Track is a thread safe cache write by Swift. Composed of DiskCache and MemoryCache which support LRU.
-
Thread safe: Implement by
dispatch_semaphore_t lock
andDISPATCH_QUEUE_CONCURRENT
. Cache methods are thread safe and no deadlock. -
LRU: Implement by linkedlist, it`s fast. You can manage a cache through functions to limit size, age of entries and memory usage to eliminate least recently used object.
-
Support async and sync operation.
-
Cache implement
SequenceType
Generator
, supportsubscrip
for ... in
map
flapmap
filter
...
Base use
Support Sync and Async Set, Get, RemoveObject, RemoveAll and Subscript.
let track = Cache.shareInstance
track.set(object: "object", forKey: "key")
track.object(forKey: "key")
track.removeObject(forKey: "key") { (cache, key, object) in }
track.removeAllObjects { (cache, key, object) in }
track["key"] = "object"
print(track["key"])
Other use
MemoryCache and DiskCache has feature of LRU, so they can eliminate least recently used object according countLimit
, costLimit
and ageLimit
.
let diskcache = DiskCache.shareInstance
diskcache.countLimit = 20
diskcache.costLimit = 1024 * 10
let memorycache = MemoryCache.shareInstance
memorycache.trim(toAge: 1000) { (cache, key, object) in }
memorycache.trim(toCount: 10) { (cache, key, object) in }
New features: SequenceType Generator
Cache support thread safe for ... in
map
forEache
...
let cache: Cache = Cache.shareInstance
for i in 1 ... 5 {
cache.set(object: "\(i)", forKey: "\(i)")
}
for object in cache {
print(object)
}
output: ("5", 5) ("4", 4) ("3", 3) ("2", 2) ("1", 1)
cache.forEach {
print($0)
}
output: ("1", 1) ("2", 2) ("3", 3) ("4", 4) ("5", 5)
let values = cache.map { return $0 }
print(values)
output: [("5", 5), ("4", 4), ("3", 3), ("2", 2), ("1", 1)]
CocoaPods
Support Swift 5.0
pod 'Track', :git => 'https://github.com/maquannene/Track.git', :branch => 'master'
Manually
- Download and drop
/Track
folder in your project. - Congratulations!
Thanks YYCache,PINCache very much. Some ideas from them.
Track is released under the MIT license.
如果来自天朝点击查看更多实现细节文章