javax.servlet.SingleThreadModel Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 javax.servlet;
/**
* Ensures that servlets handle
* only one request at a time. This interface has no methods.
*
* If a servlet implements this interface, you are guaranteed
* that no two threads will execute concurrently in the
* servlet's service method. The servlet container
* can make this guarantee by synchronizing access to a single
* instance of the servlet, or by maintaining a pool of servlet
* instances and dispatching each new request to a free servlet.
*
*
Note that SingleThreadModel does not solve all thread safety
* issues. For example, session attributes and static variables can
* still be accessed by multiple requests on multiple threads
* at the same time, even when SingleThreadModel servlets are used.
* It is recommended that a developer take other means to resolve
* those issues instead of implementing this interface, such as
* avoiding the usage of an instance variable or synchronizing
* the block of the code accessing those resources.
* This interface is deprecated in Servlet API version 2.4.
*
* @version $Rev: 788194 $ $Date: 2009-06-24 18:05:48 -0400 (Wed, 24 Jun 2009) $
*
* @deprecated As of Java Servlet API 2.4, with no direct
* replacement.
*/
public interface SingleThreadModel {
}