Detecting/Repairing NSConnection failure
- by anthony
I would like to use NSConnection/NSDistributedObject for interprocess communication. I would like the client to be able to handle the case where the server is only occasionally reachable.
How can I determine if sending a message to the NSConnection will fail or has failed? Currently if my server (the process that has vended the remote object) dies, the client will crash if it sends a selector to the remote object.
Ideally I'd like to have a wrapper for the remote object that can lazily instantiate (or reinstantiate) the connection, and return a default value in the case where the connection could not be instantiated, or the connection has failed. I don't really know the correct way to do this using objective c.
Here's some pseudocode representing this logic:
if myConnection is null:
instantiate myConnection
if MyConnection is null:
return defaultValue
try
return [myConnection someMethod]
catch
myConnection = null
return defaultValue
