1 files changed, 27 insertions, 0 deletions
diff --git a/java/broker/src/main/java/org/apache/qpid/server/state/StateListener.java b/java/broker/src/main/java/org/apache/qpid/server/state/StateListener.java
new file mode 100644
index 0000000000..d31e786ef1
--- /dev/null
+++ b/java/broker/src/main/java/org/apache/qpid/server/state/StateListener.java
@@ -0,0 +1,27 @@
+/*
+ *
+ * Copyright (c) 2006 The Apache Software Foundation
+ *
+ * Licensed 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.state;
+
+import org.apache.qpid.AMQException;
+
+public interface StateListener
+{
+    void stateChanged(AMQState oldState, AMQState newState) throws AMQException;
+
+    void error(Throwable t);
+}