1 files changed, 60 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/MessageAllocator.cpp b/qpid/cpp/src/qpid/broker/MessageAllocator.cpp
new file mode 100644
index 0000000000..62d5402b0a
--- /dev/null
+++ b/qpid/cpp/src/qpid/broker/MessageAllocator.cpp
@@ -0,0 +1,60 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+/* Used by queues to allocate the next "most desirable" message to a consuming client */
+
+#include "qpid/broker/Queue.h"
+#include "qpid/broker/MessageAllocator.h"
+
+using namespace qpid::broker;
+
+bool MessageAllocator::nextConsumableMessage( Consumer::shared_ptr&, QueuedMessage& next,
+                                              const sys::Mutex::ScopedLock&)
+{
+    Messages& messages(queue->getMessages());
+    if (!messages.empty()) {
+        next = messages.front();    // by default, consume oldest msg
+        return true;
+    }
+    return false;
+}
+
+bool MessageAllocator::nextBrowsableMessage( Consumer::shared_ptr& c, QueuedMessage& next,
+                                             const sys::Mutex::ScopedLock&)
+{
+    Messages& messages(queue->getMessages());
+    if (!messages.empty() && messages.next(c->position, next))
+        return true;
+    return false;
+}
+
+
+bool MessageAllocator::acquirable( const std::string&,
+                                   const QueuedMessage&,
+                                   const sys::Mutex::ScopedLock&)
+{
+    return true;
+}
+
+void MessageAllocator::query(qpid::types::Variant::Map&, const sys::Mutex::ScopedLock&) const
+{
+}
+