Session
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Definition定义
Session
-
The Session object for the connection inmongosh
.mongosh
中连接的Session对象。To instantiate a session for the connection in要在mongosh
, seeMongo.startSession()
.mongosh
中为连接实例化会话,请参阅Mongo.startSession()
。For more information on sessions, see Client Sessions and Causal Consistency Guarantees.有关会话的更多信息,请参阅客户端会话和因果一致性保证。General Session Methods常规会话方法Method方法Description描述Session.advanceClusterTime({ clusterTime: <timestamp>, signature: { hash: <BinData>, keyId: <NumberLong> } })
Updates the cluster time tracked by the session.更新会话跟踪的群集时间。Session.advanceOperationTime(<timestamp>)
Updates the operation time.更新操作时间。Session.endSession()
Ends the session.结束会话。Session.getClusterTime()
Returns the most recent cluster time as seen by the session.返回会话看到的最近的群集时间。Applicable for replica sets and sharded clusters only.仅适用于复制集和分片集群。Session.getDatabase(<database>)
Access the specified database from the session in从mongosh
.mongosh
中的会话访问指定的数据库。Session.getOptions()
Access the options for the session. For the available options, see访问会话的选项。有关可用选项,请参阅SessionOptions()
.SessionOptions()
。Session.getOperationTime()
Returns the timestamp of the last acknowledged operation for the session.返回会话最后一次确认操作的时间戳。Session.hasEnded()
Returns a boolean that specifies whether the session has ended.返回一个布尔值,用于指定会话是否已结束。Session Methods for Transactions事务的会话方法Method方法Description描述Session.abortTransaction()
Aborts the session's transaction.中止会话的事务。For details, see有关详细信息,请参阅Session.abortTransaction()
.Session.abortTransaction()
。Session.commitTransaction()
Commits the session's transaction. For details, see提交会话的事务。有关详细信息,请参阅Session.commitTransaction()
.Session.commitTransaction()
。Session.startTransaction()
Starts a multi-document transaction for the session.启动会话的多文档事务。For details, see有关详细信息,请参阅Session.startTransaction()
.Session.startTransaction()
。Session.withTransaction()
Runs a specified lambda function within a transaction.在事务中运行指定的lambda函数。For details, see有关详细信息,请参阅Session.withTransaction()
.Session.withTransaction()
。
Example实例
The following example starts a session on the 以下示例在与Mongo()
connection object associated with mongosh
's global db
variable, and then uses the Session.getDatabase()
method to retrieve the database object associated with the session.mongosh
的全局db
变量关联的Mongo()
连接对象上启动会话,然后使用Session.getDatabase()
方法检索与会话关联的数据库对象。
var session = db.getMongo().startSession();
db = session.getDatabase(db.getName());