2 * Copyright 2014-present Open Networking Foundation
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package io.atomix.utils.event;
18 import io.atomix.utils.misc.TimestampPrinter;
20 import static com.google.common.base.MoreObjects.toStringHelper;
23 * Base event implementation.
25 public class AbstractEvent<T extends Enum, S> implements Event<T, S> {
26 private final long time;
28 private final S subject;
31 * Creates an event of a given type and for the specified subject and the
34 * @param type event type
35 * @param subject event subject
37 protected AbstractEvent(T type, S subject) {
38 this(type, subject, System.currentTimeMillis());
42 * Creates an event of a given type and for the specified subject and time.
44 * @param type event type
45 * @param subject event subject
46 * @param time occurrence time
48 protected AbstractEvent(T type, S subject, long time) {
50 this.subject = subject;
70 public String toString() {
71 return toStringHelper(this)
72 .add("time", new TimestampPrinter(time))
74 .add("subject", subject())