Mobile Ad Hoc Services: Semantic Service Discovery in Mobile Ad Hoc Networks

Improving device-aware Web services and their mobile clients through an aspect-oriented, model-driven approach

“…(1) <c:setVariable select= ''$ownedOperation/ ownedParameter[not(@direction='return')]" var="ImputParams"/> (2) <c:setVariable select= ''$ownedOperation/ ownedParameter[@direction='return']" var="OutputParams"/> (3) package <c:get select="$xmi/package/@name" / >; (4) public aspect Aspect_<c:get select="$xmi/ package/@name" />_<c:get select=$packagedElement/@name" />_<c:get select="$ownedOperation/@name"/>{ (5) pointcut PC_<c:get select="$packagedElement/@name" />_<c:get select= ''$ownedOperation/@name" /> (<c:iterate select="$ImputParams" var="myOwnedParameter" delimiter=", ''><c:get select="substringafter($myOwnedParameter/type/@href, '#')"/ > <c:get select="$myOwnedParameter/@name"/ ></c:iterate>): execution( * <c:get select="$packagedElement/@name" (6) <c:get select="$ownedOperation/@name" / >(<c:iterate select="$ImputParams" var="myOwnedParameter" delimiter=", ''><c:get select="substringafter($myOwnedParameter/type/@href, '#')"/ ></c:iterate>))&&args(<c:iterate select="$ImputParams" var="myOwnedParameter" delimiter=", ''><c:get select="$myOwnedParameter/@name"/ ></c:iterate>); <c:get select="substringafter($OutputParams/type/@href, '#')"/> around(<c:iterate select="$ImputParams" var="myOwnedParameter" delimiter=", ''><c:get select="substringafter($myOwnedParameter/type/@href, '#')"/ > <c:get select="$myOwnedParameter/@name"/ ></c:iterate>): PC_<c:get select="$packagedElement/@name" />_<c:get select="$ownedOperation/@name" /> (<c:iterate select="$ImputParams" var="myOwnedParameter" delimiter=", ''><c:get select="$myOwnedParameter/@name"/ ></c:iterate>){ (7) deviceType device= MyHandlerClass.getDeviceType(); (8) <c:get select="substringafter($OutputParams/type/@href, '#')"/>_Extended tmp = (<c:get select="substring-after ($OutputParams/type/@href, '#')"/ >_Extended) proceed((<c:iterate select="$ImputParams" var="myOwnedParameter" delimiter=", ''><c:get select="substringafter($myOwnedParameter/type/@href, '#')"/ > <c:get select="$myOwnedParameter/@name"/ ></c:iterate>); (9) if (device==deviceType.CLDC){ <c:get select="substringafter($OutputParams/type/@href, '#')"/>_Base tmp2 = tmp.convertToBase(); tmp=tmp2;} (10) return tmp; } } This template code is executed after the main template one's, in which, through a set of iterations, we move along the XMI file and specify that this code should be generated for all Web service operations stereotyped with <<ws4mmd>> in the UML model. Thus, as a result an aspect is generated for each operation which is also going to be offered for mobile devices.…”

“…(1) HttpTransport httpt = new HttpTransport (''http://localhost:8080/ AA_BiblioHan_WS/services/InfoBook"); (2) SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.…”

“…In this regard, developed clients will vary widely depending on the target device: there may not only be considerable differences between a mobile phone and a desktop computer, but also between clients developed for different types of mobile device. Furthermore, not only screen size, but also runtime capacity needs to be considered [2]. In this sense, we can say that desktop computers and laptops are the most powerful clients, allowing any type of computation, and are provided with screens which are expected to be large enough for information to be displayed clearly.…”

Probabilistic Discovery of Semantically Diverse Content in MANETs

“…Discovery queries in OntoMobil [22] accept a set of concepts describing the capabilities of services or generally the semantics of required content. The mechanism that disseminates these queries exploits the randomised overlay to locate nodes having ontologies with concepts equivalent to the concepts that compose the discovery queries.…”

A Gossip Protocol to Support Service Discovery with Heterogeneous Ontologies in MANETs

“…This paper describes the gossip protocol that provides the substrate for discovery. The actual discovery process is elaborated in [20].…”