Mongo client bulkwrite - #2885
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…nitoring, primary write-routing Reworks the MongoDB driver onto a Server Discovery and Monitoring (SDAM) foundation: single-pass topology discovery, background health monitoring, writes routed to the primary, per-query read preferences, and read-preference tag server selection. Adds the wire/codec and topology infrastructure (serverdescription, monitor, wire, wireversion, compression, commands, clustertime) and reworks connection/client/collection/database/cursor onto it. Base of a stacked series: client sessions, multi-document transactions and retryable writes follow in the next PR, and the self-contained MongoDB 8 features (change streams, client bulkWrite, GridFS, CSFLE, Stable API, mongodb+srv, load-balancer mode) as PRs on top of that. Closes vibe-d#2845, vibe-d#2847, vibe-d#2848, vibe-d#2849, vibe-d#2851
…writes Adds client session support (logical session ids backed by a server session pool), multi-document transactions (start/commit/abort), and retryable writes — including write retry when the primary steps down — on top of the SDAM core. Stacked on mongo-driver-core-improvements. Closes vibe-d#2850, vibe-d#2854, vibe-d#2855, vibe-d#2856
Adds change streams via watch() on MongoClient (whole deployment), MongoDatabase (all collections), and MongoCollection. The returned ChangeStream input range tracks resume tokens and automatically resumes on transient/resumable errors; requires a replica set or sharded cluster. Stacked on mongo-sessions-and-transactions. Closes vibe-d#2860
Adds MongoClient.bulkWrite() — the MongoDB 8.0 server-level bulkWrite command spanning multiple collections and databases in a single request. Builds the command, drains the result cursor via getMore (killing it on a mid-drain failure), and parses the summary plus per-operation verbose results; honours ordered/verboseResults/writeConcern and surfaces partial results on error. Stacked on mongo-change-streams. Closes vibe-d#2861
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Hey @s-ludwig! This builds on the change-streams PR and adds the MongoDB 8.0 server-level bulkWrite command.
It introduces MongoClient.bulkWrite(), which runs inserts, updates, replaces, and deletes across multiple collections and databases in a single request. It builds the command, drains the result cursor with getMore (and kills the cursor if draining fails partway, so the server isn't left holding an orphan), and parses both the summary counts and the per-operation verbose results. It honours ordered, verboseResults, and writeConcern, and surfaces partial results when individual operations fail. Requires a MongoDB 8.0+ server.
It's stacked on mongo-change-streams, so please review that one first; the diff here is just the bulkWrite feature (one new module, the client method, and an integration test).
Builds clean and all unit tests pass.
Closes #2861
Merge after #2860
Thanks for taking a look!