1 files changed, 98 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/QueueListeners.cpp b/qpid/cpp/src/qpid/broker/QueueListeners.cpp
new file mode 100644
index 0000000000..591f4443bb
--- /dev/null
+++ b/qpid/cpp/src/qpid/broker/QueueListeners.cpp
@@ -0,0 +1,98 @@
+/*
+ *
+ * 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 "qpid/broker/QueueListeners.h"
+#include <boost/bind.hpp>
+
+namespace qpid {
+namespace broker {
+
+void QueueListeners::addListener(Consumer::shared_ptr c)
+{
+    if (!c->inListeners) {
+        if (c->acquires) {
+            add(consumers, c);
+        } else {
+            add(browsers, c);
+        }
+        c->inListeners = true;
+    }
+}
+
+void QueueListeners::removeListener(Consumer::shared_ptr c)
+{
+    if (c->inListeners) {
+        if (c->acquires) {
+            remove(consumers, c);
+        } else {
+            remove(browsers, c);
+        }
+        c->inListeners = false;
+    }
+}
+
+void QueueListeners::populate(NotificationSet& set)
+{
+    if (consumers.size()) {
+        set.consumer = consumers.front();
+        consumers.pop_front();
+        set.consumer->inListeners = false;
+    } else {
+        // Don't swap the deques, hang on to the memory allocated.
+        set.browsers = browsers;
+        browsers.clear();
+        for (Listeners::iterator i = set.browsers.begin(); i != set.browsers.end(); i++)
+            (*i)->inListeners = false;
+    }
+}
+
+void QueueListeners::add(Listeners& listeners, Consumer::shared_ptr c)
+{
+    listeners.push_back(c);
+}
+
+void QueueListeners::remove(Listeners& listeners, Consumer::shared_ptr c)
+{
+    Listeners::iterator i = std::find(listeners.begin(), listeners.end(), c);
+    if (i != listeners.end()) listeners.erase(i);
+}
+
+void QueueListeners::NotificationSet::notify()
+{
+    if (consumer) consumer->notify();
+    else std::for_each(browsers.begin(), browsers.end(), boost::mem_fn(&Consumer::notify));
+}
+
+bool QueueListeners::contains(Consumer::shared_ptr c) const {
+    return c->inListeners;
+}
+
+void QueueListeners::ListenerSet::notifyAll()
+{
+    std::for_each(listeners.begin(), listeners.end(), boost::mem_fn(&Consumer::notify));
+}
+
+void QueueListeners::snapshot(ListenerSet& set)
+{
+    set.listeners.insert(set.listeners.end(), consumers.begin(), consumers.end());
+    set.listeners.insert(set.listeners.end(), browsers.begin(), browsers.end());
+}
+
+}} // namespace qpid::broker