001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.shiro.event;
020
021import java.util.EventObject;
022
023/**
024 * Root class for all of Shiro's event classes.  Provides access to the timestamp when the event occurred.
025 *
026 * @since 1.3
027 */
028public abstract class Event extends EventObject {
029
030    private final long timestamp; //millis since Epoch (UTC time zone).
031
032    public Event(Object source) {
033        super(source);
034        this.timestamp = System.currentTimeMillis();
035    }
036
037    /**
038     * Returns the timestamp when this event occurred as the number of milliseconds since Epoch (UTC time zone).
039     *
040     * @return the timestamp when this event occurred as the number of milliseconds since Epoch (UTC time zone).
041     */
042    public long getTimestamp() {
043        return this.timestamp;
044    }
045}