*) added a few constraints to prevent exceptions when clicking on stop or pause on IndexCleaner_p.html when no thread is started

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2710 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/IndexCleaner_p.java

@@ -69,10 +69,10 @@ public class IndexCleaner_p {
                     urldbCleanerThread.endPause();
                 }
             }
-            else if (post.get("action").equals("ustop")) {
+            else if (post.get("action").equals("ustop") && (urldbCleanerThread!=null)) {
                 urldbCleanerThread.abort();
             }
-            else if (post.get("action").equals("upause")) {
+            else if (post.get("action").equals("upause") && (urldbCleanerThread!=null)) {
                 urldbCleanerThread.pause();
             }
             else if (post.get("action").equals("rstart")) {
@@ -84,10 +84,10 @@ public class IndexCleaner_p {
                     indexCleanerThread.endPause();
                 }
             }
-            else if (post.get("action").equals("rstop")) {
+            else if (post.get("action").equals("rstop") && (indexCleanerThread!=null)) {
                 indexCleanerThread.abort();
             }
-            else if (post.get("action").equals("rpause")) {
+            else if (post.get("action").equals("rpause") && (indexCleanerThread!=null)) {
                 indexCleanerThread.pause();
             }
             prop.put("LOCATION","");