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replace random eviction with LRU eviction

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Also took the opportunity to make the API conform to Swift 3 convention.
This commit is contained in:
Sami Samhuri 2016-08-10 23:59:07 -07:00
parent 3f46ef442b
commit 137bb3fac0
18 changed files with 406 additions and 286 deletions
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19
CacheCreek-iOS/CacheCreek.h Normal file
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@ -0,0 +1,19 @@
//
// CacheCreek-iOS.h
// CacheCreek-iOS
//
// Created by Christopher Luu on 1/26/16.
//
//
#import <UIKit/UIKit.h>
//! Project version number for CacheCreek-iOS.
FOUNDATION_EXPORT double CacheCreekVersionNumber;
//! Project version string for CacheCreek-iOS.
FOUNDATION_EXPORT const unsigned char CacheCreekVersionString[];
// In this header, you should import all the public headers of your framework using statements like #import <CacheCreek_iOS/PublicHeader.h>

0
CacheIsKing-iOS/Info.plist → CacheCreek-iOS/Info.plist
View file

19
CacheCreek-tvOS/CacheCreek.h Normal file
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@ -0,0 +1,19 @@
//
// CacheCreek-tvOS.h
// CacheCreek-tvOS
//
// Created by Christopher Luu on 1/26/16.
//
//
#import <UIKit/UIKit.h>
//! Project version number for CacheCreek-tvOS.
FOUNDATION_EXPORT double CacheCreeksVersionNumber;
//! Project version string for CacheCreek-tvOS.
FOUNDATION_EXPORT const unsigned char CacheCreekVersionString[];
// In this header, you should import all the public headers of your framework using statements like #import <CacheCreek_tvOS/PublicHeader.h>

0
CacheIsKing-tvOS/Info.plist → CacheCreek-tvOS/Info.plist
View file

16
CacheCreek.podspec Normal file
View file

@ -0,0 +1,16 @@
Pod::Spec.new do |s|
s.name = 'CacheCreek'
s.version = '0.1.0'
s.license = 'MIT'
s.summary = 'An LRU cache that can hold anything, including native Swift types.'
s.homepage = 'https://github.com/samsonjs/CacheCreek'
s.authors = { 'Christopher Luu' => 'nuudles@gmail.com', 'Sami Samhuri' => 'sami@samhuri.net' }
s.source = { :git => 'https://github.com/samsonjs/CacheCreek.git', :tag => s.version }
s.ios.deployment_target = '8.0'
s.tvos.deployment_target = '9.0'
s.source_files = 'Source/*.swift'
s.requires_arc = true
end

162
CacheIsKing.xcodeproj/project.pbxproj → CacheCreek.xcodeproj/project.pbxproj
View file

@ -7,14 +7,16 @@
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@ -60,7 +63,7 @@
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buildActionMask = 2147483647;
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runOnlyForDeploymentPostprocessing = 0;
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@ -71,9 +74,9 @@
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30D75C351C57D17400F4E62D /* CacheIsKing-tvOS */,
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30D75C251C57CE1400F4E62D /* CacheCreek-iOS */,
30D75C351C57D17400F4E62D /* CacheCreek-tvOS */,
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sourceTree = "<group>";
@ -81,47 +84,48 @@
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30D75C2D1C57CEC500F4E62D /* LRUCache.swift */,
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@ -131,7 +135,7 @@
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@ -139,16 +143,16 @@
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/* End PBXHeadersBuildPhase section */
/* Begin PBXNativeTarget section */
30D75C221C57CE1400F4E62D /* CacheIsKing-iOS */ = {
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buildConfigurationList = 30D75C291C57CE1400F4E62D /* Build configuration list for PBXNativeTarget "CacheIsKing-iOS" */;
buildConfigurationList = 30D75C291C57CE1400F4E62D /* Build configuration list for PBXNativeTarget "CacheCreek-iOS" */;
buildPhases = (
30D75C1E1C57CE1400F4E62D /* Sources */,
30D75C1F1C57CE1400F4E62D /* Frameworks */,
@ -159,14 +163,14 @@
);
dependencies = (
);
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productName = "CacheIsKing-iOS";
productReference = 30D75C231C57CE1400F4E62D /* CacheIsKing.framework */;
name = "CacheCreek-iOS";
productName = "CacheCreek-iOS";
productReference = 30D75C231C57CE1400F4E62D /* CacheCreek.framework */;
productType = "com.apple.product-type.framework";
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30D75C331C57D17400F4E62D /* CacheIsKing-tvOS */ = {
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buildConfigurationList = 30D75C391C57D17400F4E62D /* Build configuration list for PBXNativeTarget "CacheIsKing-tvOS" */;
buildConfigurationList = 30D75C391C57D17400F4E62D /* Build configuration list for PBXNativeTarget "CacheCreek-tvOS" */;
buildPhases = (
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30D75C301C57D17400F4E62D /* Frameworks */,
@ -177,14 +181,14 @@
);
dependencies = (
);
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productReference = 30D75C341C57D17400F4E62D /* CacheIsKing.framework */;
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productName = "CacheCreek-tvOS";
productReference = 30D75C341C57D17400F4E62D /* CacheCreek.framework */;
productType = "com.apple.product-type.framework";
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@ -195,9 +199,9 @@
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productName = CacheCreekTests;
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@ -207,7 +211,7 @@
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@ -220,7 +224,7 @@
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developmentRegion = English;
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@ -232,9 +236,9 @@
projectDirPath = "";
projectRoot = "";
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@ -269,7 +273,8 @@
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@ -278,7 +283,8 @@
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@ -286,7 +292,7 @@
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@ -295,7 +301,7 @@
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@ -304,6 +310,8 @@
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@ -354,14 +362,14 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
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INFOPLIST_FILE = "CacheCreek-iOS/Info.plist";
INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
IPHONEOS_DEPLOYMENT_TARGET = 8.0;
LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
MTL_ENABLE_DEBUG_INFO = YES;
ONLY_ACTIVE_ARCH = YES;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheIsKing-iOS";
PRODUCT_NAME = CacheIsKing;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheCreek-iOS";
PRODUCT_NAME = CacheCreek;
SDKROOT = iphoneos;
SKIP_INSTALL = YES;
SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@ -406,13 +414,13 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
INFOPLIST_FILE = "CacheIsKing-iOS/Info.plist";
INFOPLIST_FILE = "CacheCreek-iOS/Info.plist";
INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
IPHONEOS_DEPLOYMENT_TARGET = 8.0;
LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
MTL_ENABLE_DEBUG_INFO = NO;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheIsKing-iOS";
PRODUCT_NAME = CacheIsKing;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheCreek-iOS";
PRODUCT_NAME = CacheCreek;
SDKROOT = iphoneos;
SKIP_INSTALL = YES;
TARGETED_DEVICE_FAMILY = "1,2";
@ -462,13 +470,13 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
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MTL_ENABLE_DEBUG_INFO = YES;
ONLY_ACTIVE_ARCH = YES;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheIsKing-tvOS";
PRODUCT_NAME = CacheIsKing;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheCreek-tvOS";
PRODUCT_NAME = CacheCreek;
SDKROOT = appletvos;
SKIP_INSTALL = YES;
SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@ -513,12 +521,12 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
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MTL_ENABLE_DEBUG_INFO = NO;
PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheIsKing-tvOS";
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PRODUCT_BUNDLE_IDENTIFIER = "com.nuudles.CacheCreek-tvOS";
PRODUCT_NAME = CacheCreek;
SDKROOT = appletvos;
SKIP_INSTALL = YES;
TARGETED_DEVICE_FAMILY = 3;
@ -565,12 +573,12 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
INFOPLIST_FILE = CacheIsKingTests/Info.plist;
INFOPLIST_FILE = CacheCreekTests/Info.plist;
IPHONEOS_DEPLOYMENT_TARGET = 9.2;
LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
MTL_ENABLE_DEBUG_INFO = YES;
ONLY_ACTIVE_ARCH = YES;
PRODUCT_BUNDLE_IDENTIFIER = com.nuudles.CacheIsKingTests;
PRODUCT_BUNDLE_IDENTIFIER = com.nuudles.CacheCreekTests;
PRODUCT_NAME = "$(TARGET_NAME)";
SDKROOT = iphoneos;
SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@ -607,11 +615,11 @@
GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
INFOPLIST_FILE = CacheIsKingTests/Info.plist;
INFOPLIST_FILE = CacheCreekTests/Info.plist;
IPHONEOS_DEPLOYMENT_TARGET = 9.2;
LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
MTL_ENABLE_DEBUG_INFO = NO;
PRODUCT_BUNDLE_IDENTIFIER = com.nuudles.CacheIsKingTests;
PRODUCT_BUNDLE_IDENTIFIER = com.nuudles.CacheCreekTests;
PRODUCT_NAME = "$(TARGET_NAME)";
SDKROOT = iphoneos;
VALIDATE_PRODUCT = YES;
@ -621,7 +629,7 @@
/* End XCBuildConfiguration section */
/* Begin XCConfigurationList section */
30D75C1B1C57CD6100F4E62D /* Build configuration list for PBXProject "CacheIsKing" */ = {
30D75C1B1C57CD6100F4E62D /* Build configuration list for PBXProject "CacheCreek" */ = {
isa = XCConfigurationList;
buildConfigurations = (
30D75C1C1C57CD6100F4E62D /* Debug */,
@ -630,7 +638,7 @@
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
30D75C291C57CE1400F4E62D /* Build configuration list for PBXNativeTarget "CacheIsKing-iOS" */ = {
30D75C291C57CE1400F4E62D /* Build configuration list for PBXNativeTarget "CacheCreek-iOS" */ = {
isa = XCConfigurationList;
buildConfigurations = (
30D75C2A1C57CE1400F4E62D /* Debug */,
@ -639,7 +647,7 @@
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
30D75C391C57D17400F4E62D /* Build configuration list for PBXNativeTarget "CacheIsKing-tvOS" */ = {
30D75C391C57D17400F4E62D /* Build configuration list for PBXNativeTarget "CacheCreek-tvOS" */ = {
isa = XCConfigurationList;
buildConfigurations = (
30D75C3A1C57D17400F4E62D /* Debug */,
@ -648,7 +656,7 @@
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
};
30D75C491C57D2CA00F4E62D /* Build configuration list for PBXNativeTarget "CacheIsKingTests" */ = {
30D75C491C57D2CA00F4E62D /* Build configuration list for PBXNativeTarget "CacheCreekTests" */ = {
isa = XCConfigurationList;
buildConfigurations = (
30D75C4A1C57D2CA00F4E62D /* Debug */,

2
CacheIsKing.xcodeproj/project.xcworkspace/contents.xcworkspacedata → CacheCreek.xcodeproj/project.xcworkspace/contents.xcworkspacedata generated
View file

@ -2,6 +2,6 @@
<Workspace
version = "1.0">
<FileRef
location = "self:CacheIsKing.xcodeproj">
location = "self:/Users/sjs/Projects/CacheCreek/CacheCreek.xcodeproj">
</FileRef>
</Workspace>

35
CacheIsKing.xcodeproj/xcshareddata/xcschemes/CacheIsKing-iOS.xcscheme → CacheCreek.xcodeproj/xcshareddata/xcschemes/CacheCreek-iOS.xcscheme
View file

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<Scheme
LastUpgradeVersion = "0720"
LastUpgradeVersion = "0730"
version = "1.3">
<BuildAction
parallelizeBuildables = "YES"
@ -15,9 +15,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C221C57CE1400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-iOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-iOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</BuildActionEntry>
</BuildActionEntries>
@ -26,17 +26,16 @@
buildConfiguration = "Debug"
selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
shouldUseLaunchSchemeArgsEnv = "YES"
codeCoverageEnabled = "YES">
shouldUseLaunchSchemeArgsEnv = "YES">
<Testables>
<TestableReference
skipped = "NO">
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C401C57D2CA00F4E62D"
BuildableName = "CacheIsKingTests.xctest"
BlueprintName = "CacheIsKingTests"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreekTests.xctest"
BlueprintName = "CacheCreekTests"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</TestableReference>
</Testables>
@ -44,9 +43,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C221C57CE1400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-iOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-iOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</MacroExpansion>
<AdditionalOptions>
@ -66,9 +65,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C221C57CE1400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-iOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-iOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</MacroExpansion>
<AdditionalOptions>
@ -84,9 +83,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C221C57CE1400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-iOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-iOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</MacroExpansion>
</ProfileAction>

20
CacheIsKing.xcodeproj/xcshareddata/xcschemes/CacheIsKing-tvOS.xcscheme → CacheCreek.xcodeproj/xcshareddata/xcschemes/CacheCreek-tvOS.xcscheme
View file

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<Scheme
LastUpgradeVersion = "0720"
LastUpgradeVersion = "0730"
version = "1.3">
<BuildAction
parallelizeBuildables = "YES"
@ -15,9 +15,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C331C57D17400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-tvOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-tvOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</BuildActionEntry>
</BuildActionEntries>
@ -46,9 +46,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C331C57D17400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-tvOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-tvOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</MacroExpansion>
<AdditionalOptions>
@ -64,9 +64,9 @@
<BuildableReference
BuildableIdentifier = "primary"
BlueprintIdentifier = "30D75C331C57D17400F4E62D"
BuildableName = "CacheIsKing.framework"
BlueprintName = "CacheIsKing-tvOS"
ReferencedContainer = "container:CacheIsKing.xcodeproj">
BuildableName = "CacheCreek.framework"
BlueprintName = "CacheCreek-tvOS"
ReferencedContainer = "container:CacheCreek.xcodeproj">
</BuildableReference>
</MacroExpansion>
</ProfileAction>

0
CacheIsKingTests/Info.plist → CacheCreekTests/Info.plist
View file

130
CacheIsKingTests/CacheIsKingTests.swift → CacheCreekTests/LRUCacheTests.swift
View file

@ -1,39 +1,37 @@
//
// CacheIsKingTests.swift
// CacheIsKingTests
// CacheCreekTests.swift
// CacheCreekTests
//
// Created by Christopher Luu on 1/26/16.
//
//
import XCTest
@testable import CacheIsKing
@testable import CacheCreek
class CacheCreekTests: XCTestCase {
typealias Node = DoublyLinkedListNode
class CacheIsKingTests: XCTestCase {
func testSettingAndGettingItems() {
let cache = KingCache()
cache.setItem(123, forKey: "123")
let cache = LRUCache()
cache.set(item: 123, forKey: "123")
XCTAssert(cache.cacheDictionary.count == 1)
XCTAssert(cache.count == 1)
XCTAssert(cache.itemForKey("123") == 123)
XCTAssert(cache.cacheDictionary[AnyKey("123")] as? Int == .Some(123))
XCTAssert(cache.item(forKey: "123") == 123)
XCTAssert(cache[123] == nil)
cache[234] = "234"
XCTAssert(cache.cacheDictionary.count == 2)
XCTAssert(cache.count == 2)
XCTAssert(cache.itemForKey(234) == "234")
XCTAssert(cache.cacheDictionary[AnyKey(234)] as? String == .Some("234"))
XCTAssert(cache.item(forKey: 234) == "234")
// Test setting/getting an array
let array = [1, 2, 3, 4, 5]
cache[5] = array
XCTAssert(cache.cacheDictionary.count == 3)
XCTAssert(cache.count == 3)
if let fetchedArray: [Int] = cache.itemForKey(5) {
if let fetchedArray: [Int] = cache.item(forKey: 5) {
XCTAssert(fetchedArray == array)
}
else {
@ -43,7 +41,7 @@ class CacheIsKingTests: XCTestCase {
let testStruct = TestStruct(name: "Testing", value: Int(arc4random_uniform(100000)))
cache["TestingStruct"] = testStruct
guard let fetchedStruct: TestStruct = cache.itemForKey("TestingStruct") else {
guard let fetchedStruct: TestStruct = cache.item(forKey: "TestingStruct") else {
XCTFail()
return
}
@ -52,39 +50,39 @@ class CacheIsKingTests: XCTestCase {
}
func testDifferentKindsOfKeys() {
let cache = KingCache()
let cache = LRUCache()
let floatKey: Float = 123.456
cache.setItem(123.456, forKey: floatKey)
XCTAssert(cache.itemForKey(floatKey) as Double? == .Some(123.456))
cache.set(item: 123.456, forKey: floatKey)
XCTAssert(cache.item(forKey: floatKey) as Double? == .Some(123.456))
cache[floatKey] = 456.789
XCTAssert(cache.count == 1)
XCTAssert(cache[floatKey] as? Double == .Some(456.789))
cache.setItem("123.456", forKey: "123.456")
cache.set(item: "123.456", forKey: "123.456")
XCTAssert(cache.count == 2)
XCTAssert(cache.itemForKey("123.456") as String? == .Some("123.456"))
XCTAssert(cache.item(forKey: "123.456") as String? == .Some("123.456"))
let boolKey = true
cache.setItem(true, forKey: boolKey)
cache.set(item: true, forKey: boolKey)
XCTAssert(cache.count == 3)
XCTAssert(cache.itemForKey(boolKey) as Bool? == .Some(true))
XCTAssert(cache.item(forKey: boolKey) as Bool? == .Some(true))
cache.removeItemForKey(boolKey)
cache.removeItem(forKey: boolKey)
XCTAssert(cache.count == 2)
XCTAssert(cache.itemForKey(boolKey) as Bool? == .None)
XCTAssert(cache.item(forKey: boolKey) as Bool? == .None)
}
func testSettingAndGettingEnum() {
let cache = KingCache()
let cache = LRUCache()
cache["ABC"] = TestEnum.ABC
cache["DEF"] = TestEnum.DEF("BlahBlahBlah")
cache["GHI"] = TestEnum.GHI(-500)
guard let abc: TestEnum = cache.itemForKey("ABC"),
def: TestEnum = cache.itemForKey("DEF"),
ghi: TestEnum = cache.itemForKey("GHI")
guard let abc: TestEnum = cache.item(forKey: "ABC"),
def: TestEnum = cache.item(forKey: "DEF"),
ghi: TestEnum = cache.item(forKey: "GHI")
else {
XCTFail()
return
@ -99,7 +97,7 @@ class CacheIsKingTests: XCTestCase {
}
func testSubscripts() {
let cache = KingCache()
let cache = LRUCache()
// Int subscript
cache[123] = 123
@ -131,15 +129,15 @@ class CacheIsKingTests: XCTestCase {
}
func testRemovingItems() {
let cache = KingCache()
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
let cache = LRUCache()
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
XCTAssert(cache.count == 4)
cache.removeItemForKey(123)
cache.removeItem(forKey: 123)
XCTAssert(cache.count == 3)
XCTAssert(cache[123] == nil)
@ -153,10 +151,10 @@ class CacheIsKingTests: XCTestCase {
XCTAssert(cache.count == 0)
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
XCTAssert(cache.count == 4)
@ -164,10 +162,10 @@ class CacheIsKingTests: XCTestCase {
XCTAssert(cache.count == 0)
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
XCTAssert(cache.count == 4)
@ -175,10 +173,10 @@ class CacheIsKingTests: XCTestCase {
XCTAssert(cache.count == 0)
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
XCTAssert(cache.count == 4)
@ -187,17 +185,17 @@ class CacheIsKingTests: XCTestCase {
XCTAssert(cache.count == 4)
cache.removeItemForKey(999)
cache.removeItem(forKey: 999)
XCTAssert(cache.count == 4)
}
func testCountLimit() {
let cache = KingCache()
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
let cache = LRUCache()
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
XCTAssert(cache.count == 4)
@ -209,10 +207,10 @@ class CacheIsKingTests: XCTestCase {
XCTAssert(cache.count == 0)
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
XCTAssert(cache.count == 3)
@ -221,10 +219,10 @@ class CacheIsKingTests: XCTestCase {
cache.removeAllItems()
cache.setItem(123, forKey: 123)
cache.setItem(234, forKey: 234)
cache.setItem(345, forKey: 345)
cache.setItem(456, forKey: 456)
cache.set(item: 123, forKey: 123)
cache.set(item: 234, forKey: 234)
cache.set(item: 345, forKey: 345)
cache.set(item: 456, forKey: 456)
cache.countLimit = 2
@ -233,17 +231,17 @@ class CacheIsKingTests: XCTestCase {
func testEmptyEviction() {
// Make sure that an eviction on an empty dictionary doesn't crash
let cache = KingCache()
cache.evictItemsIfNeeded()
let cache = LRUCache()
cache.evictItems()
}
func testObjCObjects() {
let cache = KingCache()
let cache = LRUCache()
let oldCache = NSCache()
cache.setItem(oldCache, forKey: "InceptionCache")
cache.set(item: oldCache, forKey: "InceptionCache")
guard let _: NSCache = cache.itemForKey("InceptionCache") else {
guard let _: NSCache = cache.item(forKey: "InceptionCache") else {
XCTFail("Expected an NSCache object")
return
}

19
CacheIsKing-iOS/CacheIsKing.h
View file

@ -1,19 +0,0 @@
//
// CacheIsKing-iOS.h
// CacheIsKing-iOS
//
// Created by Christopher Luu on 1/26/16.
//
//
#import <UIKit/UIKit.h>
//! Project version number for CacheIsKing-iOS.
FOUNDATION_EXPORT double CacheIsKingVersionNumber;
//! Project version string for CacheIsKing-iOS.
FOUNDATION_EXPORT const unsigned char CacheIsKingVersionString[];
// In this header, you should import all the public headers of your framework using statements like #import <CacheIsKing_iOS/PublicHeader.h>

19
CacheIsKing-tvOS/CacheIsKing.h
View file

@ -1,19 +0,0 @@
//
// CacheIsKing-tvOS.h
// CacheIsKing-tvOS
//
// Created by Christopher Luu on 1/26/16.
//
//
#import <UIKit/UIKit.h>
//! Project version number for CacheIsKing-tvOS.
FOUNDATION_EXPORT double CacheIsKingsVersionNumber;
//! Project version string for CacheIsKing-tvOS.
FOUNDATION_EXPORT const unsigned char CacheIsKingVersionString[];
// In this header, you should import all the public headers of your framework using statements like #import <CacheIsKing_tvOS/PublicHeader.h>

16
CacheIsKing.podspec
View file

@ -1,16 +0,0 @@
Pod::Spec.new do |s|
s.name = 'CacheIsKing'
s.version = '0.0.2'
s.license = 'MIT'
s.summary = 'A simple cache that can hold anything, including Swift items'
s.homepage = 'https://github.com/nuudles/CacheIsKing'
s.authors = { 'Christopher Luu' => 'nuudles@gmail.com' }
s.source = { :git => 'https://github.com/nuudles/CacheIsKing.git', :tag => s.version }
s.ios.deployment_target = '8.0'
s.tvos.deployment_target = '9.0'
s.source_files = 'Source/*.swift'
s.requires_arc = true
end

36
README.md
View file

@ -1,10 +1,8 @@
# CacheIsKing
# CacheCreek
<a href="https://github.com/Carthage/Carthage/issues/179">
<img src="https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat">
</a>
### Forked from [CacheIsKing]()
`CacheIsKing` is a simple cache that allows you to store any item, including objects, pure Swift structs, enums (with associated values), etc. Simply put, it's designed to act like an `NSCache` for everything, including Swift variables.
`CacheCreek` provides an an LRU cache that allows you to store any item, including objects, pure Swift structs, enums (with associated values), etc. Simply put, it's designed to act like an `NSCache` for everything, including Swift variables.
## Features
@ -25,16 +23,16 @@
[CocoaPods](http://cocoapods.org) is a dependency manager for Cocoa projects.
Because `CacheIsKing ` is written in Swift, you must use frameworks.
Because `CacheCreek` is written in Swift, you must use frameworks.
To integrate `CacheIsKing ` into your Xcode project using CocoaPods, specify it in your `Podfile`:
To integrate `CacheCreek` into your Xcode project using CocoaPods, specify it in your `Podfile`:
```ruby
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!
pod 'CacheIsKing'
pod 'CacheCreek'
```
Then, run the following command:
@ -48,18 +46,18 @@ $ pod install
Add this to your `Cartfile`:
```
github "nuudles/CacheIsKing"
github "samsonjs/CacheCreek"
```
## Usage
Simply use the `KingCache` class similar to how you'd use a `NSCache`. Using the `setItem` and `itemForKey` methods allow you to use type inference to get the values you want.
Simply use the `LRUCache` class similar to how you'd use a `NSCache`. Using the `setItem` and `itemForKey` methods allow you to use type inference to get the values you want.
```swift
let cache = KingCache()
cache.setItem(123, forKey: "123")
let cache = LRUCache()
cache.set(item: 123, forKey: "123")
if let item: Int = cache.itemForKey(456) {
if let item: Int = cache.item(forKey: 456) {
doSomethingWithItem(item)
}
```
@ -67,7 +65,7 @@ if let item: Int = cache.itemForKey(456) {
You can also use subscripts to set/get items from the cache. Unfortunately since Swift doesn't support subscript methods with generics yet, you'll have to cast your items as necessary. Also currently only `String`, `Int`, and `Float` keys are supported:
```swift
let cache = KingCache()
let cache = LRUCache()
cache["123"] = 123
if let item = cache[456] as? Int {
@ -75,10 +73,10 @@ if let item = cache[456] as? Int {
}
```
The `KingCache` also has a `countLimit` property, which allows you to set the maximum number of items in the cache. It currently evicts randomly until the `countLimit` is met.
The `LRUCache` also has a `countLimit` property, which allows you to set the maximum number of items in the cache.
```swift
let cache = KingCache()
let cache = LRUCache()
cache.countLimit = 2
cache[123] = 123
@ -90,5 +88,9 @@ print("\(cache.count)") // shows a count of 2
## TODO
- Refine eviction algorithm (currently evicts randomly)
- Update with better subscript support once Swift supports subscripts with generics
# License
[MIT License](https://sjs.mit-license.org)

2
Source/AnyKey.swift
View file

@ -1,6 +1,6 @@
//
// AnyKey.swift
// CacheIsKing
// CacheCreek
//
// Created by Christopher Luu on 1/26/16.
//

100
Source/DoublyLinkedList.swift Normal file
View file

@ -0,0 +1,100 @@
//
// DoublyLinkedList.swift
// CacheCreek
//
// Created by Sami Samhuri on 2016-08-10.
//
struct DoublyLinkedList {
typealias Node = DoublyLinkedListNode
private(set) var head: Node?
private(set) var tail: Node?
private(set) var count = 0
var isEmpty: Bool {
return head == nil
}
mutating func prepend(key key: AnyKey, value: Any) -> Node {
let node = Node(key: key, value: value)
node.next = head
head?.prev = node
head = node
if tail == nil {
tail = node
}
count += 1
return node
}
mutating func append(key key: AnyKey, value: Any) -> Node {
let node = Node(key: key, value: value)
node.prev = tail
tail?.next = node
tail = node
if head == nil {
head = node
}
count += 1
return node
}
mutating func removeAll() {
head = nil
tail = nil
count = 0
}
mutating func removeLast() -> Node? {
if let node = tail {
remove(node: node)
return node
}
return nil
}
mutating func remove(node node: Node) {
if let prev = node.prev {
prev.next = node.next
}
else {
head = node.next
}
if let next = node.next {
next.prev = node.prev
}
else {
tail = node.prev
}
node.next = nil
node.prev = nil
count -= 1
}
mutating func moveToHead(node node: Node) {
remove(node: node)
prepend(key: node.key, value: node.value)
}
}
class DoublyLinkedListNode {
let key: AnyKey
let value: Any
var next: DoublyLinkedListNode?
weak var prev: DoublyLinkedListNode?
init(key: AnyKey, value: Any) {
self.key = key
self.value = value
}
}

89
Source/KingCache.swift → Source/LRUCache.swift
View file

@ -1,41 +1,46 @@
//
// KingCache.swift
// CacheIsKing
// LRUCache.swift
// CacheCreek
//
// Created by Christopher Luu on 1/26/16.
//
// Modified to use LRU eviction by Sami Samhuri on 2016-08-10.
//
import Foundation
/// `KingCache` is a simple cache that can hold anything, including Swift structs, enums, and values.
/// `LRUCache` is an LRU cache that can hold anything, including Swift structs, enums, and values.
/// It is designed to work similar to the `NSCache`, but with native Swift support.
///
public class KingCache {
public class LRUCache {
// MARK: - Private variables
/// An array of `NSNotificationCenter` observers that need to be removed upon deinitialization
private var notificationObservers: [NSObjectProtocol] = []
// MARK: - Internal variables
/// The dictionary that holds the cached values
var cacheDictionary: [AnyKey: Any] = [:]
/// The list of cached items. Most recently used item at head, least recently used item at tail.
private var items: DoublyLinkedList = DoublyLinkedList()
/// Maps keys of cached items to nodes in the linked list.
private var keyToNodeMap: [AnyKey:DoublyLinkedListNode] = [:]
// MARK: - Public variables
/// The number of items in the cache
/// The number of items in the cache.
public var count: Int {
return cacheDictionary.count
return items.count
}
/// The limit of the amount of items that can be held in the cache. This defaults to 0, which means there is no limit.
public var countLimit: UInt = 0 {
public var countLimit: Int = 0 {
didSet {
evictItemsIfNeeded()
assert(countLimit >= 0)
evictItems()
}
}
// MARK: - Initialization methods
public init() {
let removalBlock = { [unowned self] (_: NSNotification) in
self.cacheDictionary.removeAll()
self.removeAllItems()
}
var notificationObserver = NSNotificationCenter.defaultCenter()
@ -60,16 +65,12 @@ public class KingCache {
// MARK: - Internal methods
/// Evicts items if the `countLimit` has been reached.
/// This currently uses a random eviction policy, kicking out random items until the `countLimit` is satisfied.
///
func evictItemsIfNeeded() {
if countLimit > 0 && cacheDictionary.count > Int(countLimit) {
// TODO: Evict items with more rhyme or reason
var keys = cacheDictionary.keys.flatMap { $0 }
while cacheDictionary.count > Int(countLimit) {
let randomIndex = Int(arc4random_uniform(UInt32(keys.count)))
let key = keys.removeAtIndex(randomIndex)
cacheDictionary.removeValueForKey(key)
func evictItems() {
guard countLimit > 0 else { return }
while items.count > countLimit {
if let node = items.removeLast() {
keyToNodeMap[node.key] = nil
}
}
}
@ -80,9 +81,14 @@ public class KingCache {
/// - parameter item: The item to be cached
/// - parameter key: The key with which to cache the item
///
public func setItem<K: Hashable>(item: Any, forKey key: K) {
cacheDictionary[AnyKey(key)] = item
evictItemsIfNeeded()
public func set<K: Hashable>(item item: Any, forKey key: K) {
let key = AnyKey(key)
if let existingNode = keyToNodeMap[key] {
items.remove(node: existingNode)
}
let node = items.prepend(key: key, value: item)
keyToNodeMap[key] = node
evictItems()
}
/// Gets an item from the cache if it exists for a given `Hashable` key.
@ -93,8 +99,10 @@ public class KingCache {
/// - parameter key: The key whose item should be fetched
/// - returns: The item from the cache if it exists, or `nil` if an item could not be found
///
public func itemForKey<T, K: Hashable>(key: K) -> T? {
if let item = cacheDictionary[AnyKey(key)] as? T {
public func item<T, K: Hashable>(forKey key: K) -> T? {
let key = AnyKey(key)
if let node = keyToNodeMap[key], let item = node.value as? T {
items.moveToHead(node: node)
return item
}
return nil
@ -104,14 +112,19 @@ public class KingCache {
///
/// - parameter key: The key whose item should be removed
///
public func removeItemForKey<K: Hashable>(key: K) {
cacheDictionary[AnyKey(key)] = nil
public func removeItem<K: Hashable>(forKey key: K) {
let key = AnyKey(key)
if let node = keyToNodeMap[key] {
items.remove(node: node)
keyToNodeMap[key] = nil
}
}
/// Clears the entire cache.
///
public func removeAllItems() {
cacheDictionary.removeAll()
items.removeAll()
keyToNodeMap.removeAll()
}
// MARK: - Subscript methods
@ -120,14 +133,14 @@ public class KingCache {
///
public subscript(key: Int) -> Any? {
get {
return itemForKey(key)
return item(forKey: key)
}
set {
if let newValue = newValue {
setItem(newValue, forKey: key)
set(item: newValue, forKey: key)
}
else {
removeItemForKey(key)
removeItem(forKey: key)
}
}
}
@ -136,14 +149,14 @@ public class KingCache {
///
public subscript(key: Float) -> Any? {
get {
return itemForKey(key)
return item(forKey: key)
}
set {
if let newValue = newValue {
setItem(newValue, forKey: key)
set(item: newValue, forKey: key)
}
else {
removeItemForKey(key)
removeItem(forKey: key)
}
}
}
@ -152,14 +165,14 @@ public class KingCache {
///
public subscript(key: String) -> Any? {
get {
return itemForKey(key)
return item(forKey: key)
}
set {
if let newValue = newValue {
setItem(newValue, forKey: key)
set(item: newValue, forKey: key)
}
else {
removeItemForKey(key)
removeItem(forKey: key)
}
}
}