/**
* 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.component.metrics.timer;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Timer;
import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.component.metrics.AbstractMetricsProducer;
import org.apache.camel.component.metrics.timer.TimerEndpoint.TimerAction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.camel.component.metrics.MetricsConstants.HEADER_TIMER_ACTION;
import static org.apache.camel.component.metrics.timer.TimerEndpoint.ENDPOINT_URI;
public class TimerProducer extends AbstractMetricsProducer<TimerEndpoint> {
private static final Logger LOG = LoggerFactory.getLogger(TimerProducer.class);
public TimerProducer(TimerEndpoint endpoint) {
super(endpoint);
}
@Override
protected void doProcess(Exchange exchange, TimerEndpoint endpoint, MetricRegistry registry, String metricsName) throws Exception {
Message in = exchange.getIn();
TimerAction action = endpoint.getAction();
TimerAction finalAction = in.getHeader(HEADER_TIMER_ACTION, action, TimerAction.class);
if (finalAction == TimerAction.start) {
handleStart(exchange, registry, metricsName);
} else if (finalAction == TimerAction.stop) {
handleStop(exchange, registry, metricsName);
} else {
LOG.warn("No action provided for timer \"{}\"", metricsName);
}
}
void handleStart(Exchange exchange, MetricRegistry registry, String metricsName) {
String propertyName = getPropertyName(metricsName);
Timer.Context context = getTimerContextFromExchange(exchange, propertyName);
if (context == null) {
Timer timer = registry.timer(metricsName);
context = timer.time();
exchange.setProperty(propertyName, context);
} else {
LOG.warn("Timer \"{}\" already running", metricsName);
}
}
void handleStop(Exchange exchange, MetricRegistry registry, String metricsName) {
String propertyName = getPropertyName(metricsName);
Timer.Context context = getTimerContextFromExchange(exchange, propertyName);
if (context != null) {
context.stop();
exchange.removeProperty(propertyName);
} else {
LOG.warn("Timer \"{}\" not found", metricsName);
}
}
String getPropertyName(String metricsName) {
return new StringBuilder(ENDPOINT_URI)
.append(":")
.append(metricsName)
.toString();
}
Timer.Context getTimerContextFromExchange(Exchange exchange, String propertyName) {
return exchange.getProperty(propertyName, Timer.Context.class);
}
}