add clearCache

Author: Will-ShaoHua

packages/core/src/codewhisperer/region/regionProfileManager.ts

@@ -373,6 +373,11 @@ export class RegionProfileManager {
         }
     }
 
+    // Should be called on connection changed in case users change to a differnet connection and use the wrong resultset.
+    async clearCache() {
+        await this.cache.clearCache()
+    }
+
     async createQClient(region: string, endpoint: string, conn: SsoConnection): Promise<CodeWhispererUserClient> {
         const token = (await conn.getToken()).accessToken
         const serviceOption: ServiceOptions = {

packages/core/src/codewhisperer/util/authUtil.ts

@@ -143,6 +143,8 @@ export class AuthUtil {
             if (!this.isConnected()) {
                 await this.regionProfileManager.invalidateProfile(this.regionProfileManager.activeRegionProfile?.arn)
             }
+
+            await this.regionProfileManager.clearCache()
         })
 
         this.regionProfileManager.onDidChangeRegionProfile(async () => {

packages/core/src/shared/utilities/resourceCache.ts

@@ -154,6 +154,11 @@ export abstract class CachedResource<V> {
         }
     }
 
+    async clearCache() {
+        const baseCache = this.readCacheOrDefault()
+        await this.updateResourceCache({ result: undefined, timestamp: 0, locked: false }, baseCache)
+    }
+
     private async updateResourceCache(resource: Partial<Resource<any>>, cache: GlobalStateSchema<any> | undefined) {
         const baseCache = cache ?? this.readCacheOrDefault()