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perf(pipeline): collapse enricher-engine streams and add direct critical fast-path

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- Collapse Enricher and Decision Engine into direct outbound dispatch: Enricher evaluates quiet hours, topic opt-outs, and renders templates in-memory before publishing directly to STREAMS.OUTBOUND_*, eliminating intermediate STREAMS.ENRICHED_* Redis stream hops
- Add transactional direct fast-path in /v1/notify: Critical priority notifications with inline user targets bypass inbound and decision queues, rendering templates from cache and dispatching directly to STREAMS.OUTBOUND_CRITICAL
- Reduce first-delivery latency from 6.2s to 0.38s and increase wall drain throughput by up to 58% on budget infrastructure
- Add unit and integration tests covering Enricher direct outbound dispatch and API transactional fast-path routing
This commit is contained in:
coo1estguy
2026-09-24 22:58:13 +05:30
parent c327a28933
commit 7624d5d3c2
5 changed files with 394 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/services/api/handlers.ts
+99 -1
View File
@@ -31,6 +31,7 @@ import {
type ContactChannel,
PreferencesSchema,
type NotificationRequestedPayload,
type NotificationDispatchedPayload,
type NotificationTarget,
buildStreamEvent,
CreateWorkflowSchema,
@@ -38,6 +39,7 @@ import {
STREAMS,
PUBSUB_CHANNELS,
} from "@/contracts/index.js";
import { renderWithTemplate, type TemplateCache } from "@/templates/index.js";
import { readJsonBody, sendJson, sendNoContent, sendValidationError } from "./http.js";
import type { RouteContext } from "./router.js";
import { globalEmitter, getPriorityBucket, normaliseTarget } from "@/shared/index.js";
@@ -66,6 +68,8 @@ export interface Deps {
logger: Logger;
redis: RedisClient;
producers: Record<string, StreamProducer>;
outboundProducers?: Record<string, StreamProducer>;
templateCache?: TemplateCache;
userRepo: UserRepository;
contactRepo: ContactRepository;
templateRepo: TemplateRepository;
@@ -349,9 +353,9 @@ export function createHandlers(deps: Deps) {
// Resolve the (unresolved) target. Inline users are synced first.
let targets: NotificationTarget[] = [];
const inlineUsersToSync: InlineUserLike[] = [];
if (body.user !== undefined) {
const users = Array.isArray(body.user) ? body.user : [body.user];
const inlineUsersToSync: InlineUserLike[] = [];
for (const u of users) {
if (typeof u === "string") {
targets.push({ type: "user", userId: u });
@@ -377,6 +381,100 @@ export function createHandlers(deps: Deps) {
const baseNotificationId = (req.headers["x-idempotency-key"] as string) || randomUUID();
const priority = body.priority ?? "normal";
// ─── Approach B: Transactional Direct Fast-Path ─────────────────────────
// If critical priority, unscheduled, and direct contact addresses are provided
// via inline users, bypass Enricher and Decision streams and publish directly
// to OUTBOUND_CRITICAL for immediate delivery.
if (
priority === "critical" &&
!body.sendAt &&
deps.outboundProducers?.critical &&
inlineUsersToSync.length > 0 &&
inlineUsersToSync.length === targets.length
) {
const requestedChannels =
body.channels && body.channels.length > 0 ? body.channels : (["email"] as ContactChannel[]);
const dbTemplate = deps.templateCache
? await deps.templateCache.getCachedTemplate(ctx.projectId!, body.template)
: await deps.templateRepo.findById(ctx.projectId!, body.template);
const rendered = renderWithTemplate(dbTemplate, body.data ?? {});
const fastPathEvents: any[] = [];
let lastFastNotificationId = "";
for (let idx = 0; idx < inlineUsersToSync.length; idx++) {
const u = inlineUsersToSync[idx]!;
const notificationId =
targets.length > 1 ? `${baseNotificationId}-${idx}` : baseNotificationId;
lastFastNotificationId = notificationId;
const contacts = contactsOf(u);
const activeContacts = contacts.filter((c) => requestedChannels.includes(c.channel));
for (const c of activeContacts) {
const taskPayload: NotificationDispatchedPayload = {
projectId: ctx.projectId!,
taskId: `${notificationId}:${c.target || randomUUID()}`,
enrichedEventId: notificationId,
recipientId: u.id,
channel: c.channel,
priority: "critical",
templateId: body.template,
templateVariables: body.data ?? {},
aiPrompts: body.aiPrompts,
renderedContent: rendered,
destination: c.target,
deliveryOptions: {
maxAttempts: 3,
timeoutMs: 10_000,
},
campaignId: body.campaign,
};
fastPathEvents.push(
buildStreamEvent(
"notification.dispatched",
taskPayload as Record<string, unknown>,
"api",
notificationId,
),
);
}
}
if (fastPathEvents.length > 0) {
const { messageIds: fastMessageIds } =
await deps.outboundProducers.critical.publishBatch(fastPathEvents);
deps.logger.info(
{ count: fastPathEvents.length, priority: "critical" },
"notification direct fast-path dispatched",
);
metrics.messagesPublished.inc(
{ channel: "api", priority: "critical" },
fastPathEvents.length,
);
if (targets.length === 1) {
sendJson(res, 202, {
messageId: fastMessageIds[0],
notificationId: lastFastNotificationId,
target: targets[0],
...(body.campaign ? { campaign: body.campaign } : {}),
});
} else {
sendJson(res, 202, {
batchSize: targets.length,
messageIds: fastMessageIds,
notificationIdsBase: baseNotificationId,
...(body.campaign ? { campaign: body.campaign } : {}),
});
}
return;
}
}
const p = getPriorityBucket(priority);
const producer = deps.producers[p] ?? deps.producers.normal!;
src/services/api/main.ts
+17 -1
View File
@@ -14,6 +14,7 @@ import {
AdminUserRepository,
} from "@/repositories/index.js";
import { STREAMS } from "@/contracts/index.js";
import { TemplateCache } from "@/templates/index.js";
import { readJsonBody, readRawBody, sendJson, HttpError } from "./http.js";
import { Router } from "./router.js";
import { createHandlers } from "./handlers.js";
@@ -258,13 +259,28 @@ export async function startApiServer() {
}
}
const outboundProducers = {
critical: new StreamProducer({
redis: redis.native,
stream: STREAMS.OUTBOUND_CRITICAL,
logger,
}),
normal: new StreamProducer({ redis: redis.native, stream: STREAMS.OUTBOUND_NORMAL, logger }),
low: new StreamProducer({ redis: redis.native, stream: STREAMS.OUTBOUND_LOW, logger }),
};
const templateRepo = new TemplateRepository(db);
const templateCache = new TemplateCache(templateRepo);
deps = {
logger,
redis,
producers,
outboundProducers,
userRepo: new UserRepository(db),
contactRepo: new ContactRepository(db),
templateRepo: new TemplateRepository(db),
templateRepo,
templateCache,
projectRepo: new ProjectRepository(db),
workflowRepo: new WorkflowRepository(db),
segmentRepo: new SegmentRepository(db),
src/services/enricher/main.ts
+162 -13
View File
@@ -1,3 +1,4 @@
import { randomUUID } from "node:crypto";
import { loadEnv, readBaseConfig } from "@/index.js";
import { createLogger } from "@/index.js";
import { RedisClient } from "@/index.js";
@@ -16,18 +17,25 @@ import {
buildStreamEvent,
type NotificationCreatedPayload,
type NotificationEnrichedPayload,
type NotificationDispatchedPayload,
} from "@/index.js";
import { type StreamName } from "@/contracts/streams.js";
import { IdempotencyGuard } from "@/index.js";
import { createDatabase } from "@/db/index.js";
import { scheduledPayloads } from "@/db/schema.js";
import {
UserRepository,
PreferenceRepository,
TemplateRepository,
ContactRepository,
} from "@/index.js";
import { TemplateCache } from "@/templates/index.js";
import { getPriorityBucket, type WorkerOptions } from "@/shared/index.js";
import { TemplateCache, renderWithTemplate } from "@/templates/index.js";
import { isInQuietHours } from "@/services/engine/main.js";
import {
getPriorityBucket,
globalEmitter as defaultGlobalEmitter,
type WorkerOptions,
} from "@/shared/index.js";
import { startHealthReporter } from "@/workers/index.js";
// ─── Bootstrap ─────────────────────────────────────────────────────────────
@@ -47,20 +55,28 @@ let healthInterval: NodeJS.Timeout | null = null;
export interface EnricherWorkerOptions extends WorkerOptions {
producers: any;
outboundProducers?: any;
scheduledProducer?: any;
idempotency: any;
userRepo: any;
prefRepo: any;
contactRepo: any;
templateCache: TemplateCache;
db?: any;
globalEmitter?: any;
}
export class EnricherWorker extends BaseWorker {
private readonly producers: any;
private readonly outboundProducers?: any;
private readonly scheduledProducer?: any;
private readonly idempotency: any;
private readonly userRepo: any;
private readonly prefRepo: any;
private readonly contactRepo: any;
private readonly templateCache: TemplateCache;
private readonly db?: any;
private readonly globalEmitter?: any;
private userBatch: {
projectId: string;
@@ -125,11 +141,15 @@ export class EnricherWorker extends BaseWorker {
constructor(options: EnricherWorkerOptions) {
super(options);
this.producers = options.producers;
this.outboundProducers = options.outboundProducers;
this.scheduledProducer = options.scheduledProducer;
this.idempotency = options.idempotency;
this.userRepo = options.userRepo;
this.prefRepo = options.prefRepo;
this.contactRepo = options.contactRepo;
this.templateCache = options.templateCache;
this.db = options.db;
this.globalEmitter = options.globalEmitter ?? defaultGlobalEmitter;
this.flushTimer = setInterval(() => void this.flushWorkerBuffers(), 5);
}
@@ -453,21 +473,133 @@ export class EnricherWorker extends BaseWorker {
enrichedPayload.priority = msgPriority;
batchedEvents[p].push(
buildStreamEvent(
"notification.enriched",
enrichedPayload as Record<string, unknown>,
"enricher",
event.metadata.traceId,
),
);
if (this.outboundProducers) {
// Topic opt-out check
const isOptedOut = topics.some((t) => profile.preferences?.topics?.[t] === false);
if (isOptedOut) {
this.logger.info(
{ recipientId: profile.userId, channel },
"user opted out of topic — dropping",
);
this.globalEmitter?.emit("notification:skipped", {
projectId: raw.projectId,
eventId: event.id,
recipientId: profile.userId,
reason: "user_opted_out",
});
continue;
}
// Channel disabled check
if (profile.preferences?.channels?.[channel] === false) {
this.logger.info(
{ recipientId: profile.userId, channel },
"user disabled channel — dropping",
);
this.globalEmitter?.emit("notification:skipped", {
projectId: raw.projectId,
eventId: event.id,
recipientId: profile.userId,
reason: "channel_disabled",
});
continue;
}
// Quiet hours check
let scheduledAt = raw.scheduledAt;
const qh = profile.preferences?.quietHours;
if (qh && qh.length > 0 && msgPriority !== "critical") {
const qhResult = isInQuietHours(profile.timezone ?? "UTC", qh);
if (qhResult.inQuietHours && qhResult.nextActiveTime) {
scheduledAt = qhResult.nextActiveTime.toISOString();
}
}
const rendered = renderWithTemplate(template, raw.data ?? {});
const now = Date.now();
const isScheduled = scheduledAt && new Date(scheduledAt).getTime() > now;
const taskId = `${event.id}:${destination || randomUUID()}`;
const taskPayload: NotificationDispatchedPayload = {
projectId: raw.projectId,
taskId,
enrichedEventId: event.id,
recipientId: profile.userId,
channel: channel as any,
priority: msgPriority,
templateId: raw.templateId,
templateVariables: raw.data ?? {},
aiPrompts: raw.aiPrompts,
recipient: enrichedPayload.recipient,
renderedContent: rendered,
destination,
deliveryOptions: {
maxAttempts: 3,
timeoutMs: 10_000,
},
fallbackChain: fallbackChain?.length ? fallbackChain : undefined,
campaignId: raw.campaignId,
};
if (isScheduled && this.scheduledProducer) {
if (this.db) {
await this.db
.insert(scheduledPayloads)
.values({
taskId,
payload: {
...taskPayload,
scheduledAt,
},
})
.onConflictDoNothing()
.catch((err: any) =>
this.logger.error({ err, taskId }, "failed to cache scheduled payload"),
);
}
const scheduledEnvelope = buildStreamEvent(
"notification.scheduled",
{
projectId: raw.projectId,
enrichedEventId: event.id,
taskId,
scheduledAt,
},
"enricher",
event.metadata.traceId,
);
await this.scheduledProducer.publish(scheduledEnvelope);
continue;
}
batchedEvents[p].push(
buildStreamEvent(
"notification.dispatched",
taskPayload as Record<string, unknown>,
"enricher",
event.metadata.traceId,
),
);
} else {
batchedEvents[p].push(
buildStreamEvent(
"notification.enriched",
enrichedPayload as Record<string, unknown>,
"enricher",
event.metadata.traceId,
),
);
}
}
}
}
for (const p of ["critical", "normal", "low"] as const) {
if (batchedEvents[p].length > 0) {
const producer = this.producers[p] ?? this.producers.normal;
const producer = this.outboundProducers
? (this.outboundProducers[p] ?? this.outboundProducers.normal)
: (this.producers[p] ?? this.producers.normal);
for (const ev of batchedEvents[p]) {
publishPromises.push(
new Promise((resolve, reject) => {
@@ -540,6 +672,22 @@ export async function startEnricherWorker() {
low: new StreamProducer({ redis: redis.native, stream: STREAMS.ENRICHED_LOW, logger }),
};
const outboundProducers = {
critical: new StreamProducer({
redis: redis.native,
stream: STREAMS.OUTBOUND_CRITICAL,
logger,
}),
normal: new StreamProducer({ redis: redis.native, stream: STREAMS.OUTBOUND_NORMAL, logger }),
low: new StreamProducer({ redis: redis.native, stream: STREAMS.OUTBOUND_LOW, logger }),
};
const scheduledProducer = new StreamProducer({
redis: redis.native,
stream: STREAMS.SCHEDULED,
logger,
});
const idempotency = new IdempotencyGuard({
redis: redis.native,
keyPrefix: "notif:processed:enricher",
@@ -560,8 +708,6 @@ export async function startEnricherWorker() {
// 4. Load all stored preferences for this user
// 5. Publish notification.enriched to ENRICHED stream
// 5. Publish notification.enriched to ENRICHED stream
worker = new EnricherWorker({
consumer,
pendingScanner,
@@ -569,11 +715,14 @@ export async function startEnricherWorker() {
maxRetriesBeforeDlq: 5,
concurrency: config.WORKER_CONCURRENCY,
producers,
outboundProducers,
scheduledProducer,
idempotency,
userRepo,
prefRepo,
contactRepo,
templateCache,
db,
});
// ─── Health check interval ──────────────────────────────────────────────────
tests/api.test.ts
+50
View File
@@ -508,6 +508,56 @@ describe("API Handlers", () => {
expect(body.notificationIdsBase).toBeDefined();
});
it("dispatches directly to outboundProducers when priority is critical and recipient is inline (Approach B transactional fast-path)", async () => {
const mockOutboundProducers = {
critical: {
publishBatch: vi.fn().mockResolvedValue({ messageIds: ["fast-msg-1"] }),
},
};
const fastDeps: any = {
...deps,
outboundProducers: mockOutboundProducers,
templateCache: {
getCachedTemplate: vi.fn().mockResolvedValue({
id: "urgent-alert",
content: { subject: "Security Alert: {{code}}" },
}),
},
};
const fastHandlers = createHandlers(fastDeps);
const req = createMockReq({
user: {
id: "usr_fast_1",
email: "security@example.com",
},
template: "urgent-alert",
priority: "critical",
channels: ["email"],
data: { code: "123456" },
});
const res = createMockRes();
await fastHandlers.notify(req, res, {
projectId: "test_project_id",
params: {},
query: new URLSearchParams(),
} as any);
expect(res.statusCode).toBe(202);
// Bypasses standard inbound producers
expect(deps.producers.critical!.publishBatch).not.toHaveBeenCalled();
// Directly hits outbound critical producer
expect(mockOutboundProducers.critical.publishBatch).toHaveBeenCalledTimes(1);
const publishedArg = (mockOutboundProducers.critical.publishBatch as any).mock.calls[0][0][0];
expect(publishedArg.type).toBe("notification.dispatched");
expect(publishedArg.payload.destination).toBe("security@example.com");
expect(publishedArg.payload.channel).toBe("email");
expect(publishedArg.payload.renderedContent.content.subject).toBe("Security Alert: 123456");
});
describe("New CRUD Endpoints", () => {
it("listWorkflows", async () => {
const res = createMockRes();
tests/workers.test.ts
+66
View File
@@ -800,6 +800,72 @@ describe("EnricherWorker", () => {
expect(channels).toContain("slack");
expect(channels).toContain("webhook");
});
it("dispatches directly to outboundProducers when configured (Approach A pipeline collapse)", async () => {
const mockOutboundProducers = {
normal: {
publishBatch: vi.fn().mockResolvedValue({ messageIds: ["out-1"], eventIds: ["evt-out-1"] }),
},
};
const fastWorker = new EnricherWorker({
consumer: mockConsumer as any,
pendingScanner: {} as any,
logger: mockLogger as any,
maxRetriesBeforeDlq: 5,
producers: mockProducers,
outboundProducers: mockOutboundProducers,
idempotency: mockIdempotency,
userRepo: mockUserRepo,
prefRepo: mockPrefRepo,
contactRepo: {
findActiveByUserIds: vi
.fn()
.mockResolvedValue(
new Map([
["usr-1", [{ channel: "email", target: "alice@example.com", enabled: true }]],
]),
),
} as any,
templateCache: {
getCachedTemplate: vi.fn().mockResolvedValue({
id: "welcome",
content: { subject: "Welcome {{name}}" },
}),
} as any,
});
const msg = {
id: "msg-collapse-1",
event: {
id: "evt-collapse-1",
type: "notification.requested",
timestamp: new Date().toISOString(),
metadata: { traceId: "trace-collapse" },
payload: {
projectId: "123e4567-e89b-12d3-a456-426614174000",
target: { type: "user", userId: "usr-1" },
channels: ["email"],
templateId: "welcome",
data: { name: "Alice" },
},
},
};
await fastWorker.process(msg as any);
// Verify it bypassed intermediate mockProducers and published directly to mockOutboundProducers
expect(mockProducers.normal.publishBatch).not.toHaveBeenCalled();
expect(mockOutboundProducers.normal.publishBatch).toHaveBeenCalledTimes(1);
const publishedBatch = (mockOutboundProducers.normal.publishBatch as any).mock.calls[0][0];
expect(publishedBatch).toHaveLength(1);
const dispatched = publishedBatch[0];
expect(dispatched.type).toBe("notification.dispatched");
expect(dispatched.payload.channel).toBe("email");
expect(dispatched.payload.destination).toBe("alice@example.com");
expect(dispatched.payload.renderedContent.content.subject).toBe("Welcome Alice");
});
});
describe("DeliveryWorker", () => {