/**
* <p>Returns RRD definition object which can be used to create new RRD
* with the same creation parameters but with no data in it.</p>
* <p/>
* <p>Example:</p>
* <p/>
* <pre>
* RrdDb rrd1 = new RrdDb("original.rrd");
* RrdDef def = rrd1.getRrdDef();
* // fix path
* def.setPath("empty_copy.rrd");
* // create new RRD file
* RrdDb rrd2 = new RrdDb(def);
* </pre>
*
* @return RRD definition.
*/
public RrdDef getRrdDef()
{
lock (sync)
{
// set header
long startTime = header.getLastUpdateTime();
long step = header.getStep();
String path = backend.getPath();
RrdDef rrdDef = new RrdDef(path, startTime, step);
// add Datasources
foreach (Datasource Datasource in Datasources)
{
DsDef dsDef = new DsDef(Datasource.DsName,
Datasource.DsType, Datasource.Heartbeat,
Datasource.MinValue, Datasource.MaxValue);
rrdDef.addDatasource(dsDef);
}
// add archives
foreach (Archive archive in archives)
{
ArcDef arcDef = new ArcDef(archive.getConsolFun(),
archive.getXff(), archive.getSteps(), archive.getRows());
rrdDef.addArchive(arcDef);
}
return(rrdDef);
}
}
public void process(long newTime, double newValue)
{
Header header = parentDb.getHeader();
long step = header.getStep();
long oldTime = header.getLastUpdateTime();
long startTime = Util.normalize(oldTime, step);
long endTime = startTime + step;
double oldValue = lastValue.get();
double updateValue = calculateUpdateValue(oldTime, oldValue, newTime, newValue);
if (newTime < endTime)
{
accumulate(oldTime, newTime, updateValue);
}
else
{
// should store something
long boundaryTime = Util.normalize(newTime, step);
accumulate(oldTime, boundaryTime, updateValue);
double value = calculateTotal(startTime, boundaryTime);
// how many updates?
long numSteps = (boundaryTime - endTime) / step + 1L;
// ACTION!
parentDb.archive(this, value, numSteps);
// cleanup
nanSeconds.set(0);
accumValue.set(0.0);
accumulate(boundaryTime, newTime, updateValue);
}
}
public Datasource(RrdDb parentDb, DsDef dsDef)
{
bool shouldInitialize = dsDef != null;
this.parentDb = parentDb;
dsName = new RrdString(this);
dsTypeName = new RrdString(this);
if (!shouldInitialize)
{
dsType = new DsType(dsTypeName.get());
}
heartbeat = new RrdLong(this);
minValue = new RrdDouble(this);
maxValue = new RrdDouble(this);
lastValue = new RrdDouble(this);
accumValue = new RrdDouble(this);
nanSeconds = new RrdLong(this);
if (shouldInitialize)
{
dsName.set(dsDef.getDsName());
dsType = dsDef.getDsType();
dsTypeName.set(dsType.Name);
heartbeat.set(dsDef.getHeartbeat());
minValue.set(dsDef.getMinValue());
maxValue.set(dsDef.getMaxValue());
lastValue.set(Double.NaN);
accumValue.set(0.0);
Header header = parentDb.getHeader();
nanSeconds.set(header.getLastUpdateTime() % header.getStep());
}
}
public ArcState(Archive parentArc, bool shouldInitialize)
{
this.parentArc = parentArc;
accumValue = new RrdDouble(this);
nanSteps = new RrdLong(this);
if (shouldInitialize)
{
Header header = parentArc.getParentDb().getHeader();
long step = header.getStep();
long lastUpdateTime = header.getLastUpdateTime();
long arcStep = parentArc.getArcStep();
long initNanSteps = (Util.normalize(lastUpdateTime, step) -
Util.normalize(lastUpdateTime, arcStep)) / step;
accumValue.set(Double.NaN);
nanSteps.set(initNanSteps);
}
}