return information about the plotted sequences

this information can be used for tests

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

@@ -2,6 +2,9 @@ package org.lucares.recommind.logs;
 
 import java.io.File;
 import java.util.Comparator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
 
 public class DataSeries {
 	public static final Comparator<? super DataSeries> BY_VALUES = (a, b) -> {
@@ -46,4 +49,16 @@ public class DataSeries {
 	public int getValues() {
 		return values;
 	}
+
+	public static Map<String, Integer> toMap(final List<DataSeries> dataSeries) {
+		final Map<String, Integer> result = new LinkedHashMap<>();
+
+		for (final DataSeries dataSerie : dataSeries) {
+
+			result.put(dataSerie.getTitle(), dataSerie.values);
+
+		}
+
+		return result;
+	}
 }

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

@@ -21,7 +21,7 @@ public class GnuplotFileGenerator {
 
 		appendfln(result, "set ylabel \"%s\"", settings.getYlabel());
 
-		appendfln(result, "set output \"%s\"", settings.getOutput().getAbsolutePath());
+		appendfln(result, "set output \"%s\"", settings.getOutput().toAbsolutePath());
 		appendf(result, "plot ");
 
 		for (final DataSeries dataSerie : dataSeries) {

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

@@ -1,6 +1,6 @@
 package org.lucares.recommind.logs;
 
-import java.io.File;
+import java.nio.file.Path;
 
 public class GnuplotSettings {
 	private String terminal = "png";
@@ -21,12 +21,12 @@ public class GnuplotSettings {
 	private String ylabel = "Duration in ms";
 
 	// set output "datausage.png"
-	private File output = new File("/tmp/out.png");
+	private final Path output;
 
 	// set xtics rotate by 80
 	private int rotateXAxisLabel = -80;
 
-	public GnuplotSettings(final File output) {
+	public GnuplotSettings(final Path output) {
 		this.output = output;
 	}
 
@@ -102,14 +102,10 @@ public class GnuplotSettings {
 		this.ylabel = ylabel;
 	}
 
-	public File getOutput() {
+	public Path getOutput() {
 		return output;
 	}
 
-	public void setOutput(final File output) {
-		this.output = output;
-	}
-
 	// plot 'sample.txt' using 1:2 title 'Bytes' with linespoints 2
 
 }

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

@@ -0,0 +1,23 @@
+package org.lucares.recommind.logs;
+
+import java.nio.file.Path;
+import java.util.List;
+
+public class PlotResult {
+	private final Path imageName;
+	private final List<DataSeries> dataSeries;
+
+	public PlotResult(final Path imageName, final List<DataSeries> dataSeries) {
+		super();
+		this.imageName = imageName;
+		this.dataSeries = dataSeries;
+	}
+
+	public Path getImageName() {
+		return imageName;
+	}
+
+	public List<DataSeries> getDataSeries() {
+		return dataSeries;
+	}
+}

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

@@ -9,7 +9,6 @@ import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.LinkOption;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.time.Instant;
 import java.time.OffsetDateTime;
 import java.time.ZoneOffset;
@@ -29,7 +28,6 @@ import org.lucares.pdb.api.Tags;
 import org.lucares.pdb.plot.api.Limit;
 import org.lucares.pdb.plot.api.PlotSettings;
 import org.lucares.performance.db.FileUtils;
-import org.lucares.performance.db.Grouping;
 import org.lucares.performance.db.PerformanceDb;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -59,7 +57,7 @@ public class Plotter {
 		return outputDir;
 	}
 
-	public File plot(final PlotSettings plotSettings) throws InternalPlottingException {
+	public PlotResult plot(final PlotSettings plotSettings) throws InternalPlottingException {
 
 		final String tmpSubDir = uniqueDirectoryName();
 		final Path tmpDir = tmpBaseDir.resolve(tmpSubDir);
@@ -102,14 +100,15 @@ public class Plotter {
 
 			sortAndLimit(dataSeries, plotSettings);
 
-			final File outputFile = File.createTempFile("out", ".png", outputDir.toFile());
+			final Path outputFile = Files.createTempFile(outputDir, "out", ".png");
 			final Gnuplot gnuplot = new Gnuplot(tmpBaseDir);
 			final GnuplotSettings gnuplotSettings = new GnuplotSettings(outputFile);
 			gnuplotSettings.setHeight(height);
 			gnuplotSettings.setWidth(width);
 			gnuplotSettings.setFormatX(getFormatX(minDate, maxDate));
 			gnuplot.plot(gnuplotSettings, dataSeries);
-			return outputFile;
+
+			return new PlotResult(outputFile.getFileName(), dataSeries);
 		} catch (final InterruptedException e) {
 			Thread.currentThread().interrupt();
 			throw new IllegalStateException("Plotting was interrupted.");
@@ -176,34 +175,6 @@ public class Plotter {
 
 	}
 
-	public static void main(final String[] args) throws Exception {
-		final Path dataDirectory = Paths.get(args[0]);
-		final Path outputDirectory = Paths.get(args[1]);
-		final String query = args[2];
-		final Path tmpBaseDir = Paths.get(args[0], "tmp", "gnuplot");
-		Files.createDirectories(tmpBaseDir);
-		Files.createDirectories(outputDirectory);
-		try {
-
-			try (PerformanceDb db = new PerformanceDb(dataDirectory)) {
-				final Plotter plotter = new Plotter(db, tmpBaseDir, outputDirectory);
-				// query, 1600, 1200, Grouping.NO_GROUPING
-
-				final PlotSettings plotSettings = new PlotSettings();
-				plotSettings.setQuery(query);
-				plotSettings.setWidth(1600);
-				plotSettings.setHeight(1200);
-				plotSettings.setGroupBy(Grouping.NO_GROUPING);
-
-				final File image = plotter.plot(plotSettings);
-				LOGGER.trace("plotted image: {}", image);
-			}
-
-		} finally {
-			FileUtils.delete(tmpBaseDir);
-		}
-	}
-
 	private static CsvSummary toCsv(final Stream<Entry> entries, final File dataFile, final OffsetDateTime dateFrom,
 			final OffsetDateTime dateTo) throws IOException {