Class SessionPoolOptions.Builder (6.25.0)

Version 6.25.0

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public static class SessionPoolOptions.Builder

Builder for creating SessionPoolOptions.

Inheritance

java.lang.Object > SessionPoolOptions.Builder

Inherited Members

Object.clone()

Object.equals(Object)

Object.finalize()

Object.getClass()

Object.hashCode()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

Constructors

Builder()

public Builder()

Methods

build()

public SessionPoolOptions build()

Build a SessionPoolOption object

Returns

Type	Description
SessionPoolOptions

setAutoDetectDialect(boolean autoDetectDialect)

public SessionPoolOptions.Builder setAutoDetectDialect(boolean autoDetectDialect)

Sets whether the client should automatically execute a background query to detect the dialect that is used by the database or not. Set this option to true if you do not know what the dialect of the database will be.

Note that you can always call DatabaseClient#getDialect() to get the dialect of a database regardless of this setting, but by setting this to true, the value will be pre-populated and cached in the client.

Parameter

Name	Description
autoDetectDialect	boolean Whether the client should automatically execute a background query to detect the dialect of the underlying database

Returns

Type	Description
SessionPoolOptions.Builder	this builder for chaining

setBlockIfPoolExhausted()

public SessionPoolOptions.Builder setBlockIfPoolExhausted()

If all sessions are in use and there is no more room for creating new sessions, block for a session to become available. Default behavior is same.

Returns

Type	Description
SessionPoolOptions.Builder

setFailIfPoolExhausted()

public SessionPoolOptions.Builder setFailIfPoolExhausted()

If all sessions are in use and and maxSessions has been reached, fail the request by throwing a SpannerException with the error code RESOURCE_EXHAUSTED. Default behavior is to block the request.

Returns

Type	Description
SessionPoolOptions.Builder

setKeepAliveIntervalMinutes(int intervalMinutes)

public SessionPoolOptions.Builder setKeepAliveIntervalMinutes(int intervalMinutes)

How frequently to keep alive idle sessions. This should be less than 60 since an idle session is automatically closed after 60 minutes. Sessions will be kept alive by sending a dummy query "Select 1". Default value is 30 minutes.

Parameter

Name	Description
intervalMinutes	int

Returns

Type	Description
SessionPoolOptions.Builder

setMaxIdleSessions(int maxIdleSessions) (deprecated)

public SessionPoolOptions.Builder setMaxIdleSessions(int maxIdleSessions)

Deprecated. set a higher value for #setMinSessions(int) instead of using this configuration option. This option will be removed in a future release.

Maximum number of idle sessions that this pool will maintain. Pool will close any sessions beyond this but making sure to always have at least as many sessions as specified by #setMinSessions. To determine how many sessions are idle we look at maximum number of sessions used concurrently over a window of time. Any sessions beyond that are idle. Defaults to 0.

Parameter

Name	Description
maxIdleSessions	int

Returns

Type	Description
SessionPoolOptions.Builder

setMaxSessions(int maxSessions)

public SessionPoolOptions.Builder setMaxSessions(int maxSessions)

Maximum number of sessions that this pool will have. If current numbers of sessions in the pool is less than this and they are all busy, then a new session will be created for any new operation. If current number of in use sessions is same as this and a new request comes, pool can either block or fail. Defaults to 400.

Parameter

Name	Description
maxSessions	int

Returns

Type	Description
SessionPoolOptions.Builder

setMinSessions(int minSessions)

public SessionPoolOptions.Builder setMinSessions(int minSessions)

Minimum number of sessions that this pool will always maintain. These will be created eagerly in parallel. Defaults to 100.

Parameter

Name	Description
minSessions	int

Returns

Type	Description
SessionPoolOptions.Builder

setRemoveInactiveSessionAfter(Duration duration)

public SessionPoolOptions.Builder setRemoveInactiveSessionAfter(Duration duration)

Parameter

Name	Description
duration	org.threeten.bp.Duration

Returns

Type	Description
SessionPoolOptions.Builder

setWriteSessionsFraction(float writeSessionsFraction) (deprecated)

public SessionPoolOptions.Builder setWriteSessionsFraction(float writeSessionsFraction)

Deprecated. This configuration value is no longer in use. The session pool does not prepare any sessions for read/write transactions. Instead, a transaction will automatically be started by the first statement that is executed by a transaction by including a BeginTransaction option with that statement.

This method may be removed in a future release.

Parameter

Name	Description
writeSessionsFraction	float

Returns

Type	Description
SessionPoolOptions.Builder