services/datalab-webapp-common/src/main/java/com/epam/datalab/mongo/MongoServiceFactory.java

/*
 * 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.epam.datalab.mongo;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import io.dropwizard.lifecycle.Managed;
import io.dropwizard.setup.Environment;
import org.hibernate.validator.constraints.NotEmpty;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import java.util.Collections;

// TODO: Separate configuration and factory responsibilities
public class MongoServiceFactory {
    @NotEmpty
    @JsonProperty
    private String host;

    @Min(1)
    @Max(65535)
    @JsonProperty
    private int port;

    @NotEmpty
    @JsonProperty
    private String username;

    @NotEmpty
    @JsonProperty
    private String password;

    @NotEmpty
    @JsonProperty
    private String database;

    public MongoService build(Environment environment) {
        MongoClient client = new MongoClient(new ServerAddress(host, port), Collections.singletonList(
                MongoCredential.createCredential(username, database, password.toCharArray())
        ));
        environment.lifecycle().manage(new Managed() {
            @Override
            public void start() {
            }

            @Override
            public void stop() {
                client.close();
            }
        });
        return new MongoService(client, database);
    }

    public String getHost() {
        return host;
    }

    public int getPort() {
        return port;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }

    public String getDatabase() {
        return database;
    }
}