com.glaf.core.container.MongodbContainer.java Source code

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Here is the source code for com.glaf.core.container.MongodbContainer.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.glaf.core.container;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;

import com.glaf.core.config.SystemProperties;
import com.glaf.core.util.IOUtils;
import com.glaf.core.util.PropertiesUtils;
import com.glaf.core.util.ShutdownHookManager;
import com.glaf.core.util.StringTools;
import com.mongodb.client.MongoDatabase;
import com.mongodb.DB;
import com.mongodb.MongoClient;
import com.mongodb.ServerAddress;
import com.mongodb.WriteConcern;

public class MongodbContainer {

    public static final String MONGODB_CONFIG = "/conf/mongodb.properties";

    protected static volatile Properties properties = new Properties();

    protected static AtomicBoolean loading = new AtomicBoolean(false);

    protected MongoClient mongoClient;

    private MongodbContainer() {
        reload();
        init();
    }

    private static class MongodbSingletonHolder {
        public static MongodbContainer instance = new MongodbContainer();
    }

    private synchronized void init() {
        if (mongoClient == null) {
            String servers = getString("servers");
            if (servers == null) {
                servers = "127.0.0.1:27017";
            }
            List<String> list = StringTools.split(servers, ",");
            List<ServerAddress> addrList = new ArrayList<ServerAddress>();
            for (String server : list) {
                String host = server.substring(0, server.indexOf(":"));
                int port = Integer.parseInt(server.substring(server.indexOf(":") + 1, server.length()));
                try {
                    ServerAddress addr = new ServerAddress(host, port);
                    addrList.add(addr);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
            mongoClient = new MongoClient(addrList);
            mongoClient.setWriteConcern(WriteConcern.JOURNALED);
            Runnable shutdownHook = new MongodbShutdownHook(mongoClient);
            ShutdownHookManager.get().addShutdownHook(shutdownHook, Thread.NORM_PRIORITY);
        }
    }

    public MongoDatabase getDatabase(String dbname) {
        return getMongoClient().getDatabase(dbname);
    }

    @SuppressWarnings("deprecation")
    public DB getDB(String dbName) {
        return getMongoClient().getDB(dbName);
    }

    private MongoClient getMongoClient() {
        if (mongoClient == null) {
            this.init();
        }
        return mongoClient;
    }

    public static boolean getBoolean(String key) {
        if (hasObject(key)) {
            String value = properties.getProperty(key);
            return Boolean.valueOf(value).booleanValue();
        }
        return false;
    }

    public static double getDouble(String key) {
        if (hasObject(key)) {
            String value = properties.getProperty(key);
            return Double.valueOf(value).doubleValue();
        }
        return 0;
    }

    public static MongodbContainer getInstance() {
        return MongodbSingletonHolder.instance;
    }

    public static int getInt(String key) {
        if (hasObject(key)) {
            String value = properties.getProperty(key);
            return Integer.valueOf(value).intValue();
        }
        return 0;
    }

    public static long getLong(String key) {
        if (hasObject(key)) {
            String value = properties.getProperty(key);
            return Long.valueOf(value).longValue();
        }
        return 0;
    }

    public static Properties getProperties() {
        Properties p = new Properties();
        Enumeration<?> e = properties.keys();
        while (e.hasMoreElements()) {
            String key = (String) e.nextElement();
            String value = properties.getProperty(key);
            p.put(key, value);
        }
        return p;
    }

    public static String getString(String key) {
        if (hasObject(key)) {
            String value = properties.getProperty(key);
            return value;
        }
        return "";
    }

    public static boolean hasObject(String key) {
        if (key == null || properties == null) {
            return false;
        }
        String value = properties.getProperty(key);
        if (value != null) {
            return true;
        }
        return false;
    }

    private synchronized void reload() {
        if (!loading.get()) {
            InputStream inputStream = null;
            try {
                loading.set(true);

                String filename = SystemProperties.getConfigRootPath() + MONGODB_CONFIG;
                inputStream = new FileInputStream(filename);
                System.out.println("load mongodb properties:" + filename);
                Properties p = PropertiesUtils.loadProperties(inputStream);
                if (p != null) {
                    Enumeration<?> e = p.keys();
                    while (e.hasMoreElements()) {
                        String key = (String) e.nextElement();
                        String value = p.getProperty(key);
                        properties.setProperty(key, value);
                        properties.setProperty(key.toLowerCase(), value);
                        properties.setProperty(key.toUpperCase(), value);
                    }
                }
            } catch (Exception ex) {
                ex.printStackTrace();
                throw new RuntimeException(ex);
            } finally {
                loading.set(false);
                IOUtils.closeStream(inputStream);
            }
        }
    }

    protected synchronized void reloadAndReset() {
        reload();
        if (mongoClient != null) {
            mongoClient.close();
            mongoClient = null;
        }
        init();
    }

}