| /* |
| * 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.util; |
| |
| /** |
| * A time limited permit granting access to a target object. |
| * A <code>TimedPermit</code> is issued for a target object by a <code>TimedPermitIssue</code>. |
| * When the time limit (determined by the issuer) is reached, any listeners attached to |
| * the issuer are notified. |
| * |
| * @author irvingd |
| * |
| */ |
| public interface TimedPermit { |
| |
| /** |
| * Extends the lifetime of this permit. |
| * This is typically used as a "keep-alive" mechanism. For example, if a permit is |
| * issued to manage the idle expiry time of an http session, the permit might be |
| * extended each time the client issues a request associated with the session.<br/> |
| * The amount of time added to the lifetime of this permit by invoking this method |
| * is determined by the <code>TimedPermitIssuer</code> which issued this permit. |
| * |
| * Invoking this method has no effect if this permit is already expired |
| */ |
| public void renew(); |
| |
| /** |
| * Cancels this permit. After invoking this method, it is guaranteed that |
| * no expiry notification will be made for the target object by this permits |
| * associated <code>TimedPermitIssuer</code>. |
| * |
| * @return <code>true</code> if invoking this method prevented expiry notification |
| * from taking place, <code>false</code> if expiry notification has already |
| * taken place |
| */ |
| public boolean cancel(); |
| |
| } |