| /** |
| * 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 "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.apache.camel.component.http4; |
| |
| import java.io.IOException; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.ExchangePattern; |
| import org.apache.camel.component.http4.helper.HttpHelper; |
| import org.apache.camel.impl.DefaultExchange; |
| |
| /** |
| * @version |
| */ |
| public class CamelServlet extends HttpServlet { |
| |
| private static final long serialVersionUID = -7061982839117697829L; |
| |
| private ConcurrentHashMap<String, HttpConsumer> consumers = new ConcurrentHashMap<String, HttpConsumer>(); |
| |
| @Override |
| protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
| try { |
| |
| // Is there a consumer registered for the request. |
| HttpConsumer consumer = resolve(request); |
| if (consumer == null) { |
| response.sendError(HttpServletResponse.SC_NOT_FOUND); |
| return; |
| } |
| |
| // Have the camel process the HTTP exchange. |
| DefaultExchange exchange = new DefaultExchange(consumer.getEndpoint(), ExchangePattern.InOut); |
| if (((HttpEndpoint)consumer.getEndpoint()).isBridgeEndpoint()) { |
| exchange.setProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.TRUE); |
| } |
| if (consumer.getEndpoint().isDisableStreamCache()) { |
| exchange.setProperty(Exchange.DISABLE_HTTP_STREAM_CACHE, Boolean.TRUE); |
| } |
| HttpHelper.setCharsetFromContentType(request.getContentType(), exchange); |
| exchange.setIn(new HttpMessage(exchange, request, response)); |
| consumer.getProcessor().process(exchange); |
| |
| // HC: The getBinding() is interesting because it illustrates the |
| // impedance miss-match between |
| // HTTP's stream oriented protocol, and Camels more message oriented |
| // protocol exchanges. |
| |
| // now lets output to the response |
| consumer.getBinding().writeResponse(exchange, response); |
| |
| } catch (Exception e) { |
| e.printStackTrace(); |
| throw new ServletException(e); |
| } |
| } |
| |
| protected HttpConsumer resolve(HttpServletRequest request) { |
| String path = request.getPathInfo(); |
| if (path == null) { |
| return null; |
| } |
| HttpConsumer answer = consumers.get(path); |
| |
| if (answer == null) { |
| for (String key : consumers.keySet()) { |
| if (consumers.get(key).getEndpoint().isMatchOnUriPrefix() && path.startsWith(key)) { |
| answer = consumers.get(key); |
| break; |
| } |
| } |
| } |
| return answer; |
| } |
| |
| public void connect(HttpConsumer consumer) { |
| consumers.put(consumer.getPath(), consumer); |
| } |
| |
| public void disconnect(HttpConsumer consumer) { |
| consumers.remove(consumer.getPath()); |
| } |
| |
| } |