Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 de.unioninvestment.eai.portal.portlet.crud; import org.codehaus.groovy.runtime.StackTraceUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.vaadin.server.DefaultErrorHandler; import com.vaadin.server.ErrorEvent; import com.vaadin.server.Page; import com.vaadin.ui.Notification; public class CrudErrorHandler extends DefaultErrorHandler { private static final long serialVersionUID = 1L; private static final Logger LOGGER = LoggerFactory.getLogger(CrudErrorHandler.class); @Override public void error(ErrorEvent event) { Throwable throwable = event.getThrowable(); LOGGER.error("Internal error", StackTraceUtils.deepSanitize(throwable)); if (Page.getCurrent() != null) { displayRootCauseAsErrorNotification(throwable); } } private void displayRootCauseAsErrorNotification(Throwable throwable) { Throwable rootCause = StackTraceUtils.extractRootCause(throwable); String message = rootCause.getMessage(); if (message != null) { Notification.show(message, Notification.Type.ERROR_MESSAGE); } else { Notification.show(rootCause.getClass().getSimpleName(), Notification.Type.ERROR_MESSAGE); } } }