/*
 * ============LICENSE_START==========================================
 * ONAP Portal SDK
 * ===================================================================
 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * ===================================================================
 *
 * Unless otherwise specified, all software contained herein is licensed
 * under the Apache License, Version 2.0 (the "License");
 * you may not use this software 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.
 *
 * Unless otherwise specified, all documentation contained herein is licensed
 * under the Creative Commons License, Attribution 4.0 Intl. (the "License");
 * you may not use this documentation except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *             https://creativecommons.org/licenses/by/4.0/
 *
 * Unless required by applicable law or agreed to in writing, documentation
 * 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============================================
 *
 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 */
package org.onap.portalsdk.core.listener;

import javax.servlet.annotation.WebListener;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import org.onap.portalsdk.core.logging.format.AlarmSeverityEnum;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;

@WebListener
public class UserSessionListener implements HttpSessionListener {

	private static final EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(UserSessionListener.class);

	@Override
	public void sessionCreated(HttpSessionEvent event) {
		logger.trace(EELFLoggerDelegate.debugLogger, "sessionCreated");
	}

	/**
	 * Removes sessions from the context scoped HashMap when they expire or are
	 * invalidated.
	 */
	public void sessionDestroyed(HttpSessionEvent event) {
		try {
			HttpSession session = event.getSession();
			session.removeAttribute(CollaborateListBindingListener.SESSION_ATTR_NAME);
		} catch (Exception e) {
			logger.error(EELFLoggerDelegate.errorLogger, "sessionDestroyed" + e.getMessage(), AlarmSeverityEnum.MINOR);
		}
	}
}