IBM User Guide for Java V7 on Windows > IBM SDK for Java

The ORB

This description of the Object Request Broker (ORB) provides background information to help you diagnose problems with the ORB.

The IBM ORB ships with the JVM and is used by the IBM WebSphere Application Server. It is one of the enterprise features of the Java™ 2 Standard Edition. The ORB is both a tool and a runtime component. It provides distributed computing through the CORBA Internet Inter-Orb Protocol (IIOP) communication protocol. The protocol is defined by the Object Management Group (OMG). The ORB runtime environment consists of a Java implementation of a CORBA ORB. The ORB toolkit provides APIs and tools for both the Remote Method Invocation (RMI) programming model and the Interface Definition Language (IDL) programming model.

Note: The use of the Channel Framework ORB transport mode is deprecated in this release of the IBM SDK.

• CORBA
  The Common Object Request Broker Architecture (CORBA) is an open, vendor-independent specification for distributed computing. It is published by the Object Management Group (OMG).
• RMI and RMI-IIOP
  This description compares the two types of remote communication in Java; Remote Method Invocation (RMI) and RMI-IIOP.
• Java IDL or RMI-IIOP?
  There are circumstances in which you might choose to use RMI-IIOP and others in which you might choose to use Java IDL.
• RMI-IIOP limitations
  You must understand the limitations of RMI-IIOP when you develop an RMI-IIOP application, and when you deploy an existing CORBA application in a Java-IIOP environment.
• Further reading
  There are links to CORBA specifications, CORBA basics, and the RMI-IIOP Programmer's Guide.
• Examples of client–server applications
  CORBA, RMI (JRMP), and RMI-IIOP approaches are used to present three client-server example applications. All the applications use the RMI-IIOP IBM ORB.
• Using the ORB
  To use the Object Request Broker (ORB) effectively, you must understand the properties that the ORB contains. These properties change the behavior of the ORB.
• How the ORB works
  This description tells you how the ORB works, by explaining what the ORB does transparently for the client. An important part of the work is performed by the server side of the ORB.
• Additional features of the ORB
  Portable object adapter, fragmentation, portable interceptors, and Interoperable Naming Service are described.

Parent: IBM SDK for Java

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