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Abstract For years middleware has been used to handle data movement across disparate platforms and between incompatible databases In addition middleware has made it easy for developers to handle the differences between platforms and databases by writing applications that connect to the middleware layer and by letting the middleware handle the data translation and transport Talarian Guide 2000 In this paper we will describe a series of related concept about middleware and especially analyse two types of middleware Message-Oriented Middleware MOM and Object Request Brokers ORBs both are competing to become the network standard for linking legacy systems to the web Finally by comparing of their advantages and limitations the specific type of middleware which is better suited to do the work is proposed Introduction of middleware Middleware is the wide range of services layered between the applications and an operating system that provide specialized services and interoperability between distributed applications For a variety of reasons including the fact that middleware is a relatively new category of software the functionality of different kinds of middleware is not standardized Andy 1999 For example the primary function of transaction processing middleware has to do with control but many transaction processing products also include communication services Middleware vendors add functions ensure that their products interoperate with a variety of hardware and software and to help differentiate their product from their competitors Because each product within a middleware category includes a variety of functionality and because the standard functions within each category change rapidly useful distinctions among middleware services are hard to find At current stage the middleware market can be broken into five different segments 1 Transaction processing monitors TPM 2 Remote procedure calls RPC 3 Object request brokers ORB 4 Homegrown middleware solutions 5 Message-oriented middleware MOM Talarian Guide 2000 Amongst these we are going to pacifically analyse two of them Message-oriented middleware MOM which is already in mature stage and Object request
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