/* * Copyright 2002-2008 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>. * * <p>This exporter will work with both Hessian 2.x and 3.x (respectively * Resin 2.x and 3.x), autodetecting the corresponding skeleton class. * As of Spring 2.0, it is also compatible with the new Hessian 2 protocol * (a.k.a. Hessian 3.0.20+), while remaining compatible with older versions. * * <p>Note: 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"); } try { invoke(request.getInputStream(), response.getOutputStream()); } catch (Throwable ex) { throw new NestedServletException("Hessian skeleton invocation failed", ex); } } }