DbCleanup (starrocks-bdb-je 18.3.17 API)

```
public class DbCleanup
extends Object
```
Store information about a DatabaseImpl that will have to be deleted or updated at transaction commit or abort. This handles cleanup after operations like Environment.truncateDatabase, removeDatabase and renameDatabase. Cleanup like this is done outside the usual transaction commit or node undo processing, because the mapping tree is always auto-committed to avoid deadlock and is essentially non-transactional.

Nested Classes
Modifier and Type	Class and Description
`static class`	`DbCleanup.Action`

Fields
Modifier and Type	Field and Description
`static TestHook`	`modifyDbRootHook`

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object obj)` Make sure that a set of DbCleanup only has one entry per databaseImpl/action tuple.
`static void`	`execute(EnvironmentImpl envImpl, DbCleanup[] cleanupArray, boolean isCommit)` Perform and complete the cleanup task _after_ the txn's write locks have been released.
`int`	`hashCode()`
`static void`	`setState(DbCleanup cleanup, boolean isCommit)` Do any preparation needed for a cleanup task _before_ the txn's write locks have been released.
`static void`	`setStateAndExecute(EnvironmentImpl envImpl, DbCleanup cleanup)` Process cleanup task when a non-transactional DB operation is complete (meaning that the NameLN was logged).

public static TestHook modifyDbRootHook

public static void execute(EnvironmentImpl envImpl,
                           DbCleanup[] cleanupArray,
                           boolean isCommit)

Perform and complete the cleanup task _after_ the txn's write locks have been released.

public static void setStateAndExecute(EnvironmentImpl envImpl,
                                      DbCleanup cleanup)

Process cleanup task when a non-transactional DB operation is complete (meaning that the NameLN was logged).

Class DbCleanup