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/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.aai.util;

import java.io.IOException;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.openecomp.aai.dbmap.AAIGraph;
import org.openecomp.aai.exceptions.AAIException;
import org.openecomp.aai.introspection.ModelInjestor;
import org.openecomp.aai.logging.ErrorLogHelper;
import org.openecomp.aai.migration.MigrationControllerInternal;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;

public class AAIAppServletContextListener implements ServletContextListener {

	private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(AAIAppServletContextListener.class.getName());	
	
	/**
	 * Destroys Context
	 * 
	 * @param arg0 the ServletContextEvent
	 */
	public void contextDestroyed(ServletContextEvent arg0) {		
		LOGGER.info("AAIGraph shutting down");
		AAIGraph.getInstance().graphShutdown();
		LOGGER.info("AAIGraph shutdown");
	}

	/**
	 * Initializes Context
	 * 
	 * @param arg0 the ServletContextEvent
	 */
	public void contextInitialized(ServletContextEvent arg0) {
		System.setProperty("org.openecomp.aai.serverStarted", "false");
		LOGGER.info("***AAI Server initialization started...");

		try {
			LOGGER.info("Loading aaiconfig.properties");
			AAIConfig.init();

			LOGGER.info("Loading error.properties");
			ErrorLogHelper.loadProperties();

			LOGGER.info("Loading graph database");

			AAIGraph.getInstance();
			ModelInjestor.getInstance();

			LOGGER.info("A&AI Server initialization succcessful.");
			System.setProperty("org.openecomp.aai.serverStarted", "true");
			if ("true".equals(AAIConfig.get("aai.run.migrations", "false"))) {
				MigrationControllerInternal migrations = new MigrationControllerInternal();
				migrations.run(new String[]{"--commit"});
			}
		} catch (AAIException e) {
			ErrorLogHelper.logException(e);
			throw new RuntimeException("AAIException caught while initializing A&AI server", e);
		} catch (IOException e) {
			ErrorLogHelper.logError("AAI_4000", e.getMessage());
			throw new RuntimeException("IOException caught while initializing A&AI server", e);
		} catch (Exception e) {
			LOGGER.error("Unknown failure while initializing A&AI Server", e);
			throw new RuntimeException("Unknown failure while initializing A&AI server", e);
		}
	}
}