abort plotting on dashboards

pdb-api/src/main/java/org/lucares/pdb/api/AbortException.java

@@ -1,5 +1,7 @@
 package org.lucares.pdb.api;
 
+import java.util.concurrent.TimeUnit;
+
 public class AbortException extends RuntimeException {
 
     private static final long serialVersionUID = 7614132985675048490L;
@@ -29,4 +31,18 @@ public class AbortException extends RuntimeException {
         }
     }
 
+    public static void sleepAbortibly(final long millis) throws AbortException {
+        final long deadline = System.currentTimeMillis() + millis;
+
+        while (System.currentTimeMillis() < deadline) {
+            try {
+                TimeUnit.MILLISECONDS.sleep(Math.min(10, deadline - System.currentTimeMillis()));
+            } catch (final InterruptedException e) {
+                Thread.currentThread().interrupt();
+                throw new AbortException();
+            }
+            AbortException.abortIfInterrupted();
+        }
+    }
+
 }