feat(trace-utils): add v1-native JSON log encoder brick - #2371
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anais-raison wants to merge 6 commits into
Open
feat(trace-utils): add v1-native JSON log encoder brick#2371anais-raison wants to merge 6 commits into
anais-raison wants to merge 6 commits into
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Isolated brick for APMSP-2812: adds a v1::Span-native JSON log encoder (span_v1.rs) alongside the existing v0.4 one, plus write_log_traces_v1 in log_writer.rs. Not wired into any live send path yet.
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📚 Documentation Check Results📦
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Contributor
🔒 Cargo Deny Results📦
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BenchmarksComparisonBenchmark execution time: 2026-09-01 13:03:41 Comparing candidate commit 946a530 in PR branch Found 14 performance improvements and 11 performance regressions! Performance is the same for 115 metrics, 0 unstable metrics.
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Artifact Size Benchmark Reportaarch64-alpine-linux-musl
aarch64-unknown-linux-gnu
libdatadog-x64-windows
libdatadog-x86-windows
x86_64-alpine-linux-musl
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anais-raison
marked this pull request as ready for review
August 20, 2026 12:13
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| let merged_attrs = span_attrs_dd | ||
| .iter() | ||
| .filter(|(k, _)| !PROMOTED_ATTR_KEYS.contains(&(*k).borrow())) | ||
| .chain(chunk.attrs_dd.iter().filter(|(k, _)| { | ||
| !PROMOTED_ATTR_KEYS.contains(&(*k).borrow()) | ||
| && !span_attrs_dd.iter().any(|(k2, _)| k2 == *k) | ||
| })) | ||
| .chain(chunk.payload_attrs_dd.iter().filter(|(k, _)| { | ||
| !PROMOTED_ATTR_KEYS.contains(&(*k).borrow()) | ||
| && !span_attrs_dd.iter().any(|(k2, _)| k2 == *k) | ||
| && !chunk.attrs_dd.iter().any(|(k2, _)| k2 == *k) | ||
| })); |
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Approved with the reserve that this should be removed at the same time as the one for the agentless JSON encoder and we should do a promotion pass before encoding
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What does this PR do?
Adds a v1-native equivalent of the existing v0.4 JSON log encoder, as groundwork for making
v1::Span/v1::TraceChunkthe exporter's canonical internal type:json_log_encoder::span_v1+encode_traces_v1(libdd-trace-utils)write_log_traces_v1(libdd-data-pipeline)Nothing is wired into the live pipeline yet.
Motivation
Part of APMSP-2812: migration of the exporter from v0.4 to v1 with isolated bricks first before one final breaking PR that will handle the actual swap.
Additional Notes
Pure addition, no behavior change — these functions aren't called anywhere yet, so there's no regression risk.