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Class ReadOption (2.20.1)
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Version 2.20.1 keyboard_arrow_down
public abstract class ReadOption implements Serializable
Specifies options for read operations in Datastore, namely getting/fetching entities and running
queries.
Static Methods
eventualConsistency()
public static ReadOption.EventualConsistency eventualConsistency()
Returns a ReadOption
that specifies eventual consistency, allowing Datastore to return
stale results from gets, fetches, and ancestor queries.
readTime(Timestamp time)
public static ReadOption.ReadTime readTime(Timestamp time)
Beta
This feature is covered by the Pre-GA Offerings Terms of the Terms of Service. Pre-GA libraries might have limited support, and changes to pre-GA libraries might not be compatible with other pre-GA versions. For more information, see the launch stage descriptions.
Returns a ReadOption
that specifies read time, allowing Datastore to return results
from lookups and queries at a particular timestamp. This feature is currently in private
preview.
Parameter
Name
Description
time
com.google.cloud.Timestamp
transactionId(ByteString transactionId)
public static ReadOption transactionId(ByteString transactionId)
Returns a ReadOption
that specifies transaction id, allowing Datastore to execute a
Query in this transaction.
Parameter
Name
Description
transactionId
ByteString
transactionId(String transactionId)
public static ReadOption transactionId(String transactionId)
Returns a ReadOption
that specifies transaction id, allowing Datastore to execute a
Query in this transaction.
Parameter
Name
Description
transactionId
String
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Last updated 2024-07-09 UTC.
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