如何在基于Java的DynamoDB应用中设置TTL [英] How to set TTL in Java based app for DynamoDB

问题描述

我需要设置时间以编程方式通过AWS Java SDK在DynamoDB中运行。可能吗？我知道TTL功能是最近引入的- http://docs.aws。 amazon.com/amazondynamodb/latest/developerguide/TTL.html

Hi I need to set time to live programmatically for a table in DynamoDB via AWS Java SDK. Is it possible? I know that TTL feature is introduced recently - http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html

更新：
没有特殊注释，但我们可以手动进行：

UPDATE: There is no special annotaion, but we can do it manually:

@DynamoDBAttribute
private long ttl;

并将其配置为AWS中的ttl- http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/time- to-live-ttl-how-to.html

and configure it as ttl in AWS - http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/time-to-live-ttl-how-to.html

long now = Instant.now().getEpochSecond(); // unix time
long ttl = 60 * 60 * 24; // 24 hours in sec
setTtl(ttl + now); // when object will be expired

推荐答案

AmazonDynamoDBClient.updateTimeToLive 在此处或直接链接此处

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