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 one ore more headers from the IN or OUT message
029 */
030public class RemoveHeadersProcessor extends ServiceSupport implements AsyncProcessor, Traceable {
031    private final String pattern;
032    private final String[] excludePattern;
033
034    public RemoveHeadersProcessor(String pattern, String[] excludePattern) {
035        this.pattern = pattern;
036        this.excludePattern = excludePattern;
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.removeHeaders(pattern, excludePattern);
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 "RemoveHeaders(" + pattern + ")";
059    }
060
061    public String getTraceLabel() {
062        return "removeHeaders[" + pattern + "]";
063    }
064
065    @Override
066    protected void doStart() throws Exception {
067        // noop
068    }
069
070    @Override
071    protected void doStop() throws Exception {
072        // noop
073    }
074}