XML based messaging service system by JavaSpaces

We present an XML based messaging model in JavaSpaces, called JSMS (JavaSpaces Messaging Service). We use XML to express messages which are exchanged between applications with a tree structure. Using DOM-API or SAX-API, we can access messages in XML-form, and are able to use the information within the message. Thus, if a message is defined with XML, messaging based on the content of message can be realized. Furthermore, in order to implement persistent storage of messages, we employ a distributed object technology called JavaSpaces. JavaSpaces allows persistency and transaction processing. Moreover, using JavaSpaces, the protocol considered processes XML-form message strongly. This protocol is a concept called message-tree. This paper introduces how to define a message by XML, the message-tree, and the composition of the JSMS system