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.datacollection; import java.util.ArrayList; import java.util.List; import java.util.Set; import java.util.TreeSet; import org.opennms.features.vaadin.api.Logger; import org.opennms.features.vaadin.config.EditorToolbar; import org.opennms.netmgt.config.api.DataCollectionConfigDao; import org.opennms.netmgt.config.datacollection.DatacollectionGroup; import org.opennms.netmgt.config.datacollection.Group; import org.opennms.netmgt.config.datacollection.SnmpCollection; import org.opennms.netmgt.config.datacollection.SystemDef; import com.vaadin.data.Property; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.fieldgroup.FieldGroup.CommitException; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Notification; import com.vaadin.ui.Panel; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.Button.ClickEvent; /** * The Class System Definition Panel. * * @author <a href="mailto:agalue@opennms.org">Alejandro Galue</a> */ @SuppressWarnings("serial") public class SystemDefPanel extends Panel { /** The isNew flag. True, if the system definition is new. */ private boolean isNew = false; /** The system definition table. */ private final SystemDefTable systemDefTable; /** The selected systemDef ID. */ private Object selectedSystemDefId; /** * Instantiates a new system definition panel. * * @param dataCollectionConfigDao the OpenNMS Data Collection Configuration DAO * @param source the OpenNMS Data Collection SystemDef object * @param logger the logger object */ public SystemDefPanel(final DataCollectionConfigDao dataCollectionConfigDao, final DatacollectionGroup source, final Logger logger) { if (dataCollectionConfigDao == null) { throw new RuntimeException("dataCollectionConfigDao cannot be null."); } if (source == null) { throw new RuntimeException("source cannot be null."); } addStyleName("light"); // Adding all systemDefs already defined on this source final List<String> groupNames = new ArrayList<String>(); for (Group group : source.getGroups()) { groupNames.add(group.getName()); } // Adding all defined groups groupNames.addAll(dataCollectionConfigDao.getAvailableMibGroups()); systemDefTable = new SystemDefTable(source.getSystemDefs()); final SystemDefForm systemDefForm = new SystemDefForm(groupNames); systemDefForm.setVisible(false); final EditorToolbar bottomToolbar = new EditorToolbar() { @Override public boolean save() { SystemDef systemDef = systemDefForm.getSystemDef(); if (!isNew && !systemDef.getName().equals(systemDefForm.getSystemDefName())) { Set<String> collections = getParentCollections(dataCollectionConfigDao, systemDef.getName()); if (!collections.isEmpty()) { final String msg = "The systemDef cannot be renamed because it is being referenced by:\n" + collections.toString(); Notification.show(msg, Notification.Type.WARNING_MESSAGE); return false; } } logger.info( "SNMP SystemDef " + systemDef.getName() + " has been " + (isNew ? "created." : "updated.")); try { systemDefForm.commit(); systemDefForm.setReadOnly(true); systemDefTable.refreshRowCache(); return true; } catch (CommitException e) { String msg = "Can't save the changes: " + e.getMessage(); logger.error(msg); Notification.show(msg, Notification.Type.ERROR_MESSAGE); return false; } } @Override public boolean delete() { Object systemDefId = systemDefTable.getValue(); if (systemDefId != null) { SystemDef systemDef = systemDefTable.getSystemDef(systemDefId); Set<String> collections = getParentCollections(dataCollectionConfigDao, systemDef.getName()); if (!collections.isEmpty()) { final String msg = "The systemDef cannot be deleted because it is being referenced by:\n" + collections.toString(); Notification.show(msg, Notification.Type.WARNING_MESSAGE); return false; } logger.info("SNMP SystemDef " + systemDef.getName() + " has been removed."); systemDefTable.select(null); systemDefTable.removeItem(systemDefId); systemDefTable.refreshRowCache(); } return true; } @Override public boolean edit() { systemDefForm.setReadOnly(false); return true; } @Override public boolean cancel() { systemDefForm.discard(); systemDefForm.setReadOnly(true); return true; } }; bottomToolbar.setVisible(false); systemDefTable.addValueChangeListener(new Property.ValueChangeListener() { @Override public void valueChange(ValueChangeEvent event) { if (systemDefForm.isVisible() && !systemDefForm.isReadOnly()) { systemDefTable.select(selectedSystemDefId); Notification.show( "A system definition seems to be being edited.\nPlease save or cancel your current changes.", Notification.Type.WARNING_MESSAGE); } else { Object systemDefId = systemDefTable.getValue(); if (systemDefId != null) { selectedSystemDefId = systemDefId; systemDefForm.setSystemDef(systemDefTable.getSystemDef(systemDefId)); } systemDefForm.setReadOnly(true); systemDefForm.setVisible(systemDefId != null); bottomToolbar.setReadOnly(true); bottomToolbar.setVisible(systemDefId != null); } } }); final Button add = new Button("Add SNMP SystemDef", new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { systemDefTable.addSystemDef(systemDefForm.createBasicSystemDef()); systemDefForm.setReadOnly(false); bottomToolbar.setReadOnly(false); setIsNew(true); } }); final VerticalLayout mainLayout = new VerticalLayout(); mainLayout.setSpacing(true); mainLayout.setMargin(true); mainLayout.addComponent(systemDefTable); mainLayout.addComponent(add); mainLayout.addComponent(systemDefForm); mainLayout.addComponent(bottomToolbar); mainLayout.setComponentAlignment(add, Alignment.MIDDLE_RIGHT); setContent(mainLayout); } /** * Sets the value of the ifNew flag. * * @param isNew true, if the systemDef is new. */ public void setIsNew(boolean isNew) { this.isNew = isNew; } /** * Gets the systemDefs. * * @return the systemDefs */ public List<SystemDef> getSystemDefs() { return systemDefTable.getSystemDefs(); } /** * Gets the parent SNMP Collections. * <p>The list of SNMP collection that are referencing a given systemDefName</p> * * @param dataCollectionConfigDao the data collection configuration DAO * @param systemDefName the system definition name * @return the parent collections. */ private Set<String> getParentCollections(final DataCollectionConfigDao dataCollectionConfigDao, String systemDefName) { Set<String> collectionMap = new TreeSet<String>(); for (final SnmpCollection collection : dataCollectionConfigDao.getRootDataCollection() .getSnmpCollections()) { for (final SystemDef systemDef : collection.getSystems().getSystemDefs()) { if (systemDefName.equals(systemDef.getName())) { collectionMap.add(collection.getName()); } } } return collectionMap; } }