CNonStatelessWorker Class

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Receives requests from a thread pool and passes them on to a worker object that is created and destroyed on each request.

Syntax

template <class Worker>  
class CNonStatelessWorker

Parameters

Worker
A worker thread class conforming to the worker archetype suitable for handling requests queued on CThreadPool.

Members

Public Typedefs

Public Methods

Remarks

This class is a simple worker thread for use with CThreadPool. This class doesn't provide any request-handling capabilities of its own. Instead, it instantiates one instance of Worker per request and delegates the implementation of its methods to that instance.

The benefit of this class is that it provides a convenient way to change the state model for existing worker thread classes. CThreadPool will create a single worker for the lifetime of the thread, so if the worker class holds state, it will hold it across multiple requests. By simply wrapping that class in the CNonStatelessWorker template before using it with CThreadPool, the lifetime of the worker and the state it holds is limited to a single request.

Requirements

Header: atlutil.h

CNonStatelessWorker::Execute

Implementation of WorkerArchetype::Execute.

void Execute(
    Worker::RequestType request,
    void* pvWorkerParam,
    OVERLAPPED* pOverlapped);

Remarks

This method creates an instance of the Worker class on the stack and calls Initialize on that object. If the initialization is successful, this method also calls Execute and Terminate on the same object.

CNonStatelessWorker::Initialize

Implementation of WorkerArchetype::Initialize.

BOOL Initialize(void* /* pvParam */) throw();

Return Value

Always returns TRUE.

Remarks

This class does not do any initialization in Initialize.

CNonStatelessWorker::RequestType

Implementation of WorkerArchetype::RequestType.

typedef Worker::RequestType RequestType;

Remarks

This class handles the same type of work item as the class used for the Worker template parameter. See CNonStatelessWorker Overview for details.

CNonStatelessWorker::Terminate

Implementation of WorkerArchetype::Terminate.

void Terminate(void* /* pvParam */) throw();

Remarks

This class does not do any cleanup in Terminate.

See Also

CThreadPool Class
Worker Archetype
Classes