Command Class

Article
11/19/2013

Command class that all Business Logic commands derive from. Each command implementation should implement an [Execute] method that performs the actual work for this command.

Inheritance Hierarchy

System.Object
Microsoft.TeamFoundation.Framework.Server.Command

Namespace: Microsoft.TeamFoundation.Framework.Server
Assembly: Microsoft.TeamFoundation.Framework.Server (in Microsoft.TeamFoundation.Framework.Server.dll)

Syntax

'Declaration
Public MustInherit Class Command _
    Implements ICommand, IDisposable

public abstract class Command : ICommand, 
    IDisposable

public ref class Command abstract : ICommand, 
    IDisposable

[<AbstractClass>]
type Command =  
    class 
        interface ICommand 
        interface IDisposable 
    end

public abstract class Command implements ICommand, IDisposable

The Command type exposes the following members.

Constructors

	Name	Description
	Command	All Commands have an [ICommandContext] that enables them to communicate with the calling application.

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Properties

	Name	Description
	CommandCacheLimit	Get/Set Global Command cache size limit.
	IsCacheFull	[IsCacheFull] returns [True] if the command cache is over the limit.
	IsCanceled	[IsStopped] returns true if the command has been stopped for any reason.
	MaxCacheSize	Get/Set command instance cache size limit.
	Name	Return the type name of this command.
	RequestContext	Context this command is executing.
	TotalResultSize	The [TotalResultSize] is the sum of all data sent that was ever added to the command cache. This gives an approximate representation the size of the response for the command.

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Methods

	Name	Description
	ContinueExecution	Derived classes can override [ContinueExecution] when the initial call to [Execute] returns partial results. This will allow the command to continue with the operation and retrieve more data for the response. If the command always returns completed results from the [Execute] method it does not have to implement this method.
	DecrementCacheUsage	[DecrementCacheUsage] is used to notify the command that data is being dropped from the cache, usually by returning it to the application.
	Dispose()	[IDisposable] implementation. When an [ICommandContext] ends, it will dispose each command that has been registered with it.
	Dispose(Boolean)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	(Overrides Object.Finalize().)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IncrementCacheUsage	[IncrementCacheUsage] is used to notify the command that data is being cached that can be sent to the client. Once the command caches enough data, this method returns [True] to the caller telling them that it has exceeded the maximum requested cache size. If the caller can stop execution and return its current data, it should do so at this point.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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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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