1 files changed, 138 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/cluster/ClusterTimer.cpp b/qpid/cpp/src/qpid/cluster/ClusterTimer.cpp
new file mode 100644
index 0000000000..f6e1c7a849
--- /dev/null
+++ b/qpid/cpp/src/qpid/cluster/ClusterTimer.cpp
@@ -0,0 +1,138 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License "); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ *
+ */
+
+#include "Cluster.h"
+#include "ClusterTimer.h"
+#include "qpid/log/Statement.h"
+#include "qpid/framing/ClusterTimerWakeupBody.h"
+#include "qpid/framing/ClusterTimerDropBody.h"
+
+namespace qpid {
+namespace cluster {
+
+using boost::intrusive_ptr;
+using std::max;
+using sys::Timer;
+using sys::TimerTask;
+
+//
+// Note on use of Broker::getTimer() rather than getClusterTime in broker code.
+// The following uses of getTimer() are cluster safe:
+//
+// LinkRegistry: maintenance visits in timer can call Bridge::create/cancel
+// but these don't modify any management state.
+//
+// broker::Connection:
+// - Heartbeats use ClusterOrderOutput to ensure consistency
+// - timeout: aborts connection in timer, cluster does an orderly connection close.
+//
+// SessionState: scheduledCredit - uses ClusterOrderProxy
+// Broker::queueCleaner: cluster implements ExpiryPolicy for consistent expiry.
+//
+// Broker::dtxManager:  dtx disabled with cluster.
+//
+// requestIOProcessing: called in doOutput.
+//
+
+
+ClusterTimer::ClusterTimer(Cluster& c) : cluster(c) {
+    // Allow more generous overrun threshold with cluster as we
+    // have to do a CPG round trip before executing the task.
+    overran = 10*sys::TIME_MSEC;
+    late = 100*sys::TIME_MSEC;
+}
+
+ClusterTimer::~ClusterTimer() {}
+
+// Initialization or deliver thread.
+void ClusterTimer::add(intrusive_ptr<TimerTask> task)
+{
+    QPID_LOG(trace, "Adding cluster timer task " << task->getName());
+    Map::iterator i = map.find(task->getName());
+    if (i != map.end())
+        throw Exception(QPID_MSG("Task already exists with name " << task->getName()));
+    map[task->getName()] = task;
+    // Only the elder actually activates the task with the Timer base class.
+    if (cluster.isElder()) {
+        QPID_LOG(trace, "Elder activating cluster timer task " << task->getName());
+        Timer::add(task);
+    }
+}
+
+// Timer thread
+void ClusterTimer::fire(intrusive_ptr<TimerTask> t) {
+    // Elder mcasts wakeup on fire, task is not fired until deliverWakeup
+    if (cluster.isElder()) {
+        QPID_LOG(trace, "Sending cluster timer wakeup " << t->getName());
+        cluster.getMulticast().mcastControl(
+            framing::ClusterTimerWakeupBody(framing::ProtocolVersion(), t->getName()),
+            cluster.getId());
+    }
+    else
+        QPID_LOG(trace, "Cluster timer task fired, but not elder " << t->getName());
+}
+
+// Timer thread
+void ClusterTimer::drop(intrusive_ptr<TimerTask> t) {
+    // Elder mcasts drop, task is droped in deliverDrop
+    if (cluster.isElder()) {
+        QPID_LOG(trace, "Sending cluster timer drop " << t->getName());
+        cluster.getMulticast().mcastControl(
+            framing::ClusterTimerDropBody(framing::ProtocolVersion(), t->getName()),
+            cluster.getId());
+    }
+    else
+        QPID_LOG(trace, "Cluster timer task dropped, but not on elder " << t->getName());
+}
+
+// Deliver thread
+void ClusterTimer::deliverWakeup(const std::string& name) {
+    QPID_LOG(trace, "Cluster timer wakeup delivered for " << name);
+    Map::iterator i = map.find(name);
+    if (i == map.end())
+        throw Exception(QPID_MSG("Cluster timer wakeup non-existent task " << name));
+    else {
+        intrusive_ptr<TimerTask> t = i->second;
+        map.erase(i);
+        Timer::fire(t);
+    }
+}
+
+// Deliver thread
+void ClusterTimer::deliverDrop(const std::string& name) {
+    QPID_LOG(trace, "Cluster timer drop delivered for " << name);
+    Map::iterator i = map.find(name);
+    if (i == map.end())
+        throw Exception(QPID_MSG("Cluster timer drop non-existent task " << name));
+    else {
+        intrusive_ptr<TimerTask> t = i->second;
+        map.erase(i);
+    }
+}
+
+// Deliver thread
+void ClusterTimer::becomeElder() {
+    for (Map::iterator i = map.begin(); i != map.end(); ++i) {
+        Timer::add(i->second);
+    }
+}
+
+}}