hlteoh37 commented on code in PR #1: URL: https://github.com/apache/flink-connector-dynamodb/pull/1#discussion_r998664686
########## flink-connector-dynamodb/src/main/java/org/apache/flink/streaming/connectors/dynamodb/config/AWSDynamoDbConfigConstants.java: ########## @@ -0,0 +1,108 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.streaming.connectors.dynamodb.config; + +import org.apache.flink.annotation.PublicEvolving; +import org.apache.flink.streaming.connectors.dynamodb.util.AWSDynamoDbUtil; + +import software.amazon.awssdk.core.retry.backoff.EqualJitterBackoffStrategy; +import software.amazon.awssdk.core.retry.backoff.FixedDelayBackoffStrategy; +import software.amazon.awssdk.core.retry.backoff.FullJitterBackoffStrategy; + +/** Defaults for {@link AWSDynamoDbUtil}. */ +@PublicEvolving +public class AWSDynamoDbConfigConstants { + + public static final String BASE_DYNAMODB_USER_AGENT_PREFIX_FORMAT = + "Apache Flink %s (%s) DynamoDB Connector"; + + /** Identifier for user agent prefix. */ + public static final String DYNAMODB_CLIENT_USER_AGENT_PREFIX = + "aws.dynamodb.client.user-agent-prefix"; + + public static final String AWS_DYNAMODB_CLIENT_RETRY_PREFIX = "aws.dynamodb.client.retry"; + + /** + * Possible configuration values for backoff strategy on retry when writing to DynamoDB. + * Internally, a corresponding implementation of {@link + * software.amazon.awssdk.core.retry.backoff.BackoffStrategy} will be used. + */ + @PublicEvolving + public enum BackoffStrategy { + + /** + * Backoff strategy that uses a full jitter strategy for computing the next backoff delay. A + * full jitter strategy will always compute a new random delay between and the computed + * exponential backoff for each subsequent request. See example: {@link + * FullJitterBackoffStrategy} + */ + FULL_JITTER, + + /** + * Backoff strategy that uses equal jitter for computing the delay before the next retry. An + * equal jitter backoff strategy will first compute an exponential delay based on the + * current number of retries, base delay and max delay. The final computed delay before the + * next retry will keep half of this computed delay plus a random delay computed as a random + * number between 0 and half of the exponential delay plus one. See example: {@link + * EqualJitterBackoffStrategy} + */ + EQUAL_JITTER, + + /** + * Simple backoff strategy that always uses a fixed delay for the delay * before the next + * retry attempt. See example: {@link FixedDelayBackoffStrategy} + */ + FIXED_DELAY + } Review Comment: Created a JIRA for it https://issues.apache.org/jira/browse/FLINK-29683 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
