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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with 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,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  package org.apache.http.annotation;
28  
29  /**
30   Defines types of threading behavior enforced at runtime.
31   */
32  public enum ThreadingBehavior {
33  
34      /**
35       * Instances of classes with the given contract are expected to be fully immutable
36       * and thread-safe.
37       */
38      IMMUTABLE,
39  
40      /**
41       * Instances of classes with the given contract are expected to be immutable if their
42       * dependencies injected at construction time are immutable and are expected to be thread-safe
43       * if their dependencies are thread-safe.
44       */
45      IMMUTABLE_CONDITIONAL,
46  
47      /**
48       * Instances of classes with the given contract are expected to be fully thread-safe.
49       */
50      SAFE,
51  
52      /**
53       * Instances of classes with the given contract are expected to be thread-safe if their
54       * dependencies injected at construction time are thread-safe.
55       */
56      SAFE_CONDITIONAL,
57  
58      /**
59       * Instances of classes with the given contract are expected to be non thread-safe.
60       */
61      UNSAFE
62  
63  }