* class.
*/
final static public String DEFAULT_CONNECTION_MANAGER_FACTORY_CLASS = DefaultHttpClientFactory.class
.getName();
}
/**
* Allow a user configurable factory to allow the override of the
* HttpClient(s) it will return.
*
* @see #CONNECTION_MANAGER_FACTORY_CLASS
*/
public static IHttpClientFactory getInstance() {
final String configuredFactory = System.getProperty(
Options.CONNECTION_MANAGER_FACTORY_CLASS,
Options.DEFAULT_CONNECTION_MANAGER_FACTORY_CLASS);
try {
@SuppressWarnings("unchecked")
final Class<IHttpClientFactory> factoryClass = (Class<IHttpClientFactory>) Class
.forName(configuredFactory);
if (!IHttpClientFactory.class.isAssignableFrom(factoryClass)) {
throw new RuntimeException("Invalid option: "
+ Options.CONNECTION_MANAGER_FACTORY_CLASS + "="
+ factoryClass + ":: Class does not extend "
+ IHttpClientFactory.class);
}
final IHttpClientFactory factory = factoryClass.newInstance();
return factory;
} catch (Exception e) {
throw new RuntimeException("Could not create "
+ IHttpClientFactory.class.getSimpleName() + ": " + e, e);
}
}
}