Struct MemStorage 

pub struct MemStorage { /* private fields */ }

Trait Implementations

impl Drop for MemStorage

fn drop(&mut self)

Executes the destructor for this type.

impl Storage for MemStorage

type Perspective = MemPerspective

type Segment = MemSegment

type FactIndex = MemFactIndex

type FactPerspective = MemFactPerspective

fn get_linear_perspective( &self, parent: Location, ) -> Result<Self::Perspective, StorageError>

Returns a linear perspective at the given location.

fn get_fact_perspective( &self, location: Location, ) -> Result<Self::FactPerspective, StorageError>

Returns a fact perspective at the given location, intended for evaluating braids. The fact perspective will include the facts of the command at the given location.

fn new_merge_perspective( &self, left: Location, right: Location, _last_common_ancestor: Location, policy_id: PolicyId, braid: MemFactIndex, ) -> Result<Self::Perspective, StorageError>

Returns a merge perspective based on the given locations with the braid as prior facts.

fn get_segment(&self, location: Location) -> Result<MemSegment, StorageError>

Returns the segment at the given location.

fn get_head(&self) -> Result<Location, StorageError>

Returns the location of head of the graph.

fn write( &mut self, update: Self::Perspective, ) -> Result<Self::Segment, StorageError>

Writes the given perspective to a segment.

fn write_facts( &mut self, facts: Self::FactPerspective, ) -> Result<Self::FactIndex, StorageError>

Writes the given fact perspective to a fact index.

fn commit(&mut self, segment: Self::Segment) -> Result<(), StorageError>

Sets the given segment as the head of the graph. Returns an error if the current head is not an ancestor of the provided segment.

fn get_location( &self, address: Address, ) -> Result<Option<Location>, StorageError>

Returns the location of Command with id if it has been stored by searching from the head.

fn get_location_from( &self, start: Location, address: Address, ) -> Result<Option<Location>, StorageError>

Returns the location of Command with id by searching from the given location.

fn get_command_address( &self, location: Location, ) -> Result<Address, StorageError>

Returns the address of the command at the given location.

fn get_head_address(&self) -> Result<Address, StorageError>

Returns the address of the head of the graph.

fn is_ancestor( &self, search_location: Location, segment: &Self::Segment, ) -> Result<bool, StorageError>

Determine whether the given location is an ancestor of the given segment.