Component-based programming has become more popular than ever. An application is built that does not involve implementing components from different sellers, usually in some form. The need to leverage components distributed on machines has increased, as applications have grown more sophisticated. An example of a component-based Program is an alternative. An e-commerce program residing on a Web farm should submit orders to a backend Enterprise Resource Planning ERP program. Oftentimes, the ERP program may run on another operating system and resides on hardware. The Microsoft Distributed Component Object Model DCOM, a distributed object infrastructure which enables an application to invoke Component Object Model COM components installed on a different server, has been ported to a variety of non-Windows platforms. However, DCOM has not gained wide acceptance so it is utilized to facilitate communication between Windows and non windows computers. aws online course create components for the Windows platform which communicate with the system with a protocol.
Some services leveraged by an Application may not reside within the datacenter. If the application accepts credit card payment for goods it has to elicit the merchant bank’s assistance to process the credit card info of the customer. However, for all practical purposes, technologies like CORBA and Java RMI and DCOM are confined to components and programs installed inside the datacenter. Two reasons for this are these technologies leverage these protocols and protocols are oriented. Network administrators around the globe have implemented firewalls and routers to disallow every form of communication. It requires an act of God to get a network administrator to open ports. If you are lucky enough to get a Network administrator to open the ports that are appropriate up to support your support, chances are your clients. As a result protocols such as used by DCOM, CORBA, and Java RMI are not practical for Web scenarios
The problem, as I said, with these technologies is that they consequently cannot manage network interruptions and are connection oriented. You cannot make any assumptions concerning reliability or the quality of the connection because the World Wide Web is not under your control. The call the client makes to the server may fail if a network disturbance occurs. The nature of these technologies also makes it hard to construct the infrastructures that are load-balanced essential to achieve scalability. Once the link between the client and the server is severed, you cannot simply route the request. Developers have tried to conquer these limitations by Implementing a version known as stateless programming, but they have had limited success because the technology are rather heavy and make it costly to reestablish a connection with a remote object.