| 1 | import * as Effect from "effect/Effect"; |
| 2 | import * as Layer from "effect/Layer"; |
| 3 | import * as Binding from "../../Binding.ts"; |
| 4 | import * as Output from "../../Output.ts"; |
| 5 | import { isBindingHost } from "../Lambda/Function.ts"; |
| 6 | import { Connect, connectEnvPrefix } from "./Connect.ts"; |
| 7 | import type { ServerlessCache } from "./ServerlessCache.ts"; |
| 8 | |
| 9 | /** |
| 10 | * Environment-only implementation of {@link Connect}. At deploy time it |
| 11 | * publishes the cache endpoint as `ELASTICACHE_{LOGICAL_ID}_{HOST,PORT,TLS}` |
| 12 | * environment variables on the host Function; at runtime it resolves the |
| 13 | * same values into a typed connection descriptor. No IAM policy is attached |
| 14 | * — the classic valkey/redis/memcached data plane is governed by VPC |
| 15 | * security groups, not IAM. |
| 16 | */ |
| 17 | export const ConnectHttp = Layer.effect( |
| 18 | Connect, |
| 19 | Effect.gen(function* () { |
| 20 | return Effect.fn(function* (cache: ServerlessCache) { |
| 21 | const Host = yield* cache.endpointAddress; |
| 22 | const Port = yield* cache.endpointPort; |
| 23 | const ReaderHost = yield* cache.readerEndpointAddress; |
| 24 | const ReaderPort = yield* cache.readerEndpointPort; |
| 25 | |
| 26 | if (!globalThis.__ALCHEMY_RUNTIME__) { |
| 27 | const host = yield* Binding.Host; |
| 28 | if (isBindingHost(host)) { |
| 29 | const prefix = connectEnvPrefix(cache.LogicalId); |
| 30 | yield* host.bind`Allow(${host}, AWS.ElastiCache.Connect(${cache}))`({ |
| 31 | env: { |
| 32 | [`${prefix}_HOST`]: cache.endpointAddress, |
| 33 | // Lambda environment variables are strings — stringify the port. |
| 34 | [`${prefix}_PORT`]: Output.interpolate`${cache.endpointPort}`, |
| 35 | // Serverless caches are TLS-only. |
| 36 | [`${prefix}_TLS`]: "true", |
| 37 | }, |
| 38 | }); |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | return Effect.gen(function* () { |
| 43 | const host = yield* Host; |
| 44 | const port = yield* Port; |
| 45 | const readerHost = yield* ReaderHost; |
| 46 | const readerPort = yield* ReaderPort; |
| 47 | if (!host || port === undefined) { |
| 48 | return yield* Effect.die( |
| 49 | `ElastiCache endpoint for '${cache.LogicalId}' is not available yet`, |
| 50 | ); |
| 51 | } |
| 52 | return { |
| 53 | host, |
| 54 | port, |
| 55 | readerHost, |
| 56 | readerPort, |
| 57 | tls: true, |
| 58 | }; |
| 59 | }); |
| 60 | }); |
| 61 | }), |
| 62 | ); |