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graph.jsp
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<html>
<meta charset="utf8" />
<%@ page import="java.io.*" %>
<%@ page import="java.sql.*" %>
<%@ page import="java.util.*" %>
<head>
<style>
* { font-family: Sans-serif; }
canvas { position: absolute; left: 0; top: 0; z-index: -1; }
#indicator { float: right; }
</style>
<% // Get parmeters from config file and from url
Properties conf = new Properties();
conf.load(new FileInputStream(getServletContext().getRealPath("/")+"/config.properties"));
String driver = conf.getProperty("driver");
Class.forName("org.mariadb.jdbc.Driver");
Statement db = DriverManager.getConnection(
conf.getProperty("connection"),
conf.getProperty("username"),
conf.getProperty("password")
).createStatement();
String source = conf.getProperty("source");
String trans = request.getParameter("trans");
String measure = request.getParameter("measure");
int graphDotSize = 3;
String sql;
ResultSet rs;
%>
</head>
<body>
<select id="Transformation" onchange="refresh()" >
<%
sql = "SELECT DISTINCT Transformation FROM ("+source+") a ORDER BY 1";
rs = db.executeQuery(sql);
out.println("<option disabled selected value=''>Transformation:</option>");
while(rs.next())
out.println("<option>"+rs.getString(1)+"</option>");
rs.close();
%>
</select>
<script>
document.getElementById('Transformation').value = '<%= trans %>';
</script>
<select id="Measure" onchange="refresh()" >
<%
sql = source+" LIMIT 1";
rs = db.executeQuery(sql);
ResultSetMetaData meta = rs.getMetaData();
out.println("<option disabled selected value=''>Measure:</option>");
out.println("<option value='Date'>Time since last run</option>");
for(int i=3; i<=meta.getColumnCount(); i++)
if(isNumeric(meta.getColumnType(i)))
out.println("<option>"+meta.getColumnLabel(i)+"</option>");
rs.close();
%>
</select>
<script>
document.getElementById('Measure').value = '<%= measure %>';
</script>
<div id="indicator">
<input id="fit" type="checkbox" onchange="graph()" />Fit<br>
<input id="trend" type="checkbox" onchange="graph()" />Trend<br>
<input id="interval" type="checkbox" onchange="graph()" />Interval<br>
<input id="smoothing" type="checkbox" onchange="graph()" />Smoothing<br>
<input id="factor" type="range" oninput="graph()" step="any" value="30" >
</div>
<canvas id="graph"></canvas>
<script>
var data = [];
var stat = {};
onload = () => {
data = [];
<%
if(trans!=null && measure!=null && !measure.isEmpty()){
sql = "SELECT Date, "+measure+" FROM ("+source+") a WHERE Transformation='"+trans+"' ORDER BY 1";
rs = db.executeQuery(sql);
while(rs.next())
out.println("data.push({t:'"+rs.getString(1)+"',x:'"+rs.getString(2)+"'});");
rs.close();
}%>
if(data.length>0){
if("<%= measure %>"=="Date"){
var x_ = 0;
for(d of data){
var x = new Date(d.x).getTime();
d.x = (x-x_) /1000/60/60/24;
x_ = x;
}
data.shift();
}
else if(p = data[0].x .match(/^(\d\d):(\d\d):(\d\d)/))
for(d of data){
p = d.x .match(/^(\d\d):(\d\d):(\d\d)/);
if(p)
d.x = Number(p[1])*3600+Number(p[2])*60+Number(p[3]);
}
else for(d of data)
d.x = Number(d.x);
stat = computeStatistics(data);
graph();
}
}
refresh = () => {
var measure = document.getElementById('Measure').value;
var url = '<%= request.getRequestURL() %>';
url += '?trans='+document.getElementById('Transformation').value;
url += '&measure='+document.getElementById('Measure').value;
//console.log(url);
window.location = url;
}
<%!
boolean isNumeric(int type){
if(type==Types.BIGINT)
return true;
if(type==Types.DECIMAL)
return true;
if(type==Types.DOUBLE)
return true;
if(type==Types.FLOAT)
return true;
if(type==Types.INTEGER)
return true;
if(type==Types.NUMERIC)
return true;
if(type==Types.REAL)
return true;
if(type==Types.SMALLINT)
return true;
if(type==Types.DATE)
return true;
if(type==Types.TIME)
return true;
if(type==Types.TIMESTAMP)
return true;
if(type==Types.TIMESTAMP_WITH_TIMEZONE)
return true;
if(type==Types.TIME_WITH_TIMEZONE)
return true;
return false;
} %>
graph = () => {
g = document.querySelector('canvas').getContext("2d");
g.canvas.width = window.innerWidth;
g.canvas.height = window.innerHeight;
g.tMin = 0.07 * g.canvas.width;
g.tMax = 0.95 * g.canvas.width;
g.xMin = 0.8 * g.canvas.height
g.xMax = 0.1 * g.canvas.height;
g.dot = <%= graphDotSize %>;
data.tMin = new Date('2017-04-01').getTime();
data.tMax = new Date('2017-11-01').getTime();
data.xMin = 0;
data.xMax = 0;
data.xStep ;
for(var d of data)
if(data.xMax<d.x)
data.xMax = d.x;
if(data.xMax<=0) data.xMax=1;
var size = Math.pow(10, Math.floor(Math.log10(data.xMax)));
for(var m of [1.5, 2.0, 2.5, 5.0, 7.5, 10.])
if(data.xMax < m*size)
break;
data.xMax = m*size;
if(m==1.5) data.xStep = .25*size;
if(m==2.0) data.xStep = 0.5*size;
if(m==2.5) data.xStep = 0.5*size;
if(m==5.0) data.xStep = 1.0*size;
if(m==7.5) data.xStep = 2.5*size;
if(m==10.) data.xStep = 2.0*size;
// tAxis
g.beginPath();
g.moveTo(g.tMin, g.xMin); g.lineTo(g.tMin, g.xMax);
var t = new Date('2017-04-01');
while(t < new Date('2017-11-30')){
//console.log(t);
var gt = (t-data.tMin)/(data.tMax-data.tMin) * (g.tMax-g.tMin) + g.tMin;
g.moveTo(gt, g.xMin); g.lineTo(gt, g.xMin+10);
var s = t.toISOString().substring(0,10);
g.fillText(s, gt-g.measureText(s).width/2, g.xMin+20);
t.setMonth(t.getMonth()+1);
}
g.stroke();
// xAxis
g.beginPath();
g.moveTo(g.tMin, g.xMin); g.lineTo(g.tMax, g.xMin);
for(var x = data.xMin; x<=data.xMax; x+=data.xStep){
var gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.moveTo(g.tMin, gx); g.lineTo(g.tMin-10, gx);
var s = x;
g.fillText(s, g.tMin-g.measureText(s).width-15, gx+3);
}
g.stroke();
drawData(g,data);
if(document.getElementById('fit').checked)
drawFit(g, data);
if(document.getElementById('smoothing').checked)
expSmooth(g, data);
}
drawData = (g, data) => {
g.beginPath();
for(var d of data){
var gt = (new Date(d.t)-data.tMin)/(data.tMax-data.tMin) * (g.tMax-g.tMin) + g.tMin;
var gx = (d.x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.fillRect(gt-g.dot/2, gx-g.dot/2, g.dot, g.dot);
}
g.stroke();
g.fill();
}
drawFit = (g, data) => {
g.beginPath();
g.strokeStyle="#FF0000";
var x, gx;
var trend = 0;
var dx = 0;
if(document.getElementById('trend').checked)
trend = stat.trend;
if(document.getElementById('interval').checked)
dx = 2*stat.xStd; //Math.sqrt(stat.N);
x = trend*(data.tMin-stat.tAvg) + stat.xAvg +dx;
gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.moveTo(g.tMin, gx);
x = trend*(data.tMax-stat.tAvg) + stat.xAvg +dx;
gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.lineTo(g.tMax, gx);
x = trend*(data.tMin-stat.tAvg) + stat.xAvg -dx;
gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.moveTo(g.tMin, gx);
x = trend*(data.tMax-stat.tAvg) + stat.xAvg -dx;
gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.lineTo(g.tMax, gx);
g.stroke();
}
expSmooth = (g, data) => {
g.beginPath();
g.strokeStyle="#FF0000";
var smooth = document.getElementById('factor').value /100;
smooth = smooth*smooth;
var trend = 0;
var S = 0;
var Se = 0;
var See = 0;
/*
if(document.getElementById('trend').checked)
trend = stat.trend;
*/
var x = stat.xAvg;
if(document.getElementById('interval').checked)
dx = 4*stat.xStd*stat.xStd;
var gt = (data.tMin-data.tMin)/(data.tMax-data.tMin) * (g.tMax-g.tMin) + g.tMin;
var gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.moveTo(gt, gx);
for(var d of data){
x = x + smooth*(d.x-x);
gt = (new Date(d.t).getTime()-data.tMin)/(data.tMax-data.tMin) * (g.tMax-g.tMin) + g.tMin;
gx = (x-data.xMin)/(data.xMax-data.xMin) * (g.xMax-g.xMin) + g.xMin;
g.lineTo(gt, gx);
}
g.stroke();
}
computeStatistics = (data) => {
var S = 0;
var St = 0;
var Sx = 0;
var Stt = 0;
var Stx = 0;
var Sxx = 0;
for(var d of data){
var t = new Date(d.t).getTime() ;// - data.tMin;
var x = Number(d.x);
S += 1;
St += t;
Sx += x;
Stt += t*t;
Stx += t*x;
Sxx += x*x;
}
if(S>1){
St = St /S ; //+ data.tMin;
Sx = Sx /S;
Stt = (Stt - S*St*St) /(S-1);
Stx = (Stx - S*St*Sx) /(S-1);
Sxx = (Sxx - S*Sx*Sx) /(S-1);
}
var trend = Stx / Stt;
return {N: S, tAvg: St, xAvg: Sx, xStd: Math.sqrt(Sxx), trend: trend } ;
}
</script>
</body>