From 7e7f5169cbba419822c4fd7e05a85e81972a9fd6 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Orsini <orsinije@fr.ibm.com>
Date: Fri, 3 Nov 2017 00:16:05 +0100
Subject: [PATCH] do classification in //

---
 war/src/main/java/pnews/NER.java | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/war/src/main/java/pnews/NER.java b/war/src/main/java/pnews/NER.java
index 3a6fc82..bcb8951 100644
--- a/war/src/main/java/pnews/NER.java
+++ b/war/src/main/java/pnews/NER.java
@@ -12,10 +12,16 @@ import edu.stanford.nlp.util.Triple;
 /** https://stanfordnlp.github.io/CoreNLP/api.html */
 public class NER {
         private static final String CLASS_NAME = NER.class.getName();
-        private static final Logger LOG = Logger.getLogger(CLASS_NAME); 
+        private static final Logger LOG = Logger.getLogger(CLASS_NAME);
+        private static final ThreadLocal<CRFClassifier<CoreLabel>> classifier = new ThreadLocal<CRFClassifier<CoreLabel>>() {
+                @Override 
+                protected CRFClassifier<CoreLabel> initialValue() {
+                        return CRFClassifier.getDefaultClassifier();
+                }
+        };
         
         public static List<String> classify(String str, List<String> entities) throws ClassCastException, ClassNotFoundException, IOException {
-                final CRFClassifier<CoreLabel> classifier = CRFClassifier.getDefaultClassifier();
+                
                 List<Triple<String, Integer, Integer>> triples;
                 String w;
                 final String FUNCTION_NAME = "classify";                       
@@ -25,7 +31,7 @@ public class NER {
                 OpenNLP.classify(str, entities);
                                 
                 synchronized (classifier) {
-                        triples = classifier.classifyToCharacterOffsets(str);
+                        triples = classifier.get().classifyToCharacterOffsets(str);
                         for (Triple<String, Integer, Integer> t: triples) {
                                 w = str.substring(t.second, t.third);
                                 if (!entities.contains(w))
-- 
2.7.4