fabric.lang

Interface Statistics

All Known Implementing Classes:

DefaultStatistics

public interface Statistics

A Statistics encapsulates the history of read and write requests for an object. It is maintained at the Store and is used to generate promise durations for the object.

Statistics objects are created by the Object.createStatistics() method. They are only heuristic information and may be discarded and recreated at any time.

Method Summary

Modifier and Type	Method and Description
void	commitRead() Called whenever a transaction that read the object is committed
void	commitWrote() Called whenever a transaction that wrote the object is committed
int	generatePromise() Determine the duration of a promise to issue.

Method Detail

commitRead

void commitRead()

Called whenever a transaction that read the object is committed

commitWrote

void commitWrote()

Called whenever a transaction that wrote the object is committed

generatePromise

int generatePromise()

Determine the duration of a promise to issue. While a promise is outstanding, the store will not permit updates to the object to commit. This allows read-only transactions to proceed without contacting the store.

Returns:

the duration, in milliseconds, of the promise.