Stabilize PeriodicMetricReaderBuilder#setMaxExportBatchSize

[dashpole]

Stabilizes PeriodicMetricReaderBuilder#setMaxExportBatchSize(int) following its stabilization in the OpenTelemetry Specification (open-telemetry/opentelemetry-specification#5291).

Changes

• Make PeriodicMetricReaderBuilder#setMaxExportBatchSize(int) public (@since 1.67.0).
• Remove the internal reflective helper SdkMeterProviderUtil#setMaxExportBatchSize.
• Update declarative configuration's MetricReaderFactory to call builder.setMaxExportBatchSize(...) directly.

[otelbot]

⚠️ API changes detected — additional maintainer review required

@jack-berg @jkwatson

This PR modifies the public API surface area of the following module(s):

• opentelemetry-sdk-metrics

Please review the changes in docs/apidiffs/current_vs_latest/ carefully before approving.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.43%. Comparing base (26287d4) to head (246bd89).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8829      +/-   ##
============================================
- Coverage     91.44%   91.43%   -0.01%     
+ Complexity    10667    10666       -1     
============================================
  Files          1007     1007              
  Lines         28686    28678       -8     
  Branches       3676     3676              
============================================
- Hits          26232    26223       -9     
+ Misses         1657     1656       -1     
- Partials        797      799       +2     

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[Copilot]

🟢 Approval recommended

No unresolved review issues were identified.

Pull request overview

Stabilizes PeriodicMetricReaderBuilder#setMaxExportBatchSize(int) as public API and removes the reflective workaround.

Changes:

• Exposes the batch-size setter publicly.
• Updates declarative configuration and tests.
• Removes the obsolete helper and records the API diff.

File summaries

File	Description
sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/internal/SdkMeterProviderUtil.java	Removes the reflective helper.
sdk/metrics/src/main/java/io/opentelemetry/sdk/metrics/export/PeriodicMetricReaderBuilder.java	Exposes the batch-size setter publicly.
sdk-extensions/declarative-config/src/test/java/io/opentelemetry/sdk/autoconfigure/declarativeconfig/MetricReaderFactoryTest.java	Updates expected builder usage.
sdk-extensions/declarative-config/src/main/java/io/opentelemetry/sdk/autoconfigure/declarativeconfig/MetricReaderFactory.java	Calls the public setter directly.
docs/apidiffs/current_vs_latest/opentelemetry-sdk-metrics.txt	Records the API visibility change.

Review details

• Files reviewed: 5/5 changed files
• Comments generated: 0
• Review effort level: Lite (auto)

Note

Copilot is running an experiment and ran this review at Lite.

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[opentelemetry-pr-dashboard]

Pull request dashboard status

Merged · refreshed 2026-09-25 18:42 UTC

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