AndrewJSchofield commented on code in PR #16513:
URL: https://github.com/apache/kafka/pull/16513#discussion_r1663821656
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server/src/main/java/org/apache/kafka/server/share/ShareSessionCache.java:
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@@ -41,10 +41,10 @@ public class ShareSessionCache {
private long numPartitions = 0;
// A map of session key to ShareSession.
- private Map<ShareSessionKey, ShareSession> sessions = new HashMap<>();
+ private final Map<ShareSessionKey, ShareSession> sessions = new
HashMap<>();
// Maps last used times to sessions.
- private TreeMap<LastUsedKey, ShareSession> lastUsed = new TreeMap<>();
+ private final TreeMap<LastUsedKey, ShareSession> lastUsed = new
TreeMap<>();
// Visible for testing
public synchronized TreeMap<LastUsedKey, ShareSession> lastUsed() {
Review Comment:
This seems a bit odd. This method exposes the TreeMap for testing, which
breaks encapsulation and surely risks synchronization problems if used for
anything other than testing. So, is there any point in the method being
declared synchronized? Accessing the TreeMap in the caller is not going to be
synchronized.
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