trait DurablePersistentMap[T <: Txn[T], K] extends AnyRef
Interface for a confluently or partially persistent storing key value map. Keys (type K) might
be single object identifiers (as the variable storage case), or combined keys
(as in the live map case).
- T
the underlying system's transaction type
- K
the key type
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- abstract def get[A](key: K, tx: T)(implicit path: T.Acc, format: TFormat[T, A]): Option[A]
Finds the most recent value for an entity
idwith respect to versionpath.Finds the most recent value for an entity
idwith respect to versionpath. If a value is found, it is return along with a suffix suitable for identifier path actualisation.- A
the type of values stored with the entity
- key
the identifier for the object
- tx
the transaction within which the access is performed
- path
the path through which the object has been accessed (the version at which it is read)
- format
the format used to store the entity's values
- returns
Noneif no value was found, otherwise aSomeof the tuple consisting of the suffix and the value. The suffix is the access path minus the prefix at which the value was found. However, the suffix overlaps the prefix in that it begins with the tree entering/exiting tuple at which the value was found.
- abstract def getImmutable[A](key: K, tx: T)(implicit path: T.Acc, format: ConstFormat[A]): Option[A]
Finds the most recent value for an entity
idwith respect to versionpath.Finds the most recent value for an entity
idwith respect to versionpath.The format given is _non_transactional. This is because this trait bridges confluent and ephemeral world (it may use a durable backend, but the data structures used for storing the confluent graph are themselves ephemeral). If the value
Arequires a transactional serialization, the current approach is to pre-serialize the value into an appropriate format (e.g. a byte array) before calling intoput. In that case the wrapping structure must be de-serialized after callingget.- A
the type of values stored with the entity
- key
the identifier for the object
- tx
the transaction within which the access is performed
- path
the path through which the object has been accessed (the version at which it is read)
- format
the format used to store the entity's values
- returns
Noneif no value was found, otherwise aSomeof that value.
- abstract def isFresh(key: K, tx: T)(implicit path: T.Acc): Boolean
Note: requires that
pathis non-empty. - abstract def put[A](key: K, value: A, tx: T)(implicit path: T.Acc, format: TFormat[T, A]): Unit
- abstract def putImmutable[A](key: K, value: A, tx: T)(implicit path: T.Acc, format: ConstFormat[A]): Unit
Stores a new value for a given write path.
Stores a new value for a given write path.
The format given is _non_transactional. This is because this trait bridges confluent and ephemeral world (it may use a durable backend, but the data structures used for storing the confluent graph are themselves ephemeral). If the value
Arequires a transactional serialization, the current approach is to pre-serialize the value into an appropriate format (e.g. a byte array) before calling intoput. In that case the wrapping structure must be de-serialized after callingget.- A
the type of values stored with the entity
- key
the identifier for the object
- value
the value to store
- tx
the transaction within which the access is performed
- path
the path through which the object has been accessed (the version at which it is read)
- format
the format used to store the entity's values
- abstract def remove(key: K, tx: T)(implicit path: T.Acc): Boolean
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