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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | 2x 2x 3x 1x 2x 2x 2x 2x 1x 1x 1x | import { IAgingCacheSetStrategy } from './IAgingCacheWriteStrategy';
import { IAgingCacheWrite } from './IAgingCache';
import { AgingCacheWriteStrategy } from './AgingCacheWriteStrategy';
/**
* Strategy to overwrite only if our value is newer than the high level
*/
export class OverwriteAgedSetStrategy<TKey, TValue>
extends AgingCacheWriteStrategy<TKey, TValue>
implements IAgingCacheSetStrategy<TKey, TValue>
{
set(key: TKey, value: TValue, force: boolean): Promise<IAgingCacheWrite<TValue>> {
if (force) {
return this.executeSet(key, value);
}
return this.setConditionally(key, value);
}
load(
key: TKey,
value: TValue,
evictAtLevel?: number,
force?: boolean
): Promise<IAgingCacheWrite<TValue>> {
Iif (force) {
return this.executeSet(key, value, evictAtLevel);
}
return this.setConditionally(key, value, evictAtLevel);
}
private setConditionally(
key: TKey,
value: TValue,
evictAtLevel?: number
): Promise<IAgingCacheWrite<TValue>> {
const currentAge = this.evictQueue.getInitialAge(key);
return this.hierarchy.getValueAtTopLevel(key).then(highestAgedValue => {
if (!highestAgedValue || this.evictQueue.compare(highestAgedValue.age, currentAge) <= 0) {
return this.executeSet(key, value, evictAtLevel);
}
this.logger.debug(
`Set deferred: key=${key},ageToSet=${currentAge},ageFound=${highestAgedValue.age}`
);
return this.setFromHighestLevel(key, highestAgedValue);
});
}
}
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