SpannerClient (Google Cloud Spanner 6.17.3 API)

java.lang.Object
- com.google.cloud.spanner.v1.SpannerClient

All Implemented Interfaces:

com.google.api.gax.core.BackgroundResource, AutoCloseable
```
@Generated(value="by gapic-generator-java")
public class SpannerClient
extends Object
implements com.google.api.gax.core.BackgroundResource
```
Service Description: Cloud Spanner API
The Cloud Spanner API can be used to manage sessions and execute transactions on data stored in Cloud Spanner databases.
This class provides the ability to make remote calls to the backing service through method calls that map to API methods. Sample code to get started:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   DatabaseName database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]");
   Session response = spannerClient.createSession(database);
 }
 
```
Note: close() needs to be called on the SpannerClient object to clean up resources such as threads. In the example above, try-with-resources is used, which automatically calls close().
The surface of this class includes several types of Java methods for each of the API's methods:
1. A "flattened" method. With this type of method, the fields of the request type have been converted into function parameters. It may be the case that not all fields are available as parameters, and not every API method will have a flattened method entry point.
2. A "request object" method. This type of method only takes one parameter, a request object, which must be constructed before the call. Not every API method will have a request object method.
3. A "callable" method. This type of method takes no parameters and returns an immutable API callable object, which can be used to initiate calls to the service.
See the individual methods for example code.
Many parameters require resource names to be formatted in a particular way. To assist with these names, this class includes a format method for each type of name, and additionally a parse method to extract the individual identifiers contained within names that are returned.
This class can be customized by passing in a custom instance of SpannerSettings to create(). For example:
To customize credentials:
```
 SpannerSettings spannerSettings =
     SpannerSettings.newBuilder()
         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
         .build();
 SpannerClient spannerClient = SpannerClient.create(spannerSettings);
 
```
To customize the endpoint:
```
 SpannerSettings spannerSettings = SpannerSettings.newBuilder().setEndpoint(myEndpoint).build();
 SpannerClient spannerClient = SpannerClient.create(spannerSettings);
 
```
Please refer to the GitHub repository's samples for more quickstart code snippets.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`SpannerClient.ListSessionsFixedSizeCollection`
`static class`	`SpannerClient.ListSessionsPage`
`static class`	`SpannerClient.ListSessionsPagedResponse`

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`SpannerClient(SpannerSettings settings)` Constructs an instance of SpannerClient, using the given settings.
`protected`	`SpannerClient(SpannerStub stub)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`awaitTermination(long duration, TimeUnit unit)`
`BatchCreateSessionsResponse`	`batchCreateSessions(BatchCreateSessionsRequest request)` Creates multiple new sessions.
`BatchCreateSessionsResponse`	`batchCreateSessions(DatabaseName database, int sessionCount)` Creates multiple new sessions.
`BatchCreateSessionsResponse`	`batchCreateSessions(String database, int sessionCount)` Creates multiple new sessions.
`com.google.api.gax.rpc.UnaryCallable<BatchCreateSessionsRequest,BatchCreateSessionsResponse>`	`batchCreateSessionsCallable()` Creates multiple new sessions.
`Transaction`	`beginTransaction(BeginTransactionRequest request)` Begins a new transaction.
`Transaction`	`beginTransaction(SessionName session, TransactionOptions options)` Begins a new transaction.
`Transaction`	`beginTransaction(String session, TransactionOptions options)` Begins a new transaction.
`com.google.api.gax.rpc.UnaryCallable<BeginTransactionRequest,Transaction>`	`beginTransactionCallable()` Begins a new transaction.
`void`	`close()`
`CommitResponse`	`commit(CommitRequest request)` Commits a transaction.
`CommitResponse`	`commit(SessionName session, com.google.protobuf.ByteString transactionId, List<Mutation> mutations)` Commits a transaction.
`CommitResponse`	`commit(SessionName session, TransactionOptions singleUseTransaction, List<Mutation> mutations)` Commits a transaction.
`CommitResponse`	`commit(String session, com.google.protobuf.ByteString transactionId, List<Mutation> mutations)` Commits a transaction.
`CommitResponse`	`commit(String session, TransactionOptions singleUseTransaction, List<Mutation> mutations)` Commits a transaction.
`com.google.api.gax.rpc.UnaryCallable<CommitRequest,CommitResponse>`	`commitCallable()` Commits a transaction.
`static SpannerClient`	`create()` Constructs an instance of SpannerClient with default settings.
`static SpannerClient`	`create(SpannerSettings settings)` Constructs an instance of SpannerClient, using the given settings.
`static SpannerClient`	`create(SpannerStub stub)` Constructs an instance of SpannerClient, using the given stub for making calls.
`Session`	`createSession(CreateSessionRequest request)` Creates a new session.
`Session`	`createSession(DatabaseName database)` Creates a new session.
`Session`	`createSession(String database)` Creates a new session.
`com.google.api.gax.rpc.UnaryCallable<CreateSessionRequest,Session>`	`createSessionCallable()` Creates a new session.
`void`	`deleteSession(DeleteSessionRequest request)` Ends a session, releasing server resources associated with it.
`void`	`deleteSession(SessionName name)` Ends a session, releasing server resources associated with it.
`void`	`deleteSession(String name)` Ends a session, releasing server resources associated with it.
`com.google.api.gax.rpc.UnaryCallable<DeleteSessionRequest,com.google.protobuf.Empty>`	`deleteSessionCallable()` Ends a session, releasing server resources associated with it.
`ExecuteBatchDmlResponse`	`executeBatchDml(ExecuteBatchDmlRequest request)` Executes a batch of SQL DML statements.
`com.google.api.gax.rpc.UnaryCallable<ExecuteBatchDmlRequest,ExecuteBatchDmlResponse>`	`executeBatchDmlCallable()` Executes a batch of SQL DML statements.
`ResultSet`	`executeSql(ExecuteSqlRequest request)` Executes an SQL statement, returning all results in a single reply.
`com.google.api.gax.rpc.UnaryCallable<ExecuteSqlRequest,ResultSet>`	`executeSqlCallable()` Executes an SQL statement, returning all results in a single reply.
`com.google.api.gax.rpc.ServerStreamingCallable<ExecuteSqlRequest,PartialResultSet>`	`executeStreamingSqlCallable()` Like [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], except returns the result set as a stream.
`Session`	`getSession(GetSessionRequest request)` Gets a session.
`Session`	`getSession(SessionName name)` Gets a session.
`Session`	`getSession(String name)` Gets a session.
`com.google.api.gax.rpc.UnaryCallable<GetSessionRequest,Session>`	`getSessionCallable()` Gets a session.
`SpannerSettings`	`getSettings()`
`SpannerStub`	`getStub()`
`boolean`	`isShutdown()`
`boolean`	`isTerminated()`
`SpannerClient.ListSessionsPagedResponse`	`listSessions(DatabaseName database)` Lists all sessions in a given database.
`SpannerClient.ListSessionsPagedResponse`	`listSessions(ListSessionsRequest request)` Lists all sessions in a given database.
`SpannerClient.ListSessionsPagedResponse`	`listSessions(String database)` Lists all sessions in a given database.
`com.google.api.gax.rpc.UnaryCallable<ListSessionsRequest,ListSessionsResponse>`	`listSessionsCallable()` Lists all sessions in a given database.
`com.google.api.gax.rpc.UnaryCallable<ListSessionsRequest,SpannerClient.ListSessionsPagedResponse>`	`listSessionsPagedCallable()` Lists all sessions in a given database.
`PartitionResponse`	`partitionQuery(PartitionQueryRequest request)` Creates a set of partition tokens that can be used to execute a query operation in parallel.
`com.google.api.gax.rpc.UnaryCallable<PartitionQueryRequest,PartitionResponse>`	`partitionQueryCallable()` Creates a set of partition tokens that can be used to execute a query operation in parallel.
`PartitionResponse`	`partitionRead(PartitionReadRequest request)` Creates a set of partition tokens that can be used to execute a read operation in parallel.
`com.google.api.gax.rpc.UnaryCallable<PartitionReadRequest,PartitionResponse>`	`partitionReadCallable()` Creates a set of partition tokens that can be used to execute a read operation in parallel.
`ResultSet`	`read(ReadRequest request)` Reads rows from the database using key lookups and scans, as a simple key/value style alternative to [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].
`com.google.api.gax.rpc.UnaryCallable<ReadRequest,ResultSet>`	`readCallable()` Reads rows from the database using key lookups and scans, as a simple key/value style alternative to [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].
`void`	`rollback(RollbackRequest request)` Rolls back a transaction, releasing any locks it holds.
`void`	`rollback(SessionName session, com.google.protobuf.ByteString transactionId)` Rolls back a transaction, releasing any locks it holds.
`void`	`rollback(String session, com.google.protobuf.ByteString transactionId)` Rolls back a transaction, releasing any locks it holds.
`com.google.api.gax.rpc.UnaryCallable<RollbackRequest,com.google.protobuf.Empty>`	`rollbackCallable()` Rolls back a transaction, releasing any locks it holds.
`void`	`shutdown()`
`void`	`shutdownNow()`
`com.google.api.gax.rpc.ServerStreamingCallable<ReadRequest,PartialResultSet>`	`streamingReadCallable()` Like [Read][google.spanner.v1.Spanner.Read], except returns the result set as a stream.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SpannerClient
```
protected SpannerClient(SpannerSettings settings)
                 throws IOException
```
    Constructs an instance of SpannerClient, using the given settings. This is protected so that it is easy to make a subclass, but otherwise, the static factory methods should be preferred.
    
    Throws:
    
    IOException
  - SpannerClient
```
@BetaApi(value="A restructuring of stub classes is planned, so this may break in the future")
protected SpannerClient(SpannerStub stub)
```
- Method Detail
  - create
```
public static final SpannerClient create()
                                  throws IOException
```
    Constructs an instance of SpannerClient with default settings.
    
    Throws:
    
    IOException
  - create
```
public static final SpannerClient create(SpannerSettings settings)
                                  throws IOException
```
    Constructs an instance of SpannerClient, using the given settings. The channels are created based on the settings passed in, or defaults for any settings that are not set.
    
    Throws:
    
    IOException
  - create
```
@BetaApi(value="A restructuring of stub classes is planned, so this may break in the future")
public static final SpannerClient create(SpannerStub stub)
```
    Constructs an instance of SpannerClient, using the given stub for making calls. This is for advanced usage - prefer using create(SpannerSettings).
  - getSettings
```
public final SpannerSettings getSettings()
```
  - getStub
```
@BetaApi(value="A restructuring of stub classes is planned, so this may break in the future")
public SpannerStub getStub()
```
  - createSession
```
public final Session createSession(DatabaseName database)
```
    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"`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   DatabaseName database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]");
   Session response = spannerClient.createSession(database);
 }
 
```
    Parameters:
    
    database - Required. The database in which the new session is created.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - createSession
```
public final Session createSession(String database)
```
    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"`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString();
   Session response = spannerClient.createSession(database);
 }
 
```
    Parameters:
    
    database - Required. The database in which the new session is created.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - createSession
```
public final 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"`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   CreateSessionRequest request =
       CreateSessionRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setSession(Session.newBuilder().build())
           .build();
   Session response = spannerClient.createSession(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - createSessionCallable
```
public final com.google.api.gax.rpc.UnaryCallable<CreateSessionRequest,Session> createSessionCallable()
```
    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"`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   CreateSessionRequest request =
       CreateSessionRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setSession(Session.newBuilder().build())
           .build();
   ApiFuture<Session> future = spannerClient.createSessionCallable().futureCall(request);
   // Do something.
   Session response = future.get();
 }
 
```
  - batchCreateSessions
```
public final BatchCreateSessionsResponse batchCreateSessions(DatabaseName database,
                                                             int sessionCount)
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   DatabaseName database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]");
   int sessionCount = 185691686;
   BatchCreateSessionsResponse response =
       spannerClient.batchCreateSessions(database, sessionCount);
 }
 
```
    Parameters:
    
    database - Required. The database in which the new sessions are created.
    
    sessionCount - Required. The number of sessions to be created in this batch call. The API may return fewer than the requested number of sessions. If a specific number of sessions are desired, the client can make additional calls to BatchCreateSessions (adjusting [session_count][google.spanner.v1.BatchCreateSessionsRequest.session_count] as necessary).
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - batchCreateSessions
```
public final BatchCreateSessionsResponse batchCreateSessions(String database,
                                                             int sessionCount)
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString();
   int sessionCount = 185691686;
   BatchCreateSessionsResponse response =
       spannerClient.batchCreateSessions(database, sessionCount);
 }
 
```
    Parameters:
    
    database - Required. The database in which the new sessions are created.
    
    sessionCount - Required. The number of sessions to be created in this batch call. The API may return fewer than the requested number of sessions. If a specific number of sessions are desired, the client can make additional calls to BatchCreateSessions (adjusting [session_count][google.spanner.v1.BatchCreateSessionsRequest.session_count] as necessary).
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - batchCreateSessions
```
public final 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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   BatchCreateSessionsRequest request =
       BatchCreateSessionsRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setSessionTemplate(Session.newBuilder().build())
           .setSessionCount(185691686)
           .build();
   BatchCreateSessionsResponse response = spannerClient.batchCreateSessions(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - batchCreateSessionsCallable
```
public final com.google.api.gax.rpc.UnaryCallable<BatchCreateSessionsRequest,BatchCreateSessionsResponse> batchCreateSessionsCallable()
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   BatchCreateSessionsRequest request =
       BatchCreateSessionsRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setSessionTemplate(Session.newBuilder().build())
           .setSessionCount(185691686)
           .build();
   ApiFuture<BatchCreateSessionsResponse> future =
       spannerClient.batchCreateSessionsCallable().futureCall(request);
   // Do something.
   BatchCreateSessionsResponse response = future.get();
 }
 
```
  - getSession
```
public final Session getSession(SessionName name)
```
    Gets a session. Returns `NOT_FOUND` if the session does not exist. This is mainly useful for determining whether a session is still alive.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   SessionName name = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]");
   Session response = spannerClient.getSession(name);
 }
 
```
    Parameters:
    
    name - Required. The name of the session to retrieve.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - getSession
```
public final Session getSession(String name)
```
    Gets a session. Returns `NOT_FOUND` if the session does not exist. This is mainly useful for determining whether a session is still alive.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String name = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString();
   Session response = spannerClient.getSession(name);
 }
 
```
    Parameters:
    
    name - Required. The name of the session to retrieve.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - getSession
```
public final 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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   GetSessionRequest request =
       GetSessionRequest.newBuilder()
           .setName(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .build();
   Session response = spannerClient.getSession(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - getSessionCallable
```
public final com.google.api.gax.rpc.UnaryCallable<GetSessionRequest,Session> getSessionCallable()
```
    Gets a session. Returns `NOT_FOUND` if the session does not exist. This is mainly useful for determining whether a session is still alive.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   GetSessionRequest request =
       GetSessionRequest.newBuilder()
           .setName(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .build();
   ApiFuture<Session> future = spannerClient.getSessionCallable().futureCall(request);
   // Do something.
   Session response = future.get();
 }
 
```
  - listSessions
```
public final SpannerClient.ListSessionsPagedResponse listSessions(DatabaseName database)
```
    Lists all sessions in a given database.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   DatabaseName database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]");
   for (Session element : spannerClient.listSessions(database).iterateAll()) {
     // doThingsWith(element);
   }
 }
 
```
    Parameters:
    
    database - Required. The database in which to list sessions.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - listSessions
```
public final SpannerClient.ListSessionsPagedResponse listSessions(String database)
```
    Lists all sessions in a given database.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String database = DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString();
   for (Session element : spannerClient.listSessions(database).iterateAll()) {
     // doThingsWith(element);
   }
 }
 
```
    Parameters:
    
    database - Required. The database in which to list sessions.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - listSessions
```
public final SpannerClient.ListSessionsPagedResponse listSessions(ListSessionsRequest request)
```
    Lists all sessions in a given database.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ListSessionsRequest request =
       ListSessionsRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setPageSize(883849137)
           .setPageToken("pageToken873572522")
           .setFilter("filter-1274492040")
           .build();
   for (Session element : spannerClient.listSessions(request).iterateAll()) {
     // doThingsWith(element);
   }
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - listSessionsPagedCallable
```
public final com.google.api.gax.rpc.UnaryCallable<ListSessionsRequest,SpannerClient.ListSessionsPagedResponse> listSessionsPagedCallable()
```
    Lists all sessions in a given database.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ListSessionsRequest request =
       ListSessionsRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setPageSize(883849137)
           .setPageToken("pageToken873572522")
           .setFilter("filter-1274492040")
           .build();
   ApiFuture<Session> future = spannerClient.listSessionsPagedCallable().futureCall(request);
   // Do something.
   for (Session element : future.get().iterateAll()) {
     // doThingsWith(element);
   }
 }
 
```
  - listSessionsCallable
```
public final com.google.api.gax.rpc.UnaryCallable<ListSessionsRequest,ListSessionsResponse> listSessionsCallable()
```
    Lists all sessions in a given database.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ListSessionsRequest request =
       ListSessionsRequest.newBuilder()
           .setDatabase(DatabaseName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]").toString())
           .setPageSize(883849137)
           .setPageToken("pageToken873572522")
           .setFilter("filter-1274492040")
           .build();
   while (true) {
     ListSessionsResponse response = spannerClient.listSessionsCallable().call(request);
     for (Session element : response.getResponsesList()) {
       // doThingsWith(element);
     }
     String nextPageToken = response.getNextPageToken();
     if (!Strings.isNullOrEmpty(nextPageToken)) {
       request = request.toBuilder().setPageToken(nextPageToken).build();
     } else {
       break;
     }
   }
 }
 
```
  - deleteSession
```
public final void deleteSession(SessionName name)
```
    Ends a session, releasing server resources associated with it. This will asynchronously trigger cancellation of any operations that are running with this session.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   SessionName name = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]");
   spannerClient.deleteSession(name);
 }
 
```
    Parameters:
    
    name - Required. The name of the session to delete.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - deleteSession
```
public final void deleteSession(String name)
```
    Ends a session, releasing server resources associated with it. This will asynchronously trigger cancellation of any operations that are running with this session.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String name = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString();
   spannerClient.deleteSession(name);
 }
 
```
    Parameters:
    
    name - Required. The name of the session to delete.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - deleteSession
```
public final void 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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   DeleteSessionRequest request =
       DeleteSessionRequest.newBuilder()
           .setName(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .build();
   spannerClient.deleteSession(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - deleteSessionCallable
```
public final com.google.api.gax.rpc.UnaryCallable<DeleteSessionRequest,com.google.protobuf.Empty> deleteSessionCallable()
```
    Ends a session, releasing server resources associated with it. This will asynchronously trigger cancellation of any operations that are running with this session.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   DeleteSessionRequest request =
       DeleteSessionRequest.newBuilder()
           .setName(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .build();
   ApiFuture<Empty> future = spannerClient.deleteSessionCallable().futureCall(request);
   // Do something.
   future.get();
 }
 
```
  - executeSql
```
public final 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][google.spanner.v1.Transaction] for more details.
    Larger result sets can be fetched in streaming fashion by calling [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] instead.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ExecuteSqlRequest request =
       ExecuteSqlRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setSql("sql114126")
           .setParams(Struct.newBuilder().build())
           .putAllParamTypes(new HashMap<String, Type>())
           .setResumeToken(ByteString.EMPTY)
           .setPartitionToken(ByteString.EMPTY)
           .setSeqno(109325920)
           .setQueryOptions(ExecuteSqlRequest.QueryOptions.newBuilder().build())
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ResultSet response = spannerClient.executeSql(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - executeSqlCallable
```
public final com.google.api.gax.rpc.UnaryCallable<ExecuteSqlRequest,ResultSet> executeSqlCallable()
```
    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][google.spanner.v1.Transaction] for more details.
    Larger result sets can be fetched in streaming fashion by calling [ExecuteStreamingSql][google.spanner.v1.Spanner.ExecuteStreamingSql] instead.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ExecuteSqlRequest request =
       ExecuteSqlRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setSql("sql114126")
           .setParams(Struct.newBuilder().build())
           .putAllParamTypes(new HashMap<String, Type>())
           .setResumeToken(ByteString.EMPTY)
           .setPartitionToken(ByteString.EMPTY)
           .setSeqno(109325920)
           .setQueryOptions(ExecuteSqlRequest.QueryOptions.newBuilder().build())
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ApiFuture<ResultSet> future = spannerClient.executeSqlCallable().futureCall(request);
   // Do something.
   ResultSet response = future.get();
 }
 
```
  - executeStreamingSqlCallable
```
public final com.google.api.gax.rpc.ServerStreamingCallable<ExecuteSqlRequest,PartialResultSet> executeStreamingSqlCallable()
```
    Like [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql], except returns the result set as a stream. Unlike [ExecuteSql][google.spanner.v1.Spanner.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ExecuteSqlRequest request =
       ExecuteSqlRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setSql("sql114126")
           .setParams(Struct.newBuilder().build())
           .putAllParamTypes(new HashMap<String, Type>())
           .setResumeToken(ByteString.EMPTY)
           .setPartitionToken(ByteString.EMPTY)
           .setSeqno(109325920)
           .setQueryOptions(ExecuteSqlRequest.QueryOptions.newBuilder().build())
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ServerStream<PartialResultSet> stream =
       spannerClient.executeStreamingSqlCallable().call(request);
   for (PartialResultSet response : stream) {
     // Do something when a response is received.
   }
 }
 
```
  - executeBatchDml
```
public final 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][google.spanner.v1.Spanner.ExecuteSql].
    Statements are executed in sequential order. A request can succeed even if a statement fails. The [ExecuteBatchDmlResponse.status][google.spanner.v1.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ExecuteBatchDmlRequest request =
       ExecuteBatchDmlRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .addAllStatements(new ArrayList<ExecuteBatchDmlRequest.Statement>())
           .setSeqno(109325920)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ExecuteBatchDmlResponse response = spannerClient.executeBatchDml(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - executeBatchDmlCallable
```
public final com.google.api.gax.rpc.UnaryCallable<ExecuteBatchDmlRequest,ExecuteBatchDmlResponse> executeBatchDmlCallable()
```
    Executes a batch of SQL DML statements. This method allows many statements to be run with lower latency than submitting them sequentially with [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql].
    Statements are executed in sequential order. A request can succeed even if a statement fails. The [ExecuteBatchDmlResponse.status][google.spanner.v1.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ExecuteBatchDmlRequest request =
       ExecuteBatchDmlRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .addAllStatements(new ArrayList<ExecuteBatchDmlRequest.Statement>())
           .setSeqno(109325920)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ApiFuture<ExecuteBatchDmlResponse> future =
       spannerClient.executeBatchDmlCallable().futureCall(request);
   // Do something.
   ExecuteBatchDmlResponse response = future.get();
 }
 
```
  - read
```
public final ResultSet read(ReadRequest request)
```
    Reads rows from the database using key lookups and scans, as a simple key/value style alternative to [ExecuteSql][google.spanner.v1.Spanner.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][google.spanner.v1.Transaction] for more details.
    Larger result sets can be yielded in streaming fashion by calling [StreamingRead][google.spanner.v1.Spanner.StreamingRead] instead.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ReadRequest request =
       ReadRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setTable("table110115790")
           .setIndex("index100346066")
           .addAllColumns(new ArrayList<String>())
           .setKeySet(KeySet.newBuilder().build())
           .setLimit(102976443)
           .setResumeToken(ByteString.EMPTY)
           .setPartitionToken(ByteString.EMPTY)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ResultSet response = spannerClient.read(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - readCallable
```
public final com.google.api.gax.rpc.UnaryCallable<ReadRequest,ResultSet> readCallable()
```
    Reads rows from the database using key lookups and scans, as a simple key/value style alternative to [ExecuteSql][google.spanner.v1.Spanner.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][google.spanner.v1.Transaction] for more details.
    Larger result sets can be yielded in streaming fashion by calling [StreamingRead][google.spanner.v1.Spanner.StreamingRead] instead.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ReadRequest request =
       ReadRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setTable("table110115790")
           .setIndex("index100346066")
           .addAllColumns(new ArrayList<String>())
           .setKeySet(KeySet.newBuilder().build())
           .setLimit(102976443)
           .setResumeToken(ByteString.EMPTY)
           .setPartitionToken(ByteString.EMPTY)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ApiFuture<ResultSet> future = spannerClient.readCallable().futureCall(request);
   // Do something.
   ResultSet response = future.get();
 }
 
```
  - streamingReadCallable
```
public final com.google.api.gax.rpc.ServerStreamingCallable<ReadRequest,PartialResultSet> streamingReadCallable()
```
    Like [Read][google.spanner.v1.Spanner.Read], except returns the result set as a stream. Unlike [Read][google.spanner.v1.Spanner.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   ReadRequest request =
       ReadRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setTable("table110115790")
           .setIndex("index100346066")
           .addAllColumns(new ArrayList<String>())
           .setKeySet(KeySet.newBuilder().build())
           .setLimit(102976443)
           .setResumeToken(ByteString.EMPTY)
           .setPartitionToken(ByteString.EMPTY)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ServerStream<PartialResultSet> stream = spannerClient.streamingReadCallable().call(request);
   for (PartialResultSet response : stream) {
     // Do something when a response is received.
   }
 }
 
```
  - beginTransaction
```
public final Transaction beginTransaction(SessionName session,
                                          TransactionOptions options)
```
    Begins a new transaction. This step can often be skipped: [Read][google.spanner.v1.Spanner.Read], [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and [Commit][google.spanner.v1.Spanner.Commit] can begin a new transaction as a side-effect.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   SessionName session = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]");
   TransactionOptions options = TransactionOptions.newBuilder().build();
   Transaction response = spannerClient.beginTransaction(session, options);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction runs.
    
    options - Required. Options for the new transaction.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - beginTransaction
```
public final Transaction beginTransaction(String session,
                                          TransactionOptions options)
```
    Begins a new transaction. This step can often be skipped: [Read][google.spanner.v1.Spanner.Read], [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and [Commit][google.spanner.v1.Spanner.Commit] can begin a new transaction as a side-effect.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String session =
       SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString();
   TransactionOptions options = TransactionOptions.newBuilder().build();
   Transaction response = spannerClient.beginTransaction(session, options);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction runs.
    
    options - Required. Options for the new transaction.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - beginTransaction
```
public final Transaction beginTransaction(BeginTransactionRequest request)
```
    Begins a new transaction. This step can often be skipped: [Read][google.spanner.v1.Spanner.Read], [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and [Commit][google.spanner.v1.Spanner.Commit] can begin a new transaction as a side-effect.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   BeginTransactionRequest request =
       BeginTransactionRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setOptions(TransactionOptions.newBuilder().build())
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   Transaction response = spannerClient.beginTransaction(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - beginTransactionCallable
```
public final com.google.api.gax.rpc.UnaryCallable<BeginTransactionRequest,Transaction> beginTransactionCallable()
```
    Begins a new transaction. This step can often be skipped: [Read][google.spanner.v1.Spanner.Read], [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql] and [Commit][google.spanner.v1.Spanner.Commit] can begin a new transaction as a side-effect.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   BeginTransactionRequest request =
       BeginTransactionRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setOptions(TransactionOptions.newBuilder().build())
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ApiFuture<Transaction> future = spannerClient.beginTransactionCallable().futureCall(request);
   // Do something.
   Transaction response = future.get();
 }
 
```
  - commit
```
public final CommitResponse commit(SessionName session,
                                   com.google.protobuf.ByteString transactionId,
                                   List<Mutation> mutations)
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   SessionName session = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]");
   ByteString transactionId = ByteString.EMPTY;
   List<Mutation> mutations = new ArrayList<>();
   CommitResponse response = spannerClient.commit(session, transactionId, mutations);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction to be committed is running.
    
    transactionId - Commit a previously-started transaction.
    
    mutations - The mutations to be executed when this transaction commits. All mutations are applied atomically, in the order they appear in this list.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - commit
```
public final CommitResponse commit(SessionName session,
                                   TransactionOptions singleUseTransaction,
                                   List<Mutation> mutations)
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   SessionName session = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]");
   TransactionOptions singleUseTransaction = TransactionOptions.newBuilder().build();
   List<Mutation> mutations = new ArrayList<>();
   CommitResponse response = spannerClient.commit(session, singleUseTransaction, mutations);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction to be committed is running.
    
    singleUseTransaction - Execute mutations in a temporary transaction. Note that unlike commit of a previously-started transaction, commit with a temporary transaction is non-idempotent. That is, if the `CommitRequest` is sent to Cloud Spanner more than once (for instance, due to retries in the application, or in the transport library), it is possible that the mutations are executed more than once. If this is undesirable, use [BeginTransaction][google.spanner.v1.Spanner.BeginTransaction] and [Commit][google.spanner.v1.Spanner.Commit] instead.
    
    mutations - The mutations to be executed when this transaction commits. All mutations are applied atomically, in the order they appear in this list.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - commit
```
public final CommitResponse commit(String session,
                                   com.google.protobuf.ByteString transactionId,
                                   List<Mutation> mutations)
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String session =
       SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString();
   ByteString transactionId = ByteString.EMPTY;
   List<Mutation> mutations = new ArrayList<>();
   CommitResponse response = spannerClient.commit(session, transactionId, mutations);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction to be committed is running.
    
    transactionId - Commit a previously-started transaction.
    
    mutations - The mutations to be executed when this transaction commits. All mutations are applied atomically, in the order they appear in this list.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - commit
```
public final CommitResponse commit(String session,
                                   TransactionOptions singleUseTransaction,
                                   List<Mutation> mutations)
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String session =
       SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString();
   TransactionOptions singleUseTransaction = TransactionOptions.newBuilder().build();
   List<Mutation> mutations = new ArrayList<>();
   CommitResponse response = spannerClient.commit(session, singleUseTransaction, mutations);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction to be committed is running.
    
    singleUseTransaction - Execute mutations in a temporary transaction. Note that unlike commit of a previously-started transaction, commit with a temporary transaction is non-idempotent. That is, if the `CommitRequest` is sent to Cloud Spanner more than once (for instance, due to retries in the application, or in the transport library), it is possible that the mutations are executed more than once. If this is undesirable, use [BeginTransaction][google.spanner.v1.Spanner.BeginTransaction] and [Commit][google.spanner.v1.Spanner.Commit] instead.
    
    mutations - The mutations to be executed when this transaction commits. All mutations are applied atomically, in the order they appear in this list.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - commit
```
public final 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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   CommitRequest request =
       CommitRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .addAllMutations(new ArrayList<Mutation>())
           .setReturnCommitStats(true)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   CommitResponse response = spannerClient.commit(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - commitCallable
```
public final com.google.api.gax.rpc.UnaryCallable<CommitRequest,CommitResponse> commitCallable()
```
    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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   CommitRequest request =
       CommitRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .addAllMutations(new ArrayList<Mutation>())
           .setReturnCommitStats(true)
           .setRequestOptions(RequestOptions.newBuilder().build())
           .build();
   ApiFuture<CommitResponse> future = spannerClient.commitCallable().futureCall(request);
   // Do something.
   CommitResponse response = future.get();
 }
 
```
  - rollback
```
public final void rollback(SessionName session,
                           com.google.protobuf.ByteString transactionId)
```
    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][google.spanner.v1.Spanner.Read] or [ExecuteSql][google.spanner.v1.Spanner.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`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   SessionName session = SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]");
   ByteString transactionId = ByteString.EMPTY;
   spannerClient.rollback(session, transactionId);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction to roll back is running.
    
    transactionId - Required. The transaction to roll back.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - rollback
```
public final void rollback(String session,
                           com.google.protobuf.ByteString transactionId)
```
    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][google.spanner.v1.Spanner.Read] or [ExecuteSql][google.spanner.v1.Spanner.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`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   String session =
       SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString();
   ByteString transactionId = ByteString.EMPTY;
   spannerClient.rollback(session, transactionId);
 }
 
```
    Parameters:
    
    session - Required. The session in which the transaction to roll back is running.
    
    transactionId - Required. The transaction to roll back.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - rollback
```
public final void 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][google.spanner.v1.Spanner.Read] or [ExecuteSql][google.spanner.v1.Spanner.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`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   RollbackRequest request =
       RollbackRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransactionId(ByteString.EMPTY)
           .build();
   spannerClient.rollback(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - rollbackCallable
```
public final com.google.api.gax.rpc.UnaryCallable<RollbackRequest,com.google.protobuf.Empty> rollbackCallable()
```
    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][google.spanner.v1.Spanner.Read] or [ExecuteSql][google.spanner.v1.Spanner.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`.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   RollbackRequest request =
       RollbackRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransactionId(ByteString.EMPTY)
           .build();
   ApiFuture<Empty> future = spannerClient.rollbackCallable().futureCall(request);
   // Do something.
   future.get();
 }
 
```
  - partitionQuery
```
public final 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][google.spanner.v1.Spanner.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   PartitionQueryRequest request =
       PartitionQueryRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setSql("sql114126")
           .setParams(Struct.newBuilder().build())
           .putAllParamTypes(new HashMap<String, Type>())
           .setPartitionOptions(PartitionOptions.newBuilder().build())
           .build();
   PartitionResponse response = spannerClient.partitionQuery(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - partitionQueryCallable
```
public final com.google.api.gax.rpc.UnaryCallable<PartitionQueryRequest,PartitionResponse> partitionQueryCallable()
```
    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][google.spanner.v1.Spanner.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   PartitionQueryRequest request =
       PartitionQueryRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setSql("sql114126")
           .setParams(Struct.newBuilder().build())
           .putAllParamTypes(new HashMap<String, Type>())
           .setPartitionOptions(PartitionOptions.newBuilder().build())
           .build();
   ApiFuture<PartitionResponse> future =
       spannerClient.partitionQueryCallable().futureCall(request);
   // Do something.
   PartitionResponse response = future.get();
 }
 
```
  - partitionRead
```
public final 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][google.spanner.v1.Spanner.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   PartitionReadRequest request =
       PartitionReadRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setTable("table110115790")
           .setIndex("index100346066")
           .addAllColumns(new ArrayList<String>())
           .setKeySet(KeySet.newBuilder().build())
           .setPartitionOptions(PartitionOptions.newBuilder().build())
           .build();
   PartitionResponse response = spannerClient.partitionRead(request);
 }
 
```
    Parameters:
    
    request - The request object containing all of the parameters for the API call.
    
    Throws:
    
    com.google.api.gax.rpc.ApiException - if the remote call fails
  - partitionReadCallable
```
public final com.google.api.gax.rpc.UnaryCallable<PartitionReadRequest,PartitionResponse> partitionReadCallable()
```
    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][google.spanner.v1.Spanner.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.
    Sample code:
```
 try (SpannerClient spannerClient = SpannerClient.create()) {
   PartitionReadRequest request =
       PartitionReadRequest.newBuilder()
           .setSession(
               SessionName.of("[PROJECT]", "[INSTANCE]", "[DATABASE]", "[SESSION]").toString())
           .setTransaction(TransactionSelector.newBuilder().build())
           .setTable("table110115790")
           .setIndex("index100346066")
           .addAllColumns(new ArrayList<String>())
           .setKeySet(KeySet.newBuilder().build())
           .setPartitionOptions(PartitionOptions.newBuilder().build())
           .build();
   ApiFuture<PartitionResponse> future =
       spannerClient.partitionReadCallable().futureCall(request);
   // Do something.
   PartitionResponse response = future.get();
 }
 
```
  - close
```
public final void close()
```
    Specified by:
    
    close in interface AutoCloseable
  - shutdown
```
public void shutdown()
```
    Specified by:
    
    shutdown in interface com.google.api.gax.core.BackgroundResource
  - isShutdown
```
public boolean isShutdown()
```
    Specified by:
    
    isShutdown in interface com.google.api.gax.core.BackgroundResource
  - isTerminated
```
public boolean isTerminated()
```
    Specified by:
    
    isTerminated in interface com.google.api.gax.core.BackgroundResource
  - shutdownNow
```
public void shutdownNow()
```
    Specified by:
    
    shutdownNow in interface com.google.api.gax.core.BackgroundResource
  - awaitTermination
```
public boolean awaitTermination(long duration,
                                TimeUnit unit)
                         throws InterruptedException
```
    Specified by:
    
    awaitTermination in interface com.google.api.gax.core.BackgroundResource
    
    Throws:
    
    InterruptedException

Class SpannerClient

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SpannerClient

SpannerClient

Method Detail

create

create

create

getSettings

getStub

createSession

createSession

createSession

createSessionCallable

batchCreateSessions

batchCreateSessions

batchCreateSessions

batchCreateSessionsCallable

getSession

getSession

getSession

getSessionCallable

listSessions

listSessions

listSessions

listSessionsPagedCallable

listSessionsCallable

deleteSession

deleteSession

deleteSession

deleteSessionCallable

executeSql

executeSqlCallable

executeStreamingSqlCallable

executeBatchDml

executeBatchDmlCallable

read

readCallable

streamingReadCallable

beginTransaction

beginTransaction

beginTransaction

beginTransactionCallable

commit

commit

commit

commit

commit

commitCallable

rollback

rollback

rollback

rollbackCallable

partitionQuery

partitionQueryCallable

partitionRead

partitionReadCallable

close

shutdown

isShutdown

isTerminated

shutdownNow

awaitTermination