spring security GlobalSecurityContextHolderStrategy 源码
spring security GlobalSecurityContextHolderStrategy 代码
文件路径：/core/src/main/java/org/springframework/security/core/context/GlobalSecurityContextHolderStrategy.java
/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* 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.security.core.context;
import org.springframework.util.Assert;
/**
* A <code>static</code> field-based implementation of
* {@link SecurityContextHolderStrategy}.
* <p>
* This means that all instances in the JVM share the same <code>SecurityContext</code>.
* This is generally useful with rich clients, such as Swing.
*
* @author Ben Alex
*/
final class GlobalSecurityContextHolderStrategy implements SecurityContextHolderStrategy {
private static SecurityContext contextHolder;
@Override
public void clearContext() {
contextHolder = null;
}
@Override
public SecurityContext getContext() {
if (contextHolder == null) {
contextHolder = new SecurityContextImpl();
}
return contextHolder;
}
@Override
public void setContext(SecurityContext context) {
Assert.notNull(context, "Only non-null SecurityContext instances are permitted");
contextHolder = context;
}
@Override
public SecurityContext createEmptyContext() {
return new SecurityContextImpl();
}
}
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