From 284e833244fe5178e4dece2e46bc62d3578bc0e1 Mon Sep 17 00:00:00 2001
From: Matthieu Baechler <matthieu@apache.org>
Date: Wed, 20 Mar 2019 09:00:24 +0100
Subject: [PATCH] JAMES-2695 EventCollector has to be thread-safe

---
 .../org/apache/james/mailbox/util/EventCollector.java     | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mailbox/api/src/test/java/org/apache/james/mailbox/util/EventCollector.java b/mailbox/api/src/test/java/org/apache/james/mailbox/util/EventCollector.java
index 58908c4486b..80d0d97049c 100644
--- a/mailbox/api/src/test/java/org/apache/james/mailbox/util/EventCollector.java
+++ b/mailbox/api/src/test/java/org/apache/james/mailbox/util/EventCollector.java
@@ -19,8 +19,8 @@
 
 package org.apache.james.mailbox.util;
 
-import java.util.ArrayList;
-import java.util.List;
+import java.util.Collection;
+import java.util.concurrent.ConcurrentLinkedDeque;
 
 import org.apache.james.mailbox.events.Event;
 import org.apache.james.mailbox.events.Group;
@@ -31,14 +31,14 @@ public static class EventCollectorGroup extends Group {}
 
     private static final Group GROUP = new EventCollectorGroup();
 
-    private final List<Event> events = new ArrayList<>();
+    private final ConcurrentLinkedDeque<Event> events = new ConcurrentLinkedDeque<>();
 
     @Override
     public Group getDefaultGroup() {
         return GROUP;
     }
 
-    public List<Event> getEvents() {
+    public Collection<Event> getEvents() {
         return events;
     }