RoleInstance Class

Article
08/18/2015

Represents an instance of a role.

Namespace: Microsoft.WindowsAzure.ServiceRuntime
Assembly: Microsoft.WindowsAzure.ServiceRuntime (in Microsoft.WindowsAzure.ServiceRuntime.dll)

Inheritance Hierarchy

System.Object
Microsoft.WindowsAzure.ServiceRuntime.RoleInstance

Syntax

public abstract class RoleInstance

public ref class RoleInstance abstract

[<AbstractClass>]
type RoleInstance = class end

Public MustInherit Class RoleInstance

Properties

	Name	Description
	FaultDomain	Gets an integer value that indicates the fault domain in which the role instance is running.
	Id	Gets the instance identifier (ID) of the role instance.
	InstanceEndpoints	Gets the set of endpoints that are associated with the role instance.
	Role	Gets the Role object that is associated with the role instance.
	UpdateDomain	Gets an integer value that indicates the update domain in which the role instance is running.
	VirtualIPGroups

Methods

	Name	Description
	Equals(Object)	(Inherited from Object.)
	Finalize()	(Inherited from Object.)
	GetHashCode()	(Inherited from Object.)
	GetType()	(Inherited from Object.)
	MemberwiseClone()	(Inherited from Object.)
	ToString()	(Inherited from Object.)

Remarks

A hosted service in Azure can be defined to contain web roles, worker roles, and VM roles. A role is a component of an application that performs specific functionality. A role instance is a running copy of the role in Azure or the Azure Compute Emulator. Roles are defined in the service model for the hosted service. For more information, see Setting Up a Hosted Service for Azure.

The following code example shows how to retrieve information about role instances:

foreach (var role in RoleEnvironment.Roles) 
{
   foreach (var roleInstance in role.Value.Instances)      
   {
      Trace.WriteLine("Role Instance ID: " + roleInstance.Id, "Information");
      foreach (RoleInstanceEndpoint instanceEndpoint in roleInstance.InstanceEndpoints.Values) 
      {
         Trace.WriteLine("Instance endpoint IP address and port: " + instanceEndpoint.IPEndpoint, "Information"); 
      }
      Trace.WriteLine("Role instance fault domain: " + roleInstance.FaultDomain, "Information");
      Trace.WriteLine("Role for the instance: " + roleInstance.Role.Name, "Information");
      Trace.WriteLine("Role instance update domain: " + roleInstance.UpdateDomain, "Information");
   }
}

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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