From ef9268528d3147173dfb0d2ef707ee3e4fc4f210 Mon Sep 17 00:00:00 2001
From: Alan Conway <aconway@apache.org>
Date: Fri, 12 Mar 2010 20:11:31 +0000
Subject: New cluster member pushes store when joining an active cluster.

Previously a broker with a clean store would not be able to join an
active cluster because the shtudown-id did not match. This commit
ensures that when a broker joins an active cluster, it always pushes
its store regardless of status. Clean/dirty status is only compared
when forming an initial cluster.

This change required splitting initialization into two phases:

PRE_INIT: occurs in the Cluster ctor during early-initialize. This
phase determines whether or not to push the store.

INIT: occurs after Cluster::initialize and does the remaining
initialization chores.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@922412 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/src/qpid/cluster/PollableQueue.h | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'cpp/src/qpid/cluster/PollableQueue.h')

diff --git a/cpp/src/qpid/cluster/PollableQueue.h b/cpp/src/qpid/cluster/PollableQueue.h
index 2aed6de5b9..59d0bcd36a 100644
--- a/cpp/src/qpid/cluster/PollableQueue.h
+++ b/cpp/src/qpid/cluster/PollableQueue.h
@@ -31,6 +31,13 @@ namespace cluster {
 /**
  * More convenient version of PollableQueue that handles iterating
  * over the batch and error handling.
+ *
+ * Constructed in "bypass" mode where items are processed directly
+ * rather than put on the queue. This is important for the
+ * PRE_INIT stage when Cluster is pumping CPG dispatch directly
+ * before the poller has started.
+ *
+ * Calling start() starts the pollable queue and disabled bypass mode.
  */
 template <class T> class PollableQueue : public sys::PollableQueue<T> {
   public:
@@ -41,7 +48,7 @@ template <class T> class PollableQueue : public sys::PollableQueue<T> {
                   const boost::shared_ptr<sys::Poller>& poller)
         : sys::PollableQueue<T>(boost::bind(&PollableQueue<T>::handleBatch, this, _1),
                                 poller),
-          callback(f), error(err), message(msg)
+          callback(f), error(err), message(msg), bypass(true)
     {}
 
     typename sys::PollableQueue<T>::Batch::const_iterator
@@ -62,10 +69,21 @@ template <class T> class PollableQueue : public sys::PollableQueue<T> {
         }
     }
 
+    void push(const T& t) {
+        if (bypass) callback(t);
+        else sys::PollableQueue<T>::push(t);
+    }
+
+    void start() {
+        bypass = false;
+        sys::PollableQueue<T>::start();
+    }
+
   private:
     Callback callback;
     ErrorCallback error;
     std::string message;
+    bool bypass;
 };
 
     
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