anon.infoservice
Class PerformanceEntry.PerformanceAttributeFloatingTimeEntry

java.lang.Object
  anon.infoservice.PerformanceEntry.PerformanceAttributeFloatingTimeEntry

All Implemented Interfaces:

IXMLEncodable

Enclosing class:

PerformanceEntry

private static class PerformanceEntry.PerformanceAttributeFloatingTimeEntry
extends java.lang.Object
implements IXMLEncodable

The floating time entry. This structure holds all attribute entries that are not older than a given time (usually 1 hour).

Author:

Christian Banse

Field Summary

static long	DEFAULT_TIMEFRAME The time frame of this floating time entry.
int	m_attribute The performance attribute.
private boolean	m_bInfoService True, if the object is created by the info service or the JAP client.
private int	m_iErrors
private long	m_iLastTimestamp
private int	m_iLastValue The last value that has been added.
private int	m_iResets
private int	m_iUnknown
long	m_lastUpdate The time of the last update.
private int	m_lBestBoundValue The best bound value.
private PerformanceEntry.Bound	m_lBoundValue The bound value.
private java.util.Hashtable	m_Values The values.
static java.lang.String	XML_ATTR_BEST The best bound value XML attribute name.
static java.lang.String	XML_ATTR_BOUND The bound value XML attribute name.
static java.lang.String	XML_ATTR_NOT_RECOVERED_BOUND
static java.lang.String	XML_ELEMENT_VALUE The XML element name.
static java.lang.String	XML_ELEMENT_VALUES The containers XML element name.

Fields inherited from interface anon.util.IXMLEncodable

FIELD_XML_ELEMENT_CONTAINER_NAME, FIELD_XML_ELEMENT_NAME, XML_ATTR_ID, XML_ATTR_LANGUAGE, XML_ATTR_VERSION

Constructor Summary

PerformanceEntry.PerformanceAttributeFloatingTimeEntry(int a_attribute, boolean a_bInfoService)
Constructs a new PerformanceAttributeFloatingTimeEntry.

PerformanceEntry.PerformanceAttributeFloatingTimeEntry(int a_attribute, org.w3c.dom.Node a_node)
Constructs a new PerformanceAttributeFloatingTimeEntry from XML data.

Method Summary

void	addValue(long a_lTimeStamp, int a_lValue) Adds a value to the floating time entry.
private int	calculateBound(java.util.Hashtable a_hashValues, java.util.Vector a_timestamps) Returns the bound value.
int	getAverage() Calculates and return the average value.
int	getBestBound() Returns the best bound value.
PerformanceEntry.Bound	getBound() Returns the bound value.
private int	getBoundFromValue(int value)
double	getStdDeviation() Calculates and returns the standard deviation.
void	setBestBound(int a_lValue) Sets the best bound value.
void	setBound(PerformanceEntry.Bound a_bound) Sets the bound value.
org.w3c.dom.Element	toXmlElement(org.w3c.dom.Document a_doc) Return an element that can be appended to the document.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_TIMEFRAME

public static final long DEFAULT_TIMEFRAME

The time frame of this floating time entry.

See Also:

Constant Field Values

XML_ELEMENT_VALUES

public static final java.lang.String XML_ELEMENT_VALUES

The containers XML element name.

See Also:

Constant Field Values

XML_ELEMENT_VALUE

public static final java.lang.String XML_ELEMENT_VALUE

The XML element name.

See Also:

Constant Field Values

XML_ATTR_BEST

public static final java.lang.String XML_ATTR_BEST

The best bound value XML attribute name.

See Also:

Constant Field Values

XML_ATTR_BOUND

public static final java.lang.String XML_ATTR_BOUND

The bound value XML attribute name.

See Also:

Constant Field Values

XML_ATTR_NOT_RECOVERED_BOUND

public static final java.lang.String XML_ATTR_NOT_RECOVERED_BOUND

See Also:

Constant Field Values

m_iLastValue

private int m_iLastValue

The last value that has been added. This is only useful for PACKETS.

m_iLastTimestamp

private long m_iLastTimestamp

m_attribute

public int m_attribute

The performance attribute.

m_lastUpdate

public long m_lastUpdate

The time of the last update.

m_Values

private java.util.Hashtable m_Values

The values.

m_lBoundValue

private PerformanceEntry.Bound m_lBoundValue

The bound value. This will only be set if this object is constructed from XML (only in the JAP client). The info service calculates the bound value on the fly using #getBound(boolean)

m_lBestBoundValue

private int m_lBestBoundValue

The best bound value. This will only be set if this object is constructed from XML (only in the JAP client). The info service calculates the best bound value on the fly using #getBound(boolean)

m_iResets

private int m_iResets

m_iErrors

private int m_iErrors

m_iUnknown

private int m_iUnknown

m_bInfoService

private boolean m_bInfoService

True, if the object is created by the info service or the JAP client. Determines whether the bound value is retrieved from the stored value or calculated on the fly.

Constructor Detail

PerformanceEntry.PerformanceAttributeFloatingTimeEntry

public PerformanceEntry.PerformanceAttributeFloatingTimeEntry(int a_attribute,
                                                              boolean a_bInfoService)

Constructs a new PerformanceAttributeFloatingTimeEntry.

Parameters:

a_attribute - The performance attribute.

a_bInfoService - Specifies if the caller of this method is an InfoService or the JAP client.

PerformanceEntry.PerformanceAttributeFloatingTimeEntry

public PerformanceEntry.PerformanceAttributeFloatingTimeEntry(int a_attribute,
                                                              org.w3c.dom.Node a_node)

Constructs a new PerformanceAttributeFloatingTimeEntry from XML data.

Parameters:

a_attribute - The performance attribute.

a_node - The XML node.

Method Detail

addValue

public void addValue(long a_lTimeStamp,
                     int a_lValue)

Adds a value to the floating time entry.

Parameters:

a_lTimeStamp - The timestamp of the value.

a_lValue - The value.

setBound

public void setBound(PerformanceEntry.Bound a_bound)

Sets the bound value. Only allowed by the client.

Parameters:

a_lValue - The value.

setBestBound

public void setBestBound(int a_lValue)

Sets the best bound value. Only allowed by the client.

Parameters:

a_lValue - The value.

getBound

public PerformanceEntry.Bound getBound()

Returns the bound value. If it is invoked by the client the stored m_lBoundValue is returned otherwise the bound value is calculated from the values in the entry. When invoked by an active InfoService, the bound is calculated be removing the BOUND_ROUNDING per cent (%) worst results. The remaining worst result is then compared to BOUNDARIES. The best value from BOUNDARIES, that is equal to or worse than the real worst value after removing the others is the bound. In this form, the bound reacts quite fast on bad values, but recovers very slow if the problems are gone and good values show up again. It is therefore 'tuned' as follows: Look for the time of the last value that was equal to or worse than the next best bound compared to the bound calculated as above. If there are at least BOUND_ROUNDING per cent (%) valid values (errors and tries are not counted) left afterwards, calculate the bound again but remove all later values from the calculation. This should honor the fact that some services quickly recover from bad performance.

Returns:

The bound value.

calculateBound

private int calculateBound(java.util.Hashtable a_hashValues,
                           java.util.Vector a_timestamps)

Returns the bound value. If it is invoked by the client the stored m_lBoundValue is returned otherwise the bound value is calculated from the values in the entry. When invoked by an active InfoService, the bound is calculated be removing the BOUND_ROUNDING per cent (%) worst results. The remaining worst result is then compared to BOUNDARIES. The best value from BOUNDARIES, that is equal to or worse than the real worst value after removing the others is the bound.

Parameters:

a_bLow - Low or high bound.

Returns:

The bound value.

getBestBound

public int getBestBound()

Returns the best bound value. If it is invoked by the client the stored m_lBoundValue is returned otherwise the bound value is calculated from the values in the entry.

Returns:

The best bound value.

getBoundFromValue

private int getBoundFromValue(int value)

getAverage

public int getAverage()

Calculates and return the average value.

Returns:

The average value.

getStdDeviation

public double getStdDeviation()

Calculates and returns the standard deviation.

Returns:

The standard deviation.

toXmlElement

public org.w3c.dom.Element toXmlElement(org.w3c.dom.Document a_doc)

Description copied from interface: IXMLEncodable

Return an element that can be appended to the document. This Method must not change the document in any way!

Specified by:

toXmlElement in interface IXMLEncodable

Parameters:

a_doc - a document

Returns:

the interface as xml element