1 files changed, 78 insertions, 0 deletions
diff --git a/framework/src/onos/core/api/src/main/java/org/onosproject/event/AbstractEvent.java b/framework/src/onos/core/api/src/main/java/org/onosproject/event/AbstractEvent.java
new file mode 100644
index 00000000..67b10292
--- /dev/null
+++ b/framework/src/onos/core/api/src/main/java/org/onosproject/event/AbstractEvent.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2014-2015 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.event;
+
+import org.joda.time.LocalDateTime;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Base event implementation.
+ */
+public class AbstractEvent<T extends Enum, S> implements Event<T, S> {
+
+    private final long time;
+    private final T type;
+    private final S subject;
+
+    /**
+     * Creates an event of a given type and for the specified subject and the
+     * current time.
+     *
+     * @param type    event type
+     * @param subject event subject
+     */
+    protected AbstractEvent(T type, S subject) {
+        this(type, subject, System.currentTimeMillis());
+    }
+
+    /**
+     * Creates an event of a given type and for the specified subject and time.
+     *
+     * @param type    event type
+     * @param subject event subject
+     * @param time    occurrence time
+     */
+    protected AbstractEvent(T type, S subject, long time) {
+        this.type = type;
+        this.subject = subject;
+        this.time = time;
+    }
+
+    @Override
+    public long time() {
+        return time;
+    }
+
+    @Override
+    public T type() {
+        return type;
+    }
+
+    @Override
+    public S subject() {
+        return subject;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("time", new LocalDateTime(time))
+                .add("type", type())
+                .add("subject", subject())
+                .toString();
+    }
+}