/**
* Triggers pulling of updates up until at least {@code toTxId} if no pulling is currently
* happening and returns immediately.
*
* @return {@link Future} which will block on {@link Future#get()} until {@code toTxId} has been
* applied.
*/
@Override
public void fulfill(final long toTxId) throws InterruptedException {
if (!updatePuller.isActive()) {
throw new IllegalStateException("Update puller not active " + updatePuller);
}
updatePuller.await(
new Condition() {
@Override
public boolean evaluate(int currentTicket, int targetTicket) {
/**
* We need to await last *closed* transaction id, not last *committed* transaction id
* since right after leaving this method we might read records off of disk, and they had
* better be up to date, otherwise we read stale data.
*/
return transactionIdStore.getLastClosedTransactionId() >= toTxId;
}
});
}
