/*
* Copyright 2002-2009 the original author or authors.
*
* 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.
*/
package org.springframework.remoting.caucho;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.HttpRequestHandler;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.util.NestedServletException;
/**
* Servlet-API-based HTTP request handler that exports the specified service bean
* as Hessian service endpoint, accessible via a Hessian proxy.
*
* <p><b>Note:</b> Spring also provides an alternative version of this exporter,
* for Sun's JRE 1.6 HTTP server: {@link SimpleHessianServiceExporter}.
*
* <p>Hessian is a slim, binary RPC protocol.
* For information on Hessian, see the
* <a href="http://www.caucho.com/hessian">Hessian website</a>.
* <b>Note: As of Spring 3.0, this exporter requires Hessian 3.2 or above.</b>
*
* <p>Hessian services exported with this class can be accessed by
* any Hessian client, as there isn't any special handling involved.
*
* @author Juergen Hoeller
* @since 13.05.2003
* @see HessianClientInterceptor
* @see HessianProxyFactoryBean
* @see org.springframework.remoting.caucho.BurlapServiceExporter
* @see org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter
* @see org.springframework.remoting.rmi.RmiServiceExporter
*/
public class HessianServiceExporter extends HessianExporter implements HttpRequestHandler {
/**
* Processes the incoming Hessian request and creates a Hessian response.
*/
public void handleRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
if (!"POST".equals(request.getMethod())) {
throw new HttpRequestMethodNotSupportedException(request.getMethod(),
new String[] {"POST"}, "HessianServiceExporter only supports POST requests");
}
response.setContentType(CONTENT_TYPE_HESSIAN);
try {
invoke(request.getInputStream(), response.getOutputStream());
}
catch (Throwable ex) {
throw new NestedServletException("Hessian skeleton invocation failed", ex);
}
}
}
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