package restx.monitor;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Timer;
import com.google.common.collect.ImmutableMap;
import restx.*;
import restx.factory.Component;
import restx.http.HttpStatus;
import restx.metrics.codahale.CodahaleMetricRegistry;
import java.io.IOException;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.TimeUnit;
/**
* User: xavierhanin
* Date: 2/9/13
* Time: 12:44 AM
*/
@Component
public class MonitorRouter extends RestxRouter {
public MonitorRouter(final restx.common.metrics.api.MetricRegistry metricsRegistry) {
super("restx-admin", "MonitorRouter",
getMonitorUIRoute(),
getGetMonitorRoute(metricsRegistry));
}
private static StdRoute getGetMonitorRoute(restx.common.metrics.api.MetricRegistry metricRegistry) {
if (!(metricRegistry instanceof CodahaleMetricRegistry)){
throw new IllegalStateException("restx-monitor-admin expects that module restx-monitor-codahale is loaded");
}
CodahaleMetricRegistry codahaleMetricRegistry = (CodahaleMetricRegistry) metricRegistry;
final MetricRegistry metrics = codahaleMetricRegistry.getCodahaleMetricRegistry();
return new StdRoute("MonitorRoute", new StdRestxRequestMatcher("GET", "/@/monitor")) {
@Override
public void handle(RestxRequestMatch match, RestxRequest req, RestxResponse resp, RestxContext ctx) throws IOException {
resp.setStatus(HttpStatus.OK);
resp.setContentType("application/json");
resp.getWriter().print("[");
int i = 0;
for (Map.Entry<String, Timer> timerEntry : metrics.getTimers().entrySet()) {
String label = timerEntry.getKey();
if (label.endsWith("/@/monitor")) {
// not include monitor information on this route itself
continue;
}
Timer timer = timerEntry.getValue();
if (i != 0) {
resp.getWriter().print(",");
}
double nsPerMs = 1000000;
resp.getWriter().print(String.format(Locale.ENGLISH,
"{ \"id\": %s, \"label\": \"%s\", \"hits\": %s, \"avg\": %.2f, \"lastVal\": %.2f, \"min\": %.2f, \"max\": %.2f," +
" \"active\": %.2f, \"avgActive\": %.2f }",
i++,
label,
timer.getCount(),
timer.getSnapshot().getMean() / nsPerMs,
timer.getSnapshot().getMedian() / nsPerMs,
timer.getSnapshot().getMin() / nsPerMs,
timer.getSnapshot().getMax() / nsPerMs,
timer.getOneMinuteRate(),
timer.getMeanRate()
));
}
resp.getWriter().print("]");
}
};
}
private static ResourcesRoute getMonitorUIRoute() {
return new ResourcesRoute("MonitorUIRoute", "/@/ui/monitor",
MonitorRouter.class.getPackage().getName(), ImmutableMap.of("", "index.html"));
}
}