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

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.HighLowChartServlet

All Implemented Interfaces:

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

public class HighLowChartServlet
extends ChartServlet
implements javax.servlet.SingleThreadModel

Display a high-low chart. This groks three kinds of input:

• schedId: show the data for a single schedule denoted by schedid
• groupId + definitionId: show data for the passed definitionId and the given compatible group
• id + childTypeId + definitionId: show data for the passed definition of the autogroup id/resourceTypeId

Author:

Ian Springer, Heiko W. Rupp

See Also:

Serialized Form

Field Summary

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

BASELINE_PARAM, HIGHRANGE_PARAM, IMAGE_HEIGHT_DEFAULT, IMAGE_WIDTH_DEFAULT, 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

HighLowChartServlet()

Method Summary

protected Chart	createChart() Create and return the chart.
protected void	initializeChart(Chart chart) Initialize the chart.
protected void	parseParameters(javax.servlet.http.HttpServletRequest request) This method will be called automatically by the ChartServlet.
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.ChartServlet

createImage, getDefaultImageHeight, getDefaultImageWidth, 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

Constructor Detail

HighLowChartServlet

public HighLowChartServlet()

Method Detail

createChart

protected Chart createChart()

Description copied from class: ChartServlet

Create and return the chart. This method will be called after the parameters have been parsed.

Specified by:

createChart in class ChartServlet

Returns:

the newly created chart

initializeChart

protected void initializeChart(Chart chart)

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

Overrides:

initializeChart in class ChartServlet

Parameters:

chart - the chart

parseParameters

protected void parseParameters(javax.servlet.http.HttpServletRequest request)

Description copied from class: ChartServlet

This method will be called automatically by the ChartServlet. It should handle the parsing and error-checking of any specific parameters for the chart being rendered.

Overrides:

parseParameters in class ChartServlet

Parameters:

request - the HTTP request object

plotData

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

Description copied from class: ChartServlet

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