1 files changed, 46 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/flow/FlowCreditManager.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/flow/FlowCreditManager.java
new file mode 100644
index 0000000000..bec51d361d
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/flow/FlowCreditManager.java
@@ -0,0 +1,46 @@
+package org.apache.qpid.server.flow;
+
+import org.apache.qpid.server.message.ServerMessage;
+
+/*
+*
+* 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.
+*
+*/
+public interface FlowCreditManager
+{
+    long getMessageCredit();
+
+    long getBytesCredit();
+
+    public static interface FlowCreditManagerListener
+    {
+        void creditStateChanged(boolean hasCredit);
+    }
+
+    void addStateListener(FlowCreditManagerListener listener);
+
+    boolean removeListener(FlowCreditManagerListener listener);
+
+    public void restoreCredit(long messageCredit, long bytesCredit);
+
+    public boolean hasCredit();
+
+    public boolean useCreditForMessage(ServerMessage msg);
+
+}