Eric lippert - Amazon Web Services

Many more such customizations are possible. A Team Foundation
Server Power Tool (http://www.microsoft.com/en-in/download/
details.aspxid=35775) makes it easy to customize processes as
you need.
TFS 2012 is a set of WCF services. These services are exposed for
extension by a well published object model. This object model is
encapsulated in components i.e. TFS APIs. The structure of these
APIs is:
One of the most popular use of this object model is to write an
event handler that executes when a certain event is raised by
TFS. For example, when someone creates a new work item, we
may want to check if the work item type of that newly created
work item is a ‘User Story’ and spawns a set of work items of the
type ‘Task’ to implement that user story. In this case, we can
create an event handler for the event of ‘WorkItemChanged’.
For this, we can write a class that implements Microsoft.
TeamFoundation.Framework.Server.ISubscriber interface. In the
ProcessEvent method, we can write the code that will execute
when the event happens. Snippet of boilerplate code is as
follows:
WorkItemChangedEvent)
{
string machineName = System.Environment.MachineName;
TfsTeamProjectCollection tpc = new
TfsTeamProjectCollection(new Uri(“http://” +
machineName + “:8080/tfs/DefaultCollection”));
WorkItemChangedEvent ev = notificationEventArgs as
WorkItemChangedEvent;
WorkItemStore ws = tpc.GetService();
Microsoft.TeamFoundation.WorkItemTracking.
Client.WorkItem wi = ws.GetWorkItem(ev.
CoreFields.IntegerFields[0].NewValue);
Project project = ws.Projects[ev.PortfolioProject];
if (wi.Type == project.WorkItemTypes[“User Story”]
&& wi.RelatedLinkCount == 0)
{
Microsoft.TeamFoundation.WorkItemTracking.
Client.WorkItem NewTask = new Microsoft.
TeamFoundation.WorkItemTracking.Client.
WorkItem(project.WorkItemTypes[“Task”]);
NewTask.Title = “Create architecture diagrams
for user story “ + wi.Id;
WorkItemLinkTypeEnd linkTypeEnd =
ws.WorkItemLinkTypes.
LinkTypeEnds[“Parent”];
NewTask.Links.Add(new
RelatedLink(linkTypeEnd,wi.Id));
NewTask.Save();
}
}
return EventNotificationStatus.ActionApproved;
}
Similar to ‘WorkItemChanged’ event, TFS raises following events
for which we can write various event handlers:
public EventNotificationStatus ProcessEvent(TeamFound
ationRequestContext requestContext, NotificationType
notificationType, object notificationEventArgs, out int
statusCode, out string statusMessage, out Microsoft.
TeamFoundation.Common.ExceptionPropertyCollection properties)
{
statusCode = 0;
statusMessage = string.Empty;
properties = null;
if (notificationType == NotificationType.
Notification && notificationEventArgs is
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