Import Floodlight v0.90
diff --git a/src/ext/floodlight/src/main/java/net/floodlightcontroller/core/IListener.java b/src/ext/floodlight/src/main/java/net/floodlightcontroller/core/IListener.java
new file mode 100644
index 0000000..1bd6560
--- /dev/null
+++ b/src/ext/floodlight/src/main/java/net/floodlightcontroller/core/IListener.java
@@ -0,0 +1,52 @@
+/**
+* Copyright 2011, Big Switch Networks, Inc.
+* Originally created by David Erickson, Stanford University
+*
+* 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 net.floodlightcontroller.core;
+
+public interface IListener<T> {
+ public enum Command {
+ CONTINUE, STOP
+ }
+
+ /**
+ * The name assigned to this listener
+ * @return
+ */
+ public String getName();
+
+ /**
+ * Check if the module called name is a callback ordering prerequisite
+ * for this module. In other words, if this function returns true for
+ * the given name, then this message listener will be called after that
+ * message listener.
+ * @param type the message type to which this applies
+ * @param name the name of the module
+ * @return whether name is a prerequisite.
+ */
+ public boolean isCallbackOrderingPrereq(T type, String name);
+
+ /**
+ * Check if the module called name is a callback ordering post-requisite
+ * for this module. In other words, if this function returns true for
+ * the given name, then this message listener will be called before that
+ * message listener.
+ * @param type the message type to which this applies
+ * @param name the name of the module
+ * @return whether name is a post-requisite.
+ */
+ public boolean isCallbackOrderingPostreq(T type, String name);
+}