aboutsummaryrefslogtreecommitdiff
path: root/src/main/java/at/gv/egiz/moazs/util
diff options
context:
space:
mode:
Diffstat (limited to 'src/main/java/at/gv/egiz/moazs/util')
-rw-r--r--src/main/java/at/gv/egiz/moazs/util/JAXBClassNotFoundFix.java55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/main/java/at/gv/egiz/moazs/util/JAXBClassNotFoundFix.java b/src/main/java/at/gv/egiz/moazs/util/JAXBClassNotFoundFix.java
new file mode 100644
index 0000000..9e72286
--- /dev/null
+++ b/src/main/java/at/gv/egiz/moazs/util/JAXBClassNotFoundFix.java
@@ -0,0 +1,55 @@
+package at.gv.egiz.moazs.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+import java.util.function.Supplier;
+
+import static at.gv.egiz.moazs.MoaZSException.moaZSException;
+
+@Component
+public class JAXBClassNotFoundFix {
+
+ private static final Logger log = LoggerFactory.getLogger(JAXBClassNotFoundFix.class);
+
+ /**
+ * Solves JAXB's "ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory" in Java >= 9
+ * by running func in a dedicated thread which has its context classloader replaced with a classloader that finds
+ * the ContextFactory.
+ *
+ * See https://sjhannah.com/blog/2018/11/21/jaxb-hell-on-jdk-9/
+ * Note: "runInTheadWithClassClassLoader" is not a typo.
+ * @param func function that is called in a dedicated thread.
+ * @param <A> return value of func.
+ * @return
+ */
+ public static <A> A runInTheadWithClassClassLoader(Supplier<A> func) {
+
+ final Object[] result = new Object[1];
+ final Exception[] error = new Exception[1];
+
+ Thread t = new Thread(() -> {
+ try {
+ result[0] = func.get();
+ } catch (Exception ex) {
+ error[0] = ex;
+ }
+ });
+
+ t.setContextClassLoader(JAXBClassNotFoundFix.class.getClassLoader());
+ t.start();
+
+ try {
+ t.join();
+ } catch (InterruptedException ex) {
+ log.error("Interrupted. ", ex);
+ }
+
+ if (error[0] != null) {
+ throw moaZSException("Could not run function.", error[0]);
+ }
+
+ return (A)result[0];
+ }
+}