Difference Between CORBA and RMI

CORBA (Common Object Request Broker Architecture) and RMI (Remote Method Invocation) are middleware technologies used for distributed computing, enabling objects to communicate across networked environments. While both facilitate remote object communication, they differ significantly in their approach, language support, and architectural complexity.

CORBA is a language-independent specification that allows objects written in different programming languages to communicate, while RMI is Java-specific technology for remote method calls between Java objects running on different JVMs.

What is CORBA?

CORBA (Common Object Request Broker Architecture) is a middleware specification that enables distributed objects in networked environments to communicate regardless of their programming language or platform. It provides a language-independent approach to distributed computing through standardized interfaces.

The core component of CORBA is the Object Request Broker (ORB), which acts as middleware between client and server objects. When a client needs to invoke a method on a remote server object, the ORB handles object location, activation, parameter marshalling, and communication management.

CORBA provides comprehensive services including security, transactions, naming services, and event handling, making it suitable for enterprise-level distributed applications requiring robust inter-language communication.

What is RMI?

RMI (Remote Method Invocation) is a Java-specific middleware technology that allows objects in one JVM to invoke methods on objects running in another JVM. It provides a simpler, platform-dependent approach to distributed computing within the Java ecosystem.

RMI works through remote interfaces and uses the RMI registry for object discovery. When a client wants to call a remote method, it obtains a reference from the RMI registry and invokes the method as if it were local. The RMI system handles parameter marshalling and result delivery automatically.

Key RMI features include automatic object serialization, stub generation for client-side proxies, and distributed garbage collection for managing remote object lifecycles.

Comparison Between CORBA and RMI

Conclusion

CORBA provides language-independent distributed computing through ORB middleware, making it ideal for complex heterogeneous systems, while RMI offers simpler Java-to-Java remote communication with better performance. The choice depends on language requirements and system complexity needs.