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Performance: Lazy Worker-Pool Init + XSL-Stylesheet-Caching

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RAM-Optimierung (Lazy Loading):
- Worker-Pools werden erst bei Transformation gestartet (nicht beim Projekt-Öffnen)
- Worker-Pools werden nach Transformation automatisch beendet
- RAM im Ruhezustand: 0 MB (vorher: ~1.2 GB)
- Temporäre Verzeichnisse werden sauber aufgeräumt

XSL-Stylesheet-Caching (Massive Performance-Steigerung):
- Saxon s9api: HashMap<String, XsltExecutable> Cache
- Saxon JAXP: HashMap<String, Templates> Cache
- Kompilierte Stylesheets werden pro Worker wiederverwendet
- Bei 82 Transformationen mit 8 XSL-Dateien:
  * 1. Durchlauf: 8× Kompilierung
  * Weitere 74×: Cache-Treffer (sehr schnell!)

Technische Details:
- Worker-Pool-Init verschoben von _on_project_opened zu _start_transformation
- Worker-Pool-Shutdown in _on_all_transformations_finished
- Java-seitiger HashMap-Cache für beide Saxon-Varianten
- Cache-Logging für Debugging

Perfekt für Dauerbetrieb im Hintergrund!

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
Vitali Graf
2026-01-07 18:44:32 +01:00
parent d3dc07cbf3
commit f59e51c081
5 changed files with 58 additions and 21 deletions
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src/saxon_pool.py
+25 -8
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@@ -34,7 +34,10 @@ public class SaxonWorker {
// Create TransformerFactory once and reuse
TransformerFactory factory = TransformerFactory.newInstance();
System.err.println("SaxonWorker started and ready (using JAXP Transformer API)");
// Cache für kompilierte Stylesheets (Performance-Optimierung)
Map<String, Templates> templatesCache = new HashMap<>();
System.err.println("SaxonWorker started and ready (using JAXP Transformer API with stylesheet caching)");
System.err.flush();
try {
@@ -66,19 +69,33 @@ public class SaxonWorker {
String xslStylesheet = parts[1];
String outputFo = parts[2];
System.err.println("DEBUG: Creating transformer from stylesheet...");
// Prüfe ob Stylesheet bereits im Cache ist
Templates templates;
if (templatesCache.containsKey(xslStylesheet)) {
templates = templatesCache.get(xslStylesheet);
System.err.println("DEBUG: Using cached stylesheet: " + xslStylesheet);
System.err.flush();
} else {
System.err.println("DEBUG: Compiling and caching stylesheet: " + xslStylesheet);
System.err.flush();
StreamSource xslSource = new StreamSource(new File(xslStylesheet));
templates = factory.newTemplates(xslSource);
templatesCache.put(xslStylesheet, templates);
System.err.println("DEBUG: Stylesheet compiled and cached (cache size: " + templatesCache.size() + ")");
System.err.flush();
}
System.err.println("DEBUG: Creating transformer from cached template...");
System.err.flush();
// Create Source and Result objects
StreamSource xslSource = new StreamSource(new File(xslStylesheet));
StreamSource xmlSource = new StreamSource(new File(sourceXml));
StreamResult result = new StreamResult(new File(outputFo));
System.err.println("DEBUG: Compiling stylesheet...");
System.err.flush();
// Create transformer from stylesheet
Transformer transformer = factory.newTransformer(xslSource);
// Create transformer from templates
Transformer transformer = templates.newTransformer();
// Set parameters if present
if (parts.length > 3 && !parts[3].isEmpty()) {