外部化配置Akka [英] Externalize configuration Akka

问题描述

我是Akka的新手，我遇到了以下问题。

I am new in Akka and I faced the problem below.

我想外部化我的应用程序中的配置。更具体地说，我有一些随每个环境而不同的变量。因此，我认为我可以为每个环境设置特定的环境变量（秘密等）。
但是我可以对每个环境使用不同的一些变量（非秘密）怎么办？

I want to externalize the configuration in my App. More specifically, I have some variables that are different per each environment. So I think that I can have specific environment variables (secrets, etc) for each environment. But what I can do with some variables (non-secrets) which are different per each environment?

dev.properties ， application.conf ， deploy.json 文件？
从这些文件中加载变量的正确方法是什么？

What is the difference between, dev.properties, application.conf, deploy.json files? What is the proper way to load variables from those files?

推荐答案

有几种选择：

• 环境变量并支持替换（也支持在文件中具有默认值，并且仅在设置了环境变量的情况下使用）。 - https://github.com/lightbend/config#optional -system-or-env-variable-overrides


• 系统属性，如果在启动JVM时设置了系统属性，并且该系统属性与config中的路径匹配文件，它会覆盖设置


• 您可以使用系统属性-application.conf 文件https://github.com/lightbend/config#standard-behavior rel = nofollow noreferrer> https://github.com/lightbend/config#standard-behavior

• Environment variables and using the support for substitution (there is also support for having default in the file and only use the environment vars if they are set). - https://github.com/lightbend/config#optional-system-or-env-variable-overrides
• System properties, if you set a system property when you start the JVM, and that system property matches a path in the config file, it overrides the setting
• You can point to an alternative application.conf file using a system property - https://github.com/lightbend/config#standard-behavior

如果这还不够的话，您还可以通过编程方式创建 Config 实例来选择逻辑，从而完全自定义逻辑，然后在创建时将其传递到 ActorSystem 。

If that is not enough you could also do completely custom logic around selecting logic by programmatically creating a Config instance and passing that to the ActorSystem when you create it.

dev.properties 和 deploy.json 是AFAIK与Akka无关，除非有特殊说明

The dev.properties and deploy.json is AFAIK not related to Akka, unless something specifically done in your application.

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