您应该将应用程序属性放在钢筋erlang应用程序中？ [英] Where should you put application properties in a rebar erlang application?

问题描述

一个新手问题：我写了我的第一个基于螺纹钢的erlang应用程序。我想配置一些基本的功能，如服务器主机等。放置它们的最佳位置在哪里，我应该如何将它们加载到应用程序中？

A newbie question: I wrote my first rebar based erlang application. I want to configure some basic properites like server host etc. Where is the best place to put them and how should I load them into the app?

推荐答案

接下来的步骤是发布并在其中创建一个节点。节点在独立的Erlang VM中运行应用程序。使用钢筋创建发行版的好起点：

The next steps are to make a release and create a node in it. A node runs your application in a standalone Erlang VM. A good starting point for creating a release using rebar:

Erlang应用程序管理与钢筋

创建一个版本后。您的节点中所有应用程序的配置属性可以添加到

Once you have created a release. The configuration properties for all applications in your node can then be added to

{your-app}/{release}/files/sys.config

您可以按以下方式阅读个别属性：

You can read individual properties as follows:

Val = application:get_env(APP, KEY)

或者，您的应用程序的所有属性都可以读取为

Alternatively, all properties for your application can be read as

Config = application:get_all_env(APP)

在 sys.config 中，属性可以添加为 proplist变种。

In sys.config, properties can be added as a proplist.

示例：

    {myapp,
      [
       {port, 1234},
       {pool_size, 5}
      ]
    }

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