/**
* 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.jooby.metrics;
import org.jooby.Request;
import org.jooby.Response;
import org.jooby.Route;
import org.jooby.Route.Chain;
import org.jooby.Status;
import com.codahale.metrics.Counter;
import com.codahale.metrics.Meter;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Timer;
/**
* Track request information like: active requests, request time and responses.
*
* @author edgar
* @since 0.13.0
*/
public class InstrumentedHandler implements Route.Filter {
@Override
public void handle(final Request req, final Response rsp, final Chain chain) throws Throwable {
MetricRegistry registry = req.require(MetricRegistry.class);
Counter counter = registry.counter("request.actives");
Timer.Context timer = registry.timer("request").time();
try {
counter.inc();
chain.next(req, rsp);
} finally {
timer.stop();
counter.dec();
Meter meter = registry.meter("responses." + rsp.status().orElse(Status.OK).value());
meter.mark();
}
}
}