software.amazon.qldb

Class RetryPolicy

java.lang.Object

software.amazon.qldb.RetryPolicy

public final class RetryPolicy
extends Object

RetryPolicy used to retry the transactions.

Note: If no retry policy is specified when creating the QldbDriver then a Retry Policy created will be created with the default parameters.

The default parameters are:

• Retry attempts: 4
• BackoffStrategy: DefaultQldbTransactionBackoffStrategy

The builder can be customized with the maximum number of retry attempts and the backoff strategy, used to compute the delay before the next retry request. Example:

 RetryPolicy retryPolicy = RetryPolicy.builder().maxRetries(3).build()

 QldbDriver QldbDriver = QldbDriver.builder()
                 .sessionClientBuilder(mockBuilder)
                 .ledger(LEDGER)
                 .transactionRetryPolicy(retryPolicy)
                 .maxConcurrentTransactions(TXN_LIMIT)
                 .build();
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RetryPolicy.Builder

Method Summary

Modifier and Type	Method and Description
static RetryPolicy.Builder	builder() Creates a builder instance of the RetryPolicy.
static RetryPolicy	maxRetries(int maxRetries) Factory method to create a RetryPolicy with the maximum retry number that a transaction will be executed.
static RetryPolicy	none() Factory method to create a RetryPolicy that will not retry.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

none

public static RetryPolicy none()

Factory method to create a RetryPolicy that will not retry.

Returns:

A retry policy instance

maxRetries

public static RetryPolicy maxRetries(int maxRetries)

Factory method to create a RetryPolicy with the maximum retry number that a transaction will be executed.

Note: The DefaultQldbTransactionBackoffStrategy backoff strategy will be used when creating the RetryPolicy with this method.

Parameters:

maxRetries - Maximum number of times that the transaction will be retried.

Returns:

A retry policy instance

builder

public static RetryPolicy.Builder builder()

Creates a builder instance of the RetryPolicy.

Returns:

Builder with recommended defaults.