org.rhq.enterprise.gui.common.servlet
Class CurrentHealthChartServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.rhq.enterprise.gui.common.servlet.ParameterizedServlet
              org.rhq.enterprise.gui.common.servlet.ImageServlet
                  org.rhq.enterprise.gui.common.servlet.ChartServlet
                      org.rhq.enterprise.gui.common.servlet.VerticalChartServlet
                          org.rhq.enterprise.gui.common.servlet.CurrentHealthChartServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

AvailHealthChartServlet, UsageHealthChartServlet

public abstract class CurrentHealthChartServlet
extends VerticalChartServlet

CurrentHealth chart servlet. The default imageWidth is 250 pixels. The default imageHeight is 130 pixels.

by default, this servlet will display an 8 column chart for the past 8 hours at 1 hour intervals based on the metric category returned by the getMetricCategory().

Additional parameters are as follows (any required parameters are in italics):

key	value
eid	<string or string[]>
ctype	<integer>

See Also:

Serialized Form

Field Summary

static int	IMAGE_HEIGHT_DEFAULT Default image height.
static int	IMAGE_WIDTH_DEFAULT Default image width.
protected static long	INTERVAL Interval for metrics.

Fields inherited from class org.rhq.enterprise.gui.common.servlet.VerticalChartServlet

COLLECTION_TYPE_PARAM

Fields inherited from class org.rhq.enterprise.gui.common.servlet.ChartServlet

BASELINE_PARAM, HIGHRANGE_PARAM, LOWRANGE_PARAM, MEASUREMENT_UNITS_PARAM, SHOW_AVERAGE_PARAM, SHOW_BASELINE_PARAM, SHOW_HIGHRANGE_PARAM, SHOW_LOW_PARAM, SHOW_LOWRANGE_PARAM, SHOW_PEAK_PARAM, SHOW_VALUES_PARAM, units

Fields inherited from class org.rhq.enterprise.gui.common.servlet.ImageServlet

IMAGE_FORMAT_JPEG, IMAGE_FORMAT_PARAM, IMAGE_FORMAT_PNG, IMAGE_HEIGHT_PARAM, IMAGE_WIDTH_PARAM

Constructor Summary

CurrentHealthChartServlet()

Method Summary

protected int	getDefaultImageHeight() Return the default imageHeight.
protected int	getDefaultImageWidth() Return the default imageWidth.
protected abstract String	getMetricCategory() Return the corresponding measurement category.
protected void	initializeChart(Chart chart) Initialize the chart.
protected void	plotData(javax.servlet.http.HttpServletRequest request, Chart chart) This method will be called automatically by the ChartServlet.

Methods inherited from class org.rhq.enterprise.gui.common.servlet.VerticalChartServlet

getDefaultCollectionType, getTrendForCollectionType, parseParameters

Methods inherited from class org.rhq.enterprise.gui.common.servlet.ChartServlet

createChart, createImage, getDefaultShowAverage, getDefaultShowBaseline, getDefaultShowHighRange, getDefaultShowLow, getDefaultShowLowRange, getDefaultShowPeak, getDefaultShowValues, getShowAvg, getShowLow, getShowPeak, renderJpegImage, renderPngImage

Methods inherited from class org.rhq.enterprise.gui.common.servlet.ImageServlet

doGet, getDefaultImageFormat, getImageFormat, getImageHeight, getImageWidth, init

Methods inherited from class org.rhq.enterprise.gui.common.servlet.ParameterizedServlet

invalidParamErr, invalidParamErr, invalidParamWarn, invalidParamWarn, invalidParamWarn, invalidParamWarn, invalidParamWarn, parseBooleanParameter, parseDoubleParameter, parseEnumParameter, parseIntParameter, parseLongParameter, parseRequiredBooleanParameter, parseRequiredDoubleParameter, parseRequiredIntParameter, parseRequiredLongParameter, parseRequiredStringParameter, parseRequiredStringParameter, parseStringParameter, parseStringParameter, requiredParamErr

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INTERVAL

protected static final long INTERVAL

Interval for metrics.

See Also:

Constant Field Values

IMAGE_WIDTH_DEFAULT

public static final int IMAGE_WIDTH_DEFAULT

Default image width.

See Also:

Constant Field Values

IMAGE_HEIGHT_DEFAULT

public static final int IMAGE_HEIGHT_DEFAULT

Default image height.

See Also:

Constant Field Values

Constructor Detail

CurrentHealthChartServlet

public CurrentHealthChartServlet()

Method Detail

getDefaultImageWidth

protected int getDefaultImageWidth()

Return the default imageWidth.

Overrides:

getDefaultImageWidth in class ChartServlet

getDefaultImageHeight

protected int getDefaultImageHeight()

Return the default imageHeight.

Overrides:

getDefaultImageHeight in class ChartServlet

getMetricCategory

protected abstract String getMetricCategory()

Return the corresponding measurement category.

Returns:

org.rhq.enterprise.server.legacy.measurement.MeasurementConstants.CAT_AVAILABILITY or org.rhq.enterprise.server.legacy.measurement.MeasurementConstants.CAT_THROUGHPUT or org.rhq.enterprise.server.legacy.measurement.MeasurementConstants.CAT_PERFORMANCE or org.rhq.enterprise.server.legacy.measurement.MeasurementConstants.CAT_UTILIZATION

initializeChart

protected void initializeChart(Chart chart)

Description copied from class: VerticalChartServlet

Initialize the chart. This method will be called after the parameters have been parsed and the chart has been created.

Overrides:

initializeChart in class VerticalChartServlet

Parameters:

chart - the chart

plotData

protected void plotData(javax.servlet.http.HttpServletRequest request,
                        Chart chart)
                 throws javax.servlet.ServletException

This method will be called automatically by the ChartServlet. It should handle adding data to the chart, setting up the X and Y axis labels, etc.

Specified by:

plotData in class ChartServlet

Parameters:

request - the HTTP request

Throws:

javax.servlet.ServletException