/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* 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 org.uberfire.client.mvp;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import org.slf4j.Logger;
import org.uberfire.client.mvp.ActivityLifecycleError.LifecyclePhase;
import org.uberfire.client.workbench.widgets.notifications.NotificationManager;
import org.uberfire.workbench.events.NotificationEvent;
import org.uberfire.workbench.events.NotificationEvent.NotificationType;
import static org.uberfire.debug.Debug.shortName;
@ApplicationScoped
public class ActivityLifecycleErrorHandler {
@Inject
private Logger logger;
@Inject
private Event<ActivityLifecycleError> lifecycleErrorEvent;
@Inject
private NotificationManager notificationManager;
/**
* Becomes true when the error handling procedure is happening; reverts back to false when error handling is
* complete. This is used to prevent multiple cascading failures when shutting down a broken activity.
*/
private boolean errorHandlingInProgress;
/**
* Handles the failure of an activity's lifecycle method. This should only normally be called by the
* {@link ActivityManager} or {@link PlaceManager} implementation.
* @param failedActivity the activity instance that was in error. Not null.
* @param failedCall The lifecycle call that was in error. Not null.
* @param exception The exception thrown by the lifecycle method, if the error was caused by an exception. Can be null.
*/
public void handle(Activity failedActivity,
LifecyclePhase failedCall,
Throwable exception) {
if (errorHandlingInProgress) {
return;
}
try {
errorHandlingInProgress = true;
ActivityLifecycleError event = new ActivityLifecycleError(failedActivity,
failedCall,
exception);
try {
lifecycleErrorEvent.fire(event);
} catch (Exception ex) {
logger.warn("A lifecycle error observer threw an exception",
ex);
}
if (!event.isErrorMessageSuppressed()) {
StringBuilder message = new StringBuilder();
message.append(shortName(failedActivity.getClass()) + " failed in ").append(failedCall);
if (exception != null) {
message.append(": ").append(exception.toString());
}
notificationManager.addNotification(new NotificationEvent(message.toString(),
NotificationType.ERROR));
}
} finally {
errorHandlingInProgress = false;
}
}
}