Compact Framework - MSMQ

Hi,

MSMQ is essentially a messaging protocol that allows applications running on disparate servers to communicate in a failsafe manner. A queue is a temporary storage location from which messages can be sent when conditions permit.

Microsoft Message Queuing (MSMQ) technology enables applications running at different times to communicate across heterogeneous networks and systems that may be temporarily offline. MSMQ provides guaranteed message delivery, efficient routing, security, and priority-based messaging. It can be used to implement solutions for both asynchronous and synchronous messaging scenarios.

Basically certain applications will use this feature to ensure they receive the messages, as if they are not on, the message is queed for delivery to the application is back online.


You can also say MSMQ is a tool for sending and receiving messages. MSMQ is powerful enough to provide near real-time message exchange throughput, depending on the machines and transports involved in the exchange, and flexible enough to provide many features required in assembling a communications infrastructure for your application system. You can send MSMQ messages across machine boundaries - including across the Internet - to queues where a receiving application can retrieve them in a prioritized first-in first-out manner.

>> Purposes and situations we can use this.
Developers can use this to perform operations asynchronously; that is, beginning a process without waiting for the operation to complete. MSMQ has provided this facility to developers since its inception. It was especially useful for VB developers, because before MSMQ, there were very few options for managing an asynchronous process in VB.

For more info:
"Understanding MSMQ"
http://www.microsoft.com/technet/archive/winntas/proddocs/ntmsgqmn/msmqad01.mspx?mfr=true

"Microsoft Message Queuing"
http://www.microsoft.com/windowsserver2003/technologies/msmq/default.mspx

http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Q_22937448.html for details.

Message Queuing (MSMQ) technology enables applications running at different times to communicate across heterogeneous networks and systems that may be temporarily offline. Applications send messages to queues and read messages from queues. The following illustration shows how a queue can hold messages that are generated by multiple sending applications and read by multiple receiving applications.

Message Queuing is accessible by way of several programming interfaces. The .NET Framework includes a System.Messaging class library that allows access to MSMQ, and this is available to any one of 20 .NET languages, including VB.NET, C#, J#, and many others. In addition, there is a C/C++ library available, as well as a COM library for COM-enabled environments

Message Queuing can be accessed and used by any Windows application, including Windows Forms applications that present graphical user interfaces (GUIs), smart client applications built on top of the Microsoft Office System, server-side applications running within ASP.NET, Windows Services, and others.

http://msdn.microsoft.com/en-us/library/ms711472.aspx