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# NSMessagePortNameServer

A server takes and returns message ports.

```
@interface NSMessagePortNameServer : NSPortNameServer
```

## Overview

This port name server takes and returns instances of [`MessagePort`](/documentation/Foundation/MessagePort). Port removal functionality is not supported in [`NSMessagePortNameServer`](/documentation/Foundation/NSMessagePortNameServer); if you want to cancel a service, you have to destroy the port (invalidate the [`MessagePort`](/documentation/Foundation/MessagePort) object given to [`registerPort:name:`](/documentation/Foundation/NSPortNameServer/registerPort:name:)).

## Topics

### Getting the Server Object

[`+  sharedInstance`](/documentation/Foundation/NSMessagePortNameServer/sharedInstance)

Returns the singleton instance of `NSMessagePortNameServer`.

### Getting Ports By Name

[`-  portForName:`](/documentation/Foundation/NSMessagePortNameServer/portForName:)

Returns the `NSPort` object registered under a given name on the local host.

[`-  portForName:host:`](/documentation/Foundation/NSMessagePortNameServer/portForName:host:)

Returns the `NSPort` object registered under a given name on the local host.

## Relationships

### Inherits From

[`NSPortNameServer`](/documentation/Foundation/NSPortNameServer)

---

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