Fix: Blockiere System.exit() mit SecurityManager statt s9api
Problem: s9api Klassen nicht im Classpath verfügbar (NoClassDefFoundError) Root Cause: Saxon's Transform.main() ruft System.exit() auf Lösung: Custom SecurityManager der System.exit() blockiert - NoExitSecurityManager: checkExit() wirft SecurityException - Fängt SecurityException ab wenn Saxon System.exit() versucht - Extrahiert Fehlermeldung aus Saxon's stderr - Worker bleibt am Leben und kann weitere Jobs verarbeiten Dieser Ansatz funktioniert mit jeder Saxon-Version ohne s9api-Abhängigkeiten. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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+77
-46
@@ -17,20 +17,33 @@ logger = logging.getLogger(__name__)
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# Java-Worker-Code (wird zur Laufzeit kompiliert)
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SAXON_WORKER_JAVA = """
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import net.sf.saxon.s9api.*;
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import javax.xml.transform.stream.StreamSource;
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import net.sf.saxon.Transform;
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import java.io.*;
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import java.util.*;
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public class SaxonWorker {
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// Custom SecurityManager to block System.exit()
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static class NoExitSecurityManager extends SecurityManager {
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@Override
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public void checkPermission(java.security.Permission perm) {
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// Allow everything
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}
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@Override
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public void checkExit(int status) {
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// Block System.exit() by throwing an exception
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throw new SecurityException("System.exit() blocked by SaxonWorker");
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}
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}
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public static void main(String[] args) {
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// Install SecurityManager to prevent System.exit()
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System.setSecurityManager(new NoExitSecurityManager());
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BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
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String line;
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// Create Saxon Processor (reusable)
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Processor processor = new Processor(false);
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System.err.println("SaxonWorker started and ready (using s9api)");
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System.err.println("SaxonWorker started and ready (System.exit blocked)");
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System.err.flush();
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try {
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@@ -62,67 +75,85 @@ public class SaxonWorker {
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String xslStylesheet = parts[1];
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String outputFo = parts[2];
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System.err.println("DEBUG: Files - XML: " + sourceXml);
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System.err.println("DEBUG: Files - XSL: " + xslStylesheet);
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System.err.println("DEBUG: Files - OUT: " + outputFo);
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System.err.println("DEBUG: Building Saxon args...");
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System.err.flush();
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// Parse parameters if present
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Map<String, String> xsltParams = new HashMap<>();
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// Build Saxon arguments
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List<String> saxonArgs = new ArrayList<>();
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saxonArgs.add("-s:" + sourceXml);
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saxonArgs.add("-xsl:" + xslStylesheet);
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saxonArgs.add("-o:" + outputFo);
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// Add parameters if present
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if (parts.length > 3 && !parts[3].isEmpty()) {
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String[] params = parts[3].split("\\\\|\\\\|\\\\|");
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for (String param : params) {
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if (!param.isEmpty() && param.contains("=")) {
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String[] kv = param.split("=", 2);
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xsltParams.put(kv[0], kv[1]);
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if (!param.isEmpty()) {
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saxonArgs.add(param);
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}
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}
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}
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System.err.println("DEBUG: Parameters: " + xsltParams.size());
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System.err.println("DEBUG: Running Saxon transformation...");
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System.err.flush();
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System.err.println("DEBUG: Compiling stylesheet...");
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System.err.flush();
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// Redirect Saxon output to stderr to avoid polluting stdout
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PrintStream oldOut = System.out;
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PrintStream oldErr = System.err;
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ByteArrayOutputStream saxonOut = new ByteArrayOutputStream();
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ByteArrayOutputStream saxonErr = new ByteArrayOutputStream();
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// Compile stylesheet (s9api)
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XsltCompiler compiler = processor.newXsltCompiler();
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XsltExecutable executable = compiler.compile(new StreamSource(new File(xslStylesheet)));
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try {
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System.setOut(new PrintStream(saxonOut));
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System.setErr(new PrintStream(saxonErr));
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System.err.println("DEBUG: Creating transformer...");
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System.err.flush();
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// Run Saxon transformation
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// If Saxon calls System.exit(), our SecurityManager will throw SecurityException
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Transform.main(saxonArgs.toArray(new String[0]));
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// Create transformer
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Xslt30Transformer transformer = executable.load30();
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// Restore streams
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System.setOut(oldOut);
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System.setErr(oldErr);
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// Set parameters
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if (!xsltParams.isEmpty()) {
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Map<QName, XdmValue> params = new HashMap<>();
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for (Map.Entry<String, String> param : xsltParams.entrySet()) {
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params.put(new QName(param.getKey()), XdmValue.makeValue(param.getValue()));
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}
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transformer.setStylesheetParameters(params);
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}
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System.err.println("DEBUG: Running transformation...");
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System.err.flush();
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// Run transformation
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Serializer serializer = processor.newSerializer(new File(outputFo));
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transformer.transform(new StreamSource(new File(sourceXml)), serializer);
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System.err.println("DEBUG: Transformation completed successfully");
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System.err.flush();
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oldErr.println("DEBUG: Saxon transformation completed");
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oldErr.flush();
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// Send success response
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System.out.println("OK");
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System.out.flush();
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} catch (SaxonApiException e) {
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System.err.println("DEBUG: Saxon API exception: " + e.getClass().getName());
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System.err.flush();
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e.printStackTrace(System.err);
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} catch (SecurityException e) {
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// System.exit() was called by Saxon - treat as error
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System.setOut(oldOut);
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System.setErr(oldErr);
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oldErr.println("DEBUG: Saxon tried to call System.exit() (blocked)");
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oldErr.flush();
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// Check Saxon's output for error details
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String saxonOutput = saxonErr.toString();
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String errorMsg = "Transformation failed";
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if (!saxonOutput.isEmpty()) {
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errorMsg = saxonOutput.trim();
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// Limit error message length
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if (errorMsg.length() > 200) {
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errorMsg = errorMsg.substring(0, 200) + "...";
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}
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}
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System.out.println("ERROR: " + errorMsg);
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System.out.flush();
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} catch (Exception e) {
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System.setOut(oldOut);
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System.setErr(oldErr);
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oldErr.println("DEBUG: Saxon exception: " + e.getClass().getName());
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oldErr.flush();
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e.printStackTrace(oldErr);
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System.out.println("ERROR: " + (e.getMessage() != null ? e.getMessage() : e.getClass().getName()));
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System.out.flush();
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}
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} catch (Exception e) {
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System.err.println("DEBUG: Job processing exception: " + e.getClass().getName());
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System.err.flush();
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