Taosoftware Developer Blog

Tapestry4になって、Engine Serviceの記述方法ががらっと変わりました。

Tapestry3では、application specificationに記述をしましたが、Tapestry4では、HiveMindに設定をします。
以下の設定では、dataSqueezerや、Engine Service内でVisitオブジェクトを使用したいため、サービスを追加しています。

hivemodule.xml

<contribution configuration-id="tapestry.state.ApplicationObjects">
<state-object name="AppVisit" scope="session">
<create-instance class="jp.co.taosoftware.tagraw.tape.AppVisit" />
</state-object>
</contribution>
<contribution configuration-id="tapestry.services.ApplicationServices">
<service name="SessionService" object="service:SessionService"/>
</contribution>
<service-point id="SessionService" interface="org.apache.tapestry.engine.IEngineService">
<invoke-factory>
<construct class="jp.co.taosoftware.tagraw.service.SessionService">
<set-object property="exceptionReporter" value="infrastructure:requestExceptionReporter"/>
<set-object property="response" value="infrastructure:response"/>
<set-object property="linkFactory" value="infrastructure:linkFactory"/>
<set-object property="dataSqueezer" value="infrastructure:dataSqueezer"/>
<set-service property="appStateMgr" service-id="tapestry.state.ApplicationStateManager"/>
</construct>
</invoke-factory>
</service-point>

SessionService.java

public class  SessionService extends BaseEngine implements IEngineService {
public static final String SERVICE_NAME = "SessionService";
/** @since 4.0 */
private RequestExceptionReporter _exceptionReporter;
private LinkFactory _linkFactory;
private WebResponse _response;
//Inject
private DataSqueezer squeezer;
private ApplicationStateManager appStateMgr;
public String getName() {
return SERVICE_NAME;
}
public ILink getLink(boolean aPost, Object parameter) {
Map parameters = new HashMap();
parameters.put(ServiceConstants.SERVICE, getName());
return _linkFactory.constructLink(this, false, parameters, true);
}
public void service(IRequestCycle aCycle) throws IOException {
String outString = "OK";
AppVisit visit = (AppVisit)getAppStateMgr().get("AppVisit");
OutputStream output = _response.getOutputStream(new ContentType("text/html"));
output.write(outString.getBytes());
}
public DataSqueezer getDataSqueezer() {
return this.squeezer;
}
public void setDataSqueezer(DataSqueezer aSqueezer) {
this.squeezer = aSqueezer;
}
public UserFacade getUserFacade() {
return this.userFacade;
}
public void setUserFacade(UserFacade aUserFacade) {
this.userFacade = aUserFacade;
}
public ApplicationStateManager getAppStateMgr() {
return this.appStateMgr;
}
public void setAppStateMgr(ApplicationStateManager aAppStateMgr) {
this.appStateMgr = aAppStateMgr;
}
public IAuthenticateStrategy getAuthenticateStrategy() {
return this.authenticateStrategy;
}
public void setAuthenticateStrategy(IAuthenticateStrategy aAuthenticateStrategy) {
this.authenticateStrategy = aAuthenticateStrategy;
}
/** @since 4.0 */
public void setExceptionReporter(RequestExceptionReporter exceptionReporter)
{
_exceptionReporter = exceptionReporter;
}
/** @since 4.0 */
public void setLinkFactory(LinkFactory linkFactory)
{
_linkFactory = linkFactory;
}
/** @since 4.0 */
public void setResponse(WebResponse response)
{
_response = response;
}
public RequestExceptionReporter get_exceptionReporter() {
return this._exceptionReporter;
}
}

実際には、getLinkのparameterのセットや、serviceメソッドを上記ソースコードに記述していくことになります。
http://localhost:8080/tagraw/app?service=SessionServiceにアクセスをすると、serviceメソッドが呼び出されます。

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