MailboxDropObserver
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MailboxDropObserver<
T> = (reason,envelope) =>void
Defined in: src/internal/Mailbox.ts:200
What a DropReportingMailbox hands an observer when it discards a message: the reason, and the envelope that was discarded (#773).
A type rather than an interface because it is one callback’s shape and
prescribes nothing anyone implements.
The envelope is the half that makes the loss recoverable: message and
sender are what a DeadLetter is built from, and context /
trace are what attribute it to the request that produced it. Before
#773 the seam carried the reason alone, so the only mailbox in the
framework that discards messages was also the only loss path that could
not say what it had lost.
Type Parameters
Section titled “Type Parameters”T = unknown
Parameters
Section titled “Parameters”reason
Section titled “reason”envelope
Section titled “envelope”Envelope<T>
Returns
Section titled “Returns”void