com.amazon.pay.api

Class ExponentialRetryStrategy

java.lang.Object

com.amazon.pay.api.ExponentialRetryStrategy

All Implemented Interfaces:

RetryStrategy

Direct Known Subclasses:

DefaultRetryStrategy

public class ExponentialRetryStrategy
extends Object
implements RetryStrategy

Implement an Exponential Backoff Retry Strategy

Field Summary

Fields

Modifier and Type	Field and Description
protected long	initialDelayMillis The delay to apply to the initial retry.
protected long	initialThrottlingDelayMillis The delay to apply to the initial retry if the last attempt was throttled.
protected long	maxDelayMillis The maximum delay to apply to a non-throttled retry
protected int	maxRetries The maximum number of retry attempts.
protected long	maxThrottlingDelayMillis The maximum delay to apply when retrying a throttled request.

Constructor Summary

Constructors

Constructor and Description
ExponentialRetryStrategy(int maxRetries, long initialDelayMillis) Instantiate Exponential backoff retry strategy with the same delay for throttled and non-throttled retries and no maximum delay for throttled or non-throttled retries.
ExponentialRetryStrategy(int maxRetries, long initialDelayMillis, long initialThrottlingDelayMillis) Instantiate Exponential backoff retry strategy with no maximum delay for throttled or non-throttled retries.
ExponentialRetryStrategy(int maxRetries, long initialDelayMillis, long initialThrottlingDelayMillis, long maxDelayMillis, long maxThrottlingDelayMillis) Instantiate Exponential backoff retry strategy

Method Summary

Modifier and Type	Method and Description
int	getMaxRetries() Get the maximum retry attempts
long	getWaitTime(int retryCount, int statusCode) Return how long to wait until the next request
boolean	isThrottledResponse(int statusCode) Determine if a response indicates a throttled request
void	setMaxRetries(int maxRetries) Set the maximum retry attempts.

Methods inherited from class java.lang.Object

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

Field Detail

initialDelayMillis

protected final long initialDelayMillis

The delay to apply to the initial retry. Affects the delay of all subsequent retries.

initialThrottlingDelayMillis

protected final long initialThrottlingDelayMillis

The delay to apply to the initial retry if the last attempt was throttled. Affects the delay of all subsequent throttling retries.

maxDelayMillis

protected final long maxDelayMillis

The maximum delay to apply to a non-throttled retry

maxThrottlingDelayMillis

protected final long maxThrottlingDelayMillis

The maximum delay to apply when retrying a throttled request.

maxRetries

protected int maxRetries

The maximum number of retry attempts.

Constructor Detail

ExponentialRetryStrategy

public ExponentialRetryStrategy(int maxRetries,
                                long initialDelayMillis)

Instantiate Exponential backoff retry strategy with the same delay for throttled and non-throttled retries and no maximum delay for throttled or non-throttled retries.

Parameters:

maxRetries - The maximum number of retries

initialDelayMillis - The delay constant to apply to all retries

ExponentialRetryStrategy

public ExponentialRetryStrategy(int maxRetries,
                                long initialDelayMillis,
                                long initialThrottlingDelayMillis)

Instantiate Exponential backoff retry strategy with no maximum delay for throttled or non-throttled retries.

Parameters:

maxRetries - The maximum number of retries

initialDelayMillis - The delay constant to apply to non-throttled retries

initialThrottlingDelayMillis - The delay constant to apply to throttled retries

ExponentialRetryStrategy

public ExponentialRetryStrategy(int maxRetries,
                                long initialDelayMillis,
                                long initialThrottlingDelayMillis,
                                long maxDelayMillis,
                                long maxThrottlingDelayMillis)

Instantiate Exponential backoff retry strategy

Parameters:

maxRetries - The maximum number of retries

initialDelayMillis - The delay constant to apply to non-throttled retries

initialThrottlingDelayMillis - The delay constant to apply to throttled retries

maxDelayMillis - The maximum delay to apply to a non-throttled retry

maxThrottlingDelayMillis - The maximum delay to apply when retrying a throttled request.

Method Detail

getWaitTime

public long getWaitTime(int retryCount,
                        int statusCode)

Description copied from interface: RetryStrategy

Return how long to wait until the next request

Specified by:

getWaitTime in interface RetryStrategy

Parameters:

retryCount - The number of retries that have been attempted

statusCode - The status code returned by the last attempt

Returns:

Milliseconds to wait before the next attempt

setMaxRetries

public void setMaxRetries(int maxRetries)

Description copied from interface: RetryStrategy

Set the maximum retry attempts.

Specified by:

setMaxRetries in interface RetryStrategy

Parameters:

maxRetries - The number of times to retry a failed request

getMaxRetries

public int getMaxRetries()

Description copied from interface: RetryStrategy

Get the maximum retry attempts

Specified by:

getMaxRetries in interface RetryStrategy

Returns:

The number of times to retry a failed request.

isThrottledResponse

public boolean isThrottledResponse(int statusCode)

Determine if a response indicates a throttled request

Parameters:

statusCode - The status code returned by the last request

Returns:

True if the last request was throttled, otherwise false