spring DisableReferenceClearingContextCustomizer 源码
springboot DisableReferenceClearingContextCustomizer 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/DisableReferenceClearingContextCustomizer.java
/*
* Copyright 2012-2022 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.boot.web.embedded.tomcat;
import org.apache.catalina.Context;
import org.apache.catalina.core.StandardContext;
/**
* A {@link TomcatContextCustomizer} that disables Tomcat's reflective reference clearing
* to avoid reflective access warnings on Java 9 and later JVMs.
*
* @author Andy Wilkinson
*/
class DisableReferenceClearingContextCustomizer implements TomcatContextCustomizer {
@Override
public void customize(Context context) {
if (!(context instanceof StandardContext standardContext)) {
return;
}
try {
standardContext.setClearReferencesObjectStreamClassCaches(false);
standardContext.setClearReferencesRmiTargets(false);
standardContext.setClearReferencesThreadLocals(false);
}
catch (NoSuchMethodError ex) {
// Earlier version of Tomcat (probably without
// setClearReferencesThreadLocals). Continue.
}
}
}
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