net.i2p.router.web

Class GraphListener

java.lang.Object

net.i2p.router.web.GraphListener

All Implemented Interfaces:

RateSummaryListener

public class GraphListener
extends Object
implements RateSummaryListener

Creates and updates the in-memory or on-disk RRD database, and provides methods to generate graphs of the data

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static ConsolFun	CF
(package private) static DsType	DS
static int	MAX_ROWS
(package private) static int	PERIODS
static String	PROP_PERSISTENT
(package private) static String	RRD_DIR note that .jrb files are NOT compatible with .rrd files
(package private) static String	RRD_PREFIX
(package private) static String	RRD_SUFFIX

Constructor Summary

Constructors

Constructor and Description
GraphListener(Rate r)

Method Summary

Modifier and Type	Method and Description
void	add(double totalValue, long eventCount, double totalEventTime, long period) Called to add rate statistics for a period.
(package private) static String	createName(I2PAppContext ctx, String wanted) JRobin can only deal with 20 character data source names, so we need to create a unique, munged version from the user/developer-visible name.
boolean	equals(Object obj)
(package private) RrdBackendFactory	getBackendFactory()
(package private) RrdDb	getData()
(package private) String	getEventName()
(package private) String	getName()
Rate	getRate()
(package private) int	getRows()
int	hashCode()
(package private) long	now()
void	renderPng(OutputStream out)
void	renderPng(OutputStream out, int width, int height, boolean hideLegend, boolean hideGrid, boolean hideTitle, boolean showEvents, int periodCount, int end, boolean showCredit) Single graph.
void	renderPng(OutputStream out, int width, int height, boolean hideLegend, boolean hideGrid, boolean hideTitle, boolean showEvents, int periodCount, int end, boolean showCredit, GraphListener lsnr2, String titleOverride) Single or two-data-source graph.
boolean	startListening()
void	stopListening()

Methods inherited from class java.lang.Object

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

Field Detail

CF

static final ConsolFun CF

DS

static final DsType DS

MAX_ROWS

public static final int MAX_ROWS

See Also:

Constant Field Values

PERIODS

static final int PERIODS

See Also:

Constant Field Values

PROP_PERSISTENT

public static final String PROP_PERSISTENT

See Also:

Constant Field Values

RRD_DIR

static final String RRD_DIR

note that .jrb files are NOT compatible with .rrd files

See Also:

Constant Field Values

RRD_PREFIX

static final String RRD_PREFIX

See Also:

Constant Field Values

RRD_SUFFIX

static final String RRD_SUFFIX

See Also:

Constant Field Values

Constructor Detail

GraphListener

public GraphListener(Rate r)

Method Detail

add

public void add(double totalValue,
                long eventCount,
                double totalEventTime,
                long period)

Description copied from interface: RateSummaryListener

Called to add rate statistics for a period.

Specified by:

add in interface RateSummaryListener

Parameters:

totalValue - sum of all event values in the most recent period

eventCount - how many events occurred

totalEventTime - how long the events were running for

period - how long this period is

createName

static String createName(I2PAppContext ctx,
                         String wanted)

JRobin can only deal with 20 character data source names, so we need to create a unique, munged version from the user/developer-visible name.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

getBackendFactory

RrdBackendFactory getBackendFactory()

getData

RrdDb getData()

getEventName

String getEventName()

getName

String getName()

getRate

public Rate getRate()

getRows

int getRows()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

now

long now()

renderPng

public void renderPng(OutputStream out)
               throws IOException

Throws:

IOException

renderPng

public void renderPng(OutputStream out,
                      int width,
                      int height,
                      boolean hideLegend,
                      boolean hideGrid,
                      boolean hideTitle,
                      boolean showEvents,
                      int periodCount,
                      int end,
                      boolean showCredit)
               throws IOException

Single graph.

Parameters:

end - number of periods before now

Throws:

IOException

renderPng

public void renderPng(OutputStream out,
                      int width,
                      int height,
                      boolean hideLegend,
                      boolean hideGrid,
                      boolean hideTitle,
                      boolean showEvents,
                      int periodCount,
                      int end,
                      boolean showCredit,
                      GraphListener lsnr2,
                      String titleOverride)
               throws IOException

Single or two-data-source graph.

Parameters:

lsnr2 - 2nd data source to plot on same graph, or null. Not recommended for events.

titleOverride - If non-null, overrides the title

Throws:

IOException

startListening

public boolean startListening()

Returns:

success

stopListening

public void stopListening()