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1   /*
2    * ====================================================================
3    *
4    *  Licensed to the Apache Software Foundation (ASF) under one or more
5    *  contributor license agreements.  See the NOTICE file distributed with
6    *  this work for additional information regarding copyright ownership.
7    *  The ASF licenses this file to You under the Apache License, Version 2.0
8    *  (the "License"); you may not use this file except in compliance with
9    *  the License.  You may obtain a copy of the License at
10   *
11   *      http://www.apache.org/licenses/LICENSE-2.0
12   *
13   *  Unless required by applicable law or agreed to in writing, software
14   *  distributed under the License is distributed on an "AS IS" BASIS,
15   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16   *  See the License for the specific language governing permissions and
17   *  limitations under the License.
18   * ====================================================================
19   *
20   * This software consists of voluntary contributions made by many
21   * individuals on behalf of the Apache Software Foundation.  For more
22   * information on the Apache Software Foundation, please see
23   * <http://www.apache.org/>.
24   *
25   */
26  package org.apache.http.annotation;
27  
28  import java.lang.annotation.Documented;
29  import java.lang.annotation.ElementType;
30  import java.lang.annotation.Retention;
31  import java.lang.annotation.RetentionPolicy;
32  import java.lang.annotation.Target;
33  
34  /**
35   * The class to which this annotation is applied is not thread-safe.
36   * This annotation primarily exists for clarifying the non-thread-safety of a class
37   * that might otherwise be assumed to be thread-safe, despite the fact that it is a bad
38   * idea to assume a class is thread-safe without good reason.
39   * @see ThreadSafe
40   * <p>
41   * Based on code developed by Brian Goetz and Tim Peierls and concepts
42   * published in 'Java Concurrency in Practice' by Brian Goetz, Tim Peierls,
43   * Joshua Bloch, Joseph Bowbeer, David Holmes and Doug Lea.
44   */
45  @Documented
46  @Target(ElementType.TYPE)
47  @Retention(RetentionPolicy.CLASS) // The original version used RUNTIME
48  public @interface NotThreadSafe {
49  }