com.gwtplatform.dispatch.client.AbstractDispatchAsync Maven / Gradle / Ivy
/**
* Copyright 2011 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.common.client.IndirectProvider;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandler;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandlerMismatchException;
import com.gwtplatform.dispatch.client.actionhandler.ClientActionHandlerRegistry;
import com.gwtplatform.dispatch.client.actionhandler.ExecuteCommand;
import com.gwtplatform.dispatch.client.actionhandler.UndoCommand;
import com.gwtplatform.dispatch.shared.Action;
import com.gwtplatform.dispatch.shared.DispatchAsync;
import com.gwtplatform.dispatch.shared.DispatchRequest;
import com.gwtplatform.dispatch.shared.Result;
import com.gwtplatform.dispatch.shared.SecurityCookieAccessor;
public abstract class AbstractDispatchAsync implements DispatchAsync {
private final ClientActionHandlerRegistry clientActionHandlerRegistry;
private final ExceptionHandler exceptionHandler;
private final SecurityCookieAccessor securityCookieAccessor;
public AbstractDispatchAsync(ExceptionHandler exceptionHandler,
SecurityCookieAccessor securityCookieAccessor,
ClientActionHandlerRegistry clientActionHandlerRegistry) {
this.exceptionHandler = exceptionHandler;
this.clientActionHandlerRegistry = clientActionHandlerRegistry;
this.securityCookieAccessor = securityCookieAccessor;
}
@Override
public , R extends Result> DispatchRequest execute(final A action,
final AsyncCallback callback) {
prepareExecute(action);
final String securityCookie = securityCookieAccessor.getCookieContent();
final IndirectProvider> clientActionHandlerProvider =
clientActionHandlerRegistry.find(action.getClass());
if (clientActionHandlerProvider != null) {
final DelegatingDispatchRequest dispatchRequest = new DelegatingDispatchRequest();
clientActionHandlerProvider.get(new AsyncCallback>() {
@Override
public void onSuccess(ClientActionHandler clientActionHandler) {
if (clientActionHandler.getActionType() != action.getClass()) {
dispatchRequest.cancel();
callback.onFailure(new ClientActionHandlerMismatchException(
(Class>) action.getClass(), clientActionHandler.getActionType()));
return;
}
if (dispatchRequest.isPending()) {
dispatchRequest.setDelegate(((ClientActionHandler) clientActionHandler).execute(
action, callback, new ExecuteCommand() {
@Override
public DispatchRequest execute(A action,
AsyncCallback resultCallback) {
if (dispatchRequest.isPending()) {
return doExecute(securityCookie, action, resultCallback);
} else {
return null;
}
}
}));
}
}
@Override
public void onFailure(Throwable caught) {
dispatchRequest.cancel();
callback.onFailure(caught);
}
});
return dispatchRequest;
} else {
return doExecute(securityCookie, action, callback);
}
}
@Override
public , R extends Result> DispatchRequest undo(final A action, final R result,
final AsyncCallback callback) {
final String securityCookie = securityCookieAccessor.getCookieContent();
final IndirectProvider> clientActionHandlerProvider = clientActionHandlerRegistry
.find(action.getClass());
if (clientActionHandlerProvider != null) {
final DelegatingDispatchRequest dispatchRequest = new DelegatingDispatchRequest();
clientActionHandlerProvider.get(new AsyncCallback>() {
@Override
public void onSuccess(ClientActionHandler clientActionHandler) {
if (clientActionHandler.getActionType() != action.getClass()) {
dispatchRequest.cancel();
callback.onFailure(new ClientActionHandlerMismatchException(
(Class>) action.getClass(), clientActionHandler.getActionType()));
return;
}
if (dispatchRequest.isPending()) {
dispatchRequest.setDelegate(((ClientActionHandler) clientActionHandler).undo(
action, result, callback, new UndoCommand() {
@Override
public DispatchRequest undo(A action, R result,
AsyncCallback callback) {
if (dispatchRequest.isPending()) {
return doUndo(securityCookie, action, result, callback);
} else {
return null;
}
}
}));
}
}
@Override
public void onFailure(Throwable caught) {
dispatchRequest.cancel();
callback.onFailure(caught);
}
});
return dispatchRequest;
} else {
return doUndo(securityCookie, action, result, callback);
}
}
protected abstract , R extends Result> DispatchRequest doExecute(String securityCookie,
final A action, final AsyncCallback callback);
protected abstract , R extends Result> DispatchRequest doUndo(String securityCookie,
final A action, R result, final AsyncCallback callback);
protected ClientActionHandlerRegistry getClientActionHandlerRegistry() {
return clientActionHandlerRegistry;
}
protected ExceptionHandler getExceptionHandler() {
return exceptionHandler;
}
protected SecurityCookieAccessor getSecurityCookieAccessor() {
return securityCookieAccessor;
}
protected , R extends Result> void onExecuteFailure(A action, Throwable caught,
final AsyncCallback callback) {
if (getExceptionHandler() != null
&& getExceptionHandler().onFailure(caught) == ExceptionHandler.Status.STOP) {
return;
}
callback.onFailure(caught);
}
protected , R extends Result> void onExecuteSuccess(A action, R result,
final AsyncCallback callback) {
callback.onSuccess(result);
}
protected , R extends Result> void onUndoFailure(A action, Throwable caught,
final AsyncCallback callback) {
if (getExceptionHandler() != null
&& getExceptionHandler().onFailure(caught) == ExceptionHandler.Status.STOP) {
return;
}
callback.onFailure(caught);
}
protected , R extends Result> void onUndoSuccess(A action, Void voidResult,
final AsyncCallback callback) {
callback.onSuccess(voidResult);
}
protected , R extends Result> void prepareExecute(final A action) {
}
protected , R extends Result> void prepareUndo(final A action) {
}
}