Problem:
Upgrading from SDK 5.0 to SDK 5.1 results in a deadlock if any Profile API calls are made from an Analytics Delegate Callback.
Example:
- (void)localyticsSessionWillOpen:(BOOL)isFirst isUpgrade:(BOOL)isUpgrade isResume:(BOOL)isResume;
{
NSDictionary *attributes = @{@"isFirstSession": isFirst ? @"true" : @"false",
@"isFirstSessionAfterUpgrade": isUpgrade ? @"true" : @"false",
@"willResumeOldSession": isResume ? @"true" : @"false"};
NSString *tag = [NSString stringWithFormat:@"delegate_event_willOpen_%lu",(unsigned long)self.count];
// The following line will result in a deadlock.
[Localytics setValue:@"test" forProfileAttribute:@"testing"];
[Localytics tagEvent:tag attributes: attributes];
}
The Profile related calls will result in a deadlock when called from any of the following callback methods:
-
(void)localyticsSessionWillOpen:(BOOL)isFirst isUpgrade:(BOOL)isUpgrade isResume:(BOOL)isResume -
(void)localyticsSessionWillOpen:(BOOL)isFirst isUpgrade:(BOOL)isUpgrade isResume:(BOOL)isResume -
(void)localyticsDidTagEvent:(NSString *)event attributes:(NSDictionary *)attributes customerValueIncrease:(NSNumber *)customerValueIncrease -
(void)localyticsSessionWillClose
Workaround:
- (void)localyticsSessionWillOpen:(BOOL)isFirst isUpgrade:(BOOL)isUpgrade isResume:(BOOL)isResume
{
NSDictionary *attributes = @{@"isFirstSession": isFirst ? @"true" : @"false",
@"isFirstSessionAfterUpgrade": isUpgrade ? @"true" : @"false",
@"willResumeOldSession": isResume ? @"true" : @"false"};
NSString *tag = [NSString stringWithFormat:@"delegate_event_willOpen_%lu",(unsigned long)self.count];
dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), ^{
// Wrapping the call in dispatch_async prevents the deadlock.
[Localytics setValue:@"test" forProfileAttribute:@"testing"];
});
[Localytics tagEvent:tag attributes: attributes];
}