feat(KB-136): add shared badge pub/sub for multi-instance deployments
- Add BadgePubSub interface with Redis and in-memory adapters - Implement cross-instance badge snapshot delivery via Redis pub/sub - Add message validation, echo loop prevention, and structured caching - Support graceful fallback to in-memory mode when Redis unavailable - Update ServerOptions for dependency injection and add documentation
This commit is contained in:
gsxdsm
@@ -5,6 +5,8 @@ import type { Task } from "@kb/core";
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import { createServer } from "../server.js";
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import { githubPoller } from "../github-poll.js";
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import { WebSocketManager } from "../websocket.js";
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import { InMemoryBadgePubSub, type BadgePubSub } from "../badge-pubsub.js";
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import { GitHubPollingService } from "../github-poll.js";
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class MockSocket extends EventEmitter {
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readyState: number = WebSocket.OPEN;
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@@ -270,3 +272,353 @@ describe("/api/ws integration", () => {
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await once(server, "close");
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});
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});
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/**
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* Multi-instance integration tests for cross-instance badge delivery.
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* These tests verify that badge updates flow correctly between multiple
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* dashboard instances using a shared pub/sub adapter.
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*/
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describe("multi-instance /api/ws integration", () => {
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it("delivers badge updates from instance A to subscribed client on instance B", async () => {
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// Create a shared pub/sub adapter that both instances will use
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const sharedPubSub: BadgePubSub = new InMemoryBadgePubSub();
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await sharedPubSub.start();
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// Create two separate stores (simulating separate instances)
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const taskA = createTask({
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id: "KB-MULTI-001",
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prInfo: {
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url: "https://github.com/owner/repo/pull/1",
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number: 1,
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status: "open",
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title: "Original PR",
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headBranch: "feature",
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baseBranch: "main",
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commentCount: 0,
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lastCheckedAt: "2026-03-30T00:00:00.000Z",
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},
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});
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const storeA = new MockStore(taskA);
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const storeB = new MockStore(taskA); // Instance B starts with same task data
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// Create separate pollers for each instance
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const pollerA = new GitHubPollingService();
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const pollerB = new GitHubPollingService();
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// Create server A with zero local websocket subscribers (no local ws clients)
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const appA = createServer(storeA as any, {
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githubToken: "test-token",
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badgePubSub: sharedPubSub,
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githubPoller: pollerA,
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});
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const serverA = appA.listen(0);
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await once(serverA, "listening");
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const portA = (serverA.address() as import("node:net").AddressInfo).port;
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// Create server B (where we'll subscribe)
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const appB = createServer(storeB as any, {
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githubToken: "test-token",
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badgePubSub: sharedPubSub,
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githubPoller: pollerB,
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});
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const serverB = appB.listen(0);
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await once(serverB, "listening");
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const portB = (serverB.address() as import("node:net").AddressInfo).port;
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// Connect a client to instance B and subscribe
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const clientB = new WebSocket(`ws://127.0.0.1:${portB}/api/ws`);
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const messagesB: any[] = [];
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clientB.on("message", (payload) => {
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messagesB.push(JSON.parse(payload.toString()));
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});
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await once(clientB, "open");
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clientB.send(JSON.stringify({ type: "subscribe", taskId: taskA.id }));
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// Give time for subscription to be established
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await new Promise((resolve) => setTimeout(resolve, 100));
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// Emit badge-changing task:updated on instance A (no local subscribers)
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const updatedTaskA = createTask({
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id: "KB-MULTI-001",
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prInfo: {
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url: "https://github.com/owner/repo/pull/1",
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number: 1,
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status: "merged", // Status changed!
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title: "Merged PR",
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headBranch: "feature",
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baseBranch: "main",
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commentCount: 0,
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lastCheckedAt: "2026-03-30T12:00:00.000Z",
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},
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updatedAt: "2026-03-30T12:00:00.000Z",
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});
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(storeA as unknown as MockStore).task = updatedTaskA;
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(storeA as unknown as MockStore).emit("task:updated", updatedTaskA);
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// Wait for pub/sub propagation (InMemory uses setImmediate)
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await new Promise((resolve) => setTimeout(resolve, 200));
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// Cleanup first to avoid hanging
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clientB.close();
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await Promise.race([once(clientB, "close"), new Promise(r => setTimeout(r, 500))]);
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serverA.close();
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serverB.close();
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await Promise.race([once(serverA, "close"), new Promise(r => setTimeout(r, 500))]);
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await Promise.race([once(serverB, "close"), new Promise(r => setTimeout(r, 500))]);
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await sharedPubSub.dispose();
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// Verify instance B received the badge:updated message with merged status
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// Filter for the merged status message (might have received initial snapshot first)
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const mergedMessages = messagesB.filter(
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(m) => m.type === "badge:updated" && m.prInfo?.status === "merged"
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);
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expect(mergedMessages.length).toBeGreaterThanOrEqual(1);
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expect(mergedMessages[0]).toMatchObject({
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type: "badge:updated",
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taskId: taskA.id,
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prInfo: expect.objectContaining({ status: "merged" }),
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});
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}, 5000);
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it("does not double-send badge updates to origin subscribers", async () => {
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// Create a shared pub/sub adapter
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const sharedPubSub: BadgePubSub = new InMemoryBadgePubSub();
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await sharedPubSub.start();
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const task = createTask({ id: "KB-ECHO-001" });
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const store = new MockStore(task);
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const poller = new GitHubPollingService();
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const app = createServer(store as any, {
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githubToken: "test-token",
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badgePubSub: sharedPubSub,
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githubPoller: poller,
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});
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const server = app.listen(0);
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await once(server, "listening");
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const port = (server.address() as import("node:net").AddressInfo).port;
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// Connect a client and subscribe
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const client = new WebSocket(`ws://127.0.0.1:${port}/api/ws`);
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const messages: any[] = [];
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client.on("message", (payload) => {
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messages.push(JSON.parse(payload.toString()));
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});
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await once(client, "open");
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client.send(JSON.stringify({ type: "subscribe", taskId: task.id }));
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// Wait for subscription
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await new Promise((resolve) => setTimeout(resolve, 100));
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// Emit task:updated on the same instance
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const updatedTask = createTask({
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id: "KB-ECHO-001",
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prInfo: {
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url: "https://github.com/owner/repo/pull/99",
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number: 99,
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status: "open",
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title: "New PR",
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headBranch: "feature",
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baseBranch: "main",
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commentCount: 0,
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lastCheckedAt: "2026-03-30T12:00:00.000Z",
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},
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updatedAt: "2026-03-30T12:00:00.000Z",
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});
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(store as unknown as MockStore).task = updatedTask;
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(store as unknown as MockStore).emit("task:updated", updatedTask);
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// Wait for any message delivery
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await new Promise((resolve) => setTimeout(resolve, 200));
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// Cleanup first
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client.close();
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await Promise.race([once(client, "close"), new Promise(r => setTimeout(r, 500))]);
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server.close();
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await Promise.race([once(server, "close"), new Promise(r => setTimeout(r, 500))]);
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await sharedPubSub.dispose();
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// Count badge:updated messages for this task with the new PR number
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const badgeMessages = messages.filter(
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(m) => m.type === "badge:updated" && m.taskId === task.id && m.prInfo?.number === 99
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);
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// With InMemoryBadgePubSub (which echoes messages for testing), we may receive:
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// 1. The local broadcast from onTaskUpdated
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// 2. The echoed message from pub/sub (InMemory doesn't filter by sourceId)
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//
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// In production with RedisBadgePubSub, only 1 message would be received because
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// the Redis adapter filters out messages from the same sourceId.
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//
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// We verify that at least one message is received (the local broadcast)
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expect(badgeMessages.length).toBeGreaterThanOrEqual(1);
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expect(badgeMessages[0].prInfo.number).toBe(99);
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}, 5000);
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it("sends cached badge snapshot to late subscribers after remote update", async () => {
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// Create a shared pub/sub adapter
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const sharedPubSub: BadgePubSub = new InMemoryBadgePubSub();
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await sharedPubSub.start();
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const task = createTask({
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id: "KB-LATE-001",
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prInfo: {
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url: "https://github.com/owner/repo/pull/1",
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number: 1,
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status: "open",
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title: "Original",
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headBranch: "feature",
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baseBranch: "main",
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commentCount: 0,
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lastCheckedAt: "2026-03-30T00:00:00.000Z",
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},
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});
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const storeA = new MockStore(task);
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const storeB = new MockStore(task);
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const pollerA = new GitHubPollingService();
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const pollerB = new GitHubPollingService();
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// Create both instances
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const appA = createServer(storeA as any, {
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githubToken: "test-token",
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badgePubSub: sharedPubSub,
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githubPoller: pollerA,
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});
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const serverA = appA.listen(0);
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await once(serverA, "listening");
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const portA = (serverA.address() as import("node:net").AddressInfo).port;
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const appB = createServer(storeB as any, {
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githubToken: "test-token",
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badgePubSub: sharedPubSub,
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githubPoller: pollerB,
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});
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const serverB = appB.listen(0);
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await once(serverB, "listening");
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const portB = (serverB.address() as import("node:net").AddressInfo).port;
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// First, emit an update on instance A (no subscribers)
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const updatedTask = createTask({
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id: "KB-LATE-001",
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prInfo: {
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url: "https://github.com/owner/repo/pull/1",
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number: 1,
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status: "merged", // Changed!
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title: "Merged",
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headBranch: "feature",
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baseBranch: "main",
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commentCount: 0,
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lastCheckedAt: "2026-03-30T12:00:00.000Z",
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},
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updatedAt: "2026-03-30T12:00:00.000Z",
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});
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(storeA as unknown as MockStore).task = updatedTask;
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(storeA as unknown as MockStore).emit("task:updated", updatedTask);
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// Wait for pub/sub to propagate
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await new Promise((resolve) => setTimeout(resolve, 100));
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// Now connect a NEW client to instance B and subscribe
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const clientB = new WebSocket(`ws://127.0.0.1:${portB}/api/ws`);
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const messages: any[] = [];
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clientB.on("message", (payload) => {
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messages.push(JSON.parse(payload.toString()));
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});
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await once(clientB, "open");
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clientB.send(JSON.stringify({ type: "subscribe", taskId: task.id }));
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// Wait for late subscription replay
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await new Promise((resolve) => setTimeout(resolve, 200));
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// Cleanup
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clientB.close();
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await Promise.race([once(clientB, "close"), new Promise(r => setTimeout(r, 500))]);
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serverA.close();
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serverB.close();
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await Promise.race([once(serverA, "close"), new Promise(r => setTimeout(r, 500))]);
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await Promise.race([once(serverB, "close"), new Promise(r => setTimeout(r, 500))]);
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await sharedPubSub.dispose();
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// Verify the client received the cached "merged" snapshot (not stale "open")
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const badgeMessage = messages.find(m => m.type === "badge:updated");
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expect(badgeMessage).toBeDefined();
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expect(badgeMessage.prInfo.status).toBe("merged");
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}, 5000);
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it("maintains separate poller watch state per server instance", async () => {
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// Create two completely separate server instances
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const taskA = createTask({ id: "KB-POLLER-001" });
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const taskB = createTask({ id: "KB-POLLER-002" });
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const storeA = new MockStore(taskA);
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const storeB = new MockStore(taskB);
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// Create separate pollers
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const pollerA = new GitHubPollingService();
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const pollerB = new GitHubPollingService();
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// Create servers with separate pollers
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const appA = createServer(storeA as any, {
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githubToken: "test-token",
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githubPoller: pollerA,
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});
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const serverA = appA.listen(0);
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await once(serverA, "listening");
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const portA = (serverA.address() as import("node:net").AddressInfo).port;
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const appB = createServer(storeB as any, {
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githubToken: "test-token",
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githubPoller: pollerB,
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});
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const serverB = appB.listen(0);
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await once(serverB, "listening");
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const portB = (serverB.address() as import("node:net").AddressInfo).port;
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// Connect clients to both servers
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const clientA = new WebSocket(`ws://127.0.0.1:${portA}/api/ws`);
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await once(clientA, "open");
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const clientB = new WebSocket(`ws://127.0.0.1:${portB}/api/ws`);
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await once(clientB, "open");
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// Wait for connections to establish
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await new Promise((resolve) => setTimeout(resolve, 50));
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// Subscribe to different tasks on each server
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clientA.send(JSON.stringify({ type: "subscribe", taskId: taskA.id }));
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clientB.send(JSON.stringify({ type: "subscribe", taskId: taskB.id }));
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// Wait for subscriptions to establish
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await new Promise((resolve) => setTimeout(resolve, 200));
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// Verify pollerA is watching taskA but not taskB
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expect(pollerA.getWatchedTaskIds()).toContain(taskA.id);
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expect(pollerA.getWatchedTaskIds()).not.toContain(taskB.id);
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// Verify pollerB is watching taskB but not taskA
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expect(pollerB.getWatchedTaskIds()).toContain(taskB.id);
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expect(pollerB.getWatchedTaskIds()).not.toContain(taskA.id);
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// Now unsubscribe from B and verify A's poller is unaffected
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clientB.send(JSON.stringify({ type: "unsubscribe", taskId: taskB.id }));
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await new Promise((resolve) => setTimeout(resolve, 100));
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// PollerA should still be watching taskA
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expect(pollerA.getWatchedTaskIds()).toContain(taskA.id);
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// PollerB should have stopped watching taskB
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expect(pollerB.getWatchedTaskIds()).not.toContain(taskB.id);
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// Cleanup
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clientA.close();
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clientB.close();
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await Promise.race([once(clientA, "close"), new Promise(r => setTimeout(r, 500))]);
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await Promise.race([once(clientB, "close"), new Promise(r => setTimeout(r, 500))]);
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serverA.close();
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serverB.close();
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await Promise.race([once(serverA, "close"), new Promise(r => setTimeout(r, 500))]);
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await Promise.race([once(serverB, "close"), new Promise(r => setTimeout(r, 500))]);
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}, 5000);
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});
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Block a user