DropReportingMailbox
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Defined in: src/internal/Mailbox.ts:64
A mailbox that discards messages and is willing to say so.
Implement it on a Mailbox subclass of your own and the cell counts
its drops in actor_mailbox_dropped_total, with the same
{class, path, reason} labels the built-in bound produces. BoundedMailbox
implements it; nothing else needs to.
The cell probes for this method rather than testing
instanceof BoundedMailbox on purpose. Since #661 the base Mailbox is
public and subclassing it is a supported thing to do, so a queue that drops
for its own reasons should not be second-class in the telemetry.
Methods
Section titled “Methods”observeDrops()
Section titled “observeDrops()”observeDrops(
observer):void
Defined in: src/internal/Mailbox.ts:74
Register a drop observer. Called by the cell once, before the mailbox receives anything.
Additive, not a setter. Whatever the mailbox already reports —
BoundedMailboxOptions.onDrop, a previously registered observer — has to
keep firing. A caller who wired their own metric does not lose it
because the framework wired the stock one.
Parameters
Section titled “Parameters”observer
Section titled “observer”(reason) => void
Returns
Section titled “Returns”void