扭曲应用而无扭曲 [英] Twisted application without twistd

问题描述

我使用Twisted框架为自己编写了一个不错的应用程序。我使用以下命令启动它：

I've wrote a nice app for myself using the Twisted framework. I launch it using a command like:

twistd -y myapp.py --pidfile=/var/run/myapp.pid --logfile=/var/run/myapp.log

效果很好=）

要启动我的应用程序，我用这个命令编写了一个脚本，因为我很懒^^
但是由于我使用相同的扭曲选项启动了我的应用程序，所以我修改了脚本shell解决方案很丑陋，但是如何在我的应用程序内部执行同样的操作？我想通过做 ./ myapp 来启动我的应用程序，而无需使用shell。

To launch my app I wrote a script with this command because I'm lazy^^ But since I launch my app with the same twistd option, and I tink the script shell solution is ugly, how I can do the same but inside my app? I'd like to launch my app by just doing ./myapp and without a shell work around.

I曾尝试在扭曲的文档中以及通过阅读扭曲的源代码来搜索它，但由于它是我的第一个Python应用程序（很棒的语言btw！），我不理解它。

I've tried to search about it in twisted documentation and by reading twisted source but I don't understand it since it's my first app in Python (wonderful language btw!)

预先感谢您提供任何帮助。

Thanks in advance for anyhelp.

推荐答案

您需要导入 twistd 脚本作为来自Twisted的模块，并调用它。使用现有命令行的最简单解决方案是导入 sys 模块以替换 argv 命令行，如下所示： twistd 运行，然后运行它。

You need to import the twistd script as a module from Twisted and invoke it. The simplest solution for this, using your existing command-line, would be to import the sys module to replace the argv command line to look like how you want twistd to run, and then run it.

这是一个简单的示例脚本它将使用您现有的命令行并使用Python脚本而不是Shell脚本运行它：

Here's a simple example script that will take your existing command-line and run it with a Python script instead of a shell script:

#!/usr/bin/python
from twisted.scripts.twistd import run
from sys import argv
argv[1:] = [
    '-y', 'myapp.py',
    '--pidfile', '/var/run/myapp.pid',
    '--logfile', '/var/run/myapp.log'
]
run()

如果您想将其很好地捆绑成一个包而不是硬编码的路径，可以通过查看每个模块中Python设置的特殊 __ file __ 变量来确定 myapp.py 的路径。将其添加到示例中看起来像这样：

If you want to bundle this up nicely into a package rather than hard-coding paths, you can determine the path to myapp.py by looking at the special __file__ variable set by Python in each module. Adding this to the example looks like so:

#!/usr/bin/python
from twisted.scripts.twistd import run
from my.application import some_module
from os.path import join, dirname
from sys import argv
argv[1:] = [
    '-y', join(dirname(some_module.__file__), "myapp.py"),
    '--pidfile', '/var/run/myapp.pid',
    '--logfile', '/var/run/myapp.log'
]
run()

您显然可以做类似的事情来计算适当的pidfile和日志文件路径。

and you could obviously do similar things to compute appropriate pidfile and logfile paths.

更全面的解决方案是编写插件，用于扭曲。 Axiom对象数据库项目中的axiomatic命令行程序是一个经过测试的，有价值的示例，说明如何对 twistd 进行类似的命令行操作上面介绍了什么，但是对命令行选项进行了更全面的处理，提供了不同的非扭转运行实用程序功能，等等。

A more comprehensive solution is to write a plugin for twistd. The axiomatic command-line program from the Axiom object-database project serves as a tested, production-worthy example of how to do similar command-line manipulation of twistd to what is described above, but with more comprehensive handling of command-line options, different non-twistd-running utility functionality, and so on.

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