feat(sdk): support custom summaryGenerator in map and parallel config#696
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ParallelConfig and MapConfig now expose an optional summaryGenerator, which the parallel and map handlers forward to executeConcurrently instead of always using the internal default. The default generator is still used when none is supplied, so existing behavior is unchanged (backward compatible). The summary is used as the checkpointed payload when a batch result exceeds the checkpoint size limit (ReplayChildren mode). Adds handler unit tests asserting the user-provided generator is forwarded (and the default is used otherwise), plus an integration example under aws-durable-execution-sdk-js-examples that verifies the custom summary is checkpointed for a large parallel result. Closes #500
ParidelPooya
marked this pull request as ready for review
July 7, 2026 21:39
ayushiahjolia
approved these changes
Jul 7, 2026
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ParallelConfig and MapConfig now expose an optional summaryGenerator, which the parallel and map handlers forward to executeConcurrently instead of always using the internal default. The default generator is still used when none is supplied, so existing behavior is unchanged (backward compatible).
The summary is used as the checkpointed payload when a batch result exceeds the checkpoint size limit (ReplayChildren mode).
Adds handler unit tests asserting the user-provided generator is forwarded (and the default is used otherwise), plus an integration example under aws-durable-execution-sdk-js-examples that verifies the custom summary is checkpointed for a large parallel result.
Issue #, if available: #500
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