| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| |
| #import "CMISLinkCache.h" |
| #import "CMISBindingSession.h" |
| |
| // Default link cache size is 50 entries |
| #define DEFAULT_LINK_CACHE_SIZE 50 |
| |
| @interface CMISLinkCache () <NSCacheDelegate> |
| |
| /** |
| * Using an NSCache, as it gives us automatic cache cleanup and thread-safe operations |
| * https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/NSCache_Class/Reference/Reference.html |
| */ |
| @property (nonatomic, strong) NSCache *linkCache; |
| |
| @end |
| |
| @implementation CMISLinkCache |
| |
| |
| - (id)initWithBindingSession:(CMISBindingSession *)bindingSession |
| { |
| self = [super init]; |
| if (self) { |
| [self setupLinkCache:bindingSession]; |
| |
| } |
| return self; |
| } |
| |
| - (void)setupLinkCache:(CMISBindingSession *)bindingSession |
| { |
| self.linkCache = [[NSCache alloc] init]; |
| |
| id linkCacheSize = [bindingSession objectForKey:kCMISSessionParameterLinkCacheSize]; |
| if (linkCacheSize != nil) { |
| if ([[linkCacheSize class] isEqual:[NSNumber class]]) { |
| self.linkCache.countLimit = [(NSNumber *) linkCacheSize unsignedIntValue]; |
| } else { |
| log(@"Invalid object set for %@ session parameter. Ignoring and using default instead", kCMISSessionParameterLinkCacheSize); |
| } |
| } |
| |
| if (self.linkCache.countLimit <= 0) { |
| self.linkCache.countLimit = DEFAULT_LINK_CACHE_SIZE; |
| } |
| |
| // Uncomment for debugging |
| // self.linkCache.delegate = self; |
| } |
| |
| - (NSString *)linkForObjectId:(NSString *)objectId andRelation:(NSString *)rel |
| { |
| CMISLinkRelations *linkRelations = [self.linkCache objectForKey:objectId]; |
| return [linkRelations linkHrefForRel:rel]; |
| } |
| |
| - (NSString *)linkForObjectId:(NSString *)objectId andRelation:(NSString *)rel andType:(NSString *)type |
| { |
| CMISLinkRelations *linkRelations = [self.linkCache objectForKey:objectId]; |
| return [linkRelations linkHrefForRel:rel type:type]; |
| } |
| |
| - (void)addLinks:(CMISLinkRelations *)links forObjectId:(NSString *)objectId |
| { |
| [self.linkCache setObject:links forKey:objectId]; |
| } |
| |
| - (void)removeLinksForObjectId:(NSString *)objectId |
| { |
| [self.linkCache removeObjectForKey:objectId]; |
| } |
| |
| - (void)removeAllLinks |
| { |
| [self.linkCache removeAllObjects]; |
| } |
| |
| |
| // Debugging |
| //- (void)cache:(NSCache *)cache willEvictObject:(id)obj |
| //{ |
| // log(@"Link cache will evict cached links for object '%@'", obj); |
| //} |
| |
| @end |