MONGOC_CLIENT_POOL_SET_APPNAME(3)

💅 MONGOC_CLIENT_POOL_SET_APPNAME 💅

okay so bestie, this one is from the libmongoc manual (like, the C driver for MongoDB, iykyk) and honestly it's giving "tiny function, big responsibilities." it's mongoc_client_pool_set_appname(), and yes it does exactly what it sounds like ✨

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🌸 SYNOPSIS 🌸

bool
mongoc_client_pool_set_appname (mongoc_client_pool_t *pool, const char *appname)

so here's the tea 🍓 — this function is literally identical to mongoc_client_set_appname() except it's for client pools instead of a single client. same energy, pool edition, no cap.

also, super important side note: mongoc_client_set_appname() cannot be called on a client that you got from a client pool. like, don't even try it, that's not the vibe 🙈. set it on the pool before you pop clients out, periodt.

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🎀 PARAMETERS 🎀

• pool — a mongoc_client_pool_t. the pool in question, the main character of this whole operation 👑
• appname — the application name, and it can be at most MONGOC_HANDSHAKE_APPNAME_MAX in length. that's your character limit, bestie, respect the limit 💀

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⭐ RETURNS ⭐

returns true if appname was set — slay, it worked 🎉

but if appname is too long, it returns false and logs an error. so if you see a false coming back, that's your sign the string was over the line and it did not go through 😭

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🦋 THREAD SAFETY 🦋

okay listen closely because this is the part that matters 🫶

this function can only be called once on a pool, and it must be called before the first call to mongoc_client_pool_pop().

so like… set the name first, then do the popping. not the other way around. fr fr, the order is not flexible 💅

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🌈 AUTHOR 🌈

MongoDB, Inc — yeah, them. the whole thing is their doing 🙌

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💖 COPYRIGHT 💖

2009-present, MongoDB, Inc. — iconic behavior, honestly, owning it since 2009 ⭐

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okay that's the whole page, bestie! and for the cute little sign-off: this is from libmongoc version 2.5.6, dated Oct 09, 2026, and you can find it filed under MONGOC_CLIENT_POOL_SET_APPNAME(3) 🧚‍♀️ go set that app name and go off 💜