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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
* "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.tuscany.sca.binding.notification.util;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Receives notification in HTTP request and dispatches it down the wire
*
* @version $Rev$ $Date$
*/
@SuppressWarnings("serial")
public class NotificationServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
private NotificationServletHandler handler;
private NotificationServletStreamHandler servletStreamHandler;
public NotificationServlet(NotificationServletHandler handler) {
this.handler = handler;
this.servletStreamHandler = null;
}
public NotificationServlet(NotificationServletStreamHandler servletStreamHandler) {
this.handler = null;
this.servletStreamHandler = servletStreamHandler;
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
HashMap<String, String> headers = new HashMap<String, String>();
Enumeration headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements()) {
String headerName = (String)headerNames.nextElement();
headers.put(headerName, request.getHeader(headerName));
}
if (handler != null) {
byte[] requestBody = IOUtils.readFully(request.getInputStream(), request.getContentLength());
byte[] handlersResponse = handler.handle(headers, requestBody);
if (handlersResponse != null) {
response.getOutputStream().write(handlersResponse);
response.getOutputStream().flush();
}
} else {
try {
servletStreamHandler.handle(headers, request.getInputStream(), request.getContentLength(), response.getOutputStream());
} catch(RuntimeException e) {
e.printStackTrace();
}
}
}
public interface NotificationServletHandler {
byte[] handle(Map<String, String> headers, byte[] payload);
}
public interface NotificationServletStreamHandler {
void handle(Map<String, String> headers, ServletInputStream istream, int contentLength, ServletOutputStream ostream);
}
}
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