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// Copyright Vespa.ai. 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.http.application.ClusterIdDimensionProcessor;
import ai.vespa.metricsproxy.http.application.Node;
import ai.vespa.metricsproxy.http.application.PublicDimensionsProcessor;
import ai.vespa.metricsproxy.http.application.ServiceIdDimensionProcessor;
import ai.vespa.metricsproxy.metric.model.MetricsPacket;
import ai.vespa.metricsproxy.metric.model.processing.MetricsProcessor;
import ai.vespa.metricsproxy.service.VespaServices;
import com.yahoo.component.annotation.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.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import static ai.vespa.metricsproxy.metric.model.json.GenericJsonUtil.toGenericApplicationModel;
import static ai.vespa.metricsproxy.metric.model.processing.MetricsProcessor.applyProcessors;
import static com.yahoo.jdisc.Response.Status.INTERNAL_SERVER_ERROR;
import static com.yahoo.jdisc.Response.Status.OK;
/**
* Http handler for the metrics/v2 rest api.
*
* @author gjoranv
*/
public class MetricsV2Handler extends HttpHandlerBase {
public static final String V2_PATH = "/metrics/v2";
public static final String VALUES_PATH = V2_PATH + "/values";
private final ValuesFetcher valuesFetcher;
private final NodeInfoConfig nodeInfoConfig;
@Inject
public MetricsV2Handler(Executor executor,
MetricsManager metricsManager,
VespaServices vespaServices,
MetricsConsumers metricsConsumers,
NodeInfoConfig nodeInfoConfig) {
super(executor);
this.nodeInfoConfig = nodeInfoConfig;
valuesFetcher = new ValuesFetcher(metricsManager, vespaServices, metricsConsumers);
}
@Override
public Optional<HttpResponse> doHandle(URI requestUri, Path apiPath, String consumer) {
if (apiPath.matches(V2_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 = processAndBuild(valuesFetcher.fetchMetricsAsBuilders(consumer),
new ServiceIdDimensionProcessor(),
new ClusterIdDimensionProcessor(),
new PublicDimensionsProcessor());
Node localNode = new Node(nodeInfoConfig.role(), nodeInfoConfig.hostname(), 0, "");
Map<Node, List<MetricsPacket>> metricsByNode = Map.of(localNode, metrics);
return new JsonResponse(OK, toGenericApplicationModel(metricsByNode).serialize());
} catch (Exception e) {
log.log(Level.WARNING, "Got exception when rendering metrics:", e);
return new ErrorResponse(INTERNAL_SERVER_ERROR, e.getMessage());
}
}
private static List<MetricsPacket> processAndBuild(MetricsPacket.Builder [] builders,
MetricsProcessor... processors) {
List<MetricsPacket> metricsPackets = new ArrayList<>(builders.length);
for (int i = 0; i < builders.length; i++) {
applyProcessors(builders[i], processors);
metricsPackets.add(builders[i].build());
builders[i] = null; // Set null to be able to GC the builder when packet has been created
}
return metricsPackets;
}
}
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