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/*
 * Copyright (c) 2011-2018, Meituan Dianping. All Rights Reserved.
 *
 * 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 com.dianping.cat.message;

/**
	* 
	* Event is used to log anything interesting happens at a specific time. Such as an exception thrown, a
	* review added by user, a new user registered, an user logged into the system etc.
	* 
	* 
	* 

	* However, if it could be failure, or last for a long time, such as a remote API call, database call or search engine
	* call etc. It should be logged as a Transaction
	* 
	* 
	* 

	* All CAT message will be constructed as a message tree and send to back-end for further analysis, and for monitoring.
	* Only Transaction can be a tree node, all other message will be the tree leaf.　The transaction without
	* other messages nested is an atomic transaction.
	* 
	*
	* @author Frankie Wu
	*/
public interface Event extends Message {

}