Merge from 6.3 to 6.4

svn changeset:13516/svn branch:6.4

1 files changed, 20 insertions, 18 deletions

diff --git a/src/com/vaadin/terminal/gwt/server/AbstractWebApplicationContext.java b/src/com/vaadin/terminal/gwt/server/AbstractWebApplicationContext.java
index bcac87e6ad..92488ef9ca 100644
--- a/src/com/vaadin/terminal/gwt/server/AbstractWebApplicationContext.java
+++ b/src/com/vaadin/terminal/gwt/server/AbstractWebApplicationContext.java
@@ -3,22 +3,22 @@
  */
 package com.vaadin.terminal.gwt.server;

 

-import java.io.PrintWriter;

-import java.io.Serializable;

-import java.io.StringWriter;

-import java.net.URL;

-import java.util.Collection;

-import java.util.Collections;

-import java.util.HashMap;

-import java.util.HashSet;

-import java.util.LinkedList;

-

-import javax.servlet.http.HttpSessionBindingEvent;

-import javax.servlet.http.HttpSessionBindingListener;

-

-import com.vaadin.Application;

-import com.vaadin.service.ApplicationContext;

-import com.vaadin.terminal.ApplicationResource;

+import java.io.PrintWriter;
+import java.io.Serializable;
+import java.io.StringWriter;
+import java.net.URL;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+
+import javax.servlet.http.HttpSessionBindingEvent;
+import javax.servlet.http.HttpSessionBindingListener;
+
+import com.vaadin.Application;
+import com.vaadin.service.ApplicationContext;
+import com.vaadin.terminal.ApplicationResource;
 

 /**

  * Base class for web application contexts (including portlet contexts) that

@@ -36,8 +36,10 @@ public abstract class AbstractWebApplicationContext implements
 

     protected HashMap<Application, AbstractCommunicationManager> applicationToAjaxAppMgrMap = new HashMap<Application, AbstractCommunicationManager>();

 

-    public void addTransactionListener(TransactionListener listener) {

-        listeners.add(listener);

+    public void addTransactionListener(TransactionListener listener) {
+        if (listener != null) {
+            listeners.add(listener);
+        }

     }

 

     public void removeTransactionListener(TransactionListener listener) {