49 lines
2.1 KiB
Java
49 lines
2.1 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Header:$
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*/
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package org.apache.beehive.controls.api.bean;
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/**
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* Specifies threading policy for control implementations. The constants
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* of this enumerated type describe the threading policies that apply
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* during execution of controls. They are used in conjunction with the
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* {@link Threading} annotation type to specify the responsibilities of
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* the runtime infrastructure and control implementation with respect to
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* threading.
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*/
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public enum ThreadingPolicy
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{
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/**
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* When a control implementation is declared as SINGLE_THREADED, the
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* controls infrastructure ensures that only a single thread will be
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* executing in a particular instance of that control at any time.
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* This is the default policy if no {@link Threading} annotation is
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* specified.
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*/
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SINGLE_THREADED,
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/**
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* When a control implementation is declared as MULTI_THREADED, the
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* controls infrastructure permits multiple threads to concurrently
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* execute in instances of that control. It is then the responsibility
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* of the implementation to ensure internal thread-safety using
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* standard Java concurrency mechanisms. This policy may yield higher
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* performance, at the cost of additional work on the implementor's part.
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*/
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MULTI_THREADED
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}
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