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BROKEN example of concurrent code. This is for comparison ONLY
//
// ModelManager.m
// ThreadingHell
//
// Created by Cory D. Wiles on 10/19/12.
// Copyright (c) 2012 Cory D. Wiles. All rights reserved.
//
#import "ModelManager.h"
#import "NSMutableString+CoryAdditions.h"
static NSString* const wsRequestErrorDomain = @"net.epb.imf.im3.request.error";
static char const *imfQueueName = "net.epb.imf.im3.queue";
static dispatch_queue_t _imfDispatchQueue;
@implementation ModelManager
+ (void)initialize {
_imfDispatchQueue = dispatch_queue_create(imfQueueName, DISPATCH_QUEUE_CONCURRENT);
}
+ (ModelManager *)sharedManager {
static ModelManager *_sharedClient = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_sharedClient = [[self alloc] init];
});
return _sharedClient;
}
- (void)getAccountDetailsForAccountNumber:(NSString* )accountNumber
completionBlock:(IMFRequestCompletionBlock)completion {
dispatch_sync(_imfDispatchQueue, ^{
NSLog(@"trying to fetch information for details");
NSMutableString *details = [NSMutableString randomStringWithCapacity:10];
[details appendFormat:@" details"];
NSLog(@"details string: %@", details);
dispatch_async(dispatch_get_main_queue(), ^{
if (completion) {
if (details) {
completion(details, YES, nil);
} else {
NSString *errorMessage = [NSString stringWithFormat:@"Failed getting details for account: %@", accountNumber];
NSError *failerror = [NSError errorWithDomain:wsRequestErrorDomain
code:1002
userInfo:[NSDictionary dictionaryWithObject:NSLocalizedString(errorMessage, nil)
forKey:NSLocalizedDescriptionKey]];
completion(nil, NO, failerror);
}
}
});
});
}
- (void)getAccountListMetaInformation:(IMFRequestCompletionBlock)completion {
__block NSMutableDictionary *accountList = [NSMutableDictionary new];
__block NSMutableArray *accountDetails = [NSMutableArray new];
NSArray *loginResponse = @[@"account1", @"account2"];
if (loginResponse) {
NSLog(@"inside loginResponse");
dispatch_sync(_imfDispatchQueue, ^{
[loginResponse enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop){
NSLog(@"inside account loop for obj: %@", obj);
[self getAccountDetailsForAccountNumber:obj completionBlock:^(id obj, BOOL success, NSError *error) {
if (success) {
NSLog(@"success account looop");
[accountDetails addObject:obj];
} else {
NSLog(@"failed to get any accont details from account: %@ %@", obj, [error localizedDescription]);
}
}];
}];
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"should be updating main queue");
if (completion) {
if (accountDetails.count) {
completion(accountList, YES, nil);
} else {
NSString *errorMessage = @"There was error getting your accounts. Please login again.";
NSError *failerror = [NSError errorWithDomain:wsRequestErrorDomain
code:1003
userInfo:[NSDictionary dictionaryWithObject:NSLocalizedString(errorMessage, nil)
forKey:NSLocalizedDescriptionKey]];
completion(nil, NO, failerror);
}
}
});
});
}
}
@end
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