Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2012-2014 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2014 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.features.vaadin.config; import java.io.File; import java.io.FileWriter; import java.util.Iterator; import org.opennms.core.utils.ConfigFileConstants; import org.opennms.core.xml.JaxbUtils; import org.opennms.features.vaadin.datacollection.DataCollectionGroupPanel; import org.opennms.netmgt.config.api.DataCollectionConfigDao; import org.opennms.netmgt.config.datacollection.DatacollectionConfig; import org.opennms.netmgt.config.datacollection.DatacollectionGroup; import org.opennms.netmgt.config.datacollection.IncludeCollection; import org.opennms.netmgt.config.datacollection.SnmpCollection; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.vaadin.dialogs.ConfirmDialog; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.util.FilesystemContainer; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.ComboBox; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Notification; import com.vaadin.ui.VerticalLayout; /** * The Class Data Collection Group Administration Panel. */ // TODO When deleting a group, all the SNMP collections UI components must be updated. @SuppressWarnings("serial") public class DataCollectionGroupAdminPanel extends VerticalLayout { /** The Constant LOG. */ private static final Logger LOG = LoggerFactory.getLogger(DataCollectionGroupAdminPanel.class); /** The m_selected group. */ private String m_selectedGroup; /** * Instantiates a new data collection group administration panel. * * @param dataCollectionDao the OpenNMS data collection configuration DAO */ public DataCollectionGroupAdminPanel(final DataCollectionConfigDao dataCollectionDao) { setCaption("Data Collection Groups"); final HorizontalLayout toolbar = new HorizontalLayout(); toolbar.setMargin(true); final Label comboLabel = new Label("Select Data Collection Group File"); toolbar.addComponent(comboLabel); toolbar.setComponentAlignment(comboLabel, Alignment.MIDDLE_LEFT); final File datacollectionDir = new File(ConfigFileConstants.getFilePathString(), "datacollection"); final ComboBox dcGroupSource = new ComboBox(); toolbar.addComponent(dcGroupSource); dcGroupSource.setImmediate(true); dcGroupSource.setNullSelectionAllowed(false); dcGroupSource.setContainerDataSource(new XmlFileContainer(datacollectionDir, false)); dcGroupSource.setItemCaptionPropertyId(FilesystemContainer.PROPERTY_NAME); dcGroupSource.addValueChangeListener(new ComboBox.ValueChangeListener() { @Override public void valueChange(ValueChangeEvent event) { final File file = (File) event.getProperty().getValue(); if (file == null) return; try { LOG.info("Loading data collection data from {}", file); DatacollectionGroup dcGroup = JaxbUtils.unmarshal(DatacollectionGroup.class, file); m_selectedGroup = dcGroup.getName(); addDataCollectionGroupPanel(dataCollectionDao, file, dcGroup); } catch (Exception e) { LOG.error("an error ocurred while parsing the data collection configuration {}: {}", file, e.getMessage(), e); Notification.show("Can't parse file " + file + " because " + e.getMessage()); } } }); final Button add = new Button("Add New Data Collection File"); toolbar.addComponent(add); add.addClickListener(new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { PromptWindow w = new PromptWindow("New Data Collection Group", "Group Name") { @Override public void textFieldChanged(String fieldValue) { File file = new File(datacollectionDir, fieldValue.replaceAll(" ", "_") + ".xml"); LOG.info("Adding new data collection file {}", file); DatacollectionGroup dcGroup = new DatacollectionGroup(); dcGroup.setName(fieldValue); addDataCollectionGroupPanel(dataCollectionDao, file, dcGroup); } }; getUI().addWindow(w); } }); final Button remove = new Button("Remove Selected Data Collection File"); toolbar.addComponent(remove); remove.addClickListener(new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { if (dcGroupSource.getValue() == null) { Notification.show("Please select a data collection group configuration file."); return; } final File file = (File) dcGroupSource.getValue(); ConfirmDialog.show(getUI(), "Are you sure?", "Do you really want to remove the file " + file.getName() + "?\nThis cannot be undone and OpenNMS won't be able to collect the metrics defined on this file.", "Yes", "No", new ConfirmDialog.Listener() { public void onClose(ConfirmDialog dialog) { if (dialog.isConfirmed()) { LOG.info("deleting file {}", file); if (file.delete()) { try { // Updating datacollection-config.xml File configFile = ConfigFileConstants .getFile(ConfigFileConstants.DATA_COLLECTION_CONF_FILE_NAME); DatacollectionConfig config = JaxbUtils .unmarshal(DatacollectionConfig.class, configFile); boolean modified = false; for (SnmpCollection collection : config.getSnmpCollections()) { for (Iterator<IncludeCollection> it = collection .getIncludeCollections().iterator(); it.hasNext();) { IncludeCollection ic = it.next(); if (m_selectedGroup != null && m_selectedGroup .equals(ic.getDataCollectionGroup())) { it.remove(); modified = true; } } } if (modified) { LOG.info("updating data colleciton configuration on {}.", configFile); JaxbUtils.marshal(config, new FileWriter(configFile)); } // Updating UI Components dcGroupSource.select(null); removeDataCollectionGroupPanel(); } catch (Exception e) { LOG.error( "an error ocurred while saving the data collection configuration: {}", e.getMessage(), e); Notification.show( "Can't save data collection configuration. " + e.getMessage(), Notification.Type.ERROR_MESSAGE); } } else { Notification.show("Cannot delete file " + file, Notification.Type.WARNING_MESSAGE); } } } }); } }); addComponent(toolbar); addComponent(new Label("")); setComponentAlignment(toolbar, Alignment.MIDDLE_RIGHT); } /** * Adds a data collection group panel. * * @param dataCollectionDao the OpenNMS data collection configuration DAO * @param file data collection group file name * @param dcGroup the data collection group object */ private void addDataCollectionGroupPanel(final DataCollectionConfigDao dataCollectionDao, final File file, final DatacollectionGroup dcGroup) { DataCollectionGroupPanel panel = new DataCollectionGroupPanel(dataCollectionDao, dcGroup, new SimpleLogger(), file) { @Override public void cancel() { this.setVisible(false); } @Override public void success() { Notification.show("Data collection group file " + file.getName() + " has been successfuly saved."); this.setVisible(false); } @Override public void failure(String reason) { String msg = reason == null ? "." : ", because" + reason; Notification.show("Data collection group file " + file.getName() + " cannot be saved" + msg, Notification.Type.ERROR_MESSAGE); } }; panel.setCaption("Data Collection Group from " + file.getName()); removeDataCollectionGroupPanel(); addComponent(panel); } /** * Removes the data collection group panel. */ private void removeDataCollectionGroupPanel() { if (this.getComponentCount() > 1) this.removeComponent(this.getComponent(1)); } }