RdbBucketDatabase (Yamcs :: Core 5.3.2 API)

java.lang.Object
- org.yamcs.yarch.rocksdb.RdbBucketDatabase

All Implemented Interfaces:

BucketDatabase
```
public class RdbBucketDatabase
extends Object
implements BucketDatabase
```
Stores users objects in rocksdb
Each bucket has associated a TablespaceRecord with the corresponding tbsIndex.
Each object in the bucket has an 4 bytes objectId
The rocksdb key is formed by either one of:
```
 4 bytes    1 byte             variable size
 tbsIndex   0 = bucket info
 tbsIndex   1 = metadata       objectName (up to 1000 bytes)
 tbsIndex   2 = data           objectId (4 bytes)
 
```
The rocksdb value is formed by:
- in case of metadata: protobuf representation of ObjectProperties (contains the objectId and key,value metadata)
- in case of user object: binary user object
To retrieve an object based on the bucket name and object name,
1. retrieve the tbsIndex based on the bucket name
2. retrieve the ObjectProperties based on the tbsIndex and object name
3. retrieve the object data based on the tbsIndex and objectId

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`RdbBucket`	`createBucket(String bucketName)`
`void`	`deleteBucket(String bucketName)`
`RdbBucket`	`getBucket(String bucketName)`	Retrieve a bucket handler from the database.
`List<Tablespace.BucketProperties>`	`listBuckets()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - createBucket
```
public RdbBucket createBucket(String bucketName)
                       throws IOException
```
    Specified by:
    
    createBucket in interface BucketDatabase
    
    Throws:
    
    IOException
  - getBucket
```
public RdbBucket getBucket(String bucketName)
```
    Description copied from interface: BucketDatabase
    
    Retrieve a bucket handler from the database.
    
    Specified by:
    
    getBucket in interface BucketDatabase
    
    Returns:
    
    the bucket with the given name or null if it does not exist
  - listBuckets
```
public List<Tablespace.BucketProperties> listBuckets()
```
    Specified by:
    
    listBuckets in interface BucketDatabase
  - deleteBucket
```
public void deleteBucket(String bucketName)
                  throws IOException
```
    Specified by:
    
    deleteBucket in interface BucketDatabase
    
    Throws:
    
    IOException