in.tum.de.ase.db.EnvironmentInitializer.java Source code

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Here is the source code for in.tum.de.ase.db.EnvironmentInitializer.java

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/*******************************************************************************
 * Copyright 2016 Amit Kumar Mondal
 *
 * Licensed 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 in.tum.de.ase.db;

import org.jongo.Jongo;
import org.jongo.MongoCollection;
import org.jongo.marshall.jackson.JacksonMapper;
import org.jongo.marshall.jackson.JacksonMapper.Builder;
import org.parse4j.Parse;

import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
import com.fasterxml.jackson.datatype.jsr310.JSR310Module;
import com.google.common.base.Preconditions;
import com.mongodb.DB;
import com.mongodb.Mongo;

import in.tum.de.ase.configurables.Configuration;

/**
 * Initializes the provided Command line Configuration for Bus System
 *
 * @author AMIT KUMAR MONDAL
 *
 */
public final class EnvironmentInitializer {

    /**
     * Singleton Instance
     */
    private static final EnvironmentInitializer INSTANCE = new EnvironmentInitializer();

    /**
     * Returns the Singleton Instance
     */
    public static EnvironmentInitializer getInstance() {
        return INSTANCE;
    }

    /**
     * The MongoDB Collection Object Reference
     */
    private MongoCollection collection;

    /**
     * The MongoDB Database Object Reference
     */
    private DB db;

    /**
     * Jongo Reference
     */
    private Jongo jongo;

    /**
     * MongoDB Object Reference
     */
    private Mongo mongo;

    /**
     * Private Constructor
     */
    private EnvironmentInitializer() {
        // Singleton
    }

    /**
     * Getter for MongoDB Collection
     */
    public MongoCollection getCollection() {
        return this.collection;
    }

    /**
     * Getter for Jongo
     */
    public Jongo getJongo() {
        return this.jongo;
    }

    /**
     * Initializes the Application Environment with the provided
     * {@link Configuration}
     *
     * @param configuration
     *            the actual provided configuration to be used for
     *            initialization
     */
    @SuppressWarnings("deprecation")
    public void setUp(final Configuration configuration) {
        Preconditions.checkNotNull(configuration);

        // Local Database Initialization
        {
            this.mongo = new Mongo(configuration.getServer(), configuration.getPort());
            this.db = this.mongo.getDB(configuration.getDb());

            // Registering JDK8 Module for parsing JDK8 classes
            final Builder tmpMapper = new JacksonMapper.Builder();
            for (final Module module : ObjectMapper.findModules()) {
                tmpMapper.registerModule(module);
            }
            tmpMapper.enable(MapperFeature.AUTO_DETECT_GETTERS);
            tmpMapper.registerModule(new JSR310Module()).registerModule(new Jdk8Module());

            this.jongo = new Jongo(this.db, tmpMapper.build());
            this.collection = this.jongo.getCollection(configuration.getCollection());
        }

        // initialize the Parse Component
        Parse.initialize(configuration.getApplicationId(), configuration.getApplicationRestApiId());
    }

}