[jira] [Commented] (CASSANDRA-5625) Cleanup Tracing class

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-5625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13679057#comment-13679057 ] 

Jonathan Ellis commented on CASSANDRA-5625:
-------------------------------------------

bq. StorageService has a Tracing.instance() call - it should trace something or can be removed?

The docstring suggests (incorrectly) that the instance is lazily initialized; my guess is this was a way to force initialization.

{code}
    /**
     * Fetches and lazy initializes the trace context.
     */
    public static Tracing instance()
    {
        return instance;
    }
{code}
                
> Cleanup Tracing class
> ---------------------
>
>                 Key: CASSANDRA-5625
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5625
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Mikhail Mazursky
>            Priority: Trivial
>         Attachments: trunk-5625.patch
>
>
> 1. Tracing instance cannot be null because it's initialized at classloading time and never changes. Made it final to prove that. Removed all redundant null checks.
> 2. StorageService has a Tracing.instance() call - it should trace something or can be removed?
> 3. Made sessions a ConcurrentMap to stress that it should be thread-safe.

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