This checks in the current state of WCM development.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3128 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/OrphanReaper.java

@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2006 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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.alfresco.repo.avm;
+
+/**
+ * This is the background thread for reaping no longer referenced nodes
+ * in the AVM repository.  These orphans arise from purge operations.
+ * @author britt
+ */
+class OrphanReaper implements Runnable
+{
+    /**
+     * Inactive base sleep interval.
+     */
+    private long fInactiveBaseSleep;
+    
+    /**
+     * Active base sleep interval.
+     */
+    private long fActiveBaseSleep;
+    
+    /**
+     * Batch size.
+     */
+    private int fBatchSize;
+    
+    /**
+     * Flag for shutting down this.
+     */
+    private boolean fDone;
+    
+    /**
+     * The thread for this.
+     */
+    private Thread fThread;
+    
+    /**
+     * Create one with default parameters.
+     */
+    public OrphanReaper()
+    {
+        fInactiveBaseSleep = 30000;
+        fActiveBaseSleep = 2000;
+        fBatchSize = 50;
+        fDone = false;
+    }
+    
+    // Setters for configuration.
+    
+    /**
+     * Set the Inactive Base Sleep interval.
+     * @param interval The interval to set in ms.
+     */
+    public void setInactiveBaseSleep(long interval)
+    {
+        fInactiveBaseSleep = interval;
+    }
+    
+    /**
+     * Set the active base sleep interval.
+     * @param interval The interval to set in ms.
+     */
+    public void setActiveBaseSleep(long interval)
+    {
+        fActiveBaseSleep = interval;
+    }
+    
+    /**
+     * Set the batch size.
+     * @param size The batch size to set.
+     */
+    public void setBatchSize(int size)
+    {
+        fBatchSize = size;
+    }
+    
+    /**
+     * Start things up after configuration is complete.
+     */
+    public void init()
+    {
+        fThread = new Thread(this);
+        fThread.start();
+    }
+
+    /**
+     * Shutdown the reaper. This needs to be called when 
+     * the application shuts down.
+     */
+    public void shutDown()
+    {
+        fDone = true;
+        try
+        {
+            fThread.join();
+        }
+        catch (InterruptedException ie)
+        {
+            // Do nothing.
+        }
+    }
+    
+    /**
+     * Sit in a loop, periodically querying for orphans.  When orphans
+     * are found, unhook them in bite sized batches.
+     */
+    public void run()
+    {
+    }
+}