[BZ-1035338] add timeout for UrlConnection in UrlResource

(cherry picked from commit 470a882)

drools-core/src/main/java/org/drools/core/io/impl/UrlResource.java

@@ -67,6 +67,10 @@ public class UrlResource extends BaseResource
     private String              username                 = "";
     private String              password                 = "";
 
+    private static final String DROOLS_RESOURCE_URLTIMEOUT = "drools.resource.urltimeout";
+    private static final int DEFAULT_TIMEOUT = 10000; // 10 seconds
+    private static final int TIMEOUT = initTimeout();
+
     public UrlResource() {
 
     }
@@ -210,8 +214,15 @@ private void cacheStream() {
         }
     }
 
+    private URLConnection openURLConnection(URL url) throws IOException {
+        URLConnection con = url.openConnection();
+        con.setConnectTimeout(TIMEOUT);
+        con.setReadTimeout(TIMEOUT);
+        return con;
+    }
+
     private InputStream grabStream() throws IOException {
-        URLConnection con = this.url.openConnection();
+        URLConnection con = openURLConnection(this.url);
         con.setUseCaches(false);
 
         if (con instanceof HttpURLConnection) {
@@ -293,7 +304,7 @@ private long grabLastMod() throws IOException {
             File file = getFile();
             return file.lastModified();
         } else {
-            URLConnection conn = getURL().openConnection();
+            URLConnection conn = openURLConnection(getURL());
             if (conn instanceof HttpURLConnection) {
                 ((HttpURLConnection) conn).setRequestMethod("HEAD");
                 if ("enabled".equalsIgnoreCase(basicAuthentication)) {
@@ -386,4 +397,12 @@ private static File getCacheDir() {
             return new File(root);
         }
     }
+
+    private static int initTimeout() {
+        try {
+            return Integer.parseInt(System.getProperty( DROOLS_RESOURCE_URLTIMEOUT ));
+        } catch (Exception e) {
+            return DEFAULT_TIMEOUT;
+        }
+    }
 }