com.gwtplatform.dispatch.client.OldDelegatingAsyncCallback Maven / Gradle / Ivy
/*
* Copyright 2013 ArcBees Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.gwtplatform.dispatch.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandler;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandlerMismatchException;
import com.gwtplatform.dispatch.client.actionhandler.ExecuteCommand;
import com.gwtplatform.dispatch.shared.DispatchRequest;
import com.gwtplatform.dispatch.shared.TypedAction;
/**
* {@code AsyncCallback} implementation wrapping another {@link AsyncCallback} object used by a
* {@link ClientActionHandler} to delegate the execution result.
*
* @param the {@link TypedAction} type.
* @param the result type for this action.
*/
@Deprecated
public class OldDelegatingAsyncCallback, R> implements AsyncCallback<
ClientActionHandler>, ExecuteCommand {
private final DispatchCall dispatchCall;
private final A action;
private final AsyncCallback callback;
private final DelegatingDispatchRequest dispatchRequest;
public OldDelegatingAsyncCallback(DispatchCall dispatchCall,
A action,
AsyncCallback callback,
DelegatingDispatchRequest dispatchRequest) {
this.dispatchCall = dispatchCall;
this.action = action;
this.callback = callback;
this.dispatchRequest = dispatchRequest;
}
@SuppressWarnings("unchecked")
@Override
public void onSuccess(ClientActionHandler clientActionHandler) {
if (clientActionHandler.getActionType() != action.getClass()) {
delegateFailure(clientActionHandler);
} else if (dispatchRequest.isPending()) {
delegateExecute((ClientActionHandler) clientActionHandler);
}
}
@Override
public void onFailure(Throwable caught) {
dispatchRequest.cancel();
dispatchCall.onExecuteFailure(caught);
}
@Override
public DispatchRequest execute(A action, AsyncCallback resultCallback) {
if (dispatchRequest.isPending()) {
return dispatchCall.processCall();
} else {
return null;
}
}
private void delegateFailure(ClientActionHandler clientActionHandler) {
ClientActionHandlerMismatchException exception =
new ClientActionHandlerMismatchException(action.getClass(), clientActionHandler.getActionType());
onFailure(exception);
}
private void delegateExecute(ClientActionHandler clientActionHandler) {
dispatchRequest.setDelegate(clientActionHandler.execute(action, callback, this));
}
}