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UrlBuilder supports adding multiple path segments at once #2016

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merged 2 commits into from
Sep 14, 2023

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schlosna
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Before this PR

For high volume services, adding the URL path segments can trigger reallocations as the list resizes.

Calls to non-deprecated endpoints incurred the cost of creating the deprecation metric name.

After this PR

==COMMIT_MSG==
UrlBuilder supports adding multiple path segments at once.
Deprecation metric is only created when a deprecated endpoint is invoked.
==COMMIT_MSG==

Possible downsides?

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changelog-app bot commented Sep 13, 2023

Generate changelog in changelog/@unreleased

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    and external consumers of the service's API (e.g. customer-written software or integrations).
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    performing database surgery, ...) at the time of upgrade for it to succeed.
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Type

  • Feature
  • Improvement
  • Fix
  • Break
  • Deprecation
  • Manual task
  • Migration

Description

UrlBuilder supports adding multiple path segments at once.
Deprecation metric is only created when a deprecated endpoint is invoked.

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Meter meter = metrics.deprecations(endpoint.serviceName());

// lazily create meter metric name only if deprecated endpoint is accessed
Supplier<Meter> meterSupplier = Suppliers.memoize(() -> metrics.deprecations(endpoint.serviceName()));
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I imagine this came up with something that used sticky sessions? iirc each sticky session client re-creates endpointchannel instances, which is why we memoize some other metrics.

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yep, I saw this on some of the major clients that use sticky sessions

@@ -80,7 +80,7 @@ public void fill(ListMultimap<String, String> parameters, UrlBuilder url) {
if (segment.fixed != null) {
url.pathSegment(segment.fixed);
} else {
parameters.get(segment.variable).forEach(url::pathSegment);
url.pathSegments(parameters.get(segment.variable));
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👍

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@carterkozak carterkozak left a comment

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thanks!

@bulldozer-bot bulldozer-bot bot merged commit 54b19b3 into develop Sep 14, 2023
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@bulldozer-bot bulldozer-bot bot deleted the ds/optimize branch September 14, 2023 01:55
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Released 3.92.0

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4 participants