Using the system layer
VA Smalltalk provides parts that give you more direct control over network connections than is provided by the Proc Dialog parts. If the communication model you want to follow does not conform to the Proc Dialog's "connect-send-receive-disconnect" sequence, you can use these parts to build a more flexible network connection.
For each communication protocol, two parts work together to implement a network communication link: the Connection and the Connection Spec.
Connection
A Connection part represents a connection to a remote application. Its attributes, actions, and events enable the VA Smalltalk application to connect and disconnect, send and receive data, and monitor the connection status.
Each protocol has a different connection part. The connection parts are named as follows:
•APPC Conversation
•CICS Logical Unit of Work
•CPI-C Conversation
•MQI Series Connection
•RPC Client
•TCP Socket
Connection Spec
A Connection Spec part represents the specification of a particular network connection. It defines the name or address of the remote machine and the protocol-specific details necessary to set up a connection. A connection part must be provided with a connection spec part to make a network connection.
Each protocol has its own connection spec part; and the parts are named as follows:
•APPC Connection Spec
•CICS Program
•CPI-C Connection Spec
•MQI Connection Spec
•RPC Connection Spec
•TCP Connection Spec
Last modified date: 01/29/2015