Phase 5: large-file / streaming processing - #5
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Large_File_Processing/: constant-memory FundsXML processing. - make_large_sample.py: streaming WRITER -> big XSD-valid file - stream_aggregate.py (lxml iterparse) + StreamAggregate.java (StAX, native, no JAXB/DOM): identical totals at flat memory (verified ~16 MiB / ~2 MiB for 20k positions, size-independent) - split.py: split into independently XSD-valid chunks - delta_diff.py: INITIAL-vs-DELTA position diff (added/removed/changed), exit 1 on differences All verified locally. CI gains a step that generates a 30k-position file, stream-aggregates (Python+Java, totals asserted), splits + XSD-validates a chunk, and runs an identical-input delta (exit 0). Top-level index updated. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Phase 5 of the enterprise FundsXML showcase. Based on PR #4's branch so the diff is Phase 5 only.
Added —
Large_File_Processing/Constant-memory FundsXML processing (verified: ~16 MiB RSS Python / ~2 MiB heap Java for 20k positions, size-independent):
make_large_sample.py— streaming writer → big XSD-valid filestream_aggregate.py(lxmliterparse, clears parsed siblings) +StreamAggregate.java(StAX pull parser, native Java, no JAXB/DOM) — identical totals at flat memorysplit.py— split into independently XSD-valid chunksdelta_diff.py— INITIAL-vs-DELTA position diff (added/removed/changed; exit 1 on differences)All verified locally. CI gains a step: generate a 30k-position file → stream-aggregate (Python+Java, totals asserted) → split + XSD-validate a chunk → identical-input delta (exit 0). README includes an ETL (Camel/NiFi) integration note. Top-level index → ✅.
Roadmap remaining: Phase 6 data binding / JSON (final phase).
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