From d4dc04d702767d6f6f59eba4849814f6a76a3d62 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Orsini <orsinije@fr.ibm.com>
Date: Mon, 16 Oct 2017 22:19:26 +0200
Subject: [PATCH] fixed concurent exception when the list of articles is
 updated and requested

---
 war/src/main/java/pnews/servlet/ArticleProvider.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/war/src/main/java/pnews/servlet/ArticleProvider.java b/war/src/main/java/pnews/servlet/ArticleProvider.java
index 4912469..55e098a 100644
--- a/war/src/main/java/pnews/servlet/ArticleProvider.java
+++ b/war/src/main/java/pnews/servlet/ArticleProvider.java
@@ -45,8 +45,7 @@ public class ArticleProvider {
                 r = new XmlReader(new URL(u));
                 XmlReader.setDefaultEncoding("UTF-8");
                 
-                return new SyndFeedInput().build(r);
-                
+                return new SyndFeedInput().build(r);                
         }
         
         private static Map<Category, String[]> getFeeds() {
@@ -198,10 +197,13 @@ public class ArticleProvider {
                         LOG.severe("No feed for category " + cat);
         }
         
+        /**
+         * Returns a copy.
+         */
         public List<Article> getArticles(Category cat)
                         throws IllegalArgumentException, MalformedURLException, FeedException, IOException {
                 synchronized (articlesByCategory) {
-                        return articlesByCategory.get(cat);
+                        return new ArrayList<>(articlesByCategory.get(cat));
                 }
         }
         
-- 
2.7.4