/*
* 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.ByteArrayOutputStream;
import java.io.IOException;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import org.springframework.util.FileCopyUtils;
/**
* HTTP request handler that exports the specified service bean as
* Hessian service endpoint, accessible via a Hessian proxy.
* Designed for Sun's JRE 1.6 HTTP server, implementing the
* {@link com.sun.net.httpserver.HttpHandler} interface.
*
* <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 2.5.1
* @see org.springframework.remoting.caucho.HessianClientInterceptor
* @see org.springframework.remoting.caucho.HessianProxyFactoryBean
* @see SimpleBurlapServiceExporter
* @see org.springframework.remoting.httpinvoker.SimpleHttpInvokerServiceExporter
*/
public class SimpleHessianServiceExporter extends HessianExporter implements HttpHandler {
/**
* Processes the incoming Hessian request and creates a Hessian response.
*/
public void handle(HttpExchange exchange) throws IOException {
if (!"POST".equals(exchange.getRequestMethod())) {
exchange.getResponseHeaders().set("Allow", "POST");
exchange.sendResponseHeaders(405, -1);
return;
}
ByteArrayOutputStream output = new ByteArrayOutputStream(1024);
try {
invoke(exchange.getRequestBody(), output);
}
catch (Throwable ex) {
exchange.sendResponseHeaders(500, -1);
logger.error("Hessian skeleton invocation failed", ex);
return;
}
exchange.getResponseHeaders().set("Content-Type", CONTENT_TYPE_HESSIAN);
exchange.sendResponseHeaders(200, output.size());
FileCopyUtils.copy(output.toByteArray(), exchange.getResponseBody());
}
}
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