com.gwtplatform.dispatch.server.actionhandler.BatchActionHandler 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.server.actionhandler;
import java.util.List;
import com.gwtplatform.dispatch.server.ExecutionContext;
import com.gwtplatform.dispatch.shared.Action;
import com.gwtplatform.dispatch.shared.ActionException;
import com.gwtplatform.dispatch.shared.BatchAction;
import com.gwtplatform.dispatch.shared.BatchAction.OnException;
import com.gwtplatform.dispatch.shared.BatchResult;
import com.gwtplatform.dispatch.shared.Result;
/**
* This handles {@link BatchAction} requests, which are a set of multiple
* actions that need to all be executed successfully in sequence for the whole
* action to succeed.
*
* @author David Peterson
*/
public class BatchActionHandler extends
AbstractActionHandler {
public BatchActionHandler() {
super(BatchAction.class);
}
public BatchResult execute(BatchAction action, ExecutionContext context)
throws ActionException {
OnException onException = action.getOnException();
List results = new java.util.ArrayList();
for (Action a : action.getActions()) {
Result result = null;
try {
result = context.execute(a);
} catch (Exception e) {
if (onException == OnException.ROLLBACK) {
if (e instanceof ActionException) {
throw (ActionException) e;
}
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
} else {
throw new ActionException(e);
}
}
}
results.add(result);
}
return new BatchResult(results);
}
public void undo(BatchAction action, BatchResult result,
ExecutionContext context) throws ActionException {
// No action necessary - the sub actions should automatically rollback
}
}