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/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package javax.xml.rpc;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Properties;
import java.util.logging.Logger;
import javax.xml.namespace.QName;
/** The javax.xml.rpc.ServiceFactory is an abstract class that provides a
* factory for the creation of instances of the type javax.xml.rpc.Service.
* This abstract class follows the abstract static factory design pattern.
* This enables a J2SE based client to create a Service instance in a portable
* manner without using the constructor of the Service implementation class.
*
* The ServiceFactory implementation class is set using the
* javax.xml.rpc.ServiceFactory System property.
*
* @author Scott.Stark@jboss.org
* @author Thomas.Diesler@jboss.org
* @version 1.1
*/
public abstract class ServiceFactory
{
// provide logging
private static Logger log = Logger.getLogger(ServiceFactory.class.getName());
// The singlton
private static ServiceFactory factory;
/** A constant representing the property used to lookup the name of a ServiceFactory implementation class. */
public static final String SERVICEFACTORY_PROPERTY = "javax.xml.rpc.ServiceFactory";
private static final String DEFAULT_SERVICE_FACTORY = "org.jboss.ws.core.jaxrpc.client.ServiceFactoryImpl";
private static final String[] alternativeFactories = new String[] {};
protected ServiceFactory()
{
}
/** Gets an instance of the ServiceFactory
* Only one copy of a factory exists and is returned to the application each time this method is called.
*
* The implementation class to be used can be overridden by setting the javax.xml.rpc.ServiceFactory system property.
*
* @return The ServiceFactory singleton
* @throws ServiceException on failure to instantiate the ServiceFactory impl
*/
public static ServiceFactory newInstance() throws ServiceException
{
// Create the factory singleton if needed
if (factory == null)
{
PrivilegedAction action = new PropertyAccessAction(SERVICEFACTORY_PROPERTY, DEFAULT_SERVICE_FACTORY);
String factoryName = (String)AccessController.doPrivileged(action);
ClassLoader loader = Thread.currentThread().getContextClassLoader();
try
{
try
{
Class factoryClass = loader.loadClass(factoryName);
factory = (ServiceFactory)factoryClass.newInstance();
}
catch (ClassNotFoundException e)
{
// Throw the exception if the user asked for a specific factory
if (factoryName.equals(DEFAULT_SERVICE_FACTORY) == false)
throw e;
for (int i = 0; i < alternativeFactories.length; i++)
{
factoryName = alternativeFactories[i];
try
{
Class factoryClass = loader.loadClass(factoryName);
return (ServiceFactory)factoryClass.newInstance();
}
catch (ClassNotFoundException e1)
{
log.severe("Cannot load factory: " + factoryName);
}
}
}
}
catch (Throwable e)
{
throw new ServiceException("Failed to create factory: " + factoryName, e);
}
}
if (factory == null)
throw new ServiceException("Cannot find ServiceFactory implementation");
return factory;
}
/**
* Create a <code>Service</code> instance.
*
* @param wsdlDocumentLocation URL for the WSDL document location
* @param serviceName QName for the service.
* @return Service.
* @throws ServiceException If any error in creation of the
* specified service
*/
public abstract Service createService(URL wsdlDocumentLocation, QName serviceName) throws ServiceException;
/**
* Create a <code>Service</code> instance.
*
* @param serviceName QName for the service
* @return Service.
* @throws ServiceException If any error in creation of the specified service
*/
public abstract Service createService(QName serviceName) throws ServiceException;
/** Create an instance of the generated service implementation class for a given service interface, if available.
* @param serviceInterface Service interface
* @return A Service
* @throws ServiceException If there is any error while creating the specified service, including the case where a
* generated service implementation class cannot be located
*/
public abstract Service loadService(Class serviceInterface) throws ServiceException;
/**
* Create an instance of the generated service implementation class for a given service interface, if available.
* An implementation may use the provided wsdlDocumentLocation and properties to help locate the generated implementation class.
* If no such class is present, a ServiceException will be thrown.
*
* @param wsdlDocumentLocation URL for the WSDL document location for the service or null
* @param serviceInterface Service interface
* @param props A set of implementation-specific properties to help locate the generated service implementation class
* @return A Service
* @throws ServiceException If there is any error while creating the specified service, including the case where a
* generated service implementation class cannot be located
*/
public abstract Service loadService(URL wsdlDocumentLocation, Class serviceInterface, Properties props) throws ServiceException;
/**
* Create an instance of the generated service implementation class for a given service, if available.
* The service is uniquely identified by the wsdlDocumentLocation and serviceName arguments.
* An implementation may use the provided properties to help locate the generated implementation class.
* If no such class is present, a ServiceException will be thrown.
*
* @param wsdlDocumentLocation URL for the WSDL document location for the service or null
* @param serviceName Qualified name for the service
* @param props A set of implementation-specific properties to help locate the generated service implementation class
* @return A Service
* @throws ServiceException If there is any error while creating the specified service, including the case where a generated service implementation class cannot be located
*/
public abstract Service loadService(URL wsdlDocumentLocation, QName serviceName, Properties props) throws ServiceException;
private static class PropertyAccessAction implements PrivilegedAction
{
private String name;
private String defaultValue;
PropertyAccessAction(String name, String defaultValue)
{
this.name = name;
this.defaultValue = defaultValue;
}
public Object run()
{
return System.getProperty(name, defaultValue);
}
}
}
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