Update sample to not cause unserializable captures. (pulumi#561)

aws-ts-url-shortener-cache-http/cache.ts

@@ -9,6 +9,9 @@ export class Cache {
  private readonly redis: awsx.ecs.FargateService;
  private readonly endpoint: pulumi.Output<awsx.elasticloadbalancingv2.ListenerEndpoint>;
 
+ public get: (key: string) => Promise<string>;
+ public set: (key: string, value: string) => Promise<void>;
+
  constructor(name: string, memory: number = 128) {
  const pw = config.redisPassword;
  const listener = new awsx.elasticloadbalancingv2.NetworkListener(name, { port: 6379 });
@@ -26,38 +29,41 @@ export class Cache {
  });
 
  this.endpoint = listener.endpoint;
- }
 
- public get(key: string): Promise<string> {
- const ep = this.endpoint.get();
- console.log(`Getting key '${key}' on Redis@${ep.hostname}:${ep.port}`);
-
- const client = require("redis").createClient(ep.port, ep.hostname, { password: config.redisPassword });
- return new Promise<string>((resolve, reject) => {
- client.get(key, (err: any, v: any) => {
- if (err) {
- reject(err);
- } else {
- resolve(v);
- }
+ // Expose get/set as member fields that don't capture 'this'. That way we don't try to
+ // serialize pulumi resources unnecessarily into our lambdas.
+ this.get = key => {
+ const ep = listener.endpoint.get();
+ console.log(`Getting key '${key}' on Redis@${ep.hostname}:${ep.port}`);
+
+ const client = require("redis").createClient(ep.port, ep.hostname, { password: config.redisPassword });
+ return new Promise<string>((resolve, reject) => {
+ client.get(key, (err: any, v: any) => {
+ if (err) {
+ reject(err);
+ } else {
+ resolve(v);
+ }
+ });
  });
- });
- }
+ };
+
+ this.set = (key, value) => {
+ const ep = listener.endpoint.get();
+ console.log(`Setting key '${key}' to '${value}' on Redis@${ep.hostname}:${ep.port}`);
 
- public set(key: string, value: string): Promise<void> {
- const ep = this.endpoint.get();
- console.log(`Setting key '${key}' to '${value}' on Redis@${ep.hostname}:${ep.port}`);
-
- const client = require("redis").createClient(ep.port, ep.hostname, { password: config.redisPassword });
- return new Promise<void>((resolve, reject) => {
- client.set(key, value, (err: any, v: any) => {
- if (err) {
- reject(err);
- } else {
- console.log("Set succeed: " + JSON.stringify(v));
- resolve();
- }
+ const client = require("redis").createClient(ep.port, ep.hostname, { password: config.redisPassword });
+ return new Promise<void>((resolve, reject) => {
+ client.set(key, value, (err: any, v: any) => {
+ if (err) {
+ reject(err);
+ } else {
+ console.log("Set succeed: " + JSON.stringify(v));
+ resolve();
+ }
+ });
  });
- });
+ };
  }
 }
+