send

The asynchronous operation belongs to the family of message-based communication operations. It is used to place a value on an outgoing message port.

• The operation can be used on connected ports.
• The operation is non-blocking (does not block TTCN3 program execution).
• In case of multiple connections the receiver may be addressed.

Related keywords:

• address
• create
• modifies
• system
• to

• port_reference points out the outgoing message port.

• The send keyword introduces the message sending.

• value_part is one of the following:

  • a literal value, a constant, a variable, an expression. (see the example1)
  • a specific value template (see the example 2)
  • a modified template (see the example 3)
     

The optionalto keyword is used when a port is connected to several entities and identification of the communication partner is required. address_reference is one of the following: a component reference (cf. create)  or the keyword system, in case of one-to-many connections. an address reference (cf. address) , when there are several entities within the system under test. Example 1: literal value Portus_PCO.send (charstring:"bla") to system; The character string bla is sent over the port Portus_PCO to the test system interface. The port is connected to several components. Example 2: template template DefinedRecordType t_MeusTemplate (integer pl_param) := {    field1 := 16,    field2 := pl_param } Portus_PCO.send (t_MeusTemplate(116)); The parameterized template (t_MeusTemplate) has two integer fields. When sent as shown in the second line, the values 16 and 116 will be sent to the port Portus_PCO. Example 3: modified template Portus_PCO.send (modifies t_MeusTemplate(116) := {field1 := 117}); The template defined in example 2 is modified. When sent as shown, the values 117 and 116 will be sent to the port Portus_PCO. BNF definition of send