Package org.yamcs.yarch.rocksdb

Class RdbBucketDatabase

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