如何订阅DynamoDB中的更改 [英] How to subscribe to changes in DynamoDB

问题描述

我不知道如何订阅DynamoDB数据库中的更改。让我举一个例子：用户A向用户B发送一条消息（保存在数据库中），然后在用户B的应用程序中自动出现该消息。

I don't know how to subscribe to changes in DynamoDB database. Let me show an example: User A sends a message (which is saved in the database) to User B and in the User B's app the message automatically appears.

我知道最近发布的AWS AppSync可以做到这一点，但是我无法将其与Ionic（正在使用）集成。但是，自从AWS AppSync仅在2017年底/ 2018年初发布以来，就必须有其他选择。

I know this is possible with recently released AWS AppSync, but I couldn't integrate it with Ionic (which I am using). However, there must be an alternative since AWS AppSync was released only at the end of 2017/beginning of 2018.

我还在DynamoDB中看到过一种称为Streams的东西，但没有

I've also seen something called Streams in DynamoDB but not sure if that's what I need.

推荐答案

DynamoDB流专为捕获/预订表活动而设计。您可以使用通知逻辑设置Lambda函数来处理流并相应地发送通知。

DynamoDB Streams is designed specifically for capturing/subscribing to table activity. You can set up a Lambda Function with your notification logic to process the stream and send notifications accordingly.

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