JavaScript: Updates timer util to integrate a backoff for long running retries. (#7116)

Author: beqqrry-aws

javascriptv3/example_code/cross-services/wkflw-pools-triggers/tests/scenario-auto-confirm.integration.test.js

@@ -34,15 +34,18 @@ describe("Scenario - AutoConfirm", () => {
  Capabilities: [Capability.CAPABILITY_NAMED_IAM],
  }),
  );
- await retry({ intervalInMs: 2000, maxRetries: 60 }, async () => {
- const { Stacks } = await cloudformationClient.send(
- new DescribeStacksCommand({ StackName: stackName }),
- );
- const stack = Stacks[0];
- if (stack.StackStatus !== "CREATE_COMPLETE") {
- throw new Error("Stack creation incomplete.");
- }
- });
+ await retry(
+ { intervalInMs: 2000, maxRetries: 60, backoff: 1000 },
+ async () => {
+ const { Stacks } = await cloudformationClient.send(
+ new DescribeStacksCommand({ StackName: stackName }),
+ );
+ const stack = Stacks[0];
+ if (stack.StackStatus !== "CREATE_COMPLETE") {
+ throw new Error("Stack creation incomplete.");
+ }
+ },
+ );
  });
 
  afterAll(async () => {

javascriptv3/example_code/libs/utils/util-timers.js

@@ -10,13 +10,13 @@ const wait = (seconds) =>
 
 /**
  * @template T
- * @param {{ intervalInMs: number, maxRetries: number, swallowError?: boolean, quiet?: boolean }} config
+ * @param {{ intervalInMs: number, maxRetries: number, backoff?: number, swallowError?: boolean, quiet?: boolean }} config
  * @param {() => Promise<T>} fn
  * @returns {Promise<T>}
  */
 const retry = (config, fn) =>
  new Promise((resolve, reject) => {
- const { intervalInMs = 500, maxRetries = 10 } = config;
+ const { intervalInMs = 500, maxRetries = 10, backoff = 0 } = config;
  fn()
  .then(resolve)
  .catch((err) => {
@@ -32,10 +32,14 @@ const retry = (config, fn) =>
  config.swallowError ? resolve() : reject(err);
  } else {
  setTimeout(() => {
- retry({ ...config, maxRetries: maxRetries - 1 }, fn).then(
- resolve,
- reject,
- );
+ retry(
+ {
+ ...config,
+ intervalInMs: intervalInMs + backoff,
+ maxRetries: maxRetries - 1,
+ },
+ fn,
+ ).then(resolve, reject);
  }, intervalInMs);
  }
  });