In a previous post I mentioned using the Service Management API sample library to call out to the Azure fabric from within a C# application.
The natural progression from here was to get the code working from within a web or worker role instance hosted within the cloud. Using a web role, I used the OnStart method to set up a IServiceManagent class that could then be shared with the remainder of the classes within the role.
When tracing the hosted services from either the OnStart method or from within default.aspx.cs I could successfully print out all of the services within my account. However, when I set up a WCF REST service to return these hosted services in an array I started to get an error with the connection to the Management API. Giving a argument error stating that a property with the name “httpRequest” is not present. This was even happening when I was using exactly the same code as I was elsewhere.
After a push in the right direction from Simon Davies we found out that the issue was in the WCF REST service already having an OperationContext from the original REST call before calling out to the Service Management API. This handy blog post, help solve all my issues, all that was needed was to create a second OperationalContext before calling the management service.
Ta dar … everything now works, we can use the above code snippet to retrieve back all our hosted services by calling our own web role.
