shard

Hi community,

I found shardingsphere-db-discovery-mgr module need to add unit test. it 's task list :

• MGRDatabaseDiscoveryType.startPeriodicalUpdate()
• MGRDatabaseDiscoveryType.updateProperties()

Scenario:

• Single vttablet, connecting to external MySQL (happens to be RDS Aurora, but I doubt it matters).
• Single unsharded keyspace (keyspace3), no vschema, with a single table, containing a single row
• Test program using the Python pymysql driver, using the CLIENT.FOUND_ROWS flag, and updating a single row to it's current key value (i.e. no rows are updated, but a single row

When an OAuth 2.0 client makes a request to the resource server, the resource server needs some way to verify the access token. The OAuth 2.0 core spec doesn’t define a specific method of how the resource server should verify access tokens, just mentions that it requires coordination between the resource and authorization servers. In some cases, especially with small services, both endpoints are p