MQRecv class is used to get a message from a queue.
Message Selection Options: Correlation Id
Message Selection Options: Message Id
method %Get(ByRef Message As %String, timeout As %Integer = 0)
The %Get method reads from the queue specified in the %Init call.
The method takes one argument, the timeout in milliseconds. The timeout
refers to the time required to contact the server. %Get is
non-blocking (returns immediately whether or not there is a message on
method %GetStream(stream As %Stream, timeout As %Integer = 0)
If %Get gives a return code of 0, there was a failure or
timeout. The return string is empty. If %Get returns
1, the call was successful. The return string is empty or contains
a message depending on what the queue contained.
Identical to %Get except the queue message, if any, is returned in a file character stream object.
Data is read from the queue into a memory buffer, and the entire message written to the file
of the character stream object.