Spawner Overview

The spawner is a program that runs on the server host and listens for requests. When a request is received, the spawner accepts the connection and performs the action that is associated with the port or service on which the connection was made. A connection to a spawner may

• request a SAS object server
• initiate the Administrator Interface
• request a Universal Unique Identifier (UUIDGEND).

Request a SAS Object Server

When a connection is made on a port or service that is associated with a sasServer object, the spawner authenticates the client connection. The spawner then launches a SAS object server for use by the connecting client.

To launch the server, the spawner locates the appropriate object server definition(s) by using the following rules:

• The domain (sasDomainName) must match. The lack of a domain is considered a domain.
• The sasServer definition must have a protocol (sasProtocol) of bridge.
• The logical names specified in the sasServer definition must be a subset of the logical names that are specified in the sasSpawner definition.

Initiate the Administrator Interface

When a connection is made on the port or service that is identified as the sasOperatorPort or sasOperatorService attribute in the spawner definition, the spawner initiates the administration interface. Only one administrator can be active at a given time. For more information about the administration interface, see Monitoring the Spawner.

Request a Universal Unique Identifier (UUIDGEND)

A spawner may be configured to support UUID generation; or it may be configured solely as a UUID generator daemon. In either case, when a connection is made on the port or service that is identified as a sasUUIDPort or sasUUIDService attribute in the spawner definition, the spawner initiates UUID generation. For more information, see Configuring a UUID Generator.