/*
* 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.legacy.action.resource.common.monitor.visibility;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.tiles.ComponentContext;
import org.apache.struts.tiles.actions.TilesAction;
import org.rhq.core.clientapi.util.units.UnitNumber;
import org.rhq.core.clientapi.util.units.UnitsConstants;
import org.rhq.core.clientapi.util.units.UnitsFormat;
import org.rhq.core.domain.measurement.AvailabilityType;
import org.rhq.enterprise.gui.legacy.AttrConstants;
import org.rhq.enterprise.gui.legacy.DefaultConstants;
import org.rhq.enterprise.gui.legacy.WebUser;
import org.rhq.enterprise.gui.legacy.util.RequestUtils;
import org.rhq.enterprise.gui.legacy.util.SessionUtils;
import org.rhq.enterprise.server.legacy.measurement.MeasurementConstants;
import org.rhq.enterprise.server.measurement.AvailabilityManagerLocal;
import org.rhq.enterprise.server.measurement.AvailabilityPoint;
import org.rhq.enterprise.server.measurement.MeasurementPreferences;
import org.rhq.enterprise.server.measurement.MeasurementPreferences.MetricRangePreferences;
import org.rhq.enterprise.server.util.LookupUtil;
/**
* An <code>TilesAction</code> that retrieves metric data to facilitate display of the availability bar. This code was
* moved from org.rhq.enterprise.gui.legacy.action.resource.common.monitor.visibility.CurrentHealthAction
*/
public class AvailabilityAction extends TilesAction {
protected final Log log = LogFactory.getLog(AvailabilityAction.class);
@Override
public ActionForward execute(ComponentContext context, ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
// Get the resource availability
AvailabilityManagerLocal availabilityManager = LookupUtil.getAvailabilityManager();
WebUser user = SessionUtils.getWebUser(request.getSession());
MeasurementPreferences preferences = user.getMeasurementPreferences();
int resourceId = RequestUtils.getResourceId(request);
try {
MetricRangePreferences rangePreferences = preferences.getMetricRangePreferences();
List<AvailabilityPoint> data = availabilityManager.findAvailabilitiesForResource(user.getSubject(),
resourceId, rangePreferences.begin, rangePreferences.end, DefaultConstants.DEFAULT_CHART_POINTS,
!rangePreferences.readOnly);
request.setAttribute(AttrConstants.AVAILABILITY_METRICS_ATTR, data);
request.setAttribute(AttrConstants.AVAIL_METRICS_ATTR, getFormattedAvailability(data));
} catch (Exception e) {
// No utilization metric
log.debug(MeasurementConstants.CAT_AVAILABILITY + " not found for " + resourceId);
}
return null;
}
protected String getFormattedAvailability(List<AvailabilityPoint> values) {
double sum = 0;
int count = 0;
for (AvailabilityPoint ap : values) {
if (ap.isKnown()) {
count++;
if (ap.getAvailabilityType() == AvailabilityType.UP) {
sum++;
}
}
}
// by the logic above, if sum is zero then count is also zero
// so, shortcut the result as 0 if this is the case, otherwise result sum / count
double result = ((sum == 0) ? 0 : (sum / count));
UnitNumber average = new UnitNumber(result, UnitsConstants.UNIT_PERCENTAGE);
return UnitsFormat.format(average).toString();
}
}