com.epam.dlab.mongo.MongoService.java Source code

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/***************************************************************************
    
Copyright (c) 2016, EPAM SYSTEMS INC
    
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 com.epam.dlab.mongo;

import com.mongodb.MongoClient;
import com.mongodb.WriteConcern;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;

public class MongoService {
    private MongoClient client;
    private String databaseName;
    private MongoDatabase database;

    private static final Document PING = new Document("ping", "1");

    public MongoService(MongoClient client, String databaseName, WriteConcern writeConcern) {
        this(client, databaseName);
        database = database.withWriteConcern(writeConcern);
    }

    public MongoService(MongoClient client, String databaseName) {
        this.client = client;
        this.databaseName = databaseName;
        this.database = client.getDatabase(databaseName);
    }

    public boolean collectionExists(String name) {
        for (String c : database.listCollectionNames()) {
            if (c.equals(name)) {
                return true;
            }
        }
        return false;
    }

    public MongoCollection<Document> getCollection(String name) {
        return database.getCollection(name, Document.class);
    }

    public <T> MongoCollection<T> getCollection(String name, Class<T> c) {
        return database.getCollection(name, c);
    }

    public void createCollection(String name) {
        database.createCollection(name);
    }

    public String getDatabaseName() {
        return databaseName;
    }

    public MongoClient getClient() {
        return client;
    }

    public Document ping() {
        return database.runCommand(PING);
    }
}