Merge DEV to HEAD

ContentDiskDriver rework.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@29451 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/filesys/repo/FilesystemTransactionAdvice.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2005-2010 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco 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 Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.filesys.repo;
+
+import java.io.IOException;
+
+import org.alfresco.error.AlfrescoRuntimeException;
+import org.alfresco.jlan.server.SrvSession;
+import org.alfresco.repo.transaction.RetryingTransactionHelper;
+import org.alfresco.repo.transaction.RetryingTransactionHelper.RetryingTransactionCallback;
+import org.alfresco.service.transaction.TransactionService;
+import org.aopalliance.intercept.MethodInterceptor;
+import org.aopalliance.intercept.MethodInvocation;
+
+/**
+ * An advice wrapper for an AlfrescoDiskDriver.
+ */
+public class FilesystemTransactionAdvice implements MethodInterceptor
+{
+    private boolean readOnly;
+    
+//    private AlfrescoDiskDriver driver;
+    
+    private TransactionService transactionService;
+
+    public FilesystemTransactionAdvice()
+    {
+        readOnly = false;
+    }
+    
+    public void setReadOnly(boolean readOnly)
+    {
+        this.readOnly = readOnly;
+    }
+
+    public Object invoke(final MethodInvocation methodInvocation) throws IOException, Throwable
+    {
+//        Object[] args = methodInvocation.getArguments();
+//        
+//        if(args.length == 0 || !(args[0] instanceof SrvSession))
+//        {
+//            throw new AlfrescoRuntimeException("First argument is not of correct type");
+//        }
+        
+        RetryingTransactionHelper tran = transactionService.getRetryingTransactionHelper();
+        
+        RetryingTransactionCallback<Object> callback = new RetryingTransactionHelper.RetryingTransactionCallback<Object>()
+        {
+            public Object execute() throws Throwable
+            {
+                try
+                {
+                    return methodInvocation.proceed();
+                }
+                catch (IOException e)
+                {
+                    // Ensure original checked IOExceptions get propagated
+                    throw new PropagatingException(e);
+                }
+            }
+        };
+
+        if(readOnly)
+        {
+            // read only transaction
+            try
+            {
+                return tran.doInTransaction(callback, true);
+            }
+            catch(PropagatingException pe)
+            {
+                // Unwrap checked exceptions
+                throw (IOException) pe.getCause();
+            }
+        }
+        else
+        {
+            // read/write only transaction
+            try
+            {
+               return tran.doInTransaction(callback);  
+            }
+            catch(PropagatingException pe)
+            {
+                // Unwrap checked exceptions
+                throw (IOException) pe.getCause();
+            }
+            
+        }
+    }
+
+//    public void setDriver(AlfrescoDiskDriver driver)
+//    {
+//        this.driver = driver;
+//    }
+//
+//    public AlfrescoDiskDriver getDriver()
+//    {
+//        return driver;
+//    }
+
+    public void setTransactionService(TransactionService transactionService)
+    {
+        this.transactionService = transactionService;
+    }
+
+    public TransactionService getTransactionService()
+    {
+        return transactionService;
+    }
+    
+    /**
+     * A wrapper for checked exceptions to be passed through the retrying transaction handler.
+     */
+    protected static class PropagatingException extends RuntimeException
+    {
+        private static final long serialVersionUID = 1L;
+
+        /**
+         * @param cause
+         */
+        public PropagatingException(Throwable cause)
+        {
+            super(cause);
+        }        
+    }
+}