Field Re-Indexing: display list of fields in reindex queue

change servlet to display statistic on 1st click (instead after refresh)

htroot/IndexReIndexMonitor_p.html

@@ -11,12 +11,13 @@
         <h2>Field Re-Indexing</h2>
         <p>In case that an index schema has changed, all documents with missing field entries can be indexed again with a reindex job.</p>
         <form action="IndexReIndexMonitor_p.html" method="post" enctype="multipart/form-data" accept-charset="UTF-8">
+          <table><tr valign="top"><td>
             <fieldset>                 
                 <table>
                     <tr>
                         <td>Documents in current queue</td>
                         <td>#[querysize]#</td>
-                        <td>#(showstartbutton)#<input type="submit" value="refresh page"/>::#(/showstartbutton)#</td>
+                        <td>#(reindexjobrunning)#::<input type="submit" value="refresh page"/>#(/reindexjobrunning)#</td>
                     </tr>
                     <tr>
                         <td>Documents processed</td>
@@ -34,12 +35,20 @@
                         <td></td>
                     </tr>                    
                 </table>
-                #(showstartbutton)#
-                <input type="submit" name="stopreindex" value="stop reindexing"/>
-                ::<input type="submit" name="reindexnow" value="start reindex job now"/>
-                #(/showstartbutton)#
+                #(reindexjobrunning)#                
+                <input type="submit" name="reindexnow" value="start reindex job now"/>
+                ::<input type="submit" name="stopreindex" value="stop reindexing"/>
+                #(/reindexjobrunning)# 
                 <p class="info">#[infomessage]#</p>                            
             </fieldset>
+          </td><td>
+            #(reindexjobrunning)#::
+            <fieldset><legend>Remaining field list</legend>
+              <p>reindex documents containing these fields: </p>
+              <p>#[fieldlist]#</p>
+            </fieldset>
+            #(/reindexjobrunning)#
+          </td></tr></table>
         </form>    
         #%env/templates/footer.template%#
     </body>

htroot/IndexReIndexMonitor_p.java

@@ -36,34 +36,49 @@ public class IndexReIndexMonitor_p {
         prop.put("docsprocessed", "0");
         prop.put("currentselectquery","");
         BusyThread bt = sb.getThread("reindexSolr");
+        if (bt == null) {
+            if (post != null && post.containsKey("reindexnow") && sb.index.fulltext().connectedLocalSolr()) {
+                migration.reindexToschema(sb);
+                prop.put("querysize", "0");
+                prop.put("infomessage","reindex job started");
+                
+                bt = sb.getThread("reindexSolr"); //get new created job for following posts
+            }          
+        }
+        
         if (bt != null) {
+            prop.put("reindexjobrunning", 1);
             prop.put("querysize", bt.getJobCount());
 
             if (bt instanceof ReindexSolrBusyThread) {                
                 prop.put("docsprocessed", ((ReindexSolrBusyThread) bt).getProcessed());
                 prop.put("currentselectquery","q="+((ReindexSolrBusyThread) bt).getCurrentQuery());
+                // prepare list of fields in queue
+                final String[] querylist = ((ReindexSolrBusyThread) bt).getQueryList();
+                if (querylist != null) {
+                    String allfieldnames = "";
+                    for (String oneqs : querylist) { // just use fieldname from query (fieldname:[* TO *])
+                        allfieldnames = allfieldnames + oneqs.substring(0, oneqs.indexOf(':')) + "<br> ";
+                    }
+                    prop.put("reindexjobrunning_fieldlist", allfieldnames);
+                } else {
+                    prop.put("reindexjobrunning_fieldlist", "");
+                }
             }
             
             if (post != null && post.containsKey("stopreindex")) {
                 sb.terminateThread("reindexSolr", false);
                 prop.put("infomessage", "reindex job stopped");
-                prop.put("showstartbutton", 1);
+                prop.put("reindexjobrunning",0);
             } else {
                 prop.put("infomessage", "reindex is running");
-                prop.put("showstartbutton", 0);
             }            
         } else {
-            if (post != null && post.containsKey("reindexnow") && sb.index.fulltext().connectedLocalSolr()) {
-                migration.reindexToschema(sb);
-                prop.put("showstartbutton", 0);
-                prop.put("querysize", "0");
-                prop.put("infomessage","reindex job started");
-            } else {
-                prop.put("showstartbutton", 1);
+            prop.put("reindexjobrunning", 0);
+
             prop.put("querysize", "is empty");
             prop.put("infomessage", "no reindex job running");
         }
-        }
         // return rewrite properties
         return prop;
     }

source/net/yacy/search/index/ReindexSolrBusyThread.java

@@ -175,6 +175,18 @@ import org.apache.solr.common.SolrInputDocument;
             return querylist.isEmpty() ? "" : querylist.get(0);
         }
 
+        /**          
+         * @return copy of all Solr select queries in the queue or null if empty
+         */
+        public String[] getQueryList() {
+            if (querylist != null) {
+                String[] list = new String[querylist.size()];
+                list = querylist.toArray(list);
+                return list;
+            }
+            return null;
+        }
+        
         /**
          * @return number of currently selected (found) documents
          */