| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed 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.commons.jelly.tags.threads; |
| |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.TagSupport; |
| import org.apache.commons.jelly.XMLOutput; |
| |
| /** |
| * Base class for tags that will "use" mutexes. |
| * |
| * @author <a href="mailto:jason@jhorman.org">Jason Horman</a> |
| */ |
| |
| public abstract class UseMutexTag extends TagSupport { |
| /** The mutex to use in some way. */ |
| private Object mutex = null; |
| |
| /** Calls useMutex after checking to make sure that <i>setMutex</i> was called */ |
| public void doTag(XMLOutput output) throws JellyTagException { |
| // either use the set thread or search for a parent thread to use |
| if (mutex == null) { |
| throw new JellyTagException("no mutex set"); |
| } |
| |
| useMutex(mutex, output); |
| } |
| |
| /** Implement this method to do something with the mutex */ |
| protected abstract void useMutex(Object mutex, XMLOutput output) throws JellyTagException; |
| |
| /** Get the mutex */ |
| public Object getMutex() { |
| return mutex; |
| } |
| |
| /** Set the mutex. Any object can be used as a mutex. */ |
| public void setMutex(Object mutex) { |
| this.mutex = mutex; |
| } |
| } |