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docs(NODE-6191): clarify that operations should not be parallelized in transactions #4122

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merged 3 commits into from
May 28, 2024
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docs(NODE-6191): clarify that operations should not be parallelized in transactions #4122

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docs(NODE-6191): clarify that operations should not be parallelized i…
W-A-James May 28, 2024
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update doc comment
W-A-James May 28, 2024
1b1ed09
Update src/sessions.ts
W-A-James May 28, 2024
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10 changes: 10 additions & 0 deletions src/sessions.ts
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Expand Up @@ -369,6 +369,11 @@ export class ClientSession extends TypedEventEmitter<ClientSessionEvents> {
/**
* Starts a new transaction with the given options.
*
* @remarks
* **IMPORTANT**: Running operations in parallel is not supported during a transaction. The use of `Promise.all`,
* `Promise.allSettled`, `Promise.race`, etc to parallelize operations inside a transaction is
* undefined behaviour.
*
* @param options - Options for the transaction
*/
startTransaction(options?: TransactionOptions): void {
Expand Down Expand Up @@ -443,6 +448,11 @@ export class ClientSession extends TypedEventEmitter<ClientSessionEvents> {
*
* **IMPORTANT:** This method requires the function passed in to return a Promise. That promise must be made by `await`-ing all operations in such a way that rejections are propagated to the returned promise.
*
* **IMPORTANT:** Running operations in parallel is not supported during a transaction. The use of `Promise.all`,
* `Promise.allSettled`, `Promise.race`, etc to parallelize operations inside a transaction is
* undefined behaviour.
*
*
* @remarks
* - If all operations successfully complete and the `commitTransaction` operation is successful, then the provided function will return the result of the provided function.
* - If the transaction is unable to complete or an error is thrown from within the provided function, then the provided function will throw an error.
Expand Down