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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 javax.servlet.ServletContext;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * TODO this may not be a pretty elegant solution,
 *
 */
public class ServletManager {

    public static final int EXTERNAL_SERVER_PORT = -1234;

    private static final ServletManager INSTANCE = new ServletManager();

    private final Map contextMap = new ConcurrentHashMap();

    public static ServletManager getInstance() {
        return INSTANCE;
    }

    public void addServletContext(int port, ServletContext servletContext) {
        contextMap.put(port, servletContext);
    }

    public void removeServletContext(int port) {
        contextMap.remove(port);
    }

    public ServletContext getServletContext(int port) {
        return contextMap.get(port);
    }
}