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refactor(server): share event stream encoding (#36484)

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Kit Langton 2026-07-12 11:48:52 -04:00 • committed by GitHub
commit 7913c4a490
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9 changed files with 483 additions and 102 deletions
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28
packages/core/src/event.ts
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@ -1,6 +1,6 @@
export * as EventV2 from "./event"
import { Cause, Context, DateTime, Effect, Layer, Option, PubSub, Queue, Schema, Stream } from "effect"
import { Cause, Context, DateTime, Effect, Layer, Option, PubSub, Schema, Stream } from "effect"
import { Event } from "@opencode-ai/schema/event"
import type { Data, Definition, Payload } from "@opencode-ai/schema/event"
import type { EventLog } from "@opencode-ai/schema/event-log"
@ -89,11 +89,6 @@ const decodeSerializedEvent = (event: SerializedEvent): Payload => {
}
}
export class SubscriberOverflowError extends Schema.TaggedErrorClass<SubscriberOverflowError>()(
"EventV2.SubscriberOverflow",
{ capacity: Schema.Int },
) {}
export const versionedType = Event.versionedType
export const durable = Event.durable
export const ephemeral = Event.ephemeral
@ -167,27 +162,6 @@ export interface Interface {
export class Service extends Context.Service<Service, Interface>()("@opencode/Event") {}
export const liveBounded = (
events: Interface,
options: { readonly capacity: number; readonly accept?: (event: Payload) => boolean },
) =>
Effect.gen(function* () {
const queue = yield* Queue.dropping<Payload, SubscriberOverflowError>(options.capacity)
const unsubscribe = yield* events.listen((event) =>
options.accept && !options.accept(event)
? Effect.void
: Queue.offer(queue, event).pipe(
Effect.flatMap((accepted) =>
accepted
? Effect.void
: Queue.fail(queue, new SubscriberOverflowError({ capacity: options.capacity })).pipe(Effect.asVoid),
),
),
)
yield* Effect.addFinalizer(() => unsubscribe.pipe(Effect.andThen(Queue.shutdown(queue)), Effect.asVoid))
return Stream.fromQueue(queue)
})
export interface LayerOptions {
readonly beforeAggregateRead?: (aggregateID: string) => Effect.Effect<void>
/** Maximum durable rows read per page while replaying or tailing an aggregate log. */