Class ConnectionOptions (6.65.1) 

public class ConnectionOptions

Internal connection API for Google Cloud Spanner. This class may introduce breaking changes without prior notice.

Options for creating a Connection to a Google Cloud Spanner database.

Usage:

 
 
 ConnectionOptions options = ConnectionOptions.newBuilder()
       .setUri("cloudspanner:/projects/my_project_id/instances/my_instance_id/databases/my_database_name?autocommit=false")
       .setCredentialsUrl("/home/cloudspanner-keys/my-key.json")
       .build();
 try(Connection connection = options.getConnection()) {
   try(ResultSet rs = connection.executeQuery(Statement.of("SELECT SingerId, AlbumId, MarketingBudget FROM Albums"))) {
     while(rs.next()) {
       // do something
     }
   }
 }

Inheritance

java.lang.Object > ConnectionOptions

Static Fields

AUTOCOMMIT_PROPERTY_NAME

public static final String AUTOCOMMIT_PROPERTY_NAME

Name of the 'autocommit' connection property.

Field Value
Type Description
String

AUTO_PARTITION_MODE_PROPERTY_NAME

public static final String AUTO_PARTITION_MODE_PROPERTY_NAME
Field Value
Type Description
String

CHANNEL_PROVIDER_PROPERTY_NAME

public static final String CHANNEL_PROVIDER_PROPERTY_NAME

Name of the 'channelProvider' connection property.

Field Value
Type Description
String

CREDENTIALS_PROPERTY_NAME

public static final String CREDENTIALS_PROPERTY_NAME

Name of the 'credentials' connection property.

Field Value
Type Description
String

CREDENTIALS_PROVIDER_PROPERTY_NAME

public static final String CREDENTIALS_PROVIDER_PROPERTY_NAME

Name of the 'credentialsProvider' connection property.

Field Value
Type Description
String

DATABASE_ROLE_PROPERTY_NAME

public static final String DATABASE_ROLE_PROPERTY_NAME

Name of the 'databaseRole' connection property.

Field Value
Type Description
String

DATA_BOOST_ENABLED_PROPERTY_NAME

public static final String DATA_BOOST_ENABLED_PROPERTY_NAME
Field Value
Type Description
String

DELAY_TRANSACTION_START_UNTIL_FIRST_WRITE_NAME

public static final String DELAY_TRANSACTION_START_UNTIL_FIRST_WRITE_NAME

Name of the 'delay transaction start until first write' property.

Field Value
Type Description
String

ENABLE_CHANNEL_PROVIDER_SYSTEM_PROPERTY

public static final String ENABLE_CHANNEL_PROVIDER_SYSTEM_PROPERTY
Field Value
Type Description
String

ENABLE_CREDENTIALS_PROVIDER_SYSTEM_PROPERTY

public static final String ENABLE_CREDENTIALS_PROVIDER_SYSTEM_PROPERTY
Field Value
Type Description
String

ENABLE_ENCODED_CREDENTIALS_SYSTEM_PROPERTY

public static final String ENABLE_ENCODED_CREDENTIALS_SYSTEM_PROPERTY
Field Value
Type Description
String

ENCODED_CREDENTIALS_PROPERTY_NAME

public static final String ENCODED_CREDENTIALS_PROPERTY_NAME

Name of the 'encodedCredentials' connection property.

Field Value
Type Description
String

ENDPOINT_PROPERTY_NAME

public static final String ENDPOINT_PROPERTY_NAME

Name of the 'endpoint' connection property.

Field Value
Type Description
String

LENIENT_PROPERTY_NAME

public static final String LENIENT_PROPERTY_NAME

Name of the 'lenientMode' connection property.

Field Value
Type Description
String

MAX_PARTITIONED_PARALLELISM_PROPERTY_NAME

public static final String MAX_PARTITIONED_PARALLELISM_PROPERTY_NAME
Field Value
Type Description
String

MAX_PARTITIONS_PROPERTY_NAME

public static final String MAX_PARTITIONS_PROPERTY_NAME
Field Value
Type Description
String

MAX_SESSIONS_PROPERTY_NAME

public static final String MAX_SESSIONS_PROPERTY_NAME

Name of the 'maxSessions' connection property.

Field Value
Type Description
String

MIN_SESSIONS_PROPERTY_NAME

public static final String MIN_SESSIONS_PROPERTY_NAME

Name of the 'minSessions' connection property.

Field Value
Type Description
String

NUM_CHANNELS_PROPERTY_NAME

public static final String NUM_CHANNELS_PROPERTY_NAME

Name of the 'numChannels' connection property.

Field Value
Type Description
String

OAUTH_TOKEN_PROPERTY_NAME

public static final String OAUTH_TOKEN_PROPERTY_NAME

OAuth token to use for authentication. Cannot be used in combination with a credentials file.

Field Value
Type Description
String

READONLY_PROPERTY_NAME

public static final String READONLY_PROPERTY_NAME

Name of the 'readonly' connection property.

Field Value
Type Description
String

RETRY_ABORTS_INTERNALLY_PROPERTY_NAME

public static final String RETRY_ABORTS_INTERNALLY_PROPERTY_NAME

Name of the 'retry aborts internally' connection property.

Field Value
Type Description
String

ROUTE_TO_LEADER_PROPERTY_NAME

public static final String ROUTE_TO_LEADER_PROPERTY_NAME

Name of the 'routeToLeader' connection property.

Field Value
Type Description
String

RPC_PRIORITY_NAME

public static final String RPC_PRIORITY_NAME

Name of the 'rpcPriority' connection property.

Field Value
Type Description
String

TRACK_CONNECTION_LEAKS_PROPERTY_NAME

public static final String TRACK_CONNECTION_LEAKS_PROPERTY_NAME

Name of the 'trackStackTraceOfConnectionCreation' connection property.

Field Value
Type Description
String

TRACK_SESSION_LEAKS_PROPERTY_NAME

public static final String TRACK_SESSION_LEAKS_PROPERTY_NAME

Name of the 'trackStackTraceOfSessionCheckout' connection property.

Field Value
Type Description
String

USE_VIRTUAL_GRPC_TRANSPORT_THREADS_PROPERTY_NAME

public static final String USE_VIRTUAL_GRPC_TRANSPORT_THREADS_PROPERTY_NAME

Name of the property to enable/disable virtual threads for gRPC transport.

Field Value
Type Description
String

USE_VIRTUAL_THREADS_PROPERTY_NAME

public static final String USE_VIRTUAL_THREADS_PROPERTY_NAME

Name of the property to enable/disable virtual threads for the statement executor.

Field Value
Type Description
String

VALID_PROPERTIES

public static final Set<ConnectionOptions.ConnectionProperty> VALID_PROPERTIES

All valid connection properties.

Field Value
Type Description
Set<ConnectionProperty>

Static Methods

closeSpanner()

public static void closeSpanner()

Closes all Spanner instances that have been opened by connections during the lifetime of this JVM. Call this method at the end of your application to free up resources. You must close all Connections that have been opened by your application before calling this method. Failing to do so, will cause this method to throw a SpannerException.

This method is also automatically called by a shutdown hook (see Runtime#addShutdownHook(Thread)) when the JVM is shutdown gracefully.

getDefaultProjectId(Credentials credentials)

public static String getDefaultProjectId(Credentials credentials)

Gets the default project-id for the current environment as defined by ServiceOptions#getDefaultProjectId(), and if none could be found, the project-id of the given credentials if it contains any.

Parameter
Name Description
credentials com.google.auth.Credentials

The credentials to use to get the default project-id if none could be found in the environment.
Returns
Type Description
String

the default project-id.

newBuilder()

public static ConnectionOptions.Builder newBuilder()

Create a Builder for ConnectionOptions. Use this method to create ConnectionOptions that can be used to obtain a Connection.

Returns
Type Description
ConnectionOptions.Builder

a new Builder

Methods

getChannelProvider()

public TransportChannelProvider getChannelProvider()

Calls the getChannelProvider() method from the supplied class.

Returns
Type Description
TransportChannelProvider

getConnection()

public Connection getConnection()

Create a new Connection from this ConnectionOptions. Calling this method multiple times for the same ConnectionOptions will return multiple instances of Connections to the same database.

Returns
Type Description
Connection

a new Connection to the database referenced by this ConnectionOptions

getCredentials()

public Credentials getCredentials()

The Credentials of this ConnectionOptions. This is either the credentials specified in the credentialsUrl or the default Google application credentials

Returns
Type Description
com.google.auth.Credentials

getCredentialsUrl()

public String getCredentialsUrl()

The credentials URL of this ConnectionOptions

Returns
Type Description
String

getDatabaseId()

public DatabaseId getDatabaseId()

The Spanner DatabaseId that this ConnectionOptions will connect to

Returns
Type Description
DatabaseId

getDatabaseName()

public String getDatabaseName()

The Spanner database name that this ConnectionOptions will connect to

Returns
Type Description
String

getDatabaseRole()

public String getDatabaseRole()

The database role that is used for this connection. Assigning a role to a connection can be used to for example restrict the access of a connection to a specific set of tables.

Returns
Type Description
String

getDialect()

public Dialect getDialect()
Returns
Type Description
Dialect

getHost()

public String getHost()

The host and port number that this ConnectionOptions will connect to

Returns
Type Description
String

getInstanceId()

public String getInstanceId()

The Spanner Instance ID that this ConnectionOptions will connect to

Returns
Type Description
String

getMaxCommitDelay()

public Duration getMaxCommitDelay()

The max_commit_delay that should be applied to commit operations on this connection.

Returns
Type Description
Duration

getMaxSessions()

public Integer getMaxSessions()

The maximum number of sessions in the backing session pool of this connection. The session pool is shared between all connections in the same JVM that connect to the same Cloud Spanner database using the same connection settings.

Returns
Type Description
Integer

getMinSessions()

public Integer getMinSessions()

The minimum number of sessions in the backing session pool of this connection. The session pool is shared between all connections in the same JVM that connect to the same Cloud Spanner database using the same connection settings.

Returns
Type Description
Integer

getNumChannels()

public Integer getNumChannels()

The number of channels to use for the connection.

Returns
Type Description
Integer

getProjectId()

public String getProjectId()

The Google Project ID that this ConnectionOptions will connect to

Returns
Type Description
String

getSessionPoolOptions()

public SessionPoolOptions getSessionPoolOptions()

The SessionPoolOptions of this ConnectionOptions.

Returns
Type Description
SessionPoolOptions

getUri()

public String getUri()

The URI of this ConnectionOptions

Returns
Type Description
String

getWarnings()

public String getWarnings()

Any warnings that were generated while creating the ConnectionOptions instance.

Returns
Type Description
String

isAutoConfigEmulator()

public boolean isAutoConfigEmulator()

Whether connections created by this ConnectionOptions will automatically try to connect to the emulator using the default host/port of the emulator, and automatically create the instance and database that is specified in the connection string if these do not exist on the emulator instance.

Returns
Type Description
boolean

isAutocommit()

public boolean isAutocommit()

The initial autocommit value for connections created by this ConnectionOptions

Returns
Type Description
boolean

isReadOnly()

public boolean isReadOnly()

The initial readonly value for connections created by this ConnectionOptions

Returns
Type Description
boolean

isRetryAbortsInternally()

public boolean isRetryAbortsInternally()

The initial retryAbortsInternally value for connections created by this ConnectionOptions

Returns
Type Description
boolean

isReturnCommitStats()

public boolean isReturnCommitStats()

Whether connections created by this ConnectionOptions return commit stats.

Returns
Type Description
boolean

isRouteToLeader()

public boolean isRouteToLeader()

Whether read/write transactions and partitioned DML are preferred to be routed to the leader region.

Returns
Type Description
boolean

isUseVirtualGrpcTransportThreads()

public boolean isUseVirtualGrpcTransportThreads()

Whether virtual threads should be used for gRPC transport.

Returns
Type Description
boolean

isUseVirtualThreads()

public boolean isUseVirtualThreads()

Whether connections should use virtual threads for connection executors.

Returns
Type Description
boolean

toString()

public String toString()
Returns
Type Description
String
Overrides