[tomcat] branch 9.0.x updated: Additional comment to explain choice of LinkedList

[ma...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

markt pushed a commit to branch 9.0.x
in repository https://gitbox.apache.org/repos/asf/tomcat.git


The following commit(s) were added to refs/heads/9.0.x by this push:
     new 22cd0726f5 Additional comment to explain choice of LinkedList
22cd0726f5 is described below

commit 22cd0726f5d629a79d9e886fe7daf01142438396
Author: Mark Thomas <ma...@apache.org>
AuthorDate: Wed Oct 5 18:01:49 2022 +0100

    Additional comment to explain choice of LinkedList
---
 java/org/apache/catalina/session/ManagerBase.java | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/java/org/apache/catalina/session/ManagerBase.java b/java/org/apache/catalina/session/ManagerBase.java
index 7b9ab5042d..d0af97df23 100644
--- a/java/org/apache/catalina/session/ManagerBase.java
+++ b/java/org/apache/catalina/session/ManagerBase.java
@@ -120,11 +120,9 @@ public abstract class ManagerBase extends LifecycleMBeanBase implements Manager
 
     protected static final int TIMING_STATS_CACHE_SIZE = 100;
 
-    protected final Deque<SessionTiming> sessionCreationTiming =
-            new LinkedList<>();
-
-    protected final Deque<SessionTiming> sessionExpirationTiming =
-            new LinkedList<>();
+    // Use LinkedList as the Deques are initialised by filling with null
+    protected final Deque<SessionTiming> sessionCreationTiming = new LinkedList<>();
+    protected final Deque<SessionTiming> sessionExpirationTiming = new LinkedList<>();
 
     /**
      * Number of sessions that have expired.


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