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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.application;
import ai.vespa.metricsproxy.core.MetricsConsumers;
import ai.vespa.metricsproxy.metric.model.ConsumerId;
import ai.vespa.metricsproxy.metric.model.MetricsPacket;
import ai.vespa.metricsproxy.metric.model.processing.MetricsProcessor;
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.HashMap;
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.http.ValuesFetcher.getConsumerOrDefault;
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;
import static java.util.stream.Collectors.toList;
/**
* Http handler that returns metrics for all nodes in the Vespa application.
*
* @author gjoranv
*/
public class ApplicationMetricsHandler extends HttpHandlerBase {
public static final String V1_PATH = "/applicationmetrics/v1";
static final String VALUES_PATH = V1_PATH + "/values";
private static final int MAX_DIMENSIONS = 10;
private final ApplicationMetricsRetriever metricsRetriever;
private final MetricsConsumers metricsConsumers;
@Inject
public ApplicationMetricsHandler(Executor executor,
ApplicationMetricsRetriever metricsRetriever,
MetricsConsumers metricsConsumers) {
super(executor);
this.metricsRetriever = metricsRetriever;
this.metricsConsumers = 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(applicationMetricsResponse(consumer));
return Optional.empty();
}
private JsonResponse applicationMetricsResponse(String requestedConsumer) {
try {
ConsumerId consumer = getConsumerOrDefault(requestedConsumer, metricsConsumers);
var buildersByNode = metricsRetriever.getMetrics(consumer);
var metricsByNode = processAndBuild(buildersByNode,
new ServiceIdDimensionProcessor(),
new ClusterIdDimensionProcessor(),
new PublicDimensionsProcessor(MAX_DIMENSIONS));
return new JsonResponse(OK, toGenericApplicationModel(metricsByNode).serialize());
} catch (Exception e) {
log.log(Level.WARNING, "Got exception when retrieving metrics:", e);
return new ErrorResponse(INTERNAL_SERVER_ERROR, e.getMessage());
}
}
private static Map<Node, List<MetricsPacket>> processAndBuild(Map<Node, List<MetricsPacket.Builder>> buildersByNode,
MetricsProcessor... processors) {
var metricsByNode = new HashMap<Node, List<MetricsPacket>>();
buildersByNode.forEach((node, builders) -> {
var metrics = builders.stream()
.map(builder -> applyProcessors(builder, processors))
.map(MetricsPacket.Builder::build)
.collect(toList());
metricsByNode.put(node, metrics);
});
return metricsByNode;
}
}
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