Class SpannerGrpc.SpannerBlockingStub (6.25.1)

Stay organized with collections Save and categorize content based on your preferences.
public static final class SpannerGrpc.SpannerBlockingStub extends AbstractBlockingStub<SpannerGrpc.SpannerBlockingStub>

Cloud Spanner API The Cloud Spanner API can be used to manage sessions and execute transactions on data stored in Cloud Spanner databases.

Inheritance

java.lang.Object > io.grpc.stub.AbstractStub > io.grpc.stub.AbstractBlockingStub > SpannerGrpc.SpannerBlockingStub

Methods

batchCreateSessions(BatchCreateSessionsRequest request)

public BatchCreateSessionsResponse batchCreateSessions(BatchCreateSessionsRequest request)

Creates multiple new sessions. This API can be used to initialize a session cache on the clients. See https://goo.gl/TgSFN2 for best practices on session cache management.

Parameter
NameDescription
requestBatchCreateSessionsRequest
Returns
TypeDescription
BatchCreateSessionsResponse

beginTransaction(BeginTransactionRequest request)

public Transaction beginTransaction(BeginTransactionRequest request)

Begins a new transaction. This step can often be skipped: Read, ExecuteSql and Commit can begin a new transaction as a side-effect.

Parameter
NameDescription
requestBeginTransactionRequest
Returns
TypeDescription
Transaction

build(Channel channel, CallOptions callOptions)

protected SpannerGrpc.SpannerBlockingStub build(Channel channel, CallOptions callOptions)
Parameters
NameDescription
channelio.grpc.Channel
callOptionsio.grpc.CallOptions
Returns
TypeDescription
SpannerGrpc.SpannerBlockingStub
Overrides
io.grpc.stub.AbstractStub.build(io.grpc.Channel,io.grpc.CallOptions)

commit(CommitRequest request)

public CommitResponse commit(CommitRequest request)

Commits a transaction. The request includes the mutations to be applied to rows in the database. Commit might return an ABORTED error. This can occur at any time; commonly, the cause is conflicts with concurrent transactions. However, it can also happen for a variety of other reasons. If Commit returns ABORTED, the caller should re-attempt the transaction from the beginning, re-using the same session. On very rare occasions, Commit might return UNKNOWN. This can happen, for example, if the client job experiences a 1+ hour networking failure. At that point, Cloud Spanner has lost track of the transaction outcome and we recommend that you perform another read from the database to see the state of things as they are now.

Parameter
NameDescription
requestCommitRequest
Returns
TypeDescription
CommitResponse

createSession(CreateSessionRequest request)

public Session createSession(CreateSessionRequest request)

Creates a new session. A session can be used to perform transactions that read and/or modify data in a Cloud Spanner database. Sessions are meant to be reused for many consecutive transactions. Sessions can only execute one transaction at a time. To execute multiple concurrent read-write/write-only transactions, create multiple sessions. Note that standalone reads and queries use a transaction internally, and count toward the one transaction limit. Active sessions use additional server resources, so it is a good idea to delete idle and unneeded sessions. Aside from explicit deletes, Cloud Spanner may delete sessions for which no operations are sent for more than an hour. If a session is deleted, requests to it return NOT_FOUND. Idle sessions can be kept alive by sending a trivial SQL query periodically, e.g., "SELECT 1".

Parameter
NameDescription
requestCreateSessionRequest
Returns
TypeDescription
Session

deleteSession(DeleteSessionRequest request)

public Empty deleteSession(DeleteSessionRequest request)

Ends a session, releasing server resources associated with it. This will asynchronously trigger cancellation of any operations that are running with this session.

Parameter
NameDescription
requestDeleteSessionRequest
Returns
TypeDescription
Empty

executeBatchDml(ExecuteBatchDmlRequest request)

public ExecuteBatchDmlResponse executeBatchDml(ExecuteBatchDmlRequest request)

Executes a batch of SQL DML statements. This method allows many statements to be run with lower latency than submitting them sequentially with ExecuteSql. Statements are executed in sequential order. A request can succeed even if a statement fails. The ExecuteBatchDmlResponse.status field in the response provides information about the statement that failed. Clients must inspect this field to determine whether an error occurred. Execution stops after the first failed statement; the remaining statements are not executed.

Parameter
NameDescription
requestExecuteBatchDmlRequest
Returns
TypeDescription
ExecuteBatchDmlResponse

executeSql(ExecuteSqlRequest request)

public ResultSet executeSql(ExecuteSqlRequest request)

Executes an SQL statement, returning all results in a single reply. This method cannot be used to return a result set larger than 10 MiB; if the query yields more data than that, the query fails with a FAILED_PRECONDITION error. Operations inside read-write transactions might return ABORTED. If this occurs, the application should restart the transaction from the beginning. See Transaction for more details. Larger result sets can be fetched in streaming fashion by calling ExecuteStreamingSql instead.

Parameter
NameDescription
requestExecuteSqlRequest
Returns
TypeDescription
ResultSet

executeStreamingSql(ExecuteSqlRequest request)

public Iterator<PartialResultSet> executeStreamingSql(ExecuteSqlRequest request)

Like ExecuteSql, except returns the result set as a stream. Unlike ExecuteSql, there is no limit on the size of the returned result set. However, no individual row in the result set can exceed 100 MiB, and no column value can exceed 10 MiB.

Parameter
NameDescription
requestExecuteSqlRequest
Returns
TypeDescription
Iterator<PartialResultSet>

getSession(GetSessionRequest request)

public Session getSession(GetSessionRequest request)

Gets a session. Returns NOT_FOUND if the session does not exist. This is mainly useful for determining whether a session is still alive.

Parameter
NameDescription
requestGetSessionRequest
Returns
TypeDescription
Session

listSessions(ListSessionsRequest request)

public ListSessionsResponse listSessions(ListSessionsRequest request)

Lists all sessions in a given database.

Parameter
NameDescription
requestListSessionsRequest
Returns
TypeDescription
ListSessionsResponse

partitionQuery(PartitionQueryRequest request)

public PartitionResponse partitionQuery(PartitionQueryRequest request)

Creates a set of partition tokens that can be used to execute a query operation in parallel. Each of the returned partition tokens can be used by ExecuteStreamingSql to specify a subset of the query result to read. The same session and read-only transaction must be used by the PartitionQueryRequest used to create the partition tokens and the ExecuteSqlRequests that use the partition tokens. Partition tokens become invalid when the session used to create them is deleted, is idle for too long, begins a new transaction, or becomes too old. When any of these happen, it is not possible to resume the query, and the whole operation must be restarted from the beginning.

Parameter
NameDescription
requestPartitionQueryRequest
Returns
TypeDescription
PartitionResponse

partitionRead(PartitionReadRequest request)

public PartitionResponse partitionRead(PartitionReadRequest request)

Creates a set of partition tokens that can be used to execute a read operation in parallel. Each of the returned partition tokens can be used by StreamingRead to specify a subset of the read result to read. The same session and read-only transaction must be used by the PartitionReadRequest used to create the partition tokens and the ReadRequests that use the partition tokens. There are no ordering guarantees on rows returned among the returned partition tokens, or even within each individual StreamingRead call issued with a partition_token. Partition tokens become invalid when the session used to create them is deleted, is idle for too long, begins a new transaction, or becomes too old. When any of these happen, it is not possible to resume the read, and the whole operation must be restarted from the beginning.

Parameter
NameDescription
requestPartitionReadRequest
Returns
TypeDescription
PartitionResponse

read(ReadRequest request)

public ResultSet read(ReadRequest request)

Reads rows from the database using key lookups and scans, as a simple key/value style alternative to ExecuteSql. This method cannot be used to return a result set larger than 10 MiB; if the read matches more data than that, the read fails with a FAILED_PRECONDITION error. Reads inside read-write transactions might return ABORTED. If this occurs, the application should restart the transaction from the beginning. See Transaction for more details. Larger result sets can be yielded in streaming fashion by calling StreamingRead instead.

Parameter
NameDescription
requestReadRequest
Returns
TypeDescription
ResultSet

rollback(RollbackRequest request)

public Empty rollback(RollbackRequest request)

Rolls back a transaction, releasing any locks it holds. It is a good idea to call this for any transaction that includes one or more Read or ExecuteSql requests and ultimately decides not to commit. Rollback returns OK if it successfully aborts the transaction, the transaction was already aborted, or the transaction is not found. Rollback never returns ABORTED.

Parameter
NameDescription
requestRollbackRequest
Returns
TypeDescription
Empty

streamingRead(ReadRequest request)

public Iterator<PartialResultSet> streamingRead(ReadRequest request)

Like Read, except returns the result set as a stream. Unlike Read, there is no limit on the size of the returned result set. However, no individual row in the result set can exceed 100 MiB, and no column value can exceed 10 MiB.

Parameter
NameDescription
requestReadRequest
Returns
TypeDescription
Iterator<PartialResultSet>