Class ReadOption (2.17.6)

public abstract class ReadOption implements Serializable

Specifies options for read operations in Datastore, namely getting/fetching entities and running queries.

Inheritance

java.lang.Object > ReadOption

Implements

Serializable

Inherited Members

Object.clone()

Object.equals(Object)

Object.finalize()

Object.getClass()

Object.hashCode()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

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.

Returns
Type	Description
`ReadOption.EventualConsistency`

readTime(Timestamp time)

public static ReadOption.ReadTime readTime(Timestamp time)

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`

Returns
Type	Description
`ReadOption.ReadTime`

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`

Returns
Type	Description
`ReadOption`

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`

Returns
Type	Description
`ReadOption`