= PEEK MESSAGE( portId )

The PEEK MESSAGE function can be used to wait for a message on a DOJO port. The function returns FALSE if the the message port is empty. On the contrary, if it returns TRUE, it is possible to fetch the message using the GET MESSAGE command.

Note that the message port behaves like a queue, that is, the first message that is inserted is the first that is retrieved. Therefore, if a program sends three messages in a row to the attention of the port of another, the receiving program will receive the three messages in the same order. Obviously, if several programs do the same thing, the messages will be interspersed but, in the end, they will be in the same order.

  sessionId = LOGIN( "user", "password" )
  port = FIND( sessionId, "user2", "testApp" )
  IF PEEK MESSAGE( port ) THEN
     PRINT "A message is arrived!"
  ENDIF

 PkMsg

• Commodore 64
• Commodore 64+REU
• TRS-80 Color Computer 3
• TRS-80 Color Computer

DOJO PEEK MESSAGE

If you have encountered a problem using this command, if you think there is a bug or the explanation is unclear, please open an issue for this keyword on GitHub. Thank you!