Azure WebJobs and Service Bus : 2 settings for the same thing? - azure-webjobs

Question

When I add the following NuGet package to my WebJob: Microsoft.Azure.WebJobs.ServiceBus 2.0.0,
two new items are added to the app.config file.
It seems they are both used to define the Service Bus connection string.
Can I get rid of one of them?
<connectionStrings>
<add name="AzureWebJobsServiceBus" connectionString="..." />
</connectionStrings>
<appSettings>
<!-- Service Bus specific app setings for messaging connections -->
<add key="Microsoft.ServiceBus.ConnectionString" value="..." />
</appSettings>
Thanks for your help!

Answer 1

It seems they are both used to define the Service Bus connection string. Can I get rid of one of them?
According the source code of ServiceBusConfiguration, WebJob Service Bus SDK(ServiceBusTrigger) will use the connection string which stored under the connectionStrings section.
public string ConnectionString
{
get
{
if (!_connectionStringSet)
{
_connectionString = AmbientConnectionStringProvider.Instance.GetConnectionString(ConnectionStringNames.ServiceBus);
_connectionStringSet = true;
}
return _connectionString;
}
set
{
_connectionString = value;
_connectionStringSet = true;
}
}
You can also set the connection string at runtime.
JobHostConfiguration config = new JobHostConfiguration();
config.UseServiceBus(new ServiceBusConfiguration() { ConnectionString = "" });
JobHost host = new JobHost(config);
If you want to create a instance of Service Bus Client(for example QueueClient) to do some specific operations, you could use the Service Bus connection string configured in appSettings.
//Use CloudConfigurationManager to read the connection string stored in appSettings
string connectionString = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ConnectionString");
var client = QueueClient.CreateFromConnectionString(connectionString, "queueName");