| /** |
| * 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.AsyncCallback; |
| import org.apache.camel.AsyncProcessor; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| import org.apache.camel.Traceable; |
| import org.apache.camel.util.AsyncProcessorHelper; |
| import org.apache.camel.util.CamelLogger; |
| |
| /** |
| * A processor which evaluates an Expression and logs it. |
| * |
| * @version |
| */ |
| public class LogProcessor implements AsyncProcessor, Traceable { |
| |
| private final Expression expression; |
| private final CamelLogger logger; |
| |
| public LogProcessor(Expression expression, CamelLogger logger) { |
| this.expression = expression; |
| this.logger = logger; |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| AsyncProcessorHelper.process(this, exchange); |
| } |
| |
| @Override |
| public boolean process(Exchange exchange, AsyncCallback callback) { |
| try { |
| String msg = expression.evaluate(exchange, String.class); |
| logger.log(msg); |
| } catch (Exception e) { |
| exchange.setException(e); |
| } finally { |
| // callback must be invoked |
| callback.done(true); |
| } |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return "Log(" + logger.getLog().getName() + ")[" + expression + "]"; |
| } |
| |
| public String getTraceLabel() { |
| return "log[" + expression + "]"; |
| } |
| } |