runtime/me.ahoo.wow.runtime.access/AccessStampOptions

AccessStampOptions

class AccessStampOptions @InternalWowApi constructor(val batch: Int = DEFAULT_BATCH, val capacity: Int = DEFAULT_CAPACITY, val walkBatch: Int = DEFAULT_WALK_BATCH, val walkRate: Int = DEFAULT_WALK_RATE, val walkShare: Double = DEFAULT_WALK_SHARE, val interval: Duration = DEFAULT_INTERVAL, val leaseTtl: Duration = DEFAULT_TTL, val memberTtl: Duration = DEFAULT_TTL)

How a context stamps the histories (AccessStamping, AccessWalking): at most batch streams in one stamp, so one long history is written in statements of a bounded size, each by the version key; the last stamped attributes of at most capacity aggregates, which spare the follower a read of the previous stream; and the walks, walkBatch aggregates a page at most, at most walkRate a second and at most walkShare of the time, run every interval under a lease of leaseTtl, each node a member of its access schema of each type for memberTtl after its last run. The host configures them (wow.access.*).

Fields may be added: Wow builds it from the host's configuration, so the constructor is internal to Wow.

Constructors

AccessStampOptions

@InternalWowApi

constructor(batch: Int = DEFAULT_BATCH, capacity: Int = DEFAULT_CAPACITY, walkBatch: Int = DEFAULT_WALK_BATCH, walkRate: Int = DEFAULT_WALK_RATE, walkShare: Double = DEFAULT_WALK_SHARE, interval: Duration = DEFAULT_INTERVAL, leaseTtl: Duration = DEFAULT_TTL, memberTtl: Duration = DEFAULT_TTL)

Types

Companion

object Companion

Properties

batch

val batch: Int

capacity

val capacity: Int

interval

val interval: Duration

leaseTtl

val leaseTtl: Duration

memberTtl

val memberTtl: Duration

walkBatch

val walkBatch: Int

walkRate

val walkRate: Int

walkShare

val walkShare: Double

The most of the time a walk takes, as a share of one connection of the log store's: after an aggregate whose stamping took t, the walk waits t * (1 - walkShare) / walkShare. While the store's writes are pressed it halves, down to an eighth of it, and comes back once they are not.

Functions

equals

open operator override fun equals(other: Any?): Boolean

hashCode

open override fun hashCode(): Int

toString

open override fun toString(): String