HDDS-15730. Support more StatefulService types in DBScanner

[adoroszlai]

What changes were proposed in this pull request?

Refactor SCM StatefulService to allow using its static metadata (name, parser) without instantiating the service or duplicating code in DBScanner.

Add support for Container Balancer and Root CA Rotation Manager services in DBScanner.

https://issues.apache.org/jira/browse/HDDS-15730

How was this patch tested?

$ ozone admin containerbalancer start
Container Balancer started successfully.

$ ozone debug ldb --db=/data/metadata/scm.db scan --cf=statefulServiceConfig
{ "ContainerBalancer": {
  "memoizedHashCode" : 0,
  "memoizedSize" : -1,
  "unknownFields" : {
    "fields" : { }
  },
  "bitField0_" : 262143,
  "utilizationThreshold_" : {
    "hash" : 0,
    "bytes" : "MTA="
  },
  "datanodesInvolvedMaxPercentagePerIteration_" : 20,
  "sizeMovedMaxPerIteration_" : 536870912000,
  "sizeEnteringTargetMax_" : 27917287424,
  "sizeLeavingSourceMax_" : 27917287424,
  "iterations_" : 10,
  "excludeContainers_" : {
    "hash" : 0,
    "bytes" : ""
  },
  "moveTimeout_" : 3900000,
  "balancingIterationInterval_" : 4200000,
  "includeDatanodes_" : {
    "hash" : 0,
    "bytes" : ""
  },
  "excludeDatanodes_" : {
    "hash" : 0,
    "bytes" : ""
  },
  "moveNetworkTopologyEnable_" : false,
  "triggerDuBeforeMoveEnable_" : false,
  "shouldRun_" : false,
  "nextIterationIndex_" : 0,
  "moveReplicationTimeout_" : 3000000,
  "includeContainers_" : {
    "hash" : 0,
    "bytes" : ""
  },
  "includeNonStandardContainers_" : false,
  "memoizedIsInitialized" : 1
}
 }

https://github.com/adoroszlai/ozone/actions/runs/28643243287

[jojochuang]

@sreejasahithi

[sreejasahithi]

Thanks @adoroszlai for the PR.

[sreejasahithi]

SERVICE_DEFINITION here should use DeletedBlocksTransactionSummary, not DeletedBlocksTransaction:

Suggested change

	public static final StatefulServiceDefinition<DeletedBlocksTransaction> SERVICE_DEFINITION =
	new StatefulServiceDefinition<>(SERVICE_NAME, DeletedBlocksTransaction.parser());
	public static final StatefulServiceDefinition<DeletedBlocksTransactionSummary> SERVICE_DEFINITION =
	new StatefulServiceDefinition<>(SERVICE_NAME, DeletedBlocksTransactionSummary.parser());

The old DBScanner also parsed it as DeletedBlocksTransactionSummary.

[adoroszlai]

Thanks for spotting this. The other two definitions are used with subclasses of StatefulService, which ensures type safety. I don't know why this one is different, but now made some further change: use the definition in loadDeletedBlocksSummary(), which returns DeletedBlocksTransactionSummary, so that type mismatch is caught at compile time.

[sreejasahithi]

LGTM