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Cayenne Object Persistence Framework
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* 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
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* KIND, either express or implied. See the License for the
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package org.apache.cayenne.remote.hessian.service;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.cayenne.remote.hessian.EnumSerializerProxy;
import org.apache.cayenne.remote.hessian.HessianConfig;
import org.apache.cayenne.remote.service.HttpRemoteService;
import com.caucho.hessian.io.SerializerFactory;
import com.caucho.services.server.Service;
import com.caucho.services.server.ServiceContext;
/**
* An implementation of RemoteService using binary Hessian protocol. For more info on
* Hessian see http://www.caucho.com/resin-3.0/protocols/hessian.xtp.
*
* @see org.apache.cayenne.remote.hessian.service.HessianServlet
* @see org.apache.cayenne.remote.RemoteService
* @since 1.2
* @author Andrus Adamchik
*/
public class HessianService extends HttpRemoteService implements Service {
public static final String[] SERVER_SERIALIZER_FACTORIES = new String[] {
EnumSerializerProxy.class.getName(), ServerSerializerFactory.class.getName()
};
/**
* Extracts parameters from ServletConfig and initializes the service.
*/
public void init(ServletConfig config) throws ServletException {
Map properties = new HashMap();
Enumeration en = config.getInitParameterNames();
while (en.hasMoreElements()) {
String name = (String) en.nextElement();
properties.put(name, config.getInitParameter(name));
}
initService(properties);
}
/**
* Creates a Hessian SerializerFactory with Cayenne extensions.
*/
SerializerFactory createSerializerFactory() {
return HessianConfig.createFactory(SERVER_SERIALIZER_FACTORIES, getRootChannel()
.getEntityResolver());
}
protected HttpSession getSession(boolean create) {
HttpServletRequest request = (HttpServletRequest) ServiceContext
.getContextRequest();
if (request == null) {
throw new IllegalStateException(
"Attempt to access HttpSession outside the request scope.");
}
return request.getSession(create);
}
public void destroy() {
destroyService();
}
}
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