[Openutils-svn] SF.net SVN: openutils:[3809] magnoliamodules/branches/magnolia44/ openutils-mgnlmedia/src/main/java/net/sourceforge/openutils/mgnlmedia/media /utils/LockUtils.java

[<die...@us...>]

Revision: 3809
          http://openutils.svn.sourceforge.net/openutils/?rev=3809&view=rev
Author:   diego_schivo
Date:     2012-03-16 10:58:18 +0000 (Fri, 16 Mar 2012)
Log Message:
-----------
MEDIA-279 LockUtils

Added Paths:
-----------
    magnoliamodules/branches/magnolia44/openutils-mgnlmedia/src/main/java/net/sourceforge/openutils/mgnlmedia/media/utils/LockUtils.java

Added: magnoliamodules/branches/magnolia44/openutils-mgnlmedia/src/main/java/net/sourceforge/openutils/mgnlmedia/media/utils/LockUtils.java
===================================================================
--- magnoliamodules/branches/magnolia44/openutils-mgnlmedia/src/main/java/net/sourceforge/openutils/mgnlmedia/media/utils/LockUtils.java	                        (rev 0)
+++ magnoliamodules/branches/magnolia44/openutils-mgnlmedia/src/main/java/net/sourceforge/openutils/mgnlmedia/media/utils/LockUtils.java	2012-03-16 10:58:18 UTC (rev 3809)
@@ -0,0 +1,74 @@
+/**
+ *
+ * SimpleMedia Module for Magnolia CMS (http://www.openmindlab.com/lab/products/media.html)
+ * Copyright(C) 2008-2012, Openmind S.r.l. http://www.openmindonline.it
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.sourceforge.openutils.mgnlmedia.media.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * @author molaschi
+ * @version $Id: LockUtils.java 7734 2012-01-25 22:02:24Z manuel $
+ */
+public class LockUtils
+{
+
+    private Logger log = LoggerFactory.getLogger(LockUtils.class);
+
+    private Object synchObject = new Object();
+
+    private List<Object> locks = null;
+
+    private int actualLock = 0;
+
+    public LockUtils(int maxThreads)
+    {
+        locks = new ArrayList<Object>(maxThreads);
+        for (int t = 0; t < maxThreads; t++)
+        {
+            locks.add(new Object());
+        }
+    }
+
+    public Object nextLock()
+    {
+        synchronized (synchObject)
+        {
+            if (locks != null && locks.size() > 0)
+            {
+                Object ret = locks.get(actualLock);
+                if (log.isDebugEnabled())
+                {
+                    log.debug("Returning lock n. {}, id {}", actualLock, ret.toString());
+                }
+                actualLock++;
+                if (actualLock >= locks.size())
+                {
+                    actualLock = 0;
+                }
+                return ret;
+            }
+            return new Object();
+        }
+    }
+}

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