在DynamoDB中自动填充时间戳 [英] Auto populate timestamp in DynamoDB
问题描述
我来自Relational Database的背景,我们有一种方法来填充用于行创建和更新的时间戳。
我很难找到DynamoDB的类似功能。
I come from Relational Database background and we have a way to populate timestamp for row creation and update. I am having difficulty finding similar feature for DynamoDB.
我检查了DynamoDB,以检查它们是否支持为dynamoDB中的每个条目自动填充日期时间戳。我看到可以创建随机ID,但这不是我所需要的。
I checked DynamoDB to check if they support autopopulate the date timestamp for every entry in dynamoDB. I see it is possible to create random ID but that is not what I need.
我的用例是在向DynamoDB表添加任何条目时自动添加一个时间戳记条目。感谢任何指针。谢谢
My usecase is to add a timestamp entry automatically when I add any entry to DynamoDB Table. Appreciate any pointers. Thanks
推荐答案
使用注释的Java解决方案(数据建模包)
您可以使用 DynamoDBAutoGeneratedTimestamp
批注。
You can use the DynamoDBAutoGeneratedTimestamp
annotation.
@DynamoDBAutoGeneratedTimestamp(strategy=DynamoDBAutoGenerateStrategy.CREATE)
public Date getCreatedDate() { return createdDate; }
public void setCreatedDate(Date createdDate) { this.createdDate = createdDate; }
@DynamoDBAutoGeneratedTimestamp(strategy=DynamoDBAutoGenerateStrategy.ALWAYS)
public Date getLastUpdatedDate() { return lastUpdatedDate; }
public void setLastUpdatedDate(Date lastUpdatedDate) { this.lastUpdatedDate = lastUpdatedDate; }
DynamoDBAutoGeneratedTimestamp
这篇关于在DynamoDB中自动填充时间戳的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!