如何管理并发 Http Triggered Azure Functions 上的数据？

Question

我的 Azure 函数中有以下代码：

string id = Guid.NewGuid().ToString();
myObject.id = id;

现在，如果我同时进行多个 http 调用，并发调用最终会具有相同的 ID，我希望它们具有不同的 ID。

我试过更改 host.json，但没有成功。无论如何，这是 host.json:

中的代码

{
  "version": "2.0",
  "extensions": {
    "http": {
      "maxConcurrentCalls": 1
    }
  }
}

Azure 函数版本：2 网络版本：5.0

我该如何解决这个问题？

Answer 1

摘自 Guid.NewGuid Method 文档。

This is a convenient static method that you can call to get a new Guid. The method creates a Version 4 Universally Unique Identifier (UUID) as described in RFC 4122, Sec. 4.4. The returned Guid is guaranteed to not equal Guid.Empty.

On Windows, this function wraps a call to the CoCreateGuid function. The generated GUID contains 122 bits of strong entropy.

On non-Windows platforms, starting with .NET 6, this function calls the OS's underlying cryptographically secure pseudo-random number generator (CSPRNG) to generate 122 bits of strong entropy. In previous versions of .NET, the entropy is not guaranteed to be generated by a CSPRNG.

引用的 RFC 指出：

The version 4 UUID is meant for generating UUIDs from truly-random or pseudo-random numbers.

The algorithm is as follows:

Set the two most significant bits (bits 6 and 7) of the clock_seq_hi_and_reserved to zero and one, respectively.

Set the four most significant bits (bits 12 through 15) of the time_hi_and_version field to the 4-bit version number from Section 4.1.3.

Set all the other bits to randomly (or pseudo-randomly) chosen values.

根据这些规范，让对同一个 Azure 函数的两次调用生成相同的 GUID 应该是不可能的。一些本地测试表明（在可测试的请求数量中）这是不可能的。

您可能在某处有一个静态属性或对象，这就是您使用相同 ID 的原因。

如何管理并发 Http Triggered Azure Functions 上的数据？

How to manage data on concurrent Http Triggered Azure Functions?

c#

azure-functions