/**
* 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.rpc.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.gwtplatform.common.client.IndirectProvider;
import com.gwtplatform.dispatch.client.DelegatingDispatchRequest;
import com.gwtplatform.dispatch.client.DispatchCall;
import com.gwtplatform.dispatch.client.ExceptionHandler;
import com.gwtplatform.dispatch.client.GwtHttpDispatchRequest;
import com.gwtplatform.dispatch.client.OldDelegatingAsyncCallback;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandler;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandlerRegistry;
import com.gwtplatform.dispatch.rpc.client.interceptor.RpcInterceptorRegistry;
import com.gwtplatform.dispatch.rpc.shared.Action;
import com.gwtplatform.dispatch.rpc.shared.DispatchServiceAsync;
import com.gwtplatform.dispatch.rpc.shared.Result;
import com.gwtplatform.dispatch.shared.DispatchRequest;
import com.gwtplatform.dispatch.shared.SecurityCookieAccessor;
/**
* A class representing an undo call to be sent to the server using RPC.
*
* @param <A> the {@link Action} type.
* @param <R> the {@link Result} type for this action.
*/
public class RpcDispatchUndoCall<A extends Action<R>, R extends Result> extends DispatchCall<A, R> {
private static class AsyncCallbackWrapper<R extends Result> implements AsyncCallback<R> {
private final AsyncCallback<?> wrapped;
AsyncCallbackWrapper(AsyncCallback<?> wrapped) {
this.wrapped = wrapped;
}
@Override
public void onFailure(Throwable caught) {
wrapped.onFailure(caught);
}
@Override
public void onSuccess(R result) {
wrapped.onSuccess(null);
}
}
private final DispatchServiceAsync dispatchService;
private final RpcDispatchHooks dispatchHooks;
private final RpcInterceptorRegistry interceptorRegistry;
private final ClientActionHandlerRegistry clientActionHandlerRegistry;
private final R result;
RpcDispatchUndoCall(
DispatchServiceAsync dispatchService,
ExceptionHandler exceptionHandler,
ClientActionHandlerRegistry clientActionHandlerRegistry,
RpcInterceptorRegistry interceptorRegistry,
SecurityCookieAccessor securityCookieAccessor,
RpcDispatchHooks dispatchHooks,
A action,
R result,
AsyncCallback<Void> callback) {
super(exceptionHandler, securityCookieAccessor, action, new AsyncCallbackWrapper<R>(callback));
this.dispatchService = dispatchService;
this.dispatchHooks = dispatchHooks;
this.interceptorRegistry = interceptorRegistry;
this.clientActionHandlerRegistry = clientActionHandlerRegistry;
this.result = result;
}
@Override
public DispatchRequest execute() {
dispatchHooks.onExecute(getAction(), true);
// TODO: are undo calls interceptable?
// Maintaining support for client action handlers
// Client action handlers were being processed even in an undo
DispatchRequest dispatchRequest = findClientActionHandlerRequest();
if (dispatchRequest == null) {
return processCall();
} else {
return dispatchRequest;
}
}
@Override
protected DispatchRequest processCall() {
return new GwtHttpDispatchRequest(dispatchService.undo(getSecurityCookie(), getAction(), result,
new AsyncCallback<Void>() {
public void onFailure(Throwable caught) {
RpcDispatchUndoCall.this.onExecuteFailure(caught);
dispatchHooks.onFailure(getAction(), caught, true);
}
public void onSuccess(Void nothing) {
RpcDispatchUndoCall.this.onExecuteSuccess(result);
dispatchHooks.onSuccess(getAction(), result, true);
}
}
));
}
@Deprecated
private DispatchRequest findClientActionHandlerRequest() {
DispatchRequest request = null;
A action = getAction();
IndirectProvider<ClientActionHandler<?, ?>> clientActionHandlerProvider =
clientActionHandlerRegistry.find(action.getClass());
if (clientActionHandlerProvider != null) {
DelegatingDispatchRequest dispatchRequest = new DelegatingDispatchRequest();
OldDelegatingAsyncCallback<A, R> delegatingCallback =
new OldDelegatingAsyncCallback<A, R>(this, action, getCallback(), dispatchRequest);
clientActionHandlerProvider.get(delegatingCallback);
request = dispatchRequest;
}
return request;
}
}