Automatically updating NSDockTile with badge count

BadgeCount.m

@interface AppDelegate : NSObject
@property (nonatomic, assign) NSInteger badgeCount;
@end

@implementation AppDelegate
@synthesize badgeCount;

// Override the badgeCount setter to update the dock tile whenever the count is set
- (void)setBadgeCount:(NSInteger)count
{
	badgeCount = count;
	NSDockTile *tile = [NSApp dockTile];
	// Show the badge if the count is larger than 0
	if (badgeCount) {
		[tile setShowsApplicationBadge:YES]; 
		// Set the label to a string that shows the numerical value
		[tile setBadgeLabel:[NSString stringWithFormat:@"%ld", badgeCount]];
	} else {
		[tile setShowsApplicationBadge:NO];
		[tile setBadgeLabel:nil]
	}
}
@end

Can you show me an easy example of how to make a simple dock tile app?

I'd like to add an unread count for my Coherence (a chrome wrapper) Google Inbox app.