add job service to be able to cancel plot requests

pdb-plotting/src/main/java/org/lucares/recommind/logs/Gnuplot.java

@@ -13,6 +13,7 @@ import java.util.Collection;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
+import org.lucares.pdb.api.AbortException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -37,6 +38,8 @@ public class Gnuplot {
     public void plot(final GnuplotSettings settings, final Collection<DataSeries> dataSeries)
             throws IOException, InterruptedException {
 
+        AbortException.abortIfInterrupted();
+
         final GnuplotFileGenerator generator = new GnuplotFileGenerator();
 
         final String gnuplotFileContent = generator.generate(settings, dataSeries);

pdb-plotting/src/main/java/org/lucares/recommind/logs/Plotter.java

@@ -17,6 +17,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 import java.util.stream.Stream;
 
 import org.lucares.collections.LongList;
+import org.lucares.pdb.api.AbortException;
 import org.lucares.pdb.api.DateTimeRange;
 import org.lucares.pdb.api.GroupResult;
 import org.lucares.pdb.api.Query;
@@ -145,7 +146,7 @@ public class Plotter {
             return new PlotResult(outputFile, dataSeries, thumbnail);
         } catch (final InterruptedException e) {
             Thread.currentThread().interrupt();
-            throw new IllegalStateException("Plotting was interrupted.");
+            throw new AbortException();
         } catch (final IOException e) {
             throw new InternalPlottingException("Plotting failed: " + e.getMessage(), e);
         } finally {
@@ -176,6 +177,8 @@ public class Plotter {
 
         final Iterator<LongList> it = timeValueStream.iterator();
         while (it.hasNext()) {
+            AbortException.abortIfInterrupted();
+
             final LongList entry = it.next();
 
             for (int i = 0; i < entry.size(); i += 2) {