//  AppDelegate.m

NSString *const kCOMLocalOperationQueueTypeIdentifier = @"kCOMLocalOperationQueueTypeIdentifier";


#pragma mark - OperationQueues

- (void)registerOperationQueues
{
    //Local Background
    NSOperationQueue *localOperationQueue = [[NSOperationQueue alloc] init];
    localOperationQueue.qualityOfService = NSQualityOfServiceBackground;
    localOperationQueue.maxConcurrentOperationCount = 1;

    [[COMOperationQueueManager sharedInstance] registerOperationQueue:localOperationQueue
                                             operationQueueIdentifier:kCOMLocalOperationQueueTypeIdentifier];
}

//  COMExampleOperation.h

@interface COMExampleOperation : COMOperation

- (instancetype)initWithValue:(NSInteger)value;

@end

//  COMExampleOperation.m

@interface COMExampleOperation ()

@property (nonatomic, assign) NSInteger value;

@end

@implementation COMExampleOperation

@synthesize identifier = _identifier;

#pragma mark - Init

- (instancetype)initWithValue:(NSInteger)value
{
    self = [super init];

    if (self)
    {
        self.value = value;
    }

    return self;
}

#pragma mark - Identifier

- (NSString *)identifier
{
    if (!_identifier)
    {
        _identifier = [NSString stringWithFormat:@"COMExampleOperation-%@", @(self.value)];
    }

    return _identifier;
}

#pragma mark - Start

- (void)start
{
    [super start];

    srand((unsigned)time(0));
    NSInteger mod = self.value;
    NSInteger random = rand();
    NSInteger result = random % mod;

    [self didSucceedWithResult:@(result)];
}

#pragma mark - Cancel

- (void)cancel
{
    [super cancel];

    [self didSucceedWithResult:nil];
}

- (void)operationExample
{
    COMExampleOperation *operation = [[COMExampleOperation alloc] initWithValue:15];

    operation.operationQueueIdentifier = kCOMLocalOperationQueueTypeIdentifier;

    operation.onSuccess = ^(id result)
    {
        NSLog(@"%@", result);
    };

    [[COMOperationQueueManager sharedInstance] addOperation:operation];
}