/**
* Copyright (C) 2012-2014 the original author or authors.
*
* Licensed 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 ninja.metrics;
import ninja.Context;
import ninja.NinjaDefault;
import ninja.Result;
import ninja.Route;
import ninja.exceptions.BadRequestException;
import com.codahale.metrics.Counter;
import com.codahale.metrics.Meter;
import com.codahale.metrics.MetricRegistry;
import com.google.inject.Inject;
/**
* An implementation of DefaultNinja instrumented for collecting request
* metrics.
*
* @author James Moger
*
*/
public class InstrumentedNinja extends NinjaDefault {
@Inject
protected MetricsService metricsService;
protected Meter allRequestsMeter;
protected Counter activeRequests;
protected Meter badRequests;
protected Meter internalServerErrors;
protected Meter routesNotFound;
@Override
public void onFrameworkStart() {
MetricRegistry metrics = metricsService.getMetricRegistry();
allRequestsMeter = metrics.meter(MetricsService.METER_ALL_REQUESTS);
activeRequests = metrics.counter(MetricsService.COUNTER_ACTIVE_REQUESTS);
badRequests = metrics.meter(MetricsService.METER_BAD_REQUESTS);
internalServerErrors = metrics.meter(MetricsService.METER_INTERNAL_SERVER_ERRORS);
routesNotFound = metrics.meter(MetricsService.METER_ROUTES_NOT_FOUND);
super.onFrameworkStart();
}
@Override
@Timed
public void onRouteRequest(Context.Impl context) {
activeRequests.inc();
String httpMethod = context.getMethod();
Route route = router.getRouteFor(httpMethod, context.getRequestPath());
context.setRoute(route);
if (route != null) {
allRequestsMeter.mark();
try {
Result result = route.getFilterChain().next(context);
resultHandler.handleResult(result, context);
} catch (Exception exception) {
if (exception instanceof BadRequestException) {
badRequests.mark();
} else {
internalServerErrors.mark();
}
Result result = onException(context, exception);
renderErrorResultAndCatchAndLogExceptions(result, context);
}
} else {
// throw a 404 "not found" because we did not find the route
routesNotFound.mark();
Result result = getNotFoundResult(context);
renderErrorResultAndCatchAndLogExceptions(result, context);
}
activeRequests.dec();
}
}