From a2970e7c49d8871284bfd2116f2de17b1c938287 Mon Sep 17 00:00:00 2001
From: Derek Hulley <derek.hulley@alfresco.com>
Date: Wed, 16 Sep 2009 18:59:25 +0000
Subject: [PATCH] Added method to check that a read-only or read-write txn is
 present

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@16326 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
---
 .../AlfrescoTransactionSupport.java           | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/source/java/org/alfresco/repo/transaction/AlfrescoTransactionSupport.java b/source/java/org/alfresco/repo/transaction/AlfrescoTransactionSupport.java
index ef275719fa..e97799d5b4 100644
--- a/source/java/org/alfresco/repo/transaction/AlfrescoTransactionSupport.java
+++ b/source/java/org/alfresco/repo/transaction/AlfrescoTransactionSupport.java
@@ -172,6 +172,29 @@ public abstract class AlfrescoTransactionSupport
         }
     }
     
+    /**
+     * Checks the state of the current transaction and throws an exception if a transaction
+     * is not present or if the transaction is not read-write, if required.
+     * 
+     * @param requireReadWrite          <tt>true</tt> if the transaction must be read-write
+     * 
+     * @since 3.2
+     */
+    public static void checkTransactionReadState(boolean requireReadWrite)
+    {
+        if (!TransactionSynchronizationManager.isSynchronizationActive())
+        {
+            throw new IllegalStateException(
+                    "The current operation requires an active " +
+                    (requireReadWrite ? "read-write" : "") +
+                    "transaction.");
+        }
+        if (TransactionSynchronizationManager.isCurrentTransactionReadOnly() && requireReadWrite)
+        {
+            throw new IllegalStateException("The current operation requires an active read-write transaction.");
+        }
+    }
+    
     /**
      * Are there any pending changes which must be synchronized with the store?
      *