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docs(java): Add Micrometer integration guide - #19463

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@adinauer

@adinauer adinauer commented Sep 17, 2026

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Add a Java and Spring Boot guide for the new sentry-micrometer integration.

The guide covers installation, explicit Spring Boot opt-in, plain Java registry setup, metric mappings, passive polling, filtering, verification, and shutdown. It also documents the default identity naming convention and the volume implications of forwarding active meters immediately.

This is a standalone docs PR against master for the sentry-java Micrometer implementation stack.

Related release-registry metadata: getsentry/sentry-release-registry#247

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Thanks in advance for your help!

PRE-MERGE CHECKLIST

  • Checked Vercel preview for correctness, including links
  • PR was reviewed and approved by any necessary SMEs (subject matter experts)
  • PR was reviewed and approved by a member of the Sentry docs team

Document plain Java and Spring Boot setup for exporting Micrometer metrics to Sentry, including mappings, polling, filtering, and lifecycle guidance.

Co-Authored-By: Claude <noreply@anthropic.com>
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Document the Sentry registry's dot naming convention and update the verification example to use the exported metric name.

Co-Authored-By: Claude <noreply@anthropic.com>
Document the identity naming convention, show that mixed separators remain unchanged, and describe mapped names as exported rather than converted.

Co-Authored-By: Claude <noreply@anthropic.com>
Document that FunctionTimer count and total-time values use independent
baselines. Remove the unsafe weighted-mean recipe because failures and
resets can make the exported deltas cover different polling windows.

Co-Authored-By: Claude <noreply@anthropic.com>
State that Spring Boot users need the matching Sentry starter in addition
to the Micrometer module so the documented auto-configuration is loaded.

Co-Authored-By: Claude <noreply@anthropic.com>
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