Larry McCay created KNOX-2224:
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Summary: KnoxLine and KnoxShell DataSource and Select Command
Alignment
Key: KNOX-2224
URL: https://issues.apache.org/jira/browse/KNOX-2224
Project: Apache Knox
Issue Type: Improvement
Components: KnoxShell
Reporter: Larry McCay
Assignee: Larry McCay
Fix For: 1.4.0
The KnoxLine shell environment datasource selection creates the connection for
the session. The connection is kept for the session or until datasource select
is used to create a connection to a new datasource. Each SQL query continues to
use the same connection. The connections are cleaned up and closed through a
shutdown hook for the KnoxLine environment.
In the interactive KnoxShell there are Custom Groovy Commands for datasource
management and SQL queries submission. The life of the connection is limited to
each command rather than being able to be used again in subsequent queries.
Connections are closed for each query. This requires a new connection and login
per query - since login isn't done at datasource selection time like it is in
KnoxLine.
This change aligns the two environments. Connections are managed at the shell
environment level rather than at the command level. Connections are created
when selecting datasources rather than and SQL query invocation. Connections
are cleaned up in the interactive shell through a shutdown hook.
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