org.springframework.web.context.request.SessionScope Maven / Gradle / Ivy
/*
* Copyright 2002-2016 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
*
* 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 org.springframework.web.context.request;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.lang.Nullable;
/**
* Session-backed {@link org.springframework.beans.factory.config.Scope}
* implementation.
*
* Relies on a thread-bound {@link RequestAttributes} instance, which
* can be exported through {@link RequestContextListener},
* {@link org.springframework.web.filter.RequestContextFilter} or
* {@link org.springframework.web.servlet.DispatcherServlet}.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Rob Harrop
* @since 2.0
* @see RequestContextHolder#currentRequestAttributes()
* @see RequestAttributes#SCOPE_SESSION
* @see RequestContextListener
* @see org.springframework.web.filter.RequestContextFilter
* @see org.springframework.web.servlet.DispatcherServlet
*/
public class SessionScope extends AbstractRequestAttributesScope {
@Override
protected int getScope() {
return RequestAttributes.SCOPE_SESSION;
}
@Override
public String getConversationId() {
return RequestContextHolder.currentRequestAttributes().getSessionId();
}
@Override
public Object get(String name, ObjectFactory objectFactory) {
Object mutex = RequestContextHolder.currentRequestAttributes().getSessionMutex();
synchronized (mutex) {
return super.get(name, objectFactory);
}
}
@Override
@Nullable
public Object remove(String name) {
Object mutex = RequestContextHolder.currentRequestAttributes().getSessionMutex();
synchronized (mutex) {
return super.remove(name);
}
}
}