drill

7c373232 - DRILL-8155: Introduce New Plugin Authentication Modes (#2516)

DRILL-8155: Introduce New Plugin Authentication Modes (#2516) * Do not set the read-only hint on JDBC connections. * Outline of different auth modes in storage-jdbc. In this commit, a new `authMode` storage config supporting three new auth modes is defined: shared user (default), user translation (user is translated to some other user from the external storage) and impersonation (the external storage and JDBC driver provide support for impersonating the Drill query user). The JdbcStoragePlugin is enhanced to be able to work with a lookup table of connection pools, where a pool is dedicated to each query user except when in shared user auth mode. Planning and execution time APIs are also enhanced to transmit a user credentials object for the query user, instead of just its username. This allows for the expansion of the UserCredentials protobuf type to include some optional extra credentials, e.g. in an array of byte arrays. These credentials may be relevant in the user tranlsation mode when a credential provider must be accessed in order to obtain the creds to be used for the external system. * Rebased to current master and build fixes * Build works, cred stuff added * Credentials being saved and pushed down to storage plugin * UI now closing properly * User Translation working for HTTP plugin * HTTP unit tests passing * WIP * Fixed import * User Credentials now being stored in credential provider * Working * Fixed TPCH Unit Tests * Fix CredProvider SerDe Test * Added unit tests for JDBC * Code cleanup * Fix LGTM alerts * Correct username now populating Group Scan * Username to Subscan * Remove PerUserUsernamePasswordCredentials class. * Remove getUserCredentials from CredentialsProvider. * Planning errors fixed * Removed unused imports * Fixed minor issues * Unit test fixes * WIP. * Fix CodeQL Alert * Ignore LGTM False Positive * Fix tainted string LGTM alert * Revert LGTM Comment * Addressed review comments * Use fixed size Guava caches in JDBC convetion and dialect factories. These replace Maps with no size limit that might have grown without bound. LRU eviction begins when the cache size limit is reached. * Add a TTL to the JDBC dialect and convention caches. Co-authored-by: James Turton <james@somecomputer.xyz>