mirror of
https://github.com/google/santa.git
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85 lines
3.1 KiB
Objective-C
85 lines
3.1 KiB
Objective-C
/// Copyright 2016 Google Inc. All rights reserved.
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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#import "Source/santad/SNTSyncdQueue.h"
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#import <MOLXPCConnection/MOLXPCConnection.h>
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#import "Source/common/SNTLogging.h"
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#import "Source/common/SNTStoredEvent.h"
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#import "Source/common/SNTXPCSyncServiceInterface.h"
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@interface SNTSyncdQueue ()
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@property NSCache<NSString *, NSDate *> *uploadBackoff;
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@property dispatch_queue_t syncdQueue;
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@end
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@implementation SNTSyncdQueue
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- (instancetype)init {
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self = [super init];
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if (self) {
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_uploadBackoff = [[NSCache alloc] init];
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_uploadBackoff.countLimit = 128;
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_syncdQueue = dispatch_queue_create("com.google.syncd_queue", DISPATCH_QUEUE_SERIAL);
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}
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return self;
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}
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- (void)addEvents:(NSArray<SNTStoredEvent *> *)events isFromBundle:(BOOL)isFromBundle {
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if (!events.count) return;
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SNTStoredEvent *first = events.firstObject;
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NSString *hash = isFromBundle ? first.fileBundleHash : first.fileSHA256;
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if (![self backoffForPrimaryHash:hash]) return;
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[self dispatchBlockOnSyncdQueue:^{
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[self.syncConnection.remoteObjectProxy postEventsToSyncServer:events fromBundle:isFromBundle];
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}];
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}
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- (void)addBundleEvent:(SNTStoredEvent *)event reply:(void (^)(SNTBundleEventAction))reply {
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if (![self backoffForPrimaryHash:event.fileBundleHash]) return;
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[self dispatchBlockOnSyncdQueue:^{
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[self.syncConnection.remoteObjectProxy
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postBundleEventToSyncServer:event
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reply:^(SNTBundleEventAction action) {
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// Remove the backoff entry for the initial block event. The same
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// event will be included in the related events synced using
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// addEvents:isFromBundle:.
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if (action == SNTBundleEventActionSendEvents) {
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[self.uploadBackoff removeObjectForKey:event.fileBundleHash];
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}
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reply(action);
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}];
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}];
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}
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- (void)dispatchBlockOnSyncdQueue:(void (^)(void))block {
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if (!block) return;
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dispatch_async(self.syncdQueue, ^{
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block();
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});
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}
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// The event upload is skipped if an event has been initiated for it in the last 10 minutes.
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// The passed-in hash is fileBundleHash for a bundle event, or fileSHA256 for a normal event.
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- (BOOL)backoffForPrimaryHash:(NSString *)hash {
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NSDate *backoff = [self.uploadBackoff objectForKey:hash];
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NSDate *now = [NSDate date];
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if (([now timeIntervalSince1970] - [backoff timeIntervalSince1970]) < 600) return NO;
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[self.uploadBackoff setObject:now forKey:hash];
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return YES;
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}
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@end
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