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/*
* Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
*/
package ai.vespa.metricsproxy.http;
import ai.vespa.metricsproxy.core.MetricsConsumers;
import ai.vespa.metricsproxy.core.MetricsManager;
import ai.vespa.metricsproxy.metric.model.ConsumerId;
import ai.vespa.metricsproxy.metric.model.MetricsPacket;
import ai.vespa.metricsproxy.metric.model.json.JsonRenderingException;
import ai.vespa.metricsproxy.service.VespaServices;
import com.google.inject.Inject;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.ThreadedHttpRequestHandler;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.time.Instant;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import static ai.vespa.metricsproxy.metric.model.ConsumerId.toConsumerId;
import static ai.vespa.metricsproxy.metric.model.json.GenericJsonUtil.toGenericJsonModel;
/**
* Http handler that exposes the generic metrics format.
*
* @author gjoranv
*/
public class GenericMetricsHandler extends ThreadedHttpRequestHandler {
private static final Logger log = Logger.getLogger(GenericMetricsHandler.class.getName());
public static final ConsumerId DEFAULT_PUBLIC_CONSUMER_ID = toConsumerId("default");
private final MetricsConsumers metricsConsumers;
private final MetricsManager metricsManager;
private final VespaServices vespaServices;
@Inject
public GenericMetricsHandler(Executor executor,
MetricsManager metricsManager,
VespaServices vespaServices,
MetricsConsumers metricsConsumers) {
super(executor);
this.metricsConsumers = metricsConsumers;
this.metricsManager = metricsManager;
this.vespaServices = vespaServices;
}
@Override
public HttpResponse handle(HttpRequest request) {
try {
ConsumerId consumer = getConsumerOrDefault(request.getProperty("consumer"));
List<MetricsPacket> metrics = metricsManager.getMetrics(vespaServices.getVespaServices(), Instant.now())
.stream()
.filter(metricsPacket -> metricsPacket.consumers().contains(consumer))
.collect(Collectors.toList());
return new Response(200, toGenericJsonModel(metrics).serialize());
} catch (JsonRenderingException e) {
return new Response(500, e.getMessageAsJson());
}
}
private ConsumerId getConsumerOrDefault(String consumer) {
if (consumer == null) return DEFAULT_PUBLIC_CONSUMER_ID;
ConsumerId consumerId = toConsumerId(consumer);
if (! metricsConsumers.getAllConsumers().contains(consumerId)) {
log.info("No consumer with id '" + consumer + "' - using the default consumer instead.");
return DEFAULT_PUBLIC_CONSUMER_ID;
}
return consumerId;
}
private static class Response extends HttpResponse {
private final byte[] data;
Response(int code, String data) {
super(code);
this.data = data.getBytes(Charset.forName(DEFAULT_CHARACTER_ENCODING));
}
@Override
public String getContentType() {
return "application/json";
}
@Override
public void render(OutputStream outputStream) throws IOException {
outputStream.write(data);
}
}
}
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