//

 //  MYBonjourService.h

 //  MYNetwork

 //

 //  Created by Jens Alfke on 1/22/08.

 //  Copyright 2008 Jens Alfke. All rights reserved.

 //

 #import <Foundation/Foundation.h>

 #import "ConcurrentOperation.h"

 @class MYBonjourResolveOperation;

 /** Represents a Bonjour service discovered by a BonjourBrowser. */

 @interface MYBonjourService : NSObject 

 {

     @private

     NSNetService *_netService;

     NSDictionary *_txtRecord;

     NSSet *_addresses;

     CFAbsoluteTime _addressesExpireAt;

     MYBonjourResolveOperation *_resolveOp;

 }

 /** The service's name. */

 @property (readonly) NSString *name;

 /** The service's metadata dictionary, from its DNS TXT record */

 @property (readonly,copy) NSDictionary *txtRecord;

 /** A convenience to access a single property from the TXT record. */

 - (NSString*) txtStringForKey: (NSString*)key;

 /** Returns a set of IPAddress objects; may be the empty set if address resolution failed,

     or nil if addresses have not been resolved yet (or expired).

     In the latter case, call -resolve and wait for the returned Operation to finish. */

 @property (readonly,copy) NSSet* addresses;

 /** Starts looking up the IP address(es) of this service.

     @return  The NSOperation representing the lookup; you can observe this to see when it

         completes, or you can observe the service's 'addresses' property. */

 - (MYBonjourResolveOperation*) resolve;

 /** The underlying NSNetSerice object. */

 @property (readonly) NSNetService *netService;

 // Protected methods, for subclass use only:

 - (id) initWithNetService: (NSNetService*)netService;

 // (for subclasses to override, but not call):

 - (void) added;

 - (void) removed;

 - (void) txtRecordChanged;

 @end

 @interface MYBonjourResolveOperation : ConcurrentOperation

 {

     MYBonjourService *_service;

     NSSet *_addresses;

 }

 @property (readonly) MYBonjourService *service;

 @property (readonly,retain) NSSet *addresses;

 @end