| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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.cloud.api; |
| |
| import javax.servlet.annotation.WebListener; |
| import javax.servlet.http.HttpSession; |
| import javax.servlet.http.HttpSessionEvent; |
| import javax.servlet.http.HttpSessionListener; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.LogManager; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| @WebListener |
| public class ApiSessionListener implements HttpSessionListener { |
| protected Logger logger = LogManager.getLogger(getClass()); |
| private static Map<String, HttpSession> sessions = new ConcurrentHashMap<>(); |
| |
| /** |
| * @return the internal administered session count |
| */ |
| public static long getSessionCount() { |
| return sessions.size(); |
| } |
| |
| /** |
| * @return the size of the internal {@see Map} of sessions |
| */ |
| public static long getNumberOfSessions() { |
| return sessions.size(); |
| } |
| |
| public void sessionCreated(HttpSessionEvent event) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("Session created by Id : " + event.getSession().getId() + " , session: " + event.getSession().toString() + " , source: " + event.getSource().toString() + " , event: " + event.toString()); |
| } |
| synchronized (this) { |
| HttpSession session = event.getSession(); |
| sessions.put(session.getId(), event.getSession()); |
| } |
| if (logger.isTraceEnabled()) { |
| logger.trace("Sessions count: " + getSessionCount()); |
| } |
| } |
| |
| public void sessionDestroyed(HttpSessionEvent event) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("Session destroyed by Id : " + event.getSession().getId() + " , session: " + event.getSession().toString() + " , source: " + event.getSource().toString() + " , event: " + event.toString()); |
| } |
| synchronized (this) { |
| sessions.remove(event.getSession().getId()); |
| } |
| if (logger.isTraceEnabled()) { |
| logger.trace("Sessions count: " + getSessionCount()); |
| } |
| } |
| } |