RoleEnvironment.GetLocalResource("LocalTempFolder")Īnd expect to get a useful result back. Inside of a Windows Service (which is outside of the Role environment), the RoleEnvironment object is not populated. However, there are some things your Windows Service can’t do, but that your Role can: access RoleEnvironment! Problem Querying Local Storage from a Windows Service See also David Aiken’s post on running a startup task as a specific user.] [Your Startup Tasks might also have more powers than your Roles, if you configure them to run with elevated privileges using executionContext=”elevated” as in: Due to this, your Windows Service can do things your Role can’t, such as write to the file system generally, access Active Directory commands, and more. Your Windows Service runs as the very powerful LocalSystem account, while your Roles run as a lower priviledge user. This is due to the differences in their security contexts. Well… your Windows Service does not exactly have Super Powers, but it does have powers and abilities far above those of ordinary Roles. What happens if I am inside of a Windows Service? Your Windows Service Has Super Powers #ACCESS TO INSTALLUTIL.INSTALLLOG IS DENIED WHEN INSTALLING A WINDOWS SERVICE CODE#But calling RoleEnvironment.GetLocalResource only works from within the safe confines of a your Role code – as in a Worker Role or Web Role – you know, the process that inherits from (and completes) the RoleEntryPoint abstract class. Now you can use “the usual” classes to write and read these files. Var pathToFileName = pathToReadWriteFolder + "foo.txt" Var pathToReadWriteFolder = localResource.RootPath RoleEnvironment.GetLocalResource("LocalTempFolder") #ACCESS TO INSTALLUTIL.INSTALLLOG IS DENIED WHEN INSTALLING A WINDOWS SERVICE FULL#You can read more about the details over in Neil Mackenzie’s post, but the main thing you need to do is call a method to access the full path to the read/write folder associated with the name you provided (e.g., “LocalTempFolder” in the config snippet above). To specificy your intent to use a Local Storage location, you add an entry to ServiceDefinition.csdef under the specific role from which you plan to access it. Windows Azure uses these named locations to provide us managed local, writeable folders which it calls Local Storage. We can declare multiple such logical names. Instead of hard-coding a path into our code, we declare in our service model that we plan to write data to disk, and we supply it with a logical name. As you may know, Windows Azure roles do not generally write freely to the file system.
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