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The Core Camel Java DSL based router
/**
* 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.spi.IdAware;
import org.apache.camel.support.ServiceSupport;
import org.apache.camel.util.AsyncProcessorHelper;
import org.apache.camel.util.CamelLogger;
/**
* A processor which evaluates an {@link Expression} and logs it.
*
* @version
*/
public class LogProcessor extends ServiceSupport implements AsyncProcessor, Traceable, IdAware {
private String id;
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 {
if (logger.shouldLog()) {
String msg = expression.evaluate(exchange, String.class);
logger.doLog(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 + "]";
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public Expression getExpression() {
return expression;
}
public CamelLogger getLogger() {
return logger;
}
@Override
protected void doStart() throws Exception {
// noop
}
@Override
protected void doStop() throws Exception {
// noop
}
}