com.appeligo.captions.LuceneInitializer.java Source code

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Here is the source code for com.appeligo.captions.LuceneInitializer.java

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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 com.appeligo.captions;

import java.io.IOException;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.commons.configuration.Configuration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;

import com.appeligo.lucene.LuceneIndexer;
import com.appeligo.search.util.ConfigUtils;

/**
 * Provides basic initialization of the configuration subsystem for this application.
 * 
 */
public class LuceneInitializer implements ServletContextListener {

    private static final Log log = LogFactory.getLog(LuceneInitializer.class);

    /**
     * Expected to initialize n servlet initializaton.
     */
    public void contextInitialized(ServletContextEvent event) {

        Configuration config = ConfigUtils.getSystemConfig();
        String programIndex = config.getString("luceneIndex");
        String compositeIndex = config.getString("compositeIndex");
        String spellIndex = config.getString("spellIndex");
        String liveIndex = config.getString("luceneLiveIndex");
        String productIndex = config.getString("luceneProductIndex");
        unlockIndex(programIndex);
        unlockIndex(compositeIndex);
        unlockIndex(spellIndex);
        unlockIndex(liveIndex);
        unlockIndex(productIndex);
    }

    private void unlockIndex(String indexLocation) {
        if (IndexReader.indexExists(indexLocation)) {
            try {
                if (IndexReader.isLocked(indexLocation)) {
                    Directory directory = FSDirectory.getDirectory(indexLocation);
                    IndexReader.unlock(directory);
                }
            } catch (IOException e) {
                log.fatal("Error trying to unlock " + indexLocation + " index.", e);
            }
        }
    }

    public void contextDestroyed(ServletContextEvent event) {
        log.debug("Trying to exit LuceneIndexer threads gracefully");
        LuceneIndexer.shutdownAll();
        log.debug("All LuceneIndexer threads have shutdown.");
    }

}