| /* |
| * 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.directory.shared.ldap.message; |
| |
| |
| import java.util.Observable; |
| import java.util.Observer; |
| |
| import org.apache.directory.shared.ldap.codec.MessageTypeEnum; |
| import org.apache.directory.shared.ldap.message.internal.InternalAbandonableRequest; |
| import org.apache.directory.shared.ldap.message.internal.InternalAbstractRequest; |
| |
| |
| /** |
| * The base abandonable request message class. All such requests have a reponse |
| * type. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class AbstractAbandonableRequest extends InternalAbstractRequest implements InternalAbandonableRequest |
| { |
| static final long serialVersionUID = -4511116249089399040L; |
| |
| /** Flag indicating whether or not this request returns a response. */ |
| private boolean abandoned = false; |
| |
| private RequestObservable o; |
| |
| |
| /** |
| * Subclasses must provide these parameters via a super constructor call. |
| * |
| * @param id |
| * the sequential message identifier |
| * @param type |
| * the request type enum |
| */ |
| protected AbstractAbandonableRequest( final int id, final MessageTypeEnum type ) |
| { |
| super( id, type, true ); |
| } |
| |
| |
| public void abandon() |
| { |
| if ( abandoned ) |
| { |
| return; |
| } |
| |
| abandoned = true; |
| if ( o == null ) |
| { |
| o = new RequestObservable(); |
| } |
| o.setChanged(); |
| o.notifyObservers(); |
| o.deleteObservers(); |
| } |
| |
| |
| public boolean isAbandoned() |
| { |
| return abandoned; |
| } |
| |
| |
| public void addAbandonListener( final AbandonListener listener ) |
| { |
| if ( o == null ) |
| { |
| o = new RequestObservable(); |
| } |
| |
| o.addObserver( new Observer() |
| { |
| public void update( Observable o, Object arg ) |
| { |
| listener.requestAbandoned( AbstractAbandonableRequest.this ); |
| } |
| } ); |
| } |
| |
| |
| // False positive |
| @SuppressWarnings("PMD.UselessOverridingMethod") |
| class RequestObservable extends Observable |
| { |
| @Override |
| public void setChanged() |
| { |
| super.setChanged(); |
| } |
| } |
| } |