org.springframework.context.support.SimpleThreadScope Maven / Gradle / Ivy
/*
* Copyright 2002-2021 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.context.support;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.beans.factory.config.Scope;
import org.springframework.core.NamedThreadLocal;
import org.springframework.lang.Nullable;
/**
* A simple thread-backed {@link Scope} implementation.
*
* NOTE: This thread scope is not registered by default in common contexts.
* Instead, you need to explicitly assign it to a scope key in your setup, either through
* {@link org.springframework.beans.factory.config.ConfigurableBeanFactory#registerScope}
* or through a {@link org.springframework.beans.factory.config.CustomScopeConfigurer} bean.
*
*
{@code SimpleThreadScope} does not clean up any objects associated with it.
* It is therefore typically preferable to use a request-bound scope implementation such
* as {@code org.springframework.web.context.request.RequestScope} in web environments,
* implementing the full lifecycle for scoped attributes (including reliable destruction).
*
*
For an implementation of a thread-based {@code Scope} with support for destruction
* callbacks, refer to
* Spring by Example.
*
*
Thanks to Eugene Kuleshov for submitting the original prototype for a thread scope!
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 3.0
* @see org.springframework.web.context.request.RequestScope
*/
public class SimpleThreadScope implements Scope {
private static final Log logger = LogFactory.getLog(SimpleThreadScope.class);
private final ThreadLocal