Returns the command's operation ID

# MongoDB\Driver\Monitoring\CommandStartedEvent::getOperationId

(mongodb >=1.3.0)

MongoDB\Driver\Monitoring\CommandStartedEvent::getOperationId — Returns the command's operation ID

### 説明

final public MongoDB\Driver\Monitoring\CommandStartedEvent::getOperationId ( void ) : string

The operation ID is generated by the driver and may be used to link events together such as bulk write operations, which may have been split across several commands at the protocol level.

> 注意: Since multiple commands may share the same operation ID, it is not reliable to use this value to associate event objects with each other. The request ID returned by MongoDB\Driver\Monitoring\CommandStartedEvent::getRequestId() should be used instead.

### パラメータ

この関数にはパラメータはありません。

### 返り値

Returns the command's operation ID.

### エラー / 例外

- 引数のパースに失敗した場合に MongoDB\Driver\Exception\InvalidArgumentException をスローします。

### 参考

- MongoDB\Driver\Monitoring\CommandFailedEvent::getOperationId() - Returns the command's operation ID
- MongoDB\Driver\Monitoring\CommandSucceededEvent::getOperationId() - Returns the command's operation ID
- MongoDB\Driver\Monitoring\CommandStartedEvent::getRequestId() - Returns the command's request ID
- Application Performance Monitoring (APM)