001/**
002 * Copyright (c) 2012, 2014, Credit Suisse (Anatole Tresch), Werner Keil and others by the @author tag.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
005 * use this file except in compliance with the License. You may obtain a copy of
006 * the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
013 * License for the specific language governing permissions and limitations under
014 * the License.
015 */
016package org.javamoney.moneta.spi;
017
018import java.lang.annotation.Documented;
019import java.lang.annotation.ElementType;
020import java.lang.annotation.Retention;
021import java.lang.annotation.RetentionPolicy;
022import java.lang.annotation.Target;
023
024/**
025 * Annotation used for prioritizing multiple services of the same type. The resulting order can be
026 * used, for defining the order within a chain of services, or to select the implementation to be
027 * used.
028 *
029 * @author Anatole Tresch
030 */
031@Target(ElementType.TYPE)
032@Retention(RetentionPolicy.RUNTIME)
033@Documented
034public @interface ServicePriority {
035
036    /**
037     * Normal priority.
038     */
039    public static final int NORM_PRIORITY = 0;
040    /**
041     * Low priority.
042     */
043    public static final int LOW_PRIORITY = -100;
044    /**
045     * High priority.
046     */
047    public static final int HIGH_PRIORITY = 100;
048
049    /**
050     * The priority value.
051     */
052    int value();
053}