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.spi.IdAware;
025import org.apache.camel.support.ServiceSupport;
026import org.apache.camel.util.AsyncProcessorHelper;
027
028/**
029 * A processor which removes the header from the IN or OUT message
030 */
031public class RemoveHeaderProcessor extends ServiceSupport implements AsyncProcessor, Traceable, IdAware {
032    private final String headerName;
033    private String id;
034
035    public RemoveHeaderProcessor(String headerName) {
036        this.headerName = headerName;
037    }
038
039    public void process(Exchange exchange) throws Exception {
040        AsyncProcessorHelper.process(this, exchange);
041    }
042
043    @Override
044    public boolean process(Exchange exchange, AsyncCallback callback) {
045        try {
046            Message message = exchange.hasOut() ? exchange.getOut() : exchange.getIn();
047            message.removeHeader(headerName);
048        } catch (Exception e) {
049            exchange.setException(e);
050        }
051
052        callback.done(true);
053        return true;
054    }
055
056    @Override
057    public String toString() {
058        return "RemoveHeader(" + headerName + ")";
059    }
060
061    public String getTraceLabel() {
062        return "removeHeader[" + headerName + "]";
063    }
064
065    public String getId() {
066        return id;
067    }
068
069    public void setId(String id) {
070        this.id = id;
071    }
072
073    public String getHeaderName() {
074        return headerName;
075    }
076
077    @Override
078    protected void doStart() throws Exception {
079        // noop
080    }
081
082    @Override
083    protected void doStop() throws Exception {
084        // noop
085    }
086}