Fix for ALF-2329: Parameter to automatically remove the existing index directories before doing a FULL re-index

- full reindex now deletes any existing DM and AVM indexes
- the index directory is tidied up int eh backround which may take some time
- includes fix to check async snapshots are in the index (it was checking sync twice ...)

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@19922 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/search/IndexerComponent.java

@@ -21,6 +21,7 @@ package org.alfresco.repo.search;
 import org.alfresco.repo.service.StoreRedirectorProxyFactory;
 import org.alfresco.service.cmr.repository.ChildAssociationRef;
 import org.alfresco.service.cmr.repository.NodeRef;
+import org.alfresco.service.cmr.repository.StoreRef;
 import org.springframework.extensions.surf.util.AbstractLifecycleBean;
 import org.springframework.context.ApplicationEvent;
 
@@ -102,4 +103,13 @@ public class IndexerComponent extends AbstractLifecycleBean implements Indexer
         indexer.deleteChildRelationship(relationshipRef);
     }
 
+    /* (non-Javadoc)
+     * @see org.alfresco.repo.search.Indexer#deleteIndex(org.alfresco.service.cmr.repository.StoreRef)
+     */
+    public void deleteIndex(StoreRef storeRef)
+    {
+        Indexer indexer = indexerAndSearcherFactory.getIndexer(storeRef);
+        indexer.deleteIndex(storeRef);
+    }
+
 }