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Improve jitter in readmodel-postgres adapter (#2194)
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2 changes: 1 addition & 1 deletion
2
packages/runtime/adapters/readmodel-adapters/readmodel-postgresql/src/disconnect.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| import { | ||
| default as factory, | ||
| isPostgres, | ||
| adapters, | ||
| } from '../readmodel-test-utils' | ||
| type UnPromise<T> = T extends Promise<T> ? T : never | ||
| const maybeDescribe = isPostgres() ? describe : describe.skip | ||
| jest.setTimeout(60000) | ||
|
|
||
| maybeDescribe('Postgres reconnections with delay', () => { | ||
| const uniqueName = 'postgres-reconnections-delay' as const | ||
| const readModelName = 'PostgresReconnectionsDelay' as const | ||
| const getDelay = (delay: number | null) => (delay != null ? +delay : 0) | ||
| const delayFunction = async (delay: number) => | ||
| await new Promise((resolve) => setTimeout(resolve, getDelay(delay))) | ||
| const eventType = 'EVENT_TYPE' | ||
| const getNotificationObj = ( | ||
| isNext: boolean, | ||
| notificationExtraPayload?: object | ||
| ) => ({ | ||
| eventSubscriber: readModelName, | ||
| initiator: isNext ? 'read-model-next' : 'command', | ||
| notificationId: `NT-${Date.now()}${Math.floor(Math.random() * 1000000)}`, | ||
| sendTime: Date.now(), | ||
| ...(notificationExtraPayload != null ? notificationExtraPayload : {}), | ||
| }) | ||
| const subscriptionOptions = { eventTypes: [eventType], aggregateIds: null } | ||
| const currentConnections = new Set() | ||
| const currentBuilders = new Set() | ||
| let adapter: typeof adapters[typeof uniqueName] | ||
| let baseConnection: UnPromise<ReturnType<typeof adapter['connect']>> | ||
| const connectionsDelays = new WeakMap<typeof baseConnection, Array<number>>() | ||
| let flushWorkers: Function | ||
| let buildOnConnection: Function | ||
| let performWorkers = true | ||
|
|
||
| beforeAll(async () => { | ||
| await factory.create(uniqueName)() | ||
| adapter = adapters[uniqueName] | ||
| baseConnection = await adapter.connect(readModelName) | ||
| flushWorkers = async () => | ||
| await adapter.subscribe( | ||
| baseConnection, | ||
| readModelName, | ||
| subscriptionOptions.eventTypes, | ||
| subscriptionOptions.aggregateIds, | ||
| async () => null | ||
| ) | ||
| const baseSubscribe = flushWorkers | ||
| await baseSubscribe() | ||
| buildOnConnection = async ( | ||
| connection: typeof baseConnection, | ||
| parameters: any | ||
| ) => { | ||
| if (!performWorkers) { | ||
| return | ||
| } | ||
| let buildPromise | ||
| try { | ||
| buildPromise = adapter.build( | ||
| connection, | ||
| readModelName, | ||
| connection, | ||
| { | ||
| acquireInitHandler: async () => delayFunction.bind(null, 100), | ||
| acquireEventHandler: async () => delayFunction.bind(null, 5000), | ||
| acquireResolver: async () => delayFunction.bind(null, 100), | ||
| connectorName: 'default', | ||
| name: readModelName, | ||
| }, | ||
| (timeout: number, notificationExtraPayload: object) => { | ||
| void (async () => { | ||
| if (!connectionsDelays.has(connection)) { | ||
| connectionsDelays.set(connection, []) | ||
| } | ||
| connectionsDelays.get(connection).push(getDelay(timeout)) | ||
| await buildPromise | ||
| await delayFunction(timeout) | ||
| await buildOnConnection( | ||
| connection, | ||
| getNotificationObj(true, notificationExtraPayload) | ||
| ) | ||
| })() | ||
| return Promise.resolve(null) | ||
| }, | ||
| { | ||
| loadEvents: async ({ cursor }) => ({ | ||
| events: cursor === 'true' ? [{ type: eventType }] : [], | ||
| }), | ||
| getNextCursor: (cursor) => (cursor == null ? 'true' : 'false'), | ||
| establishTimeLimit: delayFunction, | ||
| }, | ||
| getDelay.bind(null, 60000), | ||
| parameters | ||
| ) | ||
| currentBuilders.add(buildPromise) | ||
| await buildPromise | ||
| } finally { | ||
| if (buildPromise != null) { | ||
| currentBuilders.delete(buildPromise) | ||
| } | ||
| } | ||
| } | ||
| }) | ||
|
|
||
| afterAll(async () => { | ||
| await Promise.all( | ||
| Array.from(currentConnections).map(async (connection) => { | ||
| try { | ||
| await adapter.disconnect(connection, readModelName) | ||
| } catch (e) {} | ||
| }) | ||
| ) | ||
| currentConnections.clear() | ||
|
|
||
| await adapter.unsubscribe(baseConnection, readModelName, async () => null) | ||
| await adapter.disconnect(baseConnection, readModelName) | ||
|
|
||
| await factory.destroy(uniqueName)() | ||
| }) | ||
|
|
||
| test('should perform with correct jitter', async () => { | ||
| while (currentConnections.size < 3) { | ||
| currentConnections.add(await adapter.connect(readModelName)) | ||
| } | ||
| for (const connection of currentConnections) { | ||
| void buildOnConnection(connection, getNotificationObj(false)) | ||
| } | ||
|
|
||
| const stopThrottlingTimestamp = Date.now() + 10000 | ||
| while (Date.now() < stopThrottlingTimestamp) { | ||
| await flushWorkers() | ||
| await delayFunction(100) | ||
| } | ||
|
|
||
| while (currentBuilders.size > 0) { | ||
| await delayFunction(500) | ||
| } | ||
| performWorkers = false | ||
|
|
||
| for (const connection of currentConnections) { | ||
| const delays = connectionsDelays.get(connection) ?? [] | ||
| const delaysBase2Degrees = delays | ||
| .filter((delay) => delay > 0) | ||
| .map((delay) => Math.log2(delay / 100)) | ||
|
|
||
| for (let index = 0; index < delaysBase2Degrees.length; index++) { | ||
| expect(Math.floor(delaysBase2Degrees[index])).toEqual( | ||
| delaysBase2Degrees[index] | ||
| ) | ||
| expect( | ||
| delaysBase2Degrees[index] === 0 || | ||
| (index > 0 | ||
| ? delaysBase2Degrees[index - 1] + 1 === delaysBase2Degrees[index] | ||
| : false) | ||
| ).toEqual(true) | ||
| } | ||
| await adapter.disconnect(connection, readModelName) | ||
| } | ||
| currentConnections.clear() | ||
| }) | ||
| }) |
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