Dear Wiki user, You have subscribed to a wiki page or wiki category on "Ws Wiki" for change notification.
The following page has been changed by IgnacioSilvaLepe: http://wiki.apache.org/ws/Tuscany/TuscanyJava/SCA_Java/AsyncCallbacks New page: = Support for Async Callbacks = Async callbacks allow a component to perform a request on another component and to receive its response asynchronously via a callback. This feature follows the programming model specified in the SCA Client and Implementation Modle for Java (found in http://osoa.org/display/Main/Service+Component+Architecture+Specifications). Currently, async callbacks are supported for components wired via bindless references, and via references with a web services binding using Axis2 (WS/Axis2). == Async Callbacks via Bindless References == In this mode, a source component uses a reference that does not include a binding, which is then wired to a target component via a service that does not include a binding either. For an example, see the inner.composite sample. To illustrate, an excerpt of the SCDLs for the inner.composite sample is as follows: === Source Composite === Contained in InnerComposite.scdl <component name="InnerSourceComponent"> <implementation.java class="innercomposite.SourceImpl"/> <reference name="targetReference">TargetComponentRef</reference> </component> <reference name="TargetComponentRef"> <interface.java interface="innercomposite.Target" callbackInterface="innercomposite.SourceCallback"/> </reference> === Target Composite === Contained in InnerComposite2.scdl <service name="InnerTargetService" target="InnerTargetComponent"> <interface.java interface="innercomposite.Target" callbackInterface="innercomposite.SourceCallback"/> <reference name="innerSource">InnerTargetComponent</reference> </service> <component name="InnerTargetComponent"> <implementation.java class="innercomposite.TargetImpl"/> </component> === Containing Composite === Contained in default.scdl <component name="SourceComponent"> <implementation.composite name="InnerComposite" scdlLocation="InnerComposite.scdl"/> <reference name="TargetComponentRef2">TargetComponent2</reference> </component> <component name="TargetComponent2"> <implementation.composite name="InnerComposite2" scdlLocation="InnerComposite2.scdl"/> </component> == Async Callbacks via WS/Axis2 Binding == In this mode, the reference and service used by the source and target components use a WS/Axis2 binding (<binding.ws/>). For an example, see the helloworldws-async and helloworldwsclient-async samples. A preview of the SCDLs is as follows: === Server side === <service name="HelloWorldWebService" target="http:///foo";> <interface.wsdl xmlns:wsdli="http://www.w3.org/2006/01/wsdl-instance"; interface="http://helloworld#wsdl.interface(HelloWorld)" callbackInterface="http://helloworld#wsdl.interface(HelloWorldCallback)" wsdli:wsdlLocation="http://helloworld wsdl/helloworld.wsdl" /> <binding.ws endpoint="http://helloworld#wsdl.endpoint(HelloWorldService/HelloWorldSoapPort)" conformanceURIs="http://ws-i.org/profiles/basic/1.1"; location="wsdl/helloworld.wsdl" /> <reference>HelloWorldServiceComponent</reference> </service> <component name="HelloWorldServiceComponent"> <implementation.java class="helloworld.HelloWorldImpl" /> </component> === Client side === <component name="HelloWorldServiceComponent"> <implementation.java class="helloworld.HelloWorldServiceComponent"/> <reference name="helloWorldService">HelloWorldService</reference> </component> <reference name="HelloWorldService"> <interface.wsdl xmlns:wsdli="http://www.w3.org/2006/01/wsdl-instance"; interface="http://helloworld#wsdl.interface(HelloWorld)" callbackInterface="http://helloworld#wsdl.interface(HelloWorldCallback)" wsdli:wsdlLocation="http://helloworld wsdl/helloworld.wsdl" /> <binding.ws endpoint="http://helloworld#wsdl.endpoint(HelloWorldService/HelloWorldSoapPort)" location="wsdl/helloworld.wsdl" /> </reference> === Limitations === Currently, async callbacks over WS/Axis2 has the following limitations: * The callback interface can only use a single method * The WSDL definition in use must include a port type that describes the callback interface separately, see resources/META-INF/wsdl/helloworld.wsdl --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
