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@smithy/util-retry
Advanced tools
Readme
This package provides shared utilities for retries.
By default, each client already has a default retry strategy. The default retry count is 3, and only retryable errors will be retried.
AWS Documentation: Retry behavior.
import { S3Client } from "@aws-sdk/client-s3";
const client = new S3Client({}); // default retry strategy included.
If you want to change the number of attempts, you can provide maxAttempts
configuration during client creation.
import { S3Client } from "@aws-sdk/client-s3";
const client = new S3Client({ maxAttempts: 4 });
This is recommended because the StandardRetryStrategy
includes backoff calculation,
deciding whether an error should be retried, and a retry token counter.
If you want to change the number of attempts and use a custom delay
computation, you can use the ConfiguredRetryStrategy
from @smithy/util-retry
.
import { S3Client } from "@aws-sdk/client-s3";
import { ConfiguredRetryStrategy } from "@smithy/util-retry";
const client = new S3Client({
retryStrategy: new ConfiguredRetryStrategy(
4, // max attempts.
(attempt: number) => 100 + attempt * 1000 // backoff function.
),
});
This example sets the backoff at 100ms plus 1s per attempt.
If you provide both maxAttempts
and retryStrategy
, the retryStrategy
will
get precedence as it's more specific.
import { S3Client } from "@aws-sdk/client-s3";
import { ConfiguredRetryStrategy } from "@smithy/util-retry";
const client = new S3Client({
maxAttempts: 2, // ignored.
retryStrategy: new ConfiguredRetryStrategy(
4, // used.
(attempt: number) => 100 + attempt * 1000 // backoff function.
),
});
You can implement the RetryStrategyV2
interface.
Source: https://github.com/awslabs/smithy-typescript/blob/main/packages/types/src/retry.ts API Docs: https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/Package/-smithy-types/Interface/RetryStrategyV2/
FAQs
Shared retry utilities to be used in middleware packages.
We found that @smithy/util-retry demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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