MailboxDropReason
このコンテンツはまだ日本語訳がありません。
MailboxDropReason =
"drop-head"|"drop-new"
Defined in: src/internal/Mailbox.ts:124
Why a mailbox discarded a message — the reason label on
actor_mailbox_dropped_total.
Deliberately a closed set of two rather than a free-form string, even for a
mailbox of your own: reason is a metric label, and an open one is a
cardinality vector (#745). That constraint got sharper once #658 removed
path — class and reason are now the family’s only dimensions, so a
free-form reason would be the single thing standing between it and
unbounded growth. Pick whichever describes what you did — you dropped the
oldest queued message, or you dropped the arriving one. Refusing a message
is not a drop; that throws instead.
Lives here rather than in BoundedMailboxOptions.ts despite typing an
option field there: it is the vocabulary of DropReportingMailbox,
which every mailbox may implement, and BoundedMailbox is only the
built-in one that does. The layering runs base → subclass, so the shared
word belongs at the base.