Package software.amazon.awssdk.core.retry

Enum RetryMode

    • Enum Constant Detail

      • LEGACY

        public static final RetryMode LEGACY
        The LEGACY retry mode, specific to the Java SDK, and characterized by:
        1. Up to 3 retries, or more for services like DynamoDB (which has up to 8).
        2. Zero token are subtracted from the TokenBucketRetryCondition when throttling exceptions are encountered.

        This is the retry mode that is used when no other mode is configured.

      • STANDARD

        public static final RetryMode STANDARD
        The STANDARD retry mode, shared by all AWS SDK implementations, and characterized by:
        1. Up to 2 retries, regardless of service.
        2. Throttling exceptions are treated the same as other exceptions for the purposes of the TokenBucketRetryCondition.

      • ADAPTIVE

        @Deprecated
public static final RetryMode ADAPTIVE
        Deprecated.
        As of 2.25.xx, replaced by ADAPTIVE_V2. The ADAPTIVE implementation has a bug that prevents it from remembering its state across requests which is needed to correctly estimate its sending rate. Given that this bug has been present since its introduction and that correct version might change the traffic patterns of the SDK we deemed too risky to fix this implementation.
        Adaptive retry mode builds on STANDARD mode.

        Adaptive retry mode dynamically limits the rate of AWS requests to maximize success rate. This may be at the expense of request latency. Adaptive retry mode is not recommended when predictable latency is important.

        Warning: Adaptive retry mode assumes that the client is working against a single resource (e.g. one DynamoDB Table or one S3 Bucket). If you use a single client for multiple resources, throttling or outages associated with one resource will result in increased latency and failures when accessing all other resources via the same client. When using adaptive retry mode, we recommend using a single client per resource.

        See Also:
        RetryPolicy.isFastFailRateLimiting()

      • ADAPTIVE_V2

        public static final RetryMode ADAPTIVE_V2
        Adaptive V2 retry mode builds on STANDARD mode.

        Adaptive retry mode dynamically limits the rate of AWS requests to maximize success rate. This may be at the expense of request latency. Adaptive V2 retry mode is not recommended when predictable latency is important.

        ADAPTIVE_V2 mode differs from ADAPTIVE mode in the computed delays between calls, including the first attempt that might be delayed if the algorithm considers that it's needed to increase the odds of a successful response.

        Warning: Adaptive V2 retry mode assumes that the client is working against a single resource (e.g. one DynamoDB Table or one S3 Bucket). If you use a single client for multiple resources, throttling or outages associated with one resource will result in increased latency and failures when accessing all other resources via the same client. When using adaptive retry mode, we recommend using a single client per resource.

    • Method Detail

      • values

        public static RetryMode[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows: 
        for (RetryMode c : RetryMode.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static RetryMode valueOf​(String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        IllegalArgumentException - if this enum type has no constant with the specified name
        NullPointerException - if the argument is null

      • defaultRetryMode

        public static RetryMode defaultRetryMode()
        Retrieve the default retry mode by consulting the locations described in RetryMode, or LEGACY if no value is configured.