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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.dubbo.event;
import java.util.EventObject;
/**
* An event object of Dubbo is based on the Java standard {@link EventObject event}
*
* @since 2.7.5
*/
public abstract class Event extends EventObject {
private static final long serialVersionUID = -1704315605423947137L;
/**
* The timestamp of event occurs
*/
private final long timestamp;
/**
* Constructs a prototypical Event.
*
* @param source The object on which the Event initially occurred.
* @throws IllegalArgumentException if source is null.
*/
public Event(Object source) {
super(source);
this.timestamp = System.currentTimeMillis();
}
public long getTimestamp() {
return timestamp;
}
}