/*
* RHQ Management Platform
* Copyright (C) 2011 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.coregui.client.util.async;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* @author Ian Springer
*/
public abstract class AbstractCompoundAsyncOperation implements AsyncOperation,
AsyncOperationCallback {
private List<AsyncOperation> operations = new ArrayList<AsyncOperation>();
private Map<AsyncOperation, Object[]> params = new LinkedHashMap<AsyncOperation, Object[]>();
private AsyncOperationCallback<Map<AsyncOperation, Object>> callback;
private Map<AsyncOperation, Object> successResults = new LinkedHashMap<AsyncOperation, Object>();
private Map<AsyncOperation, Throwable> failureThrowables = new LinkedHashMap<AsyncOperation, Throwable>();
public void addOperation(AsyncOperation operation) {
if (this.callback != null) {
throw new IllegalStateException("Child operations cannot be added once the compound operation has been executed.");
}
this.operations.add(operation);
}
@Override
public void execute(AsyncOperationCallback callback, Object... params) {
if (this.callback != null) {
throw new IllegalStateException("This executor can only be executed once and has already been executed.");
}
this.callback = callback;
List<AsyncOperation> operations1 = this.operations;
for (int i = 0, operations1Size = operations1.size(); i < operations1Size; i++) {
AsyncOperation operation = operations1.get(i);
Object[] paramArray;
if (i < this.params.size()) {
Object param = params[i];
paramArray = (param.getClass().isArray()) ? (Object[]) param : new Object[] { param };
} else {
// no params
paramArray = new Object[0];
}
this.params.put(operation, paramArray);
}
}
@Override
public void onFailure(AsyncOperation operation, Throwable caught) {
//noinspection ThrowableResultOfMethodCallIgnored
this.failureThrowables.put(operation, caught);
processCompletedOperation();
}
@Override
public void onSuccess(AsyncOperation operation, Object result) {
this.successResults.put(operation, result);
processCompletedOperation();
}
public List<AsyncOperation> getOperations() {
return operations;
}
public AsyncOperationCallback<Map<AsyncOperation, Object>> getCallback() {
return callback;
}
public Map<AsyncOperation, Object> getSuccessResults() {
return successResults;
}
public Map<AsyncOperation, Throwable> getFailureThrowables() {
return failureThrowables;
}
public Object[] getParameters(AsyncOperation operation) {
return this.params.get(operation);
}
protected boolean isComplete() {
int completedOperationsCount = this.successResults.size() + this.failureThrowables.size();
return (completedOperationsCount == this.operations.size());
}
protected boolean processCompletedOperation() {
if (isComplete()) {
if (this.failureThrowables.isEmpty()) {
this.callback.onSuccess(this, this.successResults);
} else {
CompoundAsyncOperationException exception = new CompoundAsyncOperationException(this.successResults,
this.failureThrowables);
this.callback.onFailure(this, exception);
}
return true;
} else {
return false;
}
}
}