Add debug logging to see what the next message the Subscription is going to look at.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@820319 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 9 insertions, 1 deletions

diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/subscription/SubscriptionImpl.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/subscription/SubscriptionImpl.java
index 72d6afc65c..2893e916cc 100644
--- a/qpid/java/broker/src/main/java/org/apache/qpid/server/subscription/SubscriptionImpl.java
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/subscription/SubscriptionImpl.java
@@ -630,11 +630,19 @@ public abstract class SubscriptionImpl implements Subscription, FlowCreditManage
 
     public QueueEntry getLastSeenEntry()
     {
-        return _queueContext.get();
+        QueueEntry entry = _queueContext.get();
+
+        if(_logger.isDebugEnabled())
+        {
+            _logger.debug(_logActor + ": lastSeenEntry: " + (entry == null ? "null" : entry.debugIdentity()));
+        }        
+
+        return entry;
     }
 
     public boolean setLastSeenEntry(QueueEntry expected, QueueEntry newvalue)
     {
+        _logger.debug(debugIdentity() + " Setting Last Seen To:" + (newvalue == null ? "nullNV" : newvalue.debugIdentity()));
         return _queueContext.compareAndSet(expected,newvalue);
     }