spring-session SaveMode 源码
spring-session SaveMode 代码
文件路径：/spring-session-core/src/main/java/org/springframework/session/SaveMode.java
/*
* Copyright 2014-2019 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.session;
/**
* Supported modes of tracking and saving session changes to session store.
*
* @author Rob Winch
* @author Vedran Pavic
* @since 2.2.0
*/
public enum SaveMode {
/**
* Save only changes made to session, for instance using
* {@link Session#setAttribute(String, Object)}. In highly concurrent environments,
* this mode minimizes the risk of attributes being overwritten during processing of
* parallel requests.
*/
ON_SET_ATTRIBUTE,
/**
* Same as {@link #ON_SET_ATTRIBUTE} with addition of saving attributes that have been
* read using {@link Session#getAttribute(String)}.
*/
ON_GET_ATTRIBUTE,
/**
* Always save all session attributes, regardless of the interaction with the session.
* In highly concurrent environments, this mode increases the risk of attributes being
* overwritten during processing of parallel requests.
*/
ALWAYS
}
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