001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027package org.apache.http.annotation;
028
029/**
030 Defines types of threading behavior enforced at runtime.
031 */
032public enum ThreadingBehavior {
033
034    /**
035     * Instances of classes with the given contract are expected to be fully immutable
036     * and thread-safe.
037     */
038    IMMUTABLE,
039
040    /**
041     * Instances of classes with the given contract are expected to be immutable if their
042     * dependencies injected at construction time are immutable and are expected to be thread-safe
043     * if their dependencies are thread-safe.
044     */
045    IMMUTABLE_CONDITIONAL,
046
047    /**
048     * Instances of classes with the given contract are expected to be fully thread-safe.
049     */
050    SAFE,
051
052    /**
053     * Instances of classes with the given contract are expected to be thread-safe if their
054     * dependencies injected at construction time are thread-safe.
055     */
056    SAFE_CONDITIONAL,
057
058    /**
059     * Instances of classes with the given contract are expected to be non thread-safe.
060     */
061    UNSAFE
062
063}