Java开发网 - Think in Java-Com bridge!

Topic: Think in Java-Com bridge!

1.Think in Java-Com bridge!

Posted by: juweiping
Posted on: 2002-12-12 12:58

Our company is developing the EAM(Enterprise Application Middleware),It's a platform which can produce the EA,concluding the Framwork for J2EE and .NET and component's manager for EJB,JSPtags,com,etc.
There is a problem of intercommunicating between java and com.I found the Java-com/Java-.Net bridge and used the product of j-integra(http://www.intrinsyc.com).
I want to know if somebody used it before,and what the Middleware value you think.

2.Re:Think in Java-Com bridge! [Re: juweiping]

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Posted by: wishmaster
Posted on: 2002-12-13 17:43

Just browsed the product you mentioned in your email, they exist for some reason, I believe.

Typical middleware products provide coommunication channels between Java and COM+, for example, webMethods Integration Server via Win32 package. With web services alternatives maturing on daily basis, for non-mission critical application integration, current web services offerings are sufficient; for larger scale EAI, you have consider enterprise applications that you are going to integrate: ERP(SAP: ALE/RFC via JCo), CRM(Java/COM), Call Center Applications, ECM, EIP and so on...therefore, I wouldn't think there will be much value to initiate an effort on building such integration application if your company is targeting large EAI market.

3.ORB桥接是最紧密集成形式 [Re: juweiping]

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Posted by: sothis
Posted on: 2002-12-21 15:47

企业级集成没有常规，能用就行。各家产品是八仙过海，各显神通。但是真正从程序的角度来看，任何集成手段最终都落到跨进程通信范畴内。
企业级系统的最本质特性是分布（平台/框架/语言...），分布的若干个进程，交流是关键。交流的东西无非就两点，数据和过程。数据交流就是DataBase/MOM/EDI等等，以异步和pull为特征，适合于不可靠网络、松散集成。过程交流就是RPC/ORB/Service/Adapter/Connector等，以同步和push为特征，适合于可靠网络、紧密集成。两者可以互相变通。比方说corba3中大举推动CORBA Messaging、TII，那么从原理上来讲现在已经可以在保持面向对象过程交流的基础上，实现请求的路由、存储转发等等。
过程交流因为一般讲求强类型约束所以从集成紧密度上面来讲，比数据交流要强。而ORB技术因为讲求面向对象的强类型约束所以是最紧密集成方式。在不同种类的对象模型之间不能互通，这时候就只有借助于桥接器。
不过经验表明桥接器因为太过复杂，所以学习成本太高。试问真正懂java的人月薪多少？真正懂com的人月薪多少？两个都精通的人有几个?开发就不用提了，用好还真不容易。
不好意思，没讲多少实质性的东西。给个建议是，如果有现成的桥接器，最好使用它而不是重新开发一个。