Common Object Request Broker Architecture (CORBA)

CORBA Architecture
Common Object Request Broker Architecture (CORBA) allows the heterogeneous collection and distributed objects to interoperate. It is a standard defined by Object Management Group (OMG), and it defines the protocols and interferences that distributed objects utilize in the process of interacting with each other.  CORBA’s major features and components include the following:  The Object Request Broker (ORB), which is charged with the interaction between remote objects and the applications that use such objects. It also has an Inter-ORB Protocol (García-Valls et al., 2018). The Interference Definition Language (IDL) is another component of the architecture, and it shows how CORBA interferences are defined.  Another feature is the naming service, which allows CORBA’s remote clients to find needed remote objects within the network.  The Portable Object Adapter activates or deactivates objects, mapping their ids to the actual object implementation.
Advantages of CORBA
CORBA architecture has numerous advantages over other architectures. One advantage is that it supports many computer languages and allows mixing such languages using a single distributed application. CORBA is also object and distribution oriented. It is an industry-standard and therefore creates competition among other vendors, which ensures the existence of quality implementations. It is also portable to some degree between implementations.  The architecture promotes interoperability, and many distributed objects can build on top of different CORBA products. Lastly, the architecture is heavily backed by big and powerful companies such as banks, software companies, cable companies, and phone companies. CORBA demonstrates high levels of maturity, scalability, and efficiency.
Disadvantages of CORBA
It is firewall unfriendly in that it only has vendor-specific options. There is no specific standard that binds ORB and its clients to a port range.  Another disadvantage is that the architecture is perceived as complicated. There are no standards to get initial naming service references. The architecture lacks an official Perl making in that there are few Perl ORBs available in open source, but none have an official mapping, and the implementation is incomplete.
J2EE Architecture
Java 2 Enterprise Architecture (J2EE) is a computing technology that provides enterprise applications with services using a multi-layer architecture. J2EE is made up of various components and has various distinctive features.  It has JavaServer Pages (JSP), Enterprise JavaBeans (EJB), and Java servlets modules. The components enable the building of distributes applications on a large scale.J2EE also has the Java Naming and Directory Interference (JNDI), making access to distributed objects possible through name lookups (Jensen, 2000). The Java Transaction API (JTA) allows high-level access to transaction services (distributed).  Java Transaction Service (JTA) allows integration with other architectures such as CORBA distributed transaction services.  The JavaBeans Activation Framework (JAF) maps JavaBeans to file extensions and Multipurpose Internet Mail Extensions (MIME) types.
Advantages of J2EE
The J2EE platform provides complete web service support. Java developers can develop SOAP-based portable and interoperable web services. The architecture also offers a faster solution to the delivery time to the market in that it uses ‘containers’ which make development simpler. The infrastructure offers vendors the freedom of choice as it is set on standards that can be implemented by many vendors. The vendors do not have to compete on standards or APIs. Most competition is on the implementation of the J2EE.  J2EE CTS also helps ensure compatibility among application vendors and allows portability of components written on the J2EE platform. It is also easier to connect applications and systems through J2EE. The platform, therefore, avoids the single source for their software needs and also aids IT by reducing the total cost of ownership (TCO). It also handles high volume and complex high transaction applications and has a proven track record (Jensen, 2000).
Disadvantages
There is a huge learning curve that is associated with J2EE due to the growth of specifications. Developers are also restricted on what they can do. For instance, they are not allowed to write their own control threads or schedule tasks periodically. The application becomes noninteroperable across various application servers due to proprietary vendor extensions, which are available in large numbers. The development environment for J2EE is complex, and tools can be difficult to use.

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