HBaseConfigurationFactory.java

/*
 * This is a common dao with basic CRUD operations and is not limited to any
 * persistent layer implementation
 *
 * Copyright (C) 2010  Imran M Yousuf (imyousuf@smartitengineering.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * This library 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
 * Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package com.smartitengineering.dao.impl.hbase;

import com.smartitengineering.util.bean.BeanFactoryRegistrar;
import com.smartitengineering.util.bean.annotations.Aggregator;
import com.smartitengineering.util.bean.annotations.InjectableField;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author imyousuf
 */
@Aggregator(contextName = "com.smartitengineering.dao.impl.hbase")
public class HBaseConfigurationFactory {

  private final static Logger LOGGER = LoggerFactory.getLogger(HBaseConfigurationFactory.class);
  private static HBaseConfigurationFactory configurationFactory;
  @InjectableField
  private Configuration configuration;

  public Configuration getConfiguration() {
    return configuration;
  }

  public void setConfiguration(Configuration configuration) {
    this.configuration = configuration;
  }

  public static Configuration getConfigurationInstance() {
    if (configurationFactory == null) {
      configurationFactory = new HBaseConfigurationFactory();
      BeanFactoryRegistrar.aggregate(configurationFactory);
    }
    return initConfiguration();
  }

  private static Configuration initConfiguration() {
    if (configurationFactory.configuration == null) {
      LOGGER.info("Configuration not found in DI!");
      configurationFactory.configuration = HBaseConfiguration.create();
    }
    else {
      LOGGER.info("Configuration found in DI!");
    }
    return configurationFactory.getConfiguration();
  }
}