Package com.google.cloud.spanner

Class Options

java.lang.Object

com.google.cloud.spanner.Options

All Implemented Interfaces:

Serializable

public final class Options
extends Object
implements Serializable

Specifies options for various spanner operations

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Options.AdminApiOption	Marker interface to mark options applicable to operations in admin API.
static interface	Options.CreateAdminApiOption	Marker interface to mark options applicable to Create operations in admin API.
static interface	Options.CreateUpdateDeleteAdminApiOption	Marker interface to mark options applicable to Create, Update and Delete operations in admin API.
static interface	Options.DeleteAdminApiOption	Marker interface to mark options applicable to Delete operations in admin API.
static interface	Options.ListOption	Marker interface to mark options applicable to list operations in admin API.
static interface	Options.QueryOption	Marker interface to mark options applicable to query operation.
static interface	Options.ReadAndQueryOption	Marker interface to mark options applicable to both Read and Query operations
static interface	Options.ReadOption	Marker interface to mark options applicable to read operation
static interface	Options.ReadQueryUpdateTransactionOption	Marker interface to mark options applicable to Read, Query, Update and Write operations
static enum	Options.RpcPriority	Priority for an RPC invocation.
static interface	Options.TransactionOption	Marker interface to mark options applicable to write operations
static interface	Options.UpdateAdminApiOption	Marker interface to mark options applicable to Update operations in admin API.
static interface	Options.UpdateOption	Marker interface to mark options applicable to update operation.

Method Summary

Modifier and Type	Method	Description
static Options.ReadAndQueryOption	bufferRows(int bufferRows)
static Options.TransactionOption	commitStats()	Specifying this instructs the transaction to request CommitStats from the backend.
static com.google.cloud.spanner.Options.DataBoostQueryOption	dataBoostEnabled(Boolean dataBoostEnabled)	If this is for PartitionedRead or PartitionedQuery and this field is set to `true`, the request will be executed via Spanner independent compute resources.
boolean	equals(Object o)
static Options.DeleteAdminApiOption	etag(String etag)	Specifying this will help in optimistic concurrency control as a way to help prevent simultaneous deletes of an instance config from overwriting each other.
static Options.ListOption	filter(String filter)	Specifying this will cause the given filter to be applied to the list operation.
int	hashCode()
static Options.ReadOption	limit(long limit)	Specifying this will cause the read to yield at most this many rows.
static Options.TransactionOption	optimisticLock()	Specifying this instructs the transaction to request Optimistic Lock from the backend.
static Options.ListOption	pageSize(int pageSize)	Specifying this will cause the list operations to fetch at most this many records in a page.
static Options.ListOption	pageToken(String pageToken)	Specifying this will cause the list operation to start fetching the record from this onwards.
static Options.ReadAndQueryOption	prefetchChunks(int prefetchChunks)	Specifying this will allow the client to prefetch up to prefetchChunks PartialResultSet chunks for read and query.
static Options.ReadQueryUpdateTransactionOption	priority(Options.RpcPriority priority)	Specifies the priority to use for the RPC.
static Options.ReadQueryUpdateTransactionOption	tag(String name)	Specifying this will cause the reads, queries, updates and writes operations statistics collection to be grouped by tag.
String	toString()
static Options.CreateUpdateDeleteAdminApiOption	validateOnly(Boolean validateOnly)	Specifying this will not actually execute a request, and provide the same response.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Details

commitStats

public static Options.TransactionOption commitStats()

Specifying this instructs the transaction to request CommitStats from the backend.

optimisticLock

public static Options.TransactionOption optimisticLock()

Specifying this instructs the transaction to request Optimistic Lock from the backend. In this concurrency mode, operations during the execution phase, i.e., reads and queries, are performed without acquiring locks, and transactional consistency is ensured by running a validation process in the commit phase (when any needed locks are acquired). The validation process succeeds only if there are no conflicting committed transactions (that committed mutations to the read data at a commit timestamp after the read timestamp).

limit

public static Options.ReadOption limit(long limit)

Specifying this will cause the read to yield at most this many rows. This should be greater than 0.

prefetchChunks

public static Options.ReadAndQueryOption prefetchChunks(int prefetchChunks)

Specifying this will allow the client to prefetch up to prefetchChunks PartialResultSet chunks for read and query. The data size of each chunk depends on the server implementation but a good rule of thumb is that each chunk will be up to 1 MiB. Larger values reduce the likelihood of blocking while consuming results at the cost of greater memory consumption. prefetchChunks should be greater than 0. To get good performance choose a value that is large enough to allow buffering of chunks for an entire row. Apart from the buffered chunks, there can be at most one more row buffered in the client.

bufferRows

public static Options.ReadAndQueryOption bufferRows(int bufferRows)

priority

public static Options.ReadQueryUpdateTransactionOption priority(Options.RpcPriority priority)

Specifies the priority to use for the RPC.

tag

public static Options.ReadQueryUpdateTransactionOption tag(String name)

Specifying this will cause the reads, queries, updates and writes operations statistics collection to be grouped by tag.

pageSize

public static Options.ListOption pageSize(int pageSize)

Specifying this will cause the list operations to fetch at most this many records in a page.

dataBoostEnabled

public static com.google.cloud.spanner.Options.DataBoostQueryOption dataBoostEnabled(Boolean dataBoostEnabled)

If this is for PartitionedRead or PartitionedQuery and this field is set to `true`, the request will be executed via Spanner independent compute resources.

pageToken

public static Options.ListOption pageToken(String pageToken)

Specifying this will cause the list operation to start fetching the record from this onwards.

filter

public static Options.ListOption filter(String filter)

Specifying this will cause the given filter to be applied to the list operation. List operations that support this options are:

• InstanceAdminClient.listInstances(com.google.cloud.spanner.Options.ListOption...)

If this option is passed to any other list operation, it will throw an IllegalArgumentException.

Parameters:

filter - An expression for filtering the results of the request. Filter rules are case insensitive. Some examples of using filters are:

• name:* The entity has a name.
• name:Howl The entity's name contains "howl".
• name:HOWL Equivalent to above.
• NAME:howl Equivalent to above.
• labels.env:* The entity has the label env.
• labels.env:dev The entity has a label env whose value contains "dev".
• name:howl labels.env:dev The entity's name contains "howl" and it has the label env whose value contains "dev".

etag

public static Options.DeleteAdminApiOption etag(String etag)

Specifying this will help in optimistic concurrency control as a way to help prevent simultaneous deletes of an instance config from overwriting each other. Operations that support this option are:

• InstanceAdminClient.deleteInstanceConfig(java.lang.String, com.google.cloud.spanner.Options.DeleteAdminApiOption...)

validateOnly

public static Options.CreateUpdateDeleteAdminApiOption validateOnly(Boolean validateOnly)

Specifying this will not actually execute a request, and provide the same response. Operations that support this option are:

• InstanceAdminClient.createInstanceConfig(com.google.cloud.spanner.InstanceConfigInfo, com.google.cloud.spanner.Options.CreateAdminApiOption...)
• InstanceAdminClient.updateInstanceConfig(com.google.cloud.spanner.InstanceConfigInfo, java.lang.Iterable<com.google.cloud.spanner.InstanceConfigInfo.InstanceConfigField>, com.google.cloud.spanner.Options.UpdateAdminApiOption...)
• InstanceAdminClient.deleteInstanceConfig(java.lang.String, com.google.cloud.spanner.Options.DeleteAdminApiOption...)

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object