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());