Java tutorial
/* * Copyright 2012-2017 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.jielicious.storage.mongo; import java.net.URI; import java.net.URISyntaxException; import java.util.Collections; import java.util.Map; import java.util.logging.Level; import java.util.logging.Logger; import com.mongodb.MongoClient; import com.mongodb.MongoClientOptions; import com.mongodb.MongoCredential; import com.mongodb.ServerAddress; import com.mongodb.client.MongoDatabase; import com.redhat.jielicious.storage.mongo.configuration.MongoConfiguration; public class ThermostatMongoStorage { private static MongoClient mongoClient; private static String dbName = "thermostat"; public static void start(Map<String, String> mongoConfiguration) { String username = null; char[] password = null; String host = "127.0.0.1"; int port = 27518; int timeout = 1000; if (mongoConfiguration.containsKey(MongoConfiguration.MONGO_DB.toString())) { dbName = mongoConfiguration.get(MongoConfiguration.MONGO_DB.toString()); } if (mongoConfiguration.containsKey(MongoConfiguration.MONGO_USERNAME.toString())) { username = mongoConfiguration.get(MongoConfiguration.MONGO_USERNAME.toString()); } if (mongoConfiguration.containsKey(MongoConfiguration.MONGO_PASSWORD.toString())) { password = mongoConfiguration.get(MongoConfiguration.MONGO_PASSWORD.toString()).toCharArray(); } if (mongoConfiguration.containsKey(MongoConfiguration.MONGO_URL.toString())) { try { URI url = new URI(mongoConfiguration.get(MongoConfiguration.MONGO_URL.toString())); host = url.getHost(); port = url.getPort(); } catch (URISyntaxException e) { // Do nothing. Defaults will be used. } } if (mongoConfiguration.containsKey(MongoConfiguration.MONGO_SERVER_TIMEOUT.toString())) { timeout = Integer.valueOf(mongoConfiguration.get(MongoConfiguration.MONGO_SERVER_TIMEOUT.toString())); } ServerAddress address = new ServerAddress(host, port); if (username != null && password != null) { MongoCredential credential = MongoCredential.createCredential(username, dbName, password); mongoClient = new MongoClient(address, Collections.singletonList(credential), new MongoClientOptions.Builder().serverSelectionTimeout(timeout).connectTimeout(0) .socketTimeout(0).build()); } else { mongoClient = new MongoClient(address, new MongoClientOptions.Builder().serverSelectionTimeout(timeout) .connectTimeout(0).socketTimeout(0).build()); } Logger mongoLog = Logger.getLogger("org.mongodb.driver"); mongoLog.setLevel(Level.OFF); } public static boolean isConnected() { try { mongoClient.getAddress(); } catch (Exception e) { return false; } return true; } public static void finish() { mongoClient.close(); mongoClient = null; } public static MongoDatabase getDatabase() { return ThermostatMongoStorage.mongoClient.getDatabase(ThermostatMongoStorage.dbName); } }