/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package async;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletContextEvent;
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import javax.servlet.ServletContextListener;
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/*
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* Ensures the Stockticker is shut down cleanly when the context stops. This
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* also covers the case when the server shuts down.
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*/
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public class AsyncStockContextListener implements ServletContextListener {
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public static final String STOCK_TICKER_KEY = "StockTicker";
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@Override
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public void contextInitialized(ServletContextEvent sce) {
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Stockticker stockticker = new Stockticker();
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ServletContext sc = sce.getServletContext();
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sc.setAttribute(STOCK_TICKER_KEY, stockticker);
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}
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@Override
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public void contextDestroyed(ServletContextEvent sce) {
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ServletContext sc = sce.getServletContext();
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Stockticker stockticker = (Stockticker) sc.getAttribute(STOCK_TICKER_KEY);
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stockticker.shutdown();
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}
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}
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