Azure Webjobs - Define QueueName trigger on app.config - azure-webjobs

Question

With the new release of Azure Webjobs 3.0.0 SDK it was announced the:
http://azure.microsoft.com/blog/2014/06/18/announcing-the-0-3-0-beta-preview-of-microsoft-azure-webjobs-sdk/
Improved function discovery
We added an ITypeLocator and INameResolver to enable customizing how the WebJobs SDK looks >for functions. This enables scenarios such as the following:
You can define functions where the QueueName is not explicit. You can read Queue names from a config source and specify this value at runtime.
Restrict function discovery to a particular class or assembly.
Dynamic functions at indexing time: you can define the function signature at runtime.
But there's no sample code on how to do it.
Does anyone know how to define the queue name at runtime (e.g. from app.config)?

Answer 1

If you take advantage of the new INameResolver in the configuration you can make your own implementation of the interface and replace it in the JobHostConfiguration. Take a look at this blog post where I made a small POC on the topic.

Answer 2

To use an external runtime service to define the name of the queue:
public class QueueNameResolver : INameResolver
{
public string Resolve(string practiceId)
{
//define in appsettings the queuename property
return CloudConfigurationManager.GetSetting("queuname");
//or some other service of your design
}
}
In the WebJob Code, Program.cs:
public void init()
{
// Retrieve storage account from connection string.
string azureJobStorageConnectionString = ConfigurationManager.ConnectionStrings["AzureWebJobsStorage"].ConnectionString;
var config =
new JobHostConfiguration(azureJobStorageConnectionString)
{
NameResolver = new QueueNameResolver()
};
host = new JobHost(config);
host.RunAndBlock();
}
as per azure doco