/**
* Initiates the dereferencing process of some of the URIs identified in the dataset, chosen in
* accordance with a statistical sampling method, in order to compute the estimated
* dereferenceability of the whole dataset
*
* @return estimated dereferencibility, computed as aforementioned
*/
@Override
public double metricValue() {
if (!this.metricCalculated) {
uriSet.addAll(this.fqurisReservoir.getItems());
double uriSize = (double) uriSet.size();
// Process
this.httpRetreiver.addListOfResourceToQueue(this.fqurisReservoir.getItems());
this.httpRetreiver.start(true);
do {
this.checkForForwardLinking();
uriSet.clear();
uriSet.addAll(this.notFetchedQueue);
this.notFetchedQueue.clear();
} while (!this.uriSet.isEmpty());
this.metricCalculated = true;
httpRetreiver.stop();
// End Process
metricValue = (totalDerefDataWithSub == 0.0) ? 0.0 : (double) totalDerefDataWithSub / uriSize;
statsLogger.info(
"Estimated Dereferencable Forward Links Metric: Dataset: {} - Total # Forward Links URIs {}; Total URIs : {}",
EnvironmentProperties.getInstance().getDatasetURI(),
totalDerefDataWithSub,
uriSize);
}
return this.metricValue;
}
@Override
public double metricValue() {
double noDocs = this.docs.size();
double noDocsWithoutEndorcement = 0.0;
for (DigitalSignature ds : this.docs.values())
noDocsWithoutEndorcement += (ds.fullEndorcement()) ? 1 : 0;
statsLogger.info(
"DigitalSignatureUsage. Dataset: {} - Total # Documents : {}; # Documents without Endorcement : {};",
EnvironmentProperties.getInstance().getDatasetURI(),
noDocs,
noDocsWithoutEndorcement);
return (noDocsWithoutEndorcement / noDocs);
}