Allow other retry configs to influence DynamoDB extended retries (#3175)

Gemfile

@@ -5,6 +5,7 @@ source 'https://rubygems.org'
 gem 'rake', require: false
 # SDK feature dependencies
 gem 'aws-crt' if ENV['CRT']
+gem 'base64'
 gem 'http-2'
 gem 'jmespath'
 if defined?(JRUBY_VERSION)

build_tools/aws-sdk-code-generator/lib/aws-sdk-code-generator/views/rbs/client_class.rb

@@ -138,7 +138,7 @@ def build_keyword_arguments(plugins)
           grouped = buffer.group_by { |name, _| name }
           grouped.transform_values(&:count).find_all { |_, c| 1 < c }.each do |name,|
             case name
-            when :endpoint, :endpoint_provider, :retry_limit, :disable_s3_express_session_auth, :account_id, :account_id_endpoint_mode
+            when :endpoint, :endpoint_provider, :retry_backoff, :retry_limit, :retry_base_delay, :disable_s3_express_session_auth, :account_id, :account_id_endpoint_mode
               # ok
             else
               warn("Duplicate client option in #{@service_name}: `#{grouped[name].map { |g| g.values_at(0, 2) }}`", uplevel: 0)

gems/aws-sdk-dynamodb/CHANGELOG.md

@@ -1,6 +1,8 @@
 Unreleased Changes
 ------------------
 
+* Issue - Allow other retry configs to influence DynamoDB extended retries.
+
 1.134.0 (2025-01-15)
 ------------------
 

gems/aws-sdk-dynamodb/lib/aws-sdk-dynamodb/plugins/extended_retries.rb

@@ -4,25 +4,49 @@ module Aws
   module DynamoDB
     module Plugins
       class ExtendedRetries < Seahorse::Client::Plugin
+        DEFAULT_BACKOFF = lambda do |c|
+          return unless c.retries > 1
 
-        option(:retry_limit,
+          delay = 2**(c.retries - 1) * c.config.retry_base_delay
+          if (c.config.retry_max_delay || 0) > 0
+            delay = [delay, c.config.retry_max_delay].min
+          end
+          jitter = c.config.retry_jitter
+          jitter = Aws::Plugins::RetryErrors::JITTERS[jitter] if jitter.is_a?(Symbol)
+          delay = jitter.call(delay) if jitter
+          Kernel.sleep(delay)
+        end
+
+        option(
+          :retry_limit,
           default: 10,
-          required: false,
           doc_type: Integer,
           docstring: <<-DOCS)
 The maximum number of times to retry failed requests.  Only
 ~ 500 level server errors and certain ~ 400 level client errors
 are retried.  Generally, these are throttling errors, data
-checksum errors, networking errors, timeout errors and auth
-errors from expired credentials.
-          DOCS
+checksum errors, networking errors, timeout errors, auth errors,
+endpoint discovery, and errors from expired credentials.
+This option is only used in the `legacy` retry mode.
+        DOCS
 
-        option(:retry_backoff, default: lambda { |context|
-          if context.retries > 1
-            Kernel.sleep(50 * (2 ** (context.retries - 1)) / 1000.0)
-          end
-        })
+        option(
+          :retry_base_delay,
+          default: 0.05,
+          doc_type: Float,
+          docstring: <<-DOCS)
+The base delay in seconds used by the default backoff function. This option
+is only used in the `legacy` retry mode.
+        DOCS
 
+        option(
+          :retry_backoff,
+          default: DEFAULT_BACKOFF,
+          doc_type: Proc,
+          docstring: <<-DOCS)
+A proc or lambda used for backoff. Defaults to 2**retries * retry_base_delay.
+This option is only used in the `legacy` retry mode.
+        DOCS
       end
     end
   end