Cache/memoize the output of RxSwift.Observables using cacheMap, cacheFlatMap, cacheFlatMapLatest and cacheFlatMapUntilExpired. Also available for Combine: https://github.com/BrianSemiglia/CombineCacheMap
Aside from caching, all functions work like their non-cache Rx-counterparts.
events.cacheMap { x -> Value in
// Closure executed once per unique `x`, replayed when not unique.
expensiveOperation(x)
}
events.cacheMap(whenExceeding: .seconds(1)) { x -> Value in
// Closure executed once per unique `x`, replayed when operation of unique value took
// longer than specified duration.
expensiveOperation(x)
}
events.cacheFlatMapInvalidatingOn { x -> Observable<(Value, Date)> in
// Closure executed once per unique `x`, replayed when input not unique. Cache
// invalidated when date returned is greater than or equal to date of event.
expensiveOperation(x).map { output in
return (output, Date() + hours(1))
}
}
// You can provide your own cache (disk, in-memory, etc.). NSCache is the default.
events.cacheMap(cache: MyCache()) { x -> Value in
expensiveOperation(x)
}To run the example project, clone the repo, and run pod install from the Example directory first.
RxCacheMap is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'RxCacheMap'RxCacheMap is available under the MIT license. See the LICENSE file for more info.