akka java程序覆盖配置 [英] akka java programmatic override configuration

问题描述

我能找到的关于Scala的几个主题是针对Scala而不是Java，并且没有一个针对远程actor。

The few topics I can find about this are for Scala, rather than Java, and none address remote actors.

我有一个基本配置文件（SERVER_CONFIG_FILE）：

I have a base configuration file (SERVER_CONFIG_FILE):

Include "akka-common"

TheSystem {
  akka {
    actor {
      provider = "akka.remote.RemoteActorRefProvider"
        deployment { 
          /OtherSupervisor {
            remote = "akka://OtherSystem@127.0.0.1:8553"
          }
        }
      }
    remote {
      transport = "akka.remote.netty.NettyRemoteTransport"
      netty {
        hostname = "127.0.0.1"
        port = 8552
      }
    }
  }
}

我想在我的程序中加载它，然后覆盖几个设置，但我无法弄清楚代码。类似于：

I want to load it in my program, and then override several settings, but I can't figure out the code. Something like:

private final Config serverConfig = ConfigFactory.load(SERVER_CONFIG_FILE).withValue...?

我需要覆盖akka：//DroneSystem@127.0.0.1：8553的值，还有主机名。我认为主机名可以通过ComparisonSystem.akka.remote.netty.hostname来解决，但确认会有所帮助。

I need to override the value of "akka://DroneSystem@127.0.0.1:8553", and also the hostname. I think the hostname can be addressed by "ComparisonSystem.akka.remote.netty.hostname", but confirmation would help.

我真的不知道如何解决第一个问题。值，也没有java调用它来使它结合在一起。我可以从一个我能看到的例子中学习，但不是从我找到的Scala中学习，并且没有任何地址在路径中有该Actor名称。

I really do not know how to address the first value, nor what java calls to use to make it come together. I can learn from an example I can see, but not from the Scala I find, and nothing addresses having that Actor Name in the path.

提前致谢。

推荐答案

您可以这样做，请注意您使用 Config 实例使用覆盖并让它回退到您的默认配置而不是相反：

You can do that like this, note that you use the Config instance with overrides and let it fallback to your default configuration rather than the other way around:

Config overrides = ConfigFactory.parseString("some.setting=a-value");
Config actualConfig = overrides.withFallback(ConfigFactory.load());

或者如果您不喜欢构建字符串，可以使用属性来指定覆盖：

Or if you do not like building strings you could use properties to specify your overrides:

Properties properties = new Properties();
properties.setProperty("some.setting", "a-value");
Config overrides = ConfigFactory.parseProperties(properties);
Config actualConfig = overrides.withFallback(ConfigFactory.load());

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