| /* |
| * 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 org.apache.asyncweb.server.session; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.asyncweb.server.HttpSession; |
| import org.apache.asyncweb.server.util.TimedPermit; |
| |
| /** |
| * A basic <code>Session</code> implementation which holds session values |
| * in memory |
| * |
| * @author irvingd |
| * |
| */ |
| class BasicSession implements HttpSession |
| { |
| |
| private TimedPermit permit; |
| |
| private boolean isAttached; |
| |
| private boolean isDestroyed; |
| |
| private Object lock = new Object(); |
| |
| private BasicSessionStore owner; |
| |
| private String id; |
| |
| private Map<String, Object> values = Collections |
| .synchronizedMap(new HashMap<String, Object>()); |
| |
| /** |
| * @param owner The owner of this session |
| */ |
| BasicSession(String id, BasicSessionStore owner) { |
| this.owner = owner; |
| this.id = id; |
| } |
| |
| public Object getValue(String key) { |
| return values.get(key); |
| } |
| |
| public void setValue(String key, Object value) { |
| values.put(key, value); |
| } |
| |
| public Object removeValue(String key) { |
| return values.remove(key); |
| } |
| |
| public boolean isAttached() { |
| return isAttached; |
| } |
| |
| public boolean isValid() { |
| synchronized (lock) { |
| return !isDestroyed; |
| } |
| } |
| |
| /** |
| * Destroys this session if it is not already destroyed. |
| * If destruction takes place, notifications are fired. |
| */ |
| public void destroy() { |
| if (destroyIfActive()) { |
| owner.sessionDestroyed(this); |
| } |
| } |
| |
| /** |
| * @return The id of this session |
| */ |
| public String getId() { |
| return id; |
| } |
| |
| /** |
| * Instructs this session to expire. |
| * If this session is not already expired, expiration notifications |
| * are fired |
| */ |
| void expire() { |
| if (destroyIfActive()) { |
| owner.sessionExpired(this); |
| } |
| } |
| |
| /** |
| * Sets the permit associated with this session |
| * |
| * @param permit This sessions access permit |
| */ |
| void setPermit(TimedPermit permit) { |
| this.permit = permit; |
| } |
| |
| /** |
| * Invoked when this session is referenced by a client request. |
| * The permit associated with this session is renewed, and subsequent calls |
| * to <code>isAttached</code> will return <code>true</code> |
| */ |
| void access() { |
| permit.renew(); |
| isAttached = true; |
| } |
| |
| /** |
| * Destroys this session if it is not destroyed already. |
| * |
| * @return <code>true</code> if this session is successfully |
| */ |
| private boolean destroyIfActive() { |
| synchronized (lock) { |
| if (isDestroyed) { |
| return false; |
| } |
| isDestroyed = true; |
| } |
| permit.cancel(); |
| return true; |
| } |
| |
| } |