Changeset 101:7268c3ca025b in AnnotationManagerN4J for src/main/java/de/mpiwg/itgroup/annotations/neo4j/AnnotationStore.java

Timestamp:

Feb 13, 2015, 5:10:11 PM (9 years ago)

Author:

casties

Branch:

default

Message:

make admin ui view of all annotations scale better.

File:

• src/main/java/de/mpiwg/itgroup/annotations/neo4j/AnnotationStore.java (modified) (3 diffs)

src/main/java/de/mpiwg/itgroup/annotations/neo4j/AnnotationStore.java

@@ -62 +62 @@
 public class AnnotationStore {
 
-    protected static Logger logger = Logger.getLogger("de.mpiwg.itgroup.annotations.neo4j.AnnotationStore");
+    protected static Logger logger = Logger.getLogger(AnnotationStore.class.getCanonicalName());
 
     protected GraphDatabaseService graphDb;
@@ -257 +257 @@
 
     /**
+     * Returns the total number of Annotations.
+     * 
+     * @return number of annotations
+     */
+    public int getAnnotationCount() {
+        int num = -1;
+        Index<Node> idx = getNodeIndex(NodeTypes.ANNOTATION);
+        try (Transaction tx = graphDb.beginTx()) {
+            IndexHits<Node> annotNodes = idx.query("id", "*");
+            num = annotNodes.size();
+            tx.success();
+        }
+        return num;
+    }
+    
+    /**
      * Returns List of Annotations. Key has to be indexed.
      * 
      * @param key
      * @param query
-     * @return
-     */
-    public List<Annotation> getAnnotations(String key, String query) {
+     * @param limit 
+     * @param offset 
+     * @return
+     */
+    public List<Annotation> getAnnotations(String key, String query, int limit, int offset) {
+        long ts = System.currentTimeMillis();
         ArrayList<Annotation> annotations = new ArrayList<Annotation>();
         Index<Node> idx = getNodeIndex(NodeTypes.ANNOTATION);
@@ -272 +291 @@
         try (Transaction tx = graphDb.beginTx()) {
             IndexHits<Node> annotNodes = idx.query(key, query);
+            int cnt = 0;
+            int max = offset + limit;
             for (Node annotNode : annotNodes) {
+                cnt += 1;
+                if (cnt < offset) continue;
                 Annotation annotation = createAnnotationFromNode(annotNode);
                 annotations.add(annotation);
-            }
-            tx.success();
-        }
+                if (limit > 0 && cnt >= max) {
+                    annotNodes.close();
+                    break;
+                }
+            }
+            tx.success();
+        }
+        logger.finer("got "+annotations.size()+" annotations in "+(System.currentTimeMillis()-ts)+"ms");
         return annotations;
     }