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https://issues.apache.org/jira/browse/CASSANDRA-16378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17463328#comment-17463328
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Tibor Repasi edited comment on CASSANDRA-16378 at 12/21/21, 4:16 PM:
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Solved the above. My remaining question on that is, what is MultiCell and why
is it needed to be false?
Have updated the PR. Now, you can query the following:
{code}
superuser@cqlsh> SELECT address, port, client_options FROM system_views.clients;
address | port | client_options
-----------+-------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
127.0.0.1 | 49172 | {'APPLICATION_NAME': 'TestApp', 'APPLICATION_VERSION':
'1.2.3', 'CLIENT_ID': '79572fc6-8a05-419d-b53a-073d03d601e7', 'CQL_VERSION':
'3.0.0', 'DRIVER_NAME': 'DataStax Java driver for Apache Cassandra(R)',
'DRIVER_VERSION': '4.13.0'}
127.0.0.1 | 49173 | {'APPLICATION_NAME': 'TestApp', 'APPLICATION_VERSION':
'1.2.3', 'CLIENT_ID': '79572fc6-8a05-419d-b53a-073d03d601e7', 'CQL_VERSION':
'3.0.0', 'DRIVER_NAME': 'DataStax Java driver for Apache Cassandra(R)',
'DRIVER_VERSION': '4.13.0'}
127.0.0.1 | 64951 |
{'CQL_VERSION': '3.4.5', 'DRIVER_NAME': 'DataStax Python Driver',
'DRIVER_VERSION': '3.25.0'}
127.0.0.1 | 64953 |
{'CQL_VERSION': '3.4.5', 'DRIVER_NAME': 'DataStax Python Driver',
'DRIVER_VERSION': '3.25.0'}
(4 rows)
{code}
was (Author: rtib):
Solved the above. My remaining question on that is, what is MultiCell and why
is it needed to be false?
Have updated the PR. Now, you can query the following:
{code}
superuser@cqlsh> SELECT address, port, client_options FROM system_views.clients;
address | port | client_options
-----------+-------+-----------------------------------------------------------------------------------------------
127.0.0.1 | 64951 | {'CQL_VERSION': '3.4.5', 'DRIVER_NAME': 'DataStax Python
Driver', 'DRIVER_VERSION': '3.25.0'}
127.0.0.1 | 64953 | {'CQL_VERSION': '3.4.5', 'DRIVER_NAME': 'DataStax Python
Driver', 'DRIVER_VERSION': '3.25.0'}
(2 rows)
{code}
> 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: Cassandra
> Issue Type: Improvement
> Components: Feature/Virtual Tables
> Reporter: Tibor Repasi
> Assignee: Tibor Repasi
> Priority: Normal
> Labels: AdventCalendar2021, gsoc2021, lhf, mentor
>
> 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 exposed 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. To 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}} optionsneed 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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