CORBA 和 DCOM 是用于处理分布式对象的两种中间件解决方案。这些解决方案提供了对分布式计算对象的更好控制，但问题是将哪种技术作为标准。让我们看看它们之间的详细比较。
1. 通用对象请求代理架构(CORBA)：
Common Object Request Broker Architecture 是分布式对象的详细规范。它是由 OMG(对象管理组)引入的。该体系结构描述了一种具有名为 ORB(对象请求代理)的独立于平台的对象总线的语言。这些使对象透明地发出请求并接收来自远程对象的响应。这也支持处理并发和处理异常。
2.分布式组件对象模型(DCOM)：
分布式组件对象模型是由 Microsoft 以其 Window NT 作为捆绑包引入的。 DCOM 与 Windows 中的 Internet Explorer 一起使用，预计它会吸引开发人员使用他们拥有的东西而不是购买。 DCOM 也是一种对象总线，有助于规范对象接口和调用支持分布式环境的动态对象导出。这支持共享 if 代码并要求使用对象接口声明共享代码。
CORBA 和 DCOM 之间的差异：
| Basis of | CORBA | DCOM |
|---|---|---|
| Introduced by | It was introduced by Object Management Group | It was introduced by Microsoft |
| Focuses on | This focus on Enterprise first and then Desktop | This focus on Desktop first and then Enterprise |
| Platforms | It is available on Unix, Windows and Macintosh. | It is available with Windows NT and Full support with all versions of Windows, Unix and Macintosh |
| Object Implementation | Various languages are supported as long as IDL can mapped to this language | Many languages are supported as Java, COBOL, C++, and Delphi but specification is done with binary language |
| Client/Server Interface | Interface at Client side is stub and Server side is skeleton | Interface at Client side is proxy and Server side is stub |
| Object Activation and Location | Here Object Adapter is used for activation and ORB is used for location | Here SCM (Service Control Manager) is used for activation and location |
| Inheritance | Supports inheritance with interface level when every interface is inherited from CORBA object. | Supports multiple inheritance when object implements IUnknown interface. |
| Garbage Collection | It does not provide general purpose Distributed Garbage Collection | It provides general purpose Distributed Garbage Collection through pinging the wire. |
| Exception Handling | The care is taken by Exception objects | Exception are thrown out to HRESULT and for other exceptions ISupportErrorInfo interface has to be implemented |
| Availability | It is available by multiple vendors | It is available via single vendor |