package org.aksw.simba.fedsum.util;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import org.eclipse.rdf4j.query.MalformedQueryException;
import org.eclipse.rdf4j.query.QueryEvaluationException;
import org.eclipse.rdf4j.repository.RepositoryException;
public class FedSumUpdate {
/**
* Update Index regularly on a specific date and time
* @param lstEndPoints List of SPARQL endpoints
* @param date specific date and time in "dd-MM-yyyy HH:mm:ss"
* @param outputFile Output location of index
*/
public static void updateIndexAtFixedTime(final List<String> lstEndPoints, Date date, final String outputFile) {
Timer timer = new Timer();
timer.schedule(new TimerTask() {public void run() { try {
FedSumGenerator generator = new FedSumGenerator(outputFile);
long startTime = System.currentTimeMillis();
generator.generateSummaries(lstEndPoints);
System.out.println("Index is secessfully updated to "+ outputFile);
System.out.println("Data Summaries Generation Time (sec): "+ (System.currentTimeMillis()-startTime)/1000);
} catch (IOException | RepositoryException | MalformedQueryException | QueryEvaluationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} }, date);
}
/**
* Update Index after a fixed interval
* @param lstEndPoints List of SPARQL endpoints
* @param interval Interval in milliseconds
* @param outputFile Output location of index
*/
public static void updateIndexAtFixedRate(final List<String> lstEndPoints, long interval, final String outputFile) {
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {public void run() { try {
FedSumGenerator generator = new FedSumGenerator(outputFile);
long startTime = System.currentTimeMillis();
generator.generateSummaries(lstEndPoints);
System.out.println("Index is secessfully updated to "+ outputFile);
System.out.println("Data Summaries Generation Time (sec): "+ (System.currentTimeMillis()-startTime)/1000);
} catch (IOException | RepositoryException | MalformedQueryException | QueryEvaluationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} }, 0, interval);
}
}
