org.apache.hadoop.chukwa.analysis.salsa.visualization

Class Heatmap

java.lang.Object

org.apache.hadoop.chukwa.analysis.salsa.visualization.Heatmap

public class Heatmap
extends Object

Static image rendering for heatmap visualization of spatial HDFS activity patterns for scalable rendering on front-end (web-browser) Handles database data retrieval, transforming data to form for visualization elements, and initializing and calling visualization elements

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	Heatmap.HeatmapData Internal representation of all data needed to render heatmap; data-handling code populates this data structure

Field Summary

Fields

Modifier and Type	Field and Description
protected String	add_info_extra
protected String	cluster
protected Rectangle2D	dataBound
protected prefuse.Display	dis
protected Rectangle2D	labelBottomBound
protected boolean	offline_use
protected HashMap<String,String>	param_map
protected boolean	plot_additional_info
protected boolean	plot_legend
protected HashMap<String,String>	prettyStateNames
protected String	query_stat_type
protected String	query_state
protected javax.servlet.http.HttpServletRequest	request
protected boolean	sort_nodes
protected String	table
protected String	timezone
protected prefuse.Visualization	viz
protected Rectangle2D	xlabBound
protected Rectangle2D	ylabBound

Constructor Summary

Constructors

Constructor and Description
Heatmap()
Heatmap(javax.servlet.http.HttpServletRequest request)
Heatmap(String timezone, String cluster, String event_type, String query_stat_type, HashMap<String,String> valmap)
Heatmap(String timezone, String cluster, String query_state, String query_stat_type, HashMap<String,String> valmap, int w, int h)
Heatmap(String timezone, String cluster, String query_state, String query_stat_type, HashMap<String,String> valmap, String shuffles)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addAddlInfo(Heatmap.HeatmapData hd)
protected void	addHostLabels(Heatmap.HeatmapData hd)
protected boolean	checkDone(int[] clustId)
protected long[][]	doPermute(long[][] stat, int[] permute) Reorder rows (and columns) according to a given ordering Maintains same ordering along rows and columns
Heatmap.HeatmapData	getData() Interfaces with database to get data and populate data structures for rendering
boolean	getImage(OutputStream output, String img_fmt, double scale) Generates image in specified format, and writes image as binary output to supplied output stream
protected int[]	hClust(long[][] stat) Sort data for better visualization of patterns
protected void	initPrettyNames()
void	run() Actual code that calls data, generates heatmap, and saves it
void	setDimensions(int width, int height) Set dimensions of image to be generated Call before calling @see #run
void	setLegend(boolean legendopt) Specify whether to print labels of hosts along axes Call before calling @see #run
protected Heatmap.HeatmapData	setupDataTable()
protected void	setupHeatmap(prefuse.visual.VisualTable vtab, Heatmap.HeatmapData hd)
protected void	setupRenderer()

Methods inherited from class java.lang.Object

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

Field Detail

offline_use

protected boolean offline_use

request

protected javax.servlet.http.HttpServletRequest request

param_map

protected HashMap<String,String> param_map

cluster

protected String cluster

timezone

protected String timezone

query_state

protected String query_state

query_stat_type

protected String query_stat_type

table

protected final String table

plot_legend

protected boolean plot_legend

sort_nodes

protected boolean sort_nodes

plot_additional_info

protected boolean plot_additional_info

add_info_extra

protected String add_info_extra

dis

protected prefuse.Display dis

viz

protected prefuse.Visualization viz

dataBound

protected Rectangle2D dataBound

xlabBound

protected Rectangle2D xlabBound

ylabBound

protected Rectangle2D ylabBound

labelBottomBound

protected Rectangle2D labelBottomBound

prettyStateNames

protected HashMap<String,String> prettyStateNames

Constructor Detail

Heatmap

public Heatmap()

Heatmap

public Heatmap(String timezone,
       String cluster,
       String event_type,
       String query_stat_type,
       HashMap<String,String> valmap)

Parameters:

timezone - Timezone string from environment

cluster - Cluster name from environment

event_type - Whether to display shuffles or not

valmap - HashMap of key/value pairs simulating parameters from a HttpRequest

Heatmap

public Heatmap(String timezone,
       String cluster,
       String query_state,
       String query_stat_type,
       HashMap<String,String> valmap,
       String shuffles)

Heatmap

public Heatmap(String timezone,
       String cluster,
       String query_state,
       String query_stat_type,
       HashMap<String,String> valmap,
       int w,
       int h)

Heatmap

public Heatmap(javax.servlet.http.HttpServletRequest request)

Method Detail

setDimensions

public void setDimensions(int width,
                 int height)

Set dimensions of image to be generated Call before calling @see #run

setLegend

public void setLegend(boolean legendopt)

Specify whether to print labels of hosts along axes Call before calling @see #run

getImage

public boolean getImage(OutputStream output,
               String img_fmt,
               double scale)

Generates image in specified format, and writes image as binary output to supplied output stream

setupRenderer

protected void setupRenderer()

setupDataTable

protected Heatmap.HeatmapData setupDataTable()

setupHeatmap

protected void setupHeatmap(prefuse.visual.VisualTable vtab,
                Heatmap.HeatmapData hd)

addHostLabels

protected void addHostLabels(Heatmap.HeatmapData hd)

addAddlInfo

protected void addAddlInfo(Heatmap.HeatmapData hd)

initPrettyNames

protected void initPrettyNames()

run

public void run()

Actual code that calls data, generates heatmap, and saves it

checkDone

protected boolean checkDone(int[] clustId)

hClust

protected int[] hClust(long[][] stat)

Sort data for better visualization of patterns

doPermute

protected long[][] doPermute(long[][] stat,
                 int[] permute)

Reorder rows (and columns) according to a given ordering Maintains same ordering along rows and columns

getData

public Heatmap.HeatmapData getData()

Interfaces with database to get data and populate data structures for rendering