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// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.metricsproxy.http.metrics;
import ai.vespa.metricsproxy.core.MetricsConsumers;
import ai.vespa.metricsproxy.core.MetricsManager;
import ai.vespa.metricsproxy.http.ValuesFetcher;
import ai.vespa.metricsproxy.metric.model.MetricsPacket;
import ai.vespa.metricsproxy.service.VespaServices;
import com.google.inject.Inject;
import com.yahoo.container.handler.metrics.ErrorResponse;
import com.yahoo.container.handler.metrics.HttpHandlerBase;
import com.yahoo.container.handler.metrics.JsonResponse;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.restapi.Path;
import java.net.URI;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import static ai.vespa.metricsproxy.metric.model.json.GenericJsonUtil.toGenericJsonModel;
import static com.yahoo.jdisc.Response.Status.INTERNAL_SERVER_ERROR;
import static com.yahoo.jdisc.Response.Status.OK;
/**
* Http handler for the metrics/v1 rest api.
*
* @author gjoranv
*/
public class MetricsV1Handler extends HttpHandlerBase {
public static final String V1_PATH = "/metrics/v1";
public static final String VALUES_PATH = V1_PATH + "/values";
private final ValuesFetcher valuesFetcher;
@Inject
public MetricsV1Handler(Executor executor,
MetricsManager metricsManager,
VespaServices vespaServices,
MetricsConsumers metricsConsumers) {
super(executor);
valuesFetcher = new ValuesFetcher(metricsManager, vespaServices, metricsConsumers);
}
@Override
public Optional<HttpResponse> doHandle(URI requestUri, Path apiPath, String consumer) {
if (apiPath.matches(V1_PATH)) return Optional.of(resourceListResponse(requestUri, List.of(VALUES_PATH)));
if (apiPath.matches(VALUES_PATH)) return Optional.of(valuesResponse(consumer));
return Optional.empty();
}
private JsonResponse valuesResponse(String consumer) {
try {
List<MetricsPacket> metrics = valuesFetcher.fetch(consumer);
return new JsonResponse(OK, toGenericJsonModel(metrics).serialize());
} catch (Exception e) {
log.log(Level.WARNING, "Got exception when rendering metrics:", e);
return new ErrorResponse(INTERNAL_SERVER_ERROR, e.getMessage());
}
}
}
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