[jboss-cvs] JBossAS SVN: r78674 - projects/aop/trunk/aop/src/main/org/jboss/aop/util.

[jboss-cvs-commits at lists.jboss.org]

Author: kabir.khan at jboss.com
Date: 2008-09-18 11:11:09 -0400 (Thu, 18 Sep 2008)
New Revision: 78674

Added:
   projects/aop/trunk/aop/src/main/org/jboss/aop/util/AOPLock.java
Log:
Add wrapper around ReentrantReadWriteLock

Added: projects/aop/trunk/aop/src/main/org/jboss/aop/util/AOPLock.java
===================================================================
--- projects/aop/trunk/aop/src/main/org/jboss/aop/util/AOPLock.java	                        (rev 0)
+++ projects/aop/trunk/aop/src/main/org/jboss/aop/util/AOPLock.java	2008-09-18 15:11:09 UTC (rev 78674)
@@ -0,0 +1,131 @@
+/*
+* JBoss, Home of Professional Open Source.
+* Copyright 2006, Red Hat Middleware LLC, and individual contributors
+* as indicated by the @author tags. See the copyright.txt file in the
+* distribution for a full listing of individual contributors. 
+*
+* This is free software; you can redistribute it and/or modify it
+* under the terms of the GNU Lesser General Public License as
+* published by the Free Software Foundation; either version 2.1 of
+* the License, or (at your option) any later version.
+*
+* This software is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this software; if not, write to the Free
+* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+*/ 
+package org.jboss.aop.util;
+
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+/**
+ * 
+ * @author <a href="kabir.khan at jboss.com">Kabir Khan</a>
+ * @version $Revision: 1.1 $
+ */
+public class AOPLock
+{
+   private ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
+   AOPLock parent;
+   
+   public AOPLock()
+   {
+      
+   }
+   
+   public AOPLock(AOPLock parent)
+   {
+      this.parent = parent;
+   }
+   
+   /**
+    * Read-lock just this level
+    */
+   public final void lockRead()
+   {
+      lock.readLock().lock();
+   }
+
+   /**
+    * Read-unlock just this level
+    */
+   protected final void unlockRead()
+   {
+      lock.readLock().unlock();
+   }
+   
+   /**
+    * Write-lock just this level
+    */
+   public final void lockWrite()
+   {
+      lock.writeLock().lock();
+   }
+   
+   /**
+    * Write-unlock this level
+    */
+   public final void unlockWrite()
+   {
+      lock.writeLock().unlock();
+   }
+
+   /**
+    * Read-lock this level
+    * @param if true, parent levels will be locked too
+    */
+   public void lockRead(boolean lockParents)
+   {
+      if (lockParents && parent != null)
+      {
+         parent.lockRead(lockParents);
+      }
+      lockRead();
+   }
+   
+   /**
+    * Read-unlock this level
+    * @param if true, parent levels will be unlocked too
+    */
+   public void unlockRead(boolean lockParents)
+   {
+      unlockRead();
+      if (lockParents && parent != null)
+      {
+         parent.unlockRead(lockParents);
+      }
+   }
+   
+   /**
+    * Write-lock this level
+    * @param if true, parent levels will be locked too
+    */
+   public void lockWrite(boolean lockParents)
+   {
+      if (lockParents && parent != null)
+      {
+         parent.lockWrite(lockParents);
+      }
+      lockWrite();
+   }
+   
+   /**
+    * Write-unlock this level
+    * @param if true, parent levels will be unlocked too
+    */
+   public void unlockWrite(boolean lockParents)
+   {
+      unlockWrite();
+      if (lockParents && parent != null)
+      {
+         parent.unlockWrite(lockParents);
+      }
+   }
+
+
+}