1 files changed, 72 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMap.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMap.java
new file mode 100644
index 0000000000..3bad73d86d
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMap.java
@@ -0,0 +1,72 @@
+/*
+ *
+ * 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.
+ *
+ */
+package org.apache.qpid.server.ack;
+
+import java.util.Collection;
+import java.util.Set;
+import java.util.Map;
+
+import org.apache.qpid.AMQException;
+import org.apache.qpid.server.queue.QueueEntry;
+
+
+public interface UnacknowledgedMessageMap
+{
+    public interface Visitor
+    {
+        /**
+         * @param deliveryTag
+         *@param message the message being iterated over @return true to stop iteration, false to continue
+         * @throws AMQException
+         */
+        boolean callback(final long deliveryTag, QueueEntry message) throws AMQException;
+
+        void visitComplete();
+    }
+
+    void visit(Visitor visitor) throws AMQException;
+
+    void add(long deliveryTag, QueueEntry message);
+
+    void collect(long deliveryTag, boolean multiple, Map<Long, QueueEntry> msgs);
+
+    void remove(Map<Long,QueueEntry> msgs);
+
+    QueueEntry remove(long deliveryTag);
+
+    Collection<QueueEntry> cancelAllMessages();
+
+    int size();
+
+    void clear();
+
+    QueueEntry get(long deliveryTag);
+
+    /**
+     * Get the set of delivery tags that are outstanding.
+     *
+     * @return a set of delivery tags
+     */
+    Set<Long> getDeliveryTags();
+
+}
+
+