MongoDB request DSL • opensavvy.ktmongo.dsl.options • ReadPreference

ReadPreference¶

enum ReadPreference : Enum<ReadPreference>

The read preference allows configuring which instance the request will be sent to.

Operations which do not specify a read preference are sent to the primary node.

External resources¶

Official documentation

Entries¶

`Primary`¶

Primary

The query is sent to the primary node in the replica set.

`PrimaryPreferred`¶

PrimaryPreferred

The query is sent to the primary node in the replica set. If the primary node is not available (e.g. during a failover), the operation reads from secondary nodes.

`Secondary`¶

Secondary

The query is sent only to secondary members of the replica set.

`SecondaryPreferred`¶

SecondaryPreferred

The query is sent to the secondary members of the replica set.

`Nearest`¶

Nearest

The driver reads from a member whose network latency falls within the acceptable latency window. The driver does not take into account whether that member is a primary or secondary.

Properties¶

`bsonName`¶

val bsonName: String

`name`¶

val name: String

`ordinal`¶

val ordinal: Int

Functions¶

`valueOf`¶

fun valueOf(value: String): ReadPreference

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

`values`¶

fun values(): Array<ReadPreference>

Returns an array containing the constants of this enum type, in the order they're declared.