在数据存储区中创建/更新触发云功能 [英] Create/update in datastore triggers Cloud function

问题描述

我在Google数据存储区中有一个数据库.我不知道如何使用云功能，但是我想在创建或更新后触发事件. 不幸的是，文档只是针对以下主题: https://cloud.google .com/appengine/docs/standard/java/datastore/callbacks

I have a database in Google Datastore. I don't know how to use cloud functions, but i want to trigger an event after a creation or an update. Unfortunately the documentation is light on the subject : https://cloud.google.com/appengine/docs/standard/java/datastore/callbacks

我不知道在创建或更新行后如何使用@PostPut触发事件.

I don't know how i could use @PostPut to trigger an event as soon as a line is created or updated.

有人有一个基本示例教程吗?

Does anyone have a tutorial which a basic example ?

谢谢

推荐答案

Dan MacGrath提供了当前可用的触发器:

Dan MacGrath provided an answer to a similar request (callbacks are indeed discussed below. Such solution doesn't exist yet. As a workaround, taking into account the current available triggers:

1. HTTP-直接通过HTTP请求调用功能.
2. 云存储
3. 云发布/订阅
4. Firebase(数据库，存储，分析，身份验证)
5. Stackdriver Logging-通过创建接收器将日志条目转发到Pub/Sub主题.然后，您可以触发该功能.

我会建议一些解决方案:

I would suggest a couple of solutions:

1. 每次创建或更新行以触发链接的Cloud Function时，都将某些内容保存在Cloud Storage的特定存储桶中.之后您可以删除存储桶中的内容.
2. 创建具有相同名称的日志，然后将其转发到Pub/Sub ，通过创建一个接收器.

1. Saving something in a specific bucket from Cloud Storage every time that a line is created or updated to trigger a linked Cloud Function. You can delete the bucket contents afterwards.
2. Create logs with the same name and then forward them to Pub/Sub, by creating a sink.

编辑1

• 云功能的云存储触发器: Google官方文档和在node.js 6中包含示例代码的教程" rel ="nofollow noreferrer"> Github .
• 用于Cloud Functions的Cloud Pub/Sub触发器: Google官方文档并在 Github (与以前相同).

• Cloud Storage triggers for Cloud Functions: Official Google doc and tutorial with a sample code in node.js 6 in Github.
• Cloud Pub/Sub triggers for Cloud Functions: Official Google doc and tutorial with a sample code in node.js 6 in Github (the same than before).

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