By Michi Henning
Written for the skilled C++ developer dealing with real-world CORBA for the 1st time, complex CORBA Programming with C++ is an invaluable consultant to present day hottest usual for disbursed computing.After a brief journey of CORBA fundamentals, the authors bounce correct in with a minimal skeleton software written in C++. From there, they supply actually large insurance of CORBA IDL, besides many information for utilizing IDL info kinds in C++. (They conceal complex positive aspects akin to any, TypeCode, and DynAny later within the book.).Next the ebook unveils its pattern program - a disbursed weather keep watch over approach. fabric at the moveable item Adapter and the article existence Cycle, together with rubbish assortment options, rounds out this part. extra chapters learn the main points of item Request agents (ORBs), together with web Inter-ORB Protocol (IIOP), repositories, and binding. The authors additionally current CORBA's integrated APIs for Naming, buying and selling, and occasion prone (including asynchronous occasion handling), that is most respected as reference material.Final sections learn recommendations for greater scalability, together with multithreading and optimizing community site visitors for CORBA items. The authors supply a variety of brief excerpts of C++ code, notwithstanding it needs to be acknowledged that a lot of this booklet is reference fabric instead of a hands-on programming educational.
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Extra resources for Advanced CORBA Programming with C++
The combination of endpoint information and object key can appear multiple times in an IOR. Such multiple endpoint-key pairs, known as multicomponent profiles, permit an IOR to efficiently support more than one protocol and transport that share information. An IOR can also contain multiple profiles, each containing separate protocol and transport information. The ORB run time dynamically chooses which protocol to use depending on what is supported by both client and server. The preceding discussion shows that all the essential ingredients for successful request dispatch are encapsulated in a reference.
42 IT-SC book: Advanced CORBA® Programming with C++ The C++ mapping does not change if client and server are collocated in the same address space. 6). 6 Proxy to collocated object. If client and server are collocated, the client's request is still transparently forwarded by the proxy to the correct servant; in this way, we preserve the location transparency of CORBA. (Some ORBs do not use a proxy for collocated objects. Instead, the servant object acts as the proxy. However, such implementations are not strictly compliant with the POA specification and do not strictly preserve location transparency.
The addressing information in the Endpoint Info field may directly contain the address and port number of the server that implements the object. However, in most cases, it contains the address of an implementation repository that can be consulted to locate the correct server. This extra level of indirection permits server processes to migrate from machine to machine without breaking existing references held by clients. CORBA also allows information for several different protocols and transports to be embedded in the reference, permitting a single reference to support more than one protocol (the ORB chooses the most appropriate protocol transparently).