AwsSdkBackoffSimulation.java

package sample;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonWebServiceRequest;
import com.amazonaws.ClientConfiguration;
import com.amazonaws.retry.PredefinedRetryPolicies;
import com.amazonaws.retry.RetryPolicy;
import com.amazonaws.services.dynamodbv2.model.InternalServerErrorException;
import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughputExceededException;

public class AwsSdkBackoffSimulation {

    public static void main(String[] args) {

        RetryPolicy.BackoffStrategy backoffStrategy1 = new ClientConfiguration()
                .getRetryPolicy()
                .getBackoffStrategy();
        RetryPolicy.BackoffStrategy backoffStrategy2 = new ClientConfiguration()
                .withRetryPolicy(PredefinedRetryPolicies.DYNAMODB_DEFAULT)
                .getRetryPolicy()
                .getBackoffStrategy();

        AmazonClientException error = new InternalServerErrorException("error");

        ProvisionedThroughputExceededException throttleError = new ProvisionedThroughputExceededException("error");
        throttleError.setErrorCode("ThrottlingException");

        for (int i = 0; i < 10; i++) {
            System.out.println(String.format("%03d, DEFAULT: %6d, DYNAMODB_DEFAULT: %6d, DEFAULT(throttleError): %6d, DYNAMODB_DEFAULT(throttleError): %6d",
                    i,
                    backoffStrategy1.delayBeforeNextRetry(AmazonWebServiceRequest.NOOP, error, i),
                    backoffStrategy2.delayBeforeNextRetry(AmazonWebServiceRequest.NOOP, error, i),
                    backoffStrategy1.delayBeforeNextRetry(AmazonWebServiceRequest.NOOP, throttleError, i),
                    backoffStrategy2.delayBeforeNextRetry(AmazonWebServiceRequest.NOOP, throttleError, i)));
        }
    }
}

サンプル実行結果

000, DEFAULT:     56, DYNAMODB_DEFAULT:      5, DEFAULT(throttleError):    472, DYNAMODB_DEFAULT(throttleError):    420
001, DEFAULT:    152, DYNAMODB_DEFAULT:      3, DEFAULT(throttleError):    710, DYNAMODB_DEFAULT(throttleError):    657
002, DEFAULT:    345, DYNAMODB_DEFAULT:     27, DEFAULT(throttleError):   1748, DYNAMODB_DEFAULT(throttleError):   1553
003, DEFAULT:      6, DYNAMODB_DEFAULT:    104, DEFAULT(throttleError):   2544, DYNAMODB_DEFAULT(throttleError):   3162
004, DEFAULT:    813, DYNAMODB_DEFAULT:     28, DEFAULT(throttleError):   7258, DYNAMODB_DEFAULT(throttleError):   4162
005, DEFAULT:   1279, DYNAMODB_DEFAULT:    798, DEFAULT(throttleError):  13568, DYNAMODB_DEFAULT(throttleError):  10524
006, DEFAULT:   1308, DYNAMODB_DEFAULT:    565, DEFAULT(throttleError):  12845, DYNAMODB_DEFAULT(throttleError):  16461
007, DEFAULT:   3089, DYNAMODB_DEFAULT:   2425, DEFAULT(throttleError):  17140, DYNAMODB_DEFAULT(throttleError):  12536
008, DEFAULT:   1517, DYNAMODB_DEFAULT:   4147, DEFAULT(throttleError):  17606, DYNAMODB_DEFAULT(throttleError):  13507
009, DEFAULT:  17415, DYNAMODB_DEFAULT:   3009, DEFAULT(throttleError):  10704, DYNAMODB_DEFAULT(throttleError):  13932