1 files changed, 69 insertions, 0 deletions
diff --git a/Final/cpp/lib/broker/QueuePolicy.cpp b/Final/cpp/lib/broker/QueuePolicy.cpp
new file mode 100644
index 0000000000..e13fd62fc6
--- /dev/null
+++ b/Final/cpp/lib/broker/QueuePolicy.cpp
@@ -0,0 +1,69 @@
+/*
+ *
+ * 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 <QueuePolicy.h>
+
+using namespace qpid::broker;
+using namespace qpid::framing;
+
+QueuePolicy::QueuePolicy(u_int32_t _maxCount, u_int64_t _maxSize) : 
+    maxCount(_maxCount), maxSize(_maxSize), count(0), size(0) {}
+
+QueuePolicy::QueuePolicy(const FieldTable& settings) :
+    maxCount(getInt(settings, maxCountKey, 0)), 
+    maxSize(getInt(settings, maxSizeKey, 0)), count(0), size(0) {}
+
+void QueuePolicy::enqueued(u_int64_t _size)
+{
+    if (maxCount) count++;
+    if (maxSize) size += _size;
+}
+
+void QueuePolicy::dequeued(u_int64_t _size)
+{
+    if (maxCount) count--;
+    if (maxSize) size -= _size;
+}
+
+bool QueuePolicy::limitExceeded()
+{
+    return (maxSize && size > maxSize) || (maxCount && count > maxCount);
+}
+
+void QueuePolicy::update(FieldTable& settings)
+{
+    if (maxCount) settings.setInt(maxCountKey, maxCount);
+    if (maxSize) settings.setInt(maxSizeKey, maxSize);    
+}
+
+
+int QueuePolicy::getInt(const FieldTable& settings, const std::string& key, int defaultValue)
+{
+    //Note: currently field table only contain signed 32 bit ints, which
+    //      restricts the values that can be set on the queue policy.
+    try {
+        return settings.getInt(key); 
+    } catch (FieldNotFoundException& ignore) {
+        return defaultValue;
+    }
+}
+
+const std::string QueuePolicy::maxCountKey("qpid.max_count");
+const std::string QueuePolicy::maxSizeKey("qpid.max_size");