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MaxConns

Description

The MaxConns property is used to further specify a role definition in UniCon. It defines the maximum number of connections in which a role can be involved. To illustrate, a role with a MaxConns value of 2 cannot be associated with more than two players in a connection in a system. This number represents a maximum, not a requirement.

Property Lists

The MaxConns property can legally be specified in the property list in the following
UniCon language element:

<role>

Value Syntax

The syntax of the value of the MaxConns property is a simple <integer>.

Required Rule

Optional

Each role type has its own default:

--------------------
Role Type    Default  
--------------------
Caller       65535        
Definer      1        
Load         65535        
Participant  65535        
Readee       1        
Reader       65535        
Sink         1        
Source       1        
User         65535        
Writee       1        
Writer       65535    
--------------------

Merge Rule

REPLACE

Subsequent specifications of the MaxConns property in a single property list replace earlier specifications (i.e., the last specification is the one that the UniCon compiler uses).

Semantic Checks

The following are the semantic checks performed on the value of the MaxConns property:

The value of the MaxConns property may not be negative.
The value of the MaxConns property cannot exceed its default value as specified in the table above.
The value of the MaxConns property must be at least as large as the value of a player's MinConns value.

Example

The following is an example of a specification of a MaxConns property. It is embedded in a role definition of type Participant:

  ROLE C-Bundler-Participant IS Participant
    MAXCONNS (25)
  END C-Bundler-Participant

The above example prevents the C-Bundler-Particpant Participant role from being connected more than twenty-five times per instantiation of the connector in which it is defined.

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Author: Gregory Zelesnik

Last Modified: May 12, 1996