InMemoryCacheProvider added

Author: maneesht

packages/data-connect/src/cache/InMemoryCacheProvider.ts

@@ -0,0 +1,37 @@
+import { InternalCacheProvider } from './CacheProvider';
+import { EntityDataObject } from './EntityDataObject';
+import { ResultTree } from './ResultTree';
+
+
+export class InMemoryCacheProvider implements InternalCacheProvider {
+  private bdos = new Map<string, EntityDataObject>();
+  private resultTrees = new Map<string, ResultTree>();
+  constructor(private _keyId: string) { }
+
+  setResultTree(queryId: string, rt: ResultTree): Promise<void> {
+    this.resultTrees.set(queryId, rt);
+    return Promise.resolve();
+  }
+  // TODO: Should this be in the cache provider? This seems common along all CacheProviders.
+  async getResultTree(queryId: string): Promise<ResultTree | undefined> {
+    return this.resultTrees.get(queryId);
+  }
+  createGlobalId(): string {
+    return crypto.randomUUID();
+  }
+  updateBackingData(backingData: EntityDataObject): Promise<void> {
+    this.bdos.set(backingData.globalID, backingData);
+    return Promise.resolve();
+  }
+  async getBdo(globalId: string): Promise<EntityDataObject> {
+    if (!this.bdos.has(globalId)) {
+      this.bdos.set(globalId, new EntityDataObject(globalId));
+    }
+    // Because of the above, we can guarantee that there will be a BDO at the globalId.
+    return this.bdos.get(globalId)!;
+  }
+  close(): Promise<void> {
+    // TODO: Noop
+    return Promise.resolve();
+  }
+}