001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.spi;
018
019import java.lang.annotation.ElementType;
020import java.lang.annotation.Repeatable;
021import java.lang.annotation.Retention;
022import java.lang.annotation.RetentionPolicy;
023import java.lang.annotation.Target;
024
025import org.apache.camel.Message;
026
027/**
028 * Marks a method as being invoked for a specific header value.
029 * <p/>
030 * This can be used by Component implementations that uses org.apache.camel.support.HeaderSelectorProducer.
031 *
032 * @see Message#getHeader(String)
033 */
034@Repeatable(InvokeOnHeaders.class)
035@Retention(RetentionPolicy.RUNTIME)
036@Target(ElementType.METHOD)
037public @interface InvokeOnHeader {
038
039    /**
040     * Name of header.
041     */
042    String value();
043}