Java tutorial
/* * RHQ Management Platform * Copyright (C) 2005-2008 Red Hat, Inc. * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation version 2 of the License. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ package org.rhq.enterprise.gui.event; import java.util.Arrays; import javax.faces.application.FacesMessage; import javax.faces.context.FacesContext; import javax.faces.model.DataModel; import javax.faces.model.SelectItem; import javax.servlet.http.HttpServletRequest; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.rhq.core.domain.common.EntityContext; import org.rhq.core.domain.event.EventSeverity; import org.rhq.core.domain.event.composite.EventComposite; import org.rhq.core.domain.util.PageControl; import org.rhq.core.domain.util.PageList; import org.rhq.core.gui.util.FacesContextUtility; import org.rhq.core.gui.util.StringUtility; import org.rhq.enterprise.gui.common.converter.SelectItemUtils; import org.rhq.enterprise.gui.common.framework.PagedDataTableUIBean; import org.rhq.enterprise.gui.common.paging.PageControlView; import org.rhq.enterprise.gui.common.paging.PagedListDataModel; import org.rhq.enterprise.gui.legacy.WebUser; import org.rhq.enterprise.gui.util.EnterpriseFacesContextUtility; import org.rhq.enterprise.gui.util.WebUtility; import org.rhq.enterprise.server.event.EventException; import org.rhq.enterprise.server.event.EventManagerLocal; import org.rhq.enterprise.server.measurement.MeasurementPreferences; import org.rhq.enterprise.server.measurement.MeasurementPreferences.MetricRangePreferences; import org.rhq.enterprise.server.util.LookupUtil; public class EventHistoryUIBean extends PagedDataTableUIBean { private final Log log = LogFactory.getLog(this.getClass()); private EventManagerLocal eventManager = LookupUtil.getEventManager(); public static final String MANAGED_BEAN_NAME = "EventHistoryUIBean"; private EntityContext context; private String[] severityFilter; private String sourceFilter; private String searchFilter; private SelectItem[] severityFilterSelectItems; private EventComposite selectedEvent; private Integer eventId; public EventHistoryUIBean() { context = WebUtility.getEntityContext(); SelectItem[] defaultSelectedItems = getSeverityFilterSelectItems(); severityFilter = new String[defaultSelectedItems.length]; for (int i = 0; i < severityFilter.length; i++) { severityFilter[i] = (String) defaultSelectedItems[i].getValue(); } } public EntityContext getContext() { return this.context; } public String[] getSeverityFilter() { if (severityFilter == null || severityFilter.length == 0) { FacesContext facesContext = FacesContextUtility.getFacesContext(); HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest(); severityFilter = request.getParameterValues("eventHistoryForm:severityFilter"); } // do not need to SelectItemUtils.cleanse the value because "ALL" is not rendered in the options list anymore return severityFilter; } public void setSeverityFilter(String[] severityFilter) { this.severityFilter = severityFilter; } public SelectItem[] getSeverityFilterSelectItems() { if (severityFilterSelectItems == null) { severityFilterSelectItems = SelectItemUtils.convertFromEnum(EventSeverity.class, false); } return severityFilterSelectItems; } public void setSeverityFilterSelectItems(SelectItem[] sevFilterSelectItems) { this.severityFilterSelectItems = sevFilterSelectItems; } public String getSourceFilter() { if (sourceFilter == null) { sourceFilter = FacesContextUtility.getOptionalRequestParameter("eventHistoryForm:sourceFilter"); } return sourceFilter; } public void setSourceFilter(String sourceFilter) { this.sourceFilter = sourceFilter; } public String getSearchFilter() { if (searchFilter == null) { searchFilter = FacesContextUtility.getOptionalRequestParameter("eventHistoryForm:searchFilter"); } return searchFilter; } public void setSearchFilter(String searchFilter) { this.searchFilter = searchFilter; } public void populateEventId(Integer eventId) { this.eventId = eventId; this.selectedEvent = null; } public EventComposite getSelectedEvent() { if (selectedEvent == null) { if (eventId != null) { try { selectedEvent = eventManager.getEventDetailForEventId(getSubject(), eventId); } catch (EventException ee) { selectedEvent = null; // keep it null, handle at the UI layer } } } return selectedEvent; } public String deleteSelectedEvents() { String[] selectedEvents = getSelectedEvents(); Integer[] eventIds = StringUtility.getIntegerArray(selectedEvents); try { int numDeleted = eventManager.deleteEventsForContext(getSubject(), context, Arrays.asList(eventIds)); FacesContextUtility.addMessage(FacesMessage.SEVERITY_INFO, "Deleted " + numDeleted + " events."); } catch (Exception e) { FacesContextUtility.addMessage(FacesMessage.SEVERITY_ERROR, "Failed to delete selected events.", e); } return "success"; } public String purgeAllEvents() { try { int numDeleted = eventManager.purgeEventsForContext(getSubject(), context); FacesContextUtility.addMessage(FacesMessage.SEVERITY_INFO, "Deleted " + numDeleted + " events"); } catch (Exception e) { FacesContextUtility.addMessage(FacesMessage.SEVERITY_ERROR, "Failed to delete events", e); log.error("Failed to delete events for " + context, e); } return "success"; } @Override public DataModel getDataModel() { if (dataModel == null) { dataModel = new ListEventsHistoryDataModel(PageControlView.EventsHistoryList, MANAGED_BEAN_NAME); } return dataModel; } private class ListEventsHistoryDataModel extends PagedListDataModel<EventComposite> { public ListEventsHistoryDataModel(PageControlView view, String beanName) { super(view, beanName); } @Override public PageList<EventComposite> fetchPage(PageControl pc) { WebUser user = EnterpriseFacesContextUtility.getWebUser(); MeasurementPreferences preferences = user.getMeasurementPreferences(); MetricRangePreferences rangePreferences = preferences.getMetricRangePreferences(); EventSeverity[] severities = getEventSeverity(); String search = getSearchFilter(); String source = getSourceFilter(); PageList<EventComposite> results = new PageList<EventComposite>(); if (severities == null || (severities != null && severities.length == 0)) { // RHQ-1913, nothing was selected so no results should display, short-cut logic return results; } results = eventManager.findEventComposites(getSubject(), context, rangePreferences.begin, rangePreferences.end, severities, source, search, pc); return results; } } private String[] getSelectedEvents() { return FacesContextUtility.getRequest().getParameterValues("selectedEvents"); } private EventSeverity[] getEventSeverity() { String[] severityNames = getSeverityFilter(); if (severityNames != null) { EventSeverity[] severities = new EventSeverity[severityNames.length]; for (int i = 0; i < severityNames.length; i++) { severities[i] = Enum.valueOf(EventSeverity.class, severityNames[i]); } return severities; } return null; } }