public class BatchClientImpl implements BatchClient
Default implementation for Batch Client interface.
Implements
BatchClientMethods
batchReadOnlyTransaction(BatchTransactionId batchTransactionId)
public BatchReadOnlyTransaction batchReadOnlyTransaction(BatchTransactionId batchTransactionId)
Returns a BatchReadOnlyTransaction context in which multiple reads and/or queries can be performed. This is a non-blocking method. All reads/queries will use the same timestamp, and the timestamp can be inspected after this transaction is created successfully.
This method is useful to recreate a BatchReadOnlyTransaction object from an existing batchTransactionId. For example one might send the transaction id to a different process or machine and recreate the transaction object there.
Parameter | |
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Name | Description |
batchTransactionId | BatchTransactionId |
Returns | |
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Type | Description |
BatchReadOnlyTransaction |
batchReadOnlyTransaction(TimestampBound bound)
public BatchReadOnlyTransaction batchReadOnlyTransaction(TimestampBound bound)
Returns a BatchReadOnlyTransaction context in which multiple reads and/or queries can be performed. All reads/queries will use the same timestamp, and the timestamp can be inspected after this transaction is created successfully. This is a blocking method since it waits to finish the rpcs.
Note that the bounded staleness modes, TimestampBound.Mode#MIN_READ_TIMESTAMP and TimestampBound.Mode#MAX_STALENESS, are not supported for BatchReadOnlyTransaction.
Parameter | |
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Name | Description |
bound | TimestampBound |
Returns | |
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Type | Description |
BatchReadOnlyTransaction |
getDatabaseRole()
public String getDatabaseRole()
Returns the DatabaseRole used by the client connection. The database role that is used determines the access permissions that a connection has. This can for example be used to create connections that are only permitted to access certain tables.
Returns | |
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Type | Description |
String |