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.processor;
018
019import org.apache.camel.AsyncCallback;
020import org.apache.camel.AsyncProcessor;
021import org.apache.camel.Exchange;
022import org.apache.camel.Message;
023import org.apache.camel.Traceable;
024import org.apache.camel.support.ServiceSupport;
025import org.apache.camel.util.AsyncProcessorHelper;
026
027/**
028 * A processor which removes the header from the IN or OUT message
029 */
030public class RemoveHeaderProcessor extends ServiceSupport implements AsyncProcessor, Traceable {
031    private final String headerName;
032
033    public RemoveHeaderProcessor(String headerName) {
034        this.headerName = headerName;
035    }
036
037    public void process(Exchange exchange) throws Exception {
038        AsyncProcessorHelper.process(this, exchange);
039    }
040
041    @Override
042    public boolean process(Exchange exchange, AsyncCallback callback) {
043        try {
044            Message message = exchange.hasOut() ? exchange.getOut() : exchange.getIn();
045            message.removeHeader(headerName);
046        } catch (Exception e) {
047            exchange.setException(e);
048        }
049
050        callback.done(true);
051        return true;
052    }
053
054    @Override
055    public String toString() {
056        return "RemoveHeader(" + headerName + ")";
057    }
058
059    public String getTraceLabel() {
060        return "removeHeader[" + headerName + "]";
061    }
062
063    @Override
064    protected void doStart() throws Exception {
065        // noop
066    }
067
068    @Override
069    protected void doStop() throws Exception {
070        // noop
071    }
072}