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

Class Swimlanes

java.lang.Object

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

public class Swimlanes
extends Object

Static image generation for Swimlanes visualization for scalable rendering on front-end client (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
static class	Swimlanes.CoordScaler Provides convenient rescaling of raw values to be plotted to actual pixels for plotting on image
static class	Swimlanes.SwimlanesStateAction Prefuse action for plotting a line for each state
static class	Swimlanes.SwimlanesStatePalette Provide constant mapping between state names and colours so that even if particular states are missing, the colours are fixed for each state

Constructor Summary

Constructors

Constructor and Description
Swimlanes()
Swimlanes(javax.servlet.http.HttpServletRequest request)
Swimlanes(String timezone, String cluster, String event_type, HashMap<String,String> valmap) Constructor for Swimlanes visualization object
Swimlanes(String timezone, String cluster, String event_type, HashMap<String,String> valmap, int width, int height)
Swimlanes(String timezone, String cluster, String event_type, HashMap<String,String> valmap, int width, int height, String legend_opt)

Method Summary

Modifier and Type	Method and Description
prefuse.data.Table	getData()
boolean	getImage(OutputStream output, String img_fmt, double scale) Generates image in specified format, and writes image as binary output to supplied output stream
void	run()
void	setDimensions(int width, int height) Set dimensions of image to be generated Call before calling @see #run
void	setJobName(String s) Set job ID to filter results on Call before calling @see #run
void	setLegend(boolean legendopt) Specify whether to print legend of states Advisable to not print legend for excessively small images since legend has fixed point size Call before calling @see #run

Methods inherited from class java.lang.Object

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

Constructor Detail

Swimlanes

public Swimlanes()

Swimlanes

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

Constructor for Swimlanes visualization object

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

Swimlanes

public Swimlanes(String timezone,
                 String cluster,
                 String event_type,
                 HashMap<String,String> valmap,
                 int width,
                 int height)

Swimlanes

public Swimlanes(String timezone,
                 String cluster,
                 String event_type,
                 HashMap<String,String> valmap,
                 int width,
                 int height,
                 String legend_opt)

Swimlanes

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

Method Detail

setJobName

public void setJobName(String s)

Set job ID to filter results on Call before calling @see #run

Parameters:

s - job name

setDimensions

public void setDimensions(int width,
                          int height)

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

Parameters:

width - image width in pixels

height - image height in pixels

setLegend

public void setLegend(boolean legendopt)

Specify whether to print legend of states Advisable to not print legend for excessively small images since legend has fixed point size Call before calling @see #run

Parameters:

legendopt - parameter to turn on legends

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

Parameters:

output - output stream of image

img_fmt - image format

scale - image scaling factor

Returns:

true if image is saved

run

public void run()

getData

public prefuse.data.Table getData()