如何获取当前Service Fabric应用程序的名称？

Question

Is it possible to get the name of the Service Fabric application where my code is running?

For example, my ApplicationParameters file has this:

<Application xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Name="fabric:/mytestapp" xmlns="http://schemas.microsoft.com/2011/01/fabric">

I want to retrieve "mytestapp" and use it in my code, but I haven't found anything that would let me do that. Any ideas?

Answer 1

ApplicationName is present as a string (unfortunately not a URI) as a property on the CodePackageActivationContext.

// System.Fabric.CodePackageActivationContext
public string ApplicationName
{
    get;
    internal set;
}

CodePackageActivationContext is present on the ServiceContext that every service is passed in its constructor. Example from stateful services.

public StatefulService(StatefulServiceContext serviceContext)
    : this(serviceContext, new ReliableStateManager(serviceContext, null))
{
}

If your service is a guest or a container or something that doesn't use the ReliableServices API, then passing the name explicitly as a config setting is probably your best bet.

Answer 2

In my case, I tried communicating the above ApplicationName between projects (Stateful to Stateless in my case), but it was surprisingly painful, to the point it was impossible because there is inconsistency in the value due to the different VM's and nodes being constantly changing.

I also tried communicating between projects by setting a value on some (static) variables of an external project, that didn't work.

Lastly I also tried writing the application name to a text file, but this only worked temporarily, because each node keeps an async copy of the text file.

My solution was to make use of Environment.GetEnvironmentVariable("Fabric_ApplicationName") , which worked perfectly.

See here .

I hope this helps.