add OutOfMemoryErrorUncaughtExceptionHandler

src/main/java/org/cobbzilla/util/system/OutOfMemoryErrorUncaughtExceptionHandler.java

@@ -0,0 +1,29 @@
+package org.cobbzilla.util.system;
+
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import static org.cobbzilla.util.daemon.ZillaRuntime.shortError;
+import static org.cobbzilla.util.daemon.ZillaRuntime.stacktrace;
+
+@AllArgsConstructor @Slf4j
+public class OutOfMemoryErrorUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
+
+    public static final OutOfMemoryErrorUncaughtExceptionHandler EXIT_ON_OOME = new OutOfMemoryErrorUncaughtExceptionHandler();
+
+    private final int status;
+
+    public OutOfMemoryErrorUncaughtExceptionHandler() { status = 2; }
+
+    @Override public void uncaughtException(Thread t, Throwable e) {
+        if (e instanceof OutOfMemoryError) {
+            try {
+                log.error("!!!!! OutOfMemoryError: calling System.exit("+status+") from: " + stacktrace(t));
+            } catch (Throwable ignored) {}
+            System.exit(status);
+        } else {
+            log.error("!!!!! Uncaught Exception: " + shortError(e));
+        }
+    }
+
+}