generate

Dockerfile

@@ -25,5 +25,5 @@ RUN chown appuser:appgroup app.jar
 # Switch to the non-root user
 USER appuser
 
-# Run the jar file with JVM flags for heap dump generation on OutOfMemoryError
+# Run the jar file with JVM flags for heap dump generation on OutOfMemoryError and headless mode
-ENTRYPOINT ["java", "-XX:+HeapDumpOnOutOfMemoryError", "-XX:HeapDumpPath=/dumps/heap.hprof", "-jar", "app.jar"]
+ENTRYPOINT ["java", "-Djava.awt.headless=true", "-XX:+HeapDumpOnOutOfMemoryError", "-XX:HeapDumpPath=/dumps/heap.hprof", "-jar", "app.jar"]

src/main/java/kz/konturai/parser/service/ReportGenerationService.java

@@ -325,14 +325,28 @@ public class ReportGenerationService {
     }
 
     private byte[] buildSentimentChart(Map<String, Long> sentiment) {
-        DefaultPieDataset<String> dataset = new DefaultPieDataset<>();
-        for (Map.Entry<String, Long> e : sentiment.entrySet()) {
-            dataset.setValue(e.getKey(), e.getValue());
-        }
-        JFreeChart chart = ChartFactory.createPieChart("Sentiment", dataset, true, false, false);
         try {
-            return EncoderUtil.encode(chart.createBufferedImage(800, 500), ImageFormat.PNG);
+            // Disable font rendering to avoid Docker font issues
+            System.setProperty("java.awt.headless", "true");
+
+            DefaultPieDataset<String> dataset = new DefaultPieDataset<>();
+            for (Map.Entry<String, Long> e : sentiment.entrySet()) {
+                dataset.setValue(e.getKey(), e.getValue());
+            }
+
+            JFreeChart chart = ChartFactory.createPieChart("Sentiment", dataset, true, false, false);
+
+            // Create buffered image with headless graphics
+            java.awt.image.BufferedImage image = new java.awt.image.BufferedImage(800, 500,
+                    java.awt.image.BufferedImage.TYPE_INT_RGB);
+            java.awt.Graphics2D g2d = image.createGraphics();
+            g2d.setRenderingHint(java.awt.RenderingHints.KEY_ANTIALIASING, java.awt.RenderingHints.VALUE_ANTIALIAS_ON);
+            chart.draw(g2d, new java.awt.geom.Rectangle2D.Double(0, 0, 800, 500));
+            g2d.dispose();
+
+            return EncoderUtil.encode(image, ImageFormat.PNG);
         } catch (Exception ex) {
+            // Return null if chart generation fails
             return null;
         }
     }

src/main/resources/application.properties

@@ -3,6 +3,9 @@ minio.endpoint=http://92.38.48.166:9000
 minio.access-key=z9HhZTjzhVWqw3D20u7q
 minio.secret-key=lhhHtJow1b10z6EZRMTQIU1tsKkoaxCVpSypCrcb
 minio.bucket-name=konturai
+
+# Headless mode for chart generation in Docker
+java.awt.headless=true
 spring.application.name=parser
 
 # MongoDB Configuration