/**
* @summary get the worker metrics
* @return the response object
*/
@GET
@Path(GET_METRICS)
@ReturnType("java.util.SortedMap<String, Long>")
public Response getMetrics() {
MetricRegistry metricRegistry = mWorker.getWorkerMetricsSystem().getMetricRegistry();
// Get all counters.
Map<String, Counter> counters = metricRegistry.getCounters();
// Only the gauge for cached blocks is retrieved here, other gauges are statistics of free/used
// spaces, those statistics can be gotten via other REST apis.
String blocksCachedProperty =
CommonUtils.argsToString(
".", WorkerContext.getWorkerSource().getName(), WorkerSource.BLOCKS_CACHED);
@SuppressWarnings("unchecked")
Gauge<Integer> blocksCached =
(Gauge<Integer>) metricRegistry.getGauges().get(blocksCachedProperty);
// Get values of the counters and gauges and put them into a metrics map.
SortedMap<String, Long> metrics = new TreeMap<>();
for (Map.Entry<String, Counter> counter : counters.entrySet()) {
metrics.put(counter.getKey(), counter.getValue().getCount());
}
metrics.put(blocksCachedProperty, blocksCached.getValue().longValue());
return RestUtils.createResponse(metrics);
}
