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Posted to commits@cassandra.apache.org by "Tatu Saloranta (Jira)" <ji...@apache.org> on 2021/09/03 16:25:00 UTC

[jira] [Commented] (CASSANDRA-16855) Replace minor use of `json-simple` with Jackson

    [ https://issues.apache.org/jira/browse/CASSANDRA-16855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17409595#comment-17409595 ] 

Tatu Saloranta commented on CASSANDRA-16855:
--------------------------------------------

One possibility, too, would be for me to split changes into 2 (or if need be, more) PRs, starting with safest ones (adding missing test). This would make sense if someone with a better idea of hotspots/-paths could suggest split. More important change(s) should then be merged with a jmh test (or tests), or validated with load/stress-test for overall change (likely none measurable at high level).

> Replace minor use of `json-simple` with Jackson
> -----------------------------------------------
>
>                 Key: CASSANDRA-16855
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16855
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Dependencies, Local/Other, Tool/nodetool
>            Reporter: Tatu Saloranta
>            Assignee: Tatu Saloranta
>            Priority: Normal
>              Labels: pull-request-available
>             Fix For: 4.x
>
>
> Jackson library is used for most JSON reading/writing, but there are couple of places where older "json-simple" library is used, mostly for diagnostics output. Replacing those minor usages would allow removal of a dependency, one for which the last release was made in 2012.
> Places where json-simple is used are:
>  * src/java/org/apache/cassandra/db/ColumnFamilyStore.java
>  * src/java/org/apache/cassandra/db/commitlog/CommitLogDescriptor.java
>  * src/java/org/apache/cassandra/hints/HintsDescriptor.java
>  * src/java/org/apache/cassandra/tools/nodetool/stats/StatsPrinter.java
> (and some matching usage in couple of test classes)
> I can take a stab at replacing these uses; it also looks like test coverage may be spotty for some (StatsPrinter json/yaml part has no tests for example).
> It is probably best to target this for "trunk" (4.1?).
>  



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