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    /**
031     * millis since Epoch (UTC time zone).
032     */
033    private final long timestamp;
034
035    public Event(Object source) {
036        super(source);
037        this.timestamp = System.currentTimeMillis();
038    }
039
040    /**
041     * Returns the timestamp when this event occurred as the number of milliseconds since Epoch (UTC time zone).
042     *
043     * @return the timestamp when this event occurred as the number of milliseconds since Epoch (UTC time zone).
044     */
045    public long getTimestamp() {
046        return this.timestamp;
047    }
048}