Move in memory cache to apollo-server-caching

docs/source/features/data-sources.md

@@ -65,7 +65,6 @@ To give resolvers access to data sources, you pass them as options to the `Apoll
 const server = new ApolloServer({
   typeDefs,
   resolvers,
-  cache: new InMemoryKeyValueCache({ maxSize: 1000000 }),
   dataSources: () => {
     return {
       moviesAPI: new MoviesAPI(),
@@ -133,7 +132,7 @@ class PersonalizationAPI extends RESTDataSource {
 
 ## Using Memcached/Redis as a cache storage backend
 
-By default, data sources use an in-memory LRU cache to store responses from REST calls. When running multiple server instances, you'll want to use a shared cache backend instead. That's why Apollo Server also includes support for using [Memcached](../../../packages/apollo-server-memcached) or [Redis](../../../packages/apollo-server-redis) as your backing store. You can specify which one to use by creating an instance and passing it into the Apollo Server constructor:
+By default, resource caching will use an in memory LRU cache. When running multiple server instances, you'll want to use a shared cache backend instead. That's why Apollo Server also includes support for using [Memcached](../../../packages/apollo-server-memcached) or [Redis](../../../packages/apollo-server-redis) as your backing store. You can specify which one to use by creating an instance and passing it into the Apollo Server constructor:
 
 ```js
 const { MemcachedCache } = require('apollo-server-memcached');

packages/apollo-datasource-rest/package.json

@@ -24,6 +24,7 @@
   },
   "dependencies": {
     "apollo-server-env": "^2.0.0-rc.0",
+    "apollo-server-caching": "^2.0.0-rc.0",
     "http-cache-semantics": "^4.0.0",
     "lru-cache": "^4.1.3"
   },

packages/apollo-datasource-rest/src/HTTPCache.ts

@@ -1,12 +1,9 @@
 import CachePolicy from 'http-cache-semantics';
 
-import { KeyValueCache } from './KeyValueCache';
-import { InMemoryKeyValueCache } from './InMemoryKeyValueCache';
+import { KeyValueCache, InMemoryLRUCache } from 'apollo-server-caching';
 
 export class HTTPCache {
-  constructor(
-    private keyValueCache: KeyValueCache = new InMemoryKeyValueCache(),
-  ) {}
+  constructor(private keyValueCache: KeyValueCache = new InMemoryLRUCache()) {}
 
   async fetch(input: RequestInfo, init?: RequestInit): Promise<Response> {
     const request = new Request(input, init);

packages/apollo-datasource-rest/src/KeyValueCache.ts

@@ -1,4 +0,0 @@
-export interface KeyValueCache {
-  get(key: string): Promise<string | undefined>;
-  set(key: string, value: string): Promise<void>;
-}

packages/apollo-datasource-rest/src/index.ts

@@ -2,5 +2,4 @@ import 'apollo-server-env';
 
 export { RESTDataSource } from './RESTDataSource';
 export { HTTPCache } from './HTTPCache';
-export { KeyValueCache } from './KeyValueCache';
-export { InMemoryKeyValueCache } from './InMemoryKeyValueCache';
+export { KeyValueCache, InMemoryLRUCache } from 'apollo-server-caching';

packages/apollo-server-caching/src/InMemoryLRUCache.ts

@@ -1,11 +1,11 @@
 import LRU from 'lru-cache';
 import { KeyValueCache } from './KeyValueCache';
 
-export class InMemoryKeyValueCache implements KeyValueCache {
+export class InMemoryLRUCache implements KeyValueCache {
   private store: LRU.Cache<string, string>;
 
   // FIXME: Define reasonable default max size of the cache
-  constructor(maxSize: number = Infinity) {
+  constructor({ maxSize = Infinity }: { maxSize?: number } = {}) {
     this.store = LRU({
       max: maxSize,
       length: item => item.length,

packages/apollo-server-caching/src/index.ts

@@ -1,2 +1,4 @@
 export { KeyValueCache } from './KeyValueCache';
 export { testKeyValueCache } from './tests';
+
+export { InMemoryLRUCache } from './InMemoryLRUCache';

packages/apollo-server-core/src/ApolloServer.ts

@@ -16,7 +16,7 @@ import {
 } from 'graphql';
 import { GraphQLExtension } from 'graphql-extensions';
 import { EngineReportingAgent } from 'apollo-engine-reporting';
-import { InMemoryKeyValueCache } from 'apollo-datasource-rest';
+import { InMemoryLRUCache } from 'apollo-datasource-rest';
 
 import {
   SubscriptionServer,
@@ -123,7 +123,7 @@ export class ApolloServerBase {
     }
 
     if (!requestOptions.cache) {
-      requestOptions.cache = new InMemoryKeyValueCache();
+      requestOptions.cache = new InMemoryLRUCache();
     }
 
     this.requestOptions = requestOptions as GraphQLOptions;