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.ResourceType; 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.Button.ClickEvent; import com.vaadin.ui.Notification; import com.vaadin.ui.Panel; import com.vaadin.ui.VerticalLayout; /** * The Class GroupPanel. * * @author <a href="mailto:agalue@opennms.org">Alejandro Galue</a> */ @SuppressWarnings("serial") public class GroupPanel extends Panel { /** The isNew flag. True, if the group is new. */ private boolean isNew = false; /** The group table. */ private final GroupTable groupTable; /** The selected group ID. */ private Object selectedGroupId; /** * Instantiates a new group panel. * * @param dataCollectionConfigDao the OpenNMS Data Collection Configuration DAO * @param source the OpenNMS Data Collection Group object * @param logger the logger object * @param mibGroupEditable true, if the MIB group can be modified */ public GroupPanel(final DataCollectionConfigDao dataCollectionConfigDao, final DatacollectionGroup source, final Logger logger, boolean mibGroupEditable) { if (dataCollectionConfigDao == null) { throw new RuntimeException("dataCollectionConfigDao cannot be null."); } if (source == null) { throw new RuntimeException("source cannot be null."); } addStyleName("light"); // Adding all resource types already defined on this source final List<String> resourceTypes = new ArrayList<String>(); for (ResourceType type : source.getResourceTypes()) { resourceTypes.add(type.getName()); } // Adding all defined resource types resourceTypes.addAll(dataCollectionConfigDao.getConfiguredResourceTypes().keySet()); groupTable = new GroupTable(source.getGroups()); final GroupForm groupForm = new GroupForm(resourceTypes, mibGroupEditable); groupForm.setVisible(false); final EditorToolbar bottomToolbar = new EditorToolbar() { @Override public boolean save() { Group group = groupForm.getGroup(); if (!isNew && !group.getName().equals(groupForm.getGroupName())) { Set<String> systemDefMap = getParentSystemDefs(dataCollectionConfigDao, group.getName()); if (!systemDefMap.isEmpty()) { final String msg = "The group cannot be renamed because it is being referenced by:\n" + systemDefMap.toString(); Notification.show(msg, Notification.Type.WARNING_MESSAGE); return false; } } logger.info("SNMP Group " + group.getName() + " has been " + (isNew ? "created." : "updated.")); try { groupForm.commit(); groupForm.setReadOnly(true); groupTable.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 groupId = groupTable.getValue(); if (groupId != null) { Group group = groupTable.getGroup(groupId); Set<String> systemDefMap = getParentSystemDefs(dataCollectionConfigDao, group.getName()); if (!systemDefMap.isEmpty()) { final String msg = "The group cannot be deleted because it is being referenced by:\n" + systemDefMap.toString(); Notification.show(msg, Notification.Type.WARNING_MESSAGE); return false; } logger.info("SNMP Group " + group.getName() + " has been removed."); groupTable.select(null); groupTable.removeItem(groupId); groupTable.refreshRowCache(); } return true; } @Override public boolean edit() { groupForm.setReadOnly(false); return true; } @Override public boolean cancel() { groupForm.discard(); groupForm.setReadOnly(true); return true; } }; bottomToolbar.setVisible(false); groupTable.addValueChangeListener(new Property.ValueChangeListener() { @Override public void valueChange(ValueChangeEvent event) { if (groupForm.isVisible() && !groupForm.isReadOnly()) { groupTable.select(selectedGroupId); Notification.show( "A group seems to be being edited.\nPlease save or cancel your current changes.", Notification.Type.WARNING_MESSAGE); } else { Object groupId = groupTable.getValue(); if (groupId != null) { selectedGroupId = groupId; groupForm.setGroup(groupTable.getGroup(groupId)); } groupForm.setReadOnly(true); groupForm.setVisible(groupId != null); bottomToolbar.setReadOnly(true); bottomToolbar.setVisible(groupId != null); } } }); final Button add = new Button("Add SNMP Group", new Button.ClickListener() { @Override public void buttonClick(ClickEvent event) { groupTable.addGroup(groupForm.createBasicGroup()); groupForm.setReadOnly(false); bottomToolbar.setReadOnly(false); setIsNew(true); } }); final VerticalLayout mainLayout = new VerticalLayout(); mainLayout.setSpacing(true); mainLayout.setMargin(true); mainLayout.addComponent(groupTable); mainLayout.addComponent(add); mainLayout.addComponent(groupForm); mainLayout.addComponent(bottomToolbar); mainLayout.setComponentAlignment(add, Alignment.MIDDLE_RIGHT); setContent(mainLayout); } /** * Sets the value of the ifNew flag. * * @param isNew true, if the group is new. */ public void setIsNew(boolean isNew) { this.isNew = isNew; } /** * Gets the groups. * * @return the groups */ public List<Group> getGroups() { return groupTable.getGroups(); } /** * Gets the parent system definitions. * <p>The list of systemDef per SNMP collection that are referencing a given groupName</p> * * @param dataCollectionConfigDao the data collection configuration DAO * @param groupName the group name * @return the parent system definitions. */ private Set<String> getParentSystemDefs(final DataCollectionConfigDao dataCollectionConfigDao, String groupName) { Set<String> systemDefMap = new TreeSet<String>(); for (final SnmpCollection collection : dataCollectionConfigDao.getRootDataCollection() .getSnmpCollections()) { for (final SystemDef systemDef : collection.getSystems().getSystemDefs()) { for (final String group : systemDef.getCollect().getIncludeGroups()) { if (group.equals(groupName)) { systemDefMap.add(systemDef.getName() + '@' + collection.getName()); } } } } return systemDefMap; } }