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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.dubbo.remoting.http.servlet;
import org.apache.dubbo.remoting.http.HttpHandler;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Service dispatcher Servlet.
*/
public class DispatcherServlet extends HttpServlet {
private static final long serialVersionUID = 5766349180380479888L;
private static final Map HANDLERS = new ConcurrentHashMap();
private static DispatcherServlet INSTANCE;
public DispatcherServlet() {
DispatcherServlet.INSTANCE = this;
}
public static void addHttpHandler(int port, HttpHandler processor) {
HANDLERS.put(port, processor);
}
public static void removeHttpHandler(int port) {
HANDLERS.remove(port);
}
public static DispatcherServlet getInstance() {
return INSTANCE;
}
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpHandler handler = HANDLERS.get(request.getLocalPort());
if (handler == null) {// service not found.
response.sendError(HttpServletResponse.SC_NOT_FOUND, "Service not found.");
} else {
handler.handle(request, response);
}
}
}