[jira] [Updated] (CASSANDRA-16378) Expose application_name and application_version in virtual table system_views.clients

["Tibor Repasi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tibor Repasi updated CASSANDRA-16378:
-------------------------------------
    Component/s: Tool/nodetool

> Expose application_name and application_version in virtual table system_views.clients
> -------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-16378
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16378
>             Project: Apache Cassandra
>          Issue Type: Improvement
>          Components: Feature/Virtual Tables, Tool/nodetool
>            Reporter: Tibor Repasi
>            Assignee: Tibor Repasi
>            Priority: Normal
>              Labels: AdventCalendar2021, gsoc2021, lhf, mentor
>             Fix For: 4.1-alpha1, 4.1
>
>          Time Spent: 3h
>  Remaining Estimate: 0h
>
> Recent java-driver's [com.datastax.oss.driver.api.core.session.SessionBuilder|https://docs.datastax.com/en/drivers/java/4.9/com/datastax/oss/driver/api/core/session/SessionBuilder.html] respects properties [ApplicationName|https://docs.datastax.com/en/drivers/java/4.9/com/datastax/oss/driver/api/core/session/SessionBuilder.html#withApplicationName-java.lang.String-] and [ApplicationVersion|https://docs.datastax.com/en/drivers/java/4.9/com/datastax/oss/driver/api/core/session/SessionBuilder.html#withApplicationVersion-java.lang.String-].
> It would be helpful to expose this information via virtual table {{system_views.clients}} and with {{{}nodetool clientstats{}}}.
> +Additional information for newcomers:+
> The drivers can send as part of the {{STARTUP MESSAGE}} the {{APPLICATION_NAME}} and {{APPLICATION_VERSION}} options. Two new volatile fields {{applicationName}} and {{applicationVersion}} need to be added to {{ClientState}} in a similar way to {{driverName}} and {{{}driverVersion{}}}.
> The {{APPLICATION_NAME}} and {{APPLICATION_VERSION}} options need to be retrieved in {{StartupMessage#execute}} and passed to the {{{}ClientState{}}}. 
> The new {{application_name}} and {{application_version}} columns need to be added to the {{system_views.clients}} represented by the {{ClientsTable}} class. The data then need to be retrieved from the {{ClientState}} through {{{}ConnectedClient{}}}.
> Some unit tests similat to {{SettingsTableTest}} should be added.



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