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Polish "Tweak performance for Prometheus scraping endpoint"\n\nSee gh-30085

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This commit is contained in:
Moritz Halbritter
2022-03-09 11:31:23 +01:00
parent e2ebb56911
commit 93f31ee063
1 changed files with 2 additions and 2 deletions
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4
spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/export/prometheus/PrometheusScrapeEndpoint.java
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@@ -55,14 +55,14 @@ public class PrometheusScrapeEndpoint {
@ReadOperation(producesFrom = TextOutputFormat.class) @ReadOperation(producesFrom = TextOutputFormat.class)
public WebEndpointResponse<String> scrape(TextOutputFormat format, @Nullable Set<String> includedNames) { public WebEndpointResponse<String> scrape(TextOutputFormat format, @Nullable Set<String> includedNames) {
try { try {
Writer writer = new StringWriter(nextMetricsScrapeSize); Writer writer = new StringWriter(this.nextMetricsScrapeSize);
Enumeration<MetricFamilySamples> samples = (includedNames != null) Enumeration<MetricFamilySamples> samples = (includedNames != null)
? this.collectorRegistry.filteredMetricFamilySamples(includedNames) ? this.collectorRegistry.filteredMetricFamilySamples(includedNames)
: this.collectorRegistry.metricFamilySamples(); : this.collectorRegistry.metricFamilySamples();
format.write(writer, samples); format.write(writer, samples);
String scrapePage = writer.toString(); String scrapePage = writer.toString();
nextMetricsScrapeSize = scrapePage.length() + METRICS_SCRAPE_CHARS_EXTRA; this.nextMetricsScrapeSize = scrapePage.length() + METRICS_SCRAPE_CHARS_EXTRA;
return new WebEndpointResponse<>(scrapePage, format); return new WebEndpointResponse<>(scrapePage, format);
} }