1 files changed, 74 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbEvent.java b/framework/src/onos/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbEvent.java
new file mode 100644
index 00000000..f68b3c8a
--- /dev/null
+++ b/framework/src/onos/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbEvent.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.onosproject.ovsdb.controller;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * The abstract event of ovsdb.
+ */
+public final class OvsdbEvent<S> {
+
+    public enum Type {
+        /**
+         * Signifies that a new ovs port update has been detected.
+         */
+        PORT_ADDED,
+        /**
+         * Signifies that a ovs port has been removed.
+         */
+        PORT_REMOVED
+    }
+
+    private final Type type;
+    private final S subject;
+
+    /**
+     * Creates an event of a given type and for the specified event subject.
+     *
+     * @param type event type
+     * @param subject event subject
+     */
+    public OvsdbEvent(Type type, S subject) {
+        this.type = type;
+        this.subject = subject;
+    }
+
+    /**
+     * Returns the type of event.
+     *
+     * @return event type
+     */
+    public Type type() {
+        return type;
+    }
+
+    /**
+     * Returns the subject of event.
+     *
+     * @return subject to which this event pertains
+     */
+    public S subject() {
+        return subject;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this).add("type", type())
+                .add("subject", subject()).toString();
+    }
+
+}