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dispatch: typed handlers, respond/defer/error, automatic ErrorResponse, watchdog

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src/dispatcher.ts routes a directive to capability.on(name | "*"), device.onDirective() or
device.onReportState(), with the payload checked by the descriptor of the interface. The
DirectiveContext answers with respond/report/defer/error; respond() and report() start from
device.state(). A handler or 1.x listener that throws or rejects is answered with INTERNAL_ERROR
(an AlexaError with itself) and reported through "error", never as an unhandled rejection.
Undeclared interface, unknown directive, AdjustMode on an unordered mode and a missing handler
get INVALID_DIRECTIVE, a bad payload INVALID_VALUE; a device with an "Event" or "ReportState"
listener keeps the answer to itself. Every answer passes the dispatcher: the first one per
correlationToken is published, a second is refused. No answer within answerWithinMs (6500,
0 = off, unref'd timer) sends INTERNAL_ERROR and emits "unanswered". A messageId that arrived
in the last 60 s is dropped. New: "unknownEndpoint", options answerUnknownEndpoints, publisher,
timers, and bridge.receive() to run a bridge without a broker. 168 tests pass (18 new).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
David 2026-09-28 19:49:41 +00:00
parent e0fe9d2812
commit feff828ec1
40 changed files with 2149 additions and 136 deletions
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17
dist/esm/device/Capability.js vendored
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@ -1,4 +1,5 @@
import { s } from "../registry/schema.js";
import { DeclarationError } from "../registry/types.js";
/** The same as a schema. The friendly names are checked with the instance, by the rules of the interface. */
export const commonOptions = s.object({
instance: s.optional(s.string()),
@ -15,6 +16,7 @@ export class Capability {
this.endpointId = "";
/** What the bridge logs about the declaration, once, when it answers a discovery. */
this.notes = [];
this.handlers = new Map();
this.instance = declared.instance ?? "";
this.friendlyNames = declared.friendlyNames ?? [];
this.retrievable = declared.retrievable ?? true;
@ -25,6 +27,21 @@ export class Capability {
get namespace() {
return this.descriptor.namespace;
}
on(name, handler) {
const names = Object.keys(this.descriptor.directives);
// An interface the library only names (tier 3) describes no directive: any name is taken
if (name !== "*" && this.descriptor.tier !== 3 && !names.includes(name)) {
throw new DeclarationError(this, `${name} is not a directive of the interface, which has ${names.join(", ") || "none"}`);
}
if (typeof handler !== "function")
throw new DeclarationError(this, `the handler of ${name} is a function`);
this.handlers.set(name, handler);
return this;
}
/** The handler on(name) registered, or the one of "*". */
handlerFor(name) {
return this.handlers.get(name) ?? this.handlers.get("*");
}
/** Mappings of "open", "close", "raise", "lower" and of states, when the declaration has any. */
get semantics() {
const { semantics } = this.options;