/*
 * ToroDB
 * Copyright © 2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.torodb.mongodb.repl.impl;

import com.eightkdata.mongowp.client.core.MongoClient;
import com.eightkdata.mongowp.client.core.MongoClientFactory;
import com.eightkdata.mongowp.client.core.MongoConnection;
import com.eightkdata.mongowp.client.core.UnreachableMongoServerException;
import com.google.common.net.HostAndPort;
import com.torodb.mongodb.repl.OplogReader;
import com.torodb.mongodb.repl.OplogReaderProvider;
import com.torodb.mongodb.repl.exceptions.NoSyncSourceFoundException;

import javax.inject.Inject;

/**
 *
 */
public class MongoOplogReaderProvider implements OplogReaderProvider {

  private final MongoClientFactory mongoClientFactory;

  @Inject
  public MongoOplogReaderProvider(MongoClientFactory mongoClientProvider) {
    this.mongoClientFactory = mongoClientProvider;
  }

  @Override
  public OplogReader newReader(HostAndPort syncSource) throws
      NoSyncSourceFoundException, UnreachableMongoServerException {

    MongoClient client = null;
    try {
      client = mongoClientFactory.createClient(syncSource);
      return new ClientOwnerMongoOplogReader(client);
    } catch (Throwable ex) {
      if (client != null) {
        client.close();
      }
      throw ex;
    }
  }

  @Override
  public OplogReader newReader(MongoConnection connection) {
    return new ReusedConnectionOplogReader(connection);
  }

}