com.zyxist.dirtyplayground.core.database.DatabaseManagerImpl.java Source code

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Here is the source code for com.zyxist.dirtyplayground.core.database.DatabaseManagerImpl.java

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/*
 * Copyright 2016 Tomasz Jdrzejewski <http://www.zyxist.com/>.
 *
 * 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.zyxist.dirtyplayground.core.database;

import com.zyxist.dirtyplayground.core.svc.ProvidesService;
import com.zyxist.dirtyplayground.core.svc.RequiresServices;
import com.zyxist.dirtyplayground.core.svc.ServiceException;
import com.zyxist.dirtyplayground.core.svc.StartableService;
import io.vertx.core.Vertx;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.mongo.MongoClient;
import java.util.concurrent.CountDownLatch;
import javax.inject.Inject;

@RequiresServices({ Vertx.class })
@ProvidesService(DatabaseManager.class)
public class DatabaseManagerImpl implements DatabaseManager, StartableService {
    @Inject
    private Vertx vertx;
    private boolean connectionSuccessful = false;
    private MongoClient mongo;

    @Override
    public void start() throws InterruptedException, ServiceException {
        CountDownLatch untilStarted = new CountDownLatch(1);
        mongo = MongoClient.createShared(vertx, new JsonObject().put("db_name", "journal"));
        mongo.save("dummy", new JsonObject(), (res) -> {
            connectionSuccessful = res.succeeded();
            untilStarted.countDown();
        });
        untilStarted.await();
        if (!connectionSuccessful) {
            mongo.close();
            throw new ServiceException("Cannot start MongoDB client: connection failed.");
        }
    }

    @Override
    public void stop() {
        if (connectionSuccessful) {
            mongo.close();
        }
    }

    @Override
    public MongoClient mongo() {
        return mongo;
    }
}