Jason Gordon

Last month in Part I (WSJ Vol. 2 Issue 1) we discussed J2ME and accessing Web services from wireless devices using the XML-RPC protocol. In this article, we will consider SOAP as a vehicle for accessing Web services from wireless devices, comparing and contrast-ing it with XML-RPC. Our sample application will again be a J2ME midlet, however, we will use EnhydraME's kSOAP rather than kXML-RPC to provide the protocol's implementation. Overview of SOAP The Simple Object Access Protocol is, according to the 1.1 specification, "a lightweight protocol for exchange of information in a decentralized, distributed environment." The protocol is entirely based on XML, vendor-neutral, and one of the cornerstone technologies in the Web services revolution. It is quite similar to XML-RPC, but we will examine that more closely in the next section. SOAP was originally conceived and ... (more)

Wireless Web Serviceswith J2MERemote Possibilities

What happens when the hype of Web services meets the increasingly popular and ever-changing world of wireless computing? Most likely, confusion and disillusionment. In this two-part article, we'll explore the uncharted waters of wireless Web services. We'll use the J2ME platform for developing our Web service clients and access remote services on the Internet using standardized industry protocols. In this first article, we'll examine XML-RPC, a simple, lightweight mechanism for invoking remote services with XML. The second article will compare and contrast XML-RPC with SOAP, a mo... (more)