What are ORB-IOR-a servant-a POA manager
In CORBA, what are i) an ORB ii) an IOR iii) a servant iv) a POA and v) a POA manager?
Expert
i) Object Request Broker – is a piece of middleware software which permits programmers to make program calls from one computer to other through a network. ORBs promote interoperability of the distributed object systems since they enable users to form systems by piecing altogether objects from various vendors, and hence they communicate with each other through ORB.
ii) Interoperable Object Reference - An Interoperable Object Reference (IOR) is CORBA or RMI-IIOP reference which uniquely recognized an object on a remote CORBA server. IORs can be transmitted in binary over TCP/IP general General Inter-ORB Protocol (the encoding might be big-endian or little-endian), or serialized into a string of hexadecimal digits (that is, prefixed by the string IOR to facilitate transport by non-CORBA mechanisms like HTTP, FTP, and e-mail.
iii) A Servant – a Servant is an invocation target, having methods for handling the remote process invocations. In newer CORBA versions, the remote object on the server side is divided into the Object (i.e., exposed to remote invocations) and Servant (to which the former portion delegates the method calls).This can be one Servant per remote Object, or similar servant can support numerous (possibly all) objects, related with the given Portable Object Adapter. The Servant for each and every Object can be set or found “once and forever” (that is, servant activation) or dynamically selected each time the method on that object is invoked (that is, servant location). Both servant locator and servant activator can forward calls to the other server.
iv) Portable Object Adapter – It is a standard component in CORBA model. In CORBA, on server side, the POAs form a tree-like structure, where each and every POA is accountable for one or more objects being served. The branches of this tree can be independently activated or deactivated, having different code for the servant location or activation and various request handling policies.
v) Portable Object Adapter Manager – The POA manager encapsulates the processing state of one or more POAs. By invoking the operations on a POA manager, server applications can cause requests for the related POAs to be queued or discarded. Additionally, applications can employ the POA manager to deactivate the POAs.
MCP: Model Checker for C++ (MCP) is an explicit-state software model checker being introduced by the Robust Software Engineering group at NASA Ames Research Center (Thompson and Brat, 2008). MCP was constructed specifically to allow programs written i
Cursor: This is a visual representation of the existing position of the mouse on the user's virtual desktop. Cursor shapes are frequently set to symbolize the current state of a program – utilizing an hour glass shape to point out that the user
Define the term Return value: This is the value of the expression employed in a return statement.
Mini-Case The Hatcher Company is in the process of developing a new inventory management system. One of the event handling processes in that system is Receive Supplier Shipments. The (inexperie
Explain how to detect a sequence of ‘1101’ arriving serially from the signal line?
Why is the script recorded over the tested web pages not playback correctly?
Write the difference between collection and arrays?
What is meant by the single users system?
Implements clause: That part of a class header which points out which interfaces are applied by the class. A class might implement for more than one interface.
Transmission Control Protocol: It is the Transmission Control Protocol (abbreviated as TCP) is a set of rules which permit reliable communication among two processes across a network.
18,76,764
1932800 Asked
3,689
Active Tutors
1447683
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!