org.rhq.enterprise.gui.common.servlet

Class VerticalChartServlet

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

All Implemented Interfaces:

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

Direct Known Subclasses:

CurrentHealthChartServlet, MetricChartServlet

public abstract class VerticalChartServlet
extends ChartServlet

Abstract base class for vertical charts.

The chart servlet takes the following parameters (any applicable defaults are in bold and required parameters are in italics):

key	value
collectionType	<integer (0)>*

* Must be a valid value from {@link org.rhq.enterprise.server.legacy.measurement.MeasurementConstants.

See Also:

MeasurementConstants, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	COLLECTION_TYPE_PARAM Request parameter for unit scale.

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

Constructors

Constructor and Description
VerticalChartServlet()

Method Summary

Methods

Modifier and Type	Method and Description
protected int	getDefaultCollectionType() Return the default collectionType.
protected int	getTrendForCollectionType(int collectionType) Get the trend based on the collection type.
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.

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

createChart, createImage, getDefaultImageHeight, getDefaultImageWidth, getDefaultShowAverage, getDefaultShowBaseline, getDefaultShowHighRange, getDefaultShowLow, getDefaultShowLowRange, getDefaultShowPeak, getDefaultShowValues, getShowAvg, getShowLow, getShowPeak, plotData, 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

COLLECTION_TYPE_PARAM

public static final String COLLECTION_TYPE_PARAM

Request parameter for unit scale.

See Also:

Constant Field Values

Constructor Detail

VerticalChartServlet

public VerticalChartServlet()

Method Detail

getDefaultCollectionType

protected int getDefaultCollectionType()

Return the default collectionType.

parseParameters

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

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

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

getTrendForCollectionType

protected int getTrendForCollectionType(int collectionType)

Get the trend based on the collection type. If the collection type is invalid, it will return TREND_NONE.

Parameters:

collectionType - the collection type from MeasurementConstants

Returns:

the trend from net.covalent.chart.Trend

See Also:

MeasurementConstants, net.covalent.chart.Trend