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package de.swm.gwt.client.asyncjs;

import com.google.gwt.inject.client.AsyncProvider;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.inject.Inject;

import de.swm.gwt.client.eventbus.ICustomData;
import de.swm.gwt.client.eventbus.IDispatcher;
import de.swm.gwt.client.eventbus.IEvent;
import de.swm.gwt.client.eventbus.IEventHandler;
import de.swm.gwt.client.interfaces.IAssembler;
import de.swm.gwt.client.interfaces.ILocation;
import de.swm.gwt.client.progressbar.IProgressBarNoCancelWaitDialog;



/**
 * Wrapped einen synchronen Assembler in einen Asynchronen.
 * 
 * @author wiese.daniel 
* copyright (C) 2011, SWM Services GmbH * * @param * der typ des zu Wrappenden Assemblers. */ public abstract class AbstractAsyncAssembler implements IAssembler, IEventHandler { @Inject private IProgressBarNoCancelWaitDialog progressBarWaitDialog; @Inject private IDispatcher dispatcher; private final IModuleActivation forModule; private final AsyncProvider asynchAssembler; private boolean isAssembledAndDownloaded = false; /** * Default constructor. * * @param forModule * derfiniert mit welchem Modul-Event die Assemblierung ansynchron angestossen werden soll. * @param asynchAssembler * der zu wrappende Assembler, der nach dem Event asynchron (nachladen von JS) aufgerufen werden soll. */ public AbstractAsyncAssembler(IModuleActivation forModule, AsyncProvider asynchAssembler) { this.forModule = forModule; this.asynchAssembler = asynchAssembler; } /** * Erzeugt die {appName} Anwendung. */ public void assemble() { dispatcher.registerEventTypes(this.forModule, this); } @Override public void handleEvent(IEvent eventType, ILocation location, final ICustomData customData) { AsyncCallback callback = new AsyncCallback() { @Override public void onFailure(Throwable arg0) { Window.alert("Kann nicht asynchron den Java-Scipt-Code fuer das Modul (" + forModule.eventName() + ") nachladen, prüfen Sie bitte ihre Netzwerkverbindung"); } @Override public void onSuccess(T assembler) { if (!isAssembledAndDownloaded) { assembler.assemble(); isAssembledAndDownloaded = true; } if (customData.forwardEvent() != null) { customData.forwardEvent().execute(); } } }; asynchAssembler.get(progressBarWaitDialog.start(callback)); } }




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