| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.processor; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Predicate; |
| import org.apache.camel.Processor; |
| import org.apache.camel.util.ServiceHelper; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * The processor which implements the |
| * <a href="http://camel.apache.org/message-filter.html">Message Filter</a> EIP pattern. |
| * |
| * @version $Revision$ |
| */ |
| public class FilterProcessor extends DelegateProcessor implements Traceable { |
| private static final Log LOG = LogFactory.getLog(FilterProcessor.class); |
| private final Predicate predicate; |
| |
| public FilterProcessor(Predicate predicate, Processor processor) { |
| super(processor); |
| this.predicate = predicate; |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| boolean matches = predicate.matches(exchange); |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Filter matches: " + matches + " for exchange: " + exchange); |
| } |
| |
| if (matches) { |
| super.process(exchange); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "Filter[if: " + predicate + " do: " + getProcessor() + "]"; |
| } |
| |
| public String getTraceLabel() { |
| return "filter[if: " + predicate + "]"; |
| } |
| |
| public Predicate getPredicate() { |
| return predicate; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| super.doStart(); |
| ServiceHelper.startService(predicate); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| ServiceHelper.stopService(predicate); |
| super.doStop(); |
| } |
| } |