MongoDB\Driver\Session::startTransaction

(mongodb >=1.5.0)

MongoDB\Driver\Session::startTransaction — Starts a transaction

说明

final public MongoDB\Driver\Session::startTransaction(?array $options = null): void

Starts a multi-document transaction associated with the session. At any given time, you can have at most one open transaction for a session. After starting a transaction, the session object must be passed to each operation via the "session" option (e.g. MongoDB\Driver\Manager::executeBulkWrite()) in order to associate that operation with the transaction.

Transactions can be committed through MongoDB\Driver\Session::commitTransaction(), and aborted with MongoDB\Driver\Session::abortTransaction(). Transactions are also automatically aborted when the session is closed from garbage collection or by explicitly calling MongoDB\Driver\Session::endSession().

参数

options

Options can be passed as argument to this method. Each element in this options array overrides the corresponding option from the "defaultTransactionOptions" option, if set when starting the session with MongoDB\Driver\Manager::startSession().

**options**
Option	Type	Description
maxCommitTimeMS	integer	The maximum amount of time in milliseconds to allow a single `commitTransaction` command to run. If specified, `maxCommitTimeMS` must be a signed 32-bit integer greater than or equal to zero.
readConcern	MongoDB\Driver\ReadConcern	A read concern to apply to the operation. This option is available in MongoDB 3.2+ and will result in an exception at execution time if specified for an older server version.
readPreference	MongoDB\Driver\ReadPreference	A read preference to use for selecting a server for the operation.
writeConcern	MongoDB\Driver\WriteConcern	A write concern to apply to the operation.

返回值

没有返回值。

错误／异常

Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
Throws MongoDB\Driver\Exception\CommandException if the transaction could not be started because of a server-side problem (e.g. a lock could not be obtained).
Throws MongoDB\Driver\Exception\RuntimeException if the transaction could not be started (e.g. a transaction was already started).

更新日志

版本	说明
PECL mongodb 1.6.0	The `"maxCommitTimeMS"` option was added.

参见

MongoDB\Driver\Manager::startSession() - Start a new client session for use with this client
MongoDB\Driver\Session::commitTransaction() - Commits a transaction
MongoDB\Driver\Session::abortTransaction() - Aborts a transaction

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