November 2021
Beginner to intermediate
239 pages
4h 15m
Chinese
Content preview from Dapr学习手册
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状态
｜
97
你可能已经注意到，
Dapr
并没有定义插入
(insert)
操作。这是因为在分布式
系统中，每个插入操作都应该是
upsert
操作，根据给定的键是否存在来执行
事务性的插入（
insert
）或更新（
update
）。
可以通过
BulkSet
方法执行
bulk set
操作。如前所述，批量操作并不是作为
一个隔离的事务来处理，这意味着它可能会部分成功。不过可以给批量操作
附加重试策略。
要通过
Dapr
发送
Set
请求，请将
key/value
对的
JSON
数组
POST
到
http://
localhost:<Dapr port>/v1.0/state/<state store name>
。
2.3.4 Delete
请求
Delete
请求和批量
delete
请求与
set
请求类似，除了
concurrency
选项，在这
种情况下，并发选项并不相关。
要通过
Dapr
发送
Delete
请求，请发送
DELETE
请求到
http://localhost:<Dapr
port>/v1.0/state/<state store name>/<key>
。请求头可选地包含一个已知
ETag
的
If-Match
头。
2.3.5
事务性请求
可以向事务性状态存储提交事务性请求。该请求是
upsert
操作或
delete
操作
的列表。事务性请求中的所有操作作为一个整体成功或失败：要么执行了所
有操作，要么没有执行任何操作。在本文撰写时，不能为事务性请求附加重
试策略。
2.4
使用
Dapr State API
使用
Dapr
状态
API ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.