/**
* 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 java.util.Set;
import org.apache.camel.AsyncCallback;
import org.apache.camel.AsyncProcessor;
import org.apache.camel.Exchange;
import org.apache.camel.LoggingLevel;
import org.apache.camel.Processor;
import org.apache.camel.spi.ExchangeFormatter;
import org.apache.camel.spi.IdAware;
import org.apache.camel.spi.LogListener;
import org.apache.camel.spi.MaskingFormatter;
import org.apache.camel.util.AsyncProcessorHelper;
import org.apache.camel.util.CamelLogger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A {@link Processor} which just logs to a {@link CamelLogger} object which can be used
* as an exception handler instead of using a dead letter queue.
* <p/>
* The name <tt>CamelLogger</tt> has been chosen to avoid any name clash with log kits
* which has a <tt>Logger</tt> class.
*
* @version
*/
public class CamelLogProcessor implements AsyncProcessor, IdAware {
private static final Logger LOG = LoggerFactory.getLogger(CamelLogProcessor.class);
private String id;
private CamelLogger log;
private ExchangeFormatter formatter;
private MaskingFormatter maskingFormatter;
private Set<LogListener> listeners;
public CamelLogProcessor() {
this(new CamelLogger(CamelLogProcessor.class.getName()));
}
public CamelLogProcessor(CamelLogger log) {
this.formatter = new ToStringExchangeFormatter();
this.log = log;
}
public CamelLogProcessor(CamelLogger log, ExchangeFormatter formatter, MaskingFormatter maskingFormatter, Set<LogListener> listeners) {
this(log);
this.formatter = formatter;
this.maskingFormatter = maskingFormatter;
this.listeners = listeners;
}
@Override
public String toString() {
return "Logger[" + log + "]";
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public void process(Exchange exchange) throws Exception {
AsyncProcessorHelper.process(this, exchange);
}
public boolean process(Exchange exchange, AsyncCallback callback) {
if (log.shouldLog()) {
String output = formatter.format(exchange);
if (maskingFormatter != null) {
output = maskingFormatter.format(output);
}
output = fireListeners(exchange, output);
log.log(output);
}
callback.done(true);
return true;
}
public void process(Exchange exchange, Throwable exception) {
if (log.shouldLog()) {
String output = formatter.format(exchange);
if (maskingFormatter != null) {
output = maskingFormatter.format(output);
}
output = fireListeners(exchange, output);
log.log(output, exception);
}
}
public void process(Exchange exchange, String message) {
if (log.shouldLog()) {
String output = formatter.format(exchange) + message;
if (maskingFormatter != null) {
output = maskingFormatter.format(output);
}
output = fireListeners(exchange, output);
log.log(output);
}
}
private String fireListeners(Exchange exchange, String message) {
if (listeners == null) {
return message;
}
for (LogListener listener : listeners) {
if (listener == null) {
continue;
}
try {
String output = listener.onLog(exchange, log, message);
message = output != null ? output : message;
} catch (Throwable t) {
LOG.warn("Ignoring an exception thrown by {}: {}", listener.getClass().getName(), t.getMessage());
if (LOG.isDebugEnabled()) {
LOG.debug("", t);
}
}
}
return message;
}
public CamelLogger getLogger() {
return log;
}
public void setLogName(String logName) {
log.setLogName(logName);
}
public void setLevel(LoggingLevel level) {
log.setLevel(level);
}
public void setMarker(String marker) {
log.setMarker(marker);
}
public void setMaskingFormatter(MaskingFormatter maskingFormatter) {
this.maskingFormatter = maskingFormatter;
}
/**
* {@link ExchangeFormatter} that calls <tt>toString</tt> on the {@link Exchange}.
*/
static class ToStringExchangeFormatter implements ExchangeFormatter {
public String format(Exchange exchange) {
return exchange.toString();
}
}
}