Trying to get hang of PDO

[Waldo Lee Sharvey]

For the last several days I've been trying to use Distributed Objects in my
application to no avail. I've scanned and scoured for multiple pieces of
documentation over just about everywhere, I've tried one variation of code
after another, initially trying to use NSSocketPort with domain sockets and
then dropping down to NSMessagePorts w/ name server (to rule out any socket
programming issues) and still nothing works.

The below is a mini-sized, minimalistic version of what I've been trying to
write. It's largely based off the example I found in the Advanced Mac
Programming book. My (simplified for the time being) goal is to create a
foundation-tool based daemon that vends a communication object that will let
a client Cocoa application connect and register as a client via distributed
objects.

The server seems to run okay, but the client tries to get the vended
NSMessagePort sendPort, sendPort shows up as nil in the debugger. What am I
doing wrong/misunderstanding?

######### Protocol ##################################

#import <Foundation/Foundation.h>

@protocol ClientMessages

- (oneway void)printHelloWorld:(NSString *)barcode;

@end

@protocol ServerMessages

- (BOOL)subscribeClient:(in byref id<ClientMessages>)newclient;

@end

######### Daemon Code ################################

#import <Foundation/Foundation.h>
#import "CommManager.h"


int main (int argc, const char * argv[])
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 NSRunLoop *runloop = [NSRunLoop currentRunLoop];
 CommManager *commManager = [[CommManager alloc] init];
 NSMessagePort *receivePort = [[NSMessagePort alloc] init];
 NSMessagePortNameServer *mpns = [NSMessagePortNameServer sharedInstance];
 [mpns registerPort:receivePort name:@"CommServerPort"];
 NSConnection *connection = [NSConnection
connectionWithReceivePort:receivePort sendPort:nil];

[connection setRootObject: commManager];
 [runloop run];
 [pool drain];
    return 0;
}

####### CommManager.h #####################

#import <Foundation/Foundation.h>
#import "CommProtocol.h"

@interface CommManager : NSObject <ServerMessages>
{
NSMutableArray *clients;
}

@end

###### CommManager.m ######################

#import "CommManager.h"
#import "CommProtocol.h"

@implementation CommManager

- (BOOL)subscribeClient:(in byref id<ClientMessages>)newclient
{
[clients addObject: newclient];
 return YES;
}

- (void)dealloc
{
[clients release];
 [super dealloc];
}

@end


########### ClientController.h #################################

#import <Cocoa/Cocoa.h>
#import "CommProtocol.h"

@interface ClientController : NSObject <ClientMessages>
{
id proxy;
}

@end

########### ClientController.m #################################


#import "ClientController.h"


@implementation ClientController

- (void)awakeFromNib
{
NSMessagePortNameServer *nameServer = [NSMessagePortNameServer
sharedInstance];
 // sendPort shows up as nil in the debugger
NSMessagePort *sendPort = [nameServer portForName:@"ChatterPort"];
 NSConnection *connection = [NSConnection connectionWithReceivePort:nil
sendPort: sendPort];
 proxy = [[connection rootProxy] retain];
 [proxy setProtocolForProxy:@protocol(ServerMessages)];
 BOOL successful = [proxy subscribeClient: self];
 if(successful)
{
NSLog(@"connected");
}
else
{
NSLog(@"not connected");
}
}
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