DARTFile

DART File system Distributed Archive of Random Transaction This class handles the CRUD Database

The archive is hashed and store in structure similar to merkle trees datastruct. Which here is called at sparsed merkle tree the sparse merkle is section in to rims in hierarchy which is where each rim contains a sub-tree called Branches. If a rim Doesn't branches out it contains a Leave which contains a Archive

@safe

class DARTFile {

enum default_flat;

immutable(string) filename;

const

Flag!"flat" flat;

protected

RecordFactory manufactor;

protected

BlockFile blockfile;

protected

Fingerprint _fingerprint;

enum flat_marker;

enum MIN_BLOCK_SIZE;

this(HashNet net, string filename, Flag!"read_only" read_only);

void close();

alias bullseye = fingerprint;

RecordFactory.Recorder recorder();

RecordFactory.Recorder recorder(const(Document) doc);

RecordFactory.Recorder recorder(RecordFactory.Recorder.Archives archives);

struct Branches;

Document load(const(Branches) b, uint key);

class RimWalkerFiber;

RimWalkerFiber rimWalkerRange(immutable(Buffer) rim_paths);

string indent(uint rim_level);

RecordFactory.Recorder loads(Range dart_indices, Archive.Type type);

enum RIMS_IN_SECTOR;

Fingerprint modify(const(RecordFactory.Recorder) modifyrecords, Flag!"undo" undo);

Fingerprint modify(const(RecordFactory.Recorder) modifyrecords);

Fingerprint futureEye(const(RecordFactory.Recorder) modifyrecords, Flag!"undo" undo);

Branches branches(const(ubyte[]) rim_path, Index* branch_index);

enum indent_tab;

enum eye_prefix;

void dump(SectorRange sectors, Flag!"full" full, uint depth);

}

Constructors

this this(HashNet net, string filename, Flag!"read_only" read_only): A file set by filename should be create by the BlockFile before it can be used as a DARTFile

Members

Aliases

bullseye alias bullseye = fingerprint: Ditto for fingerprint

Classes

RimWalkerFiber class RimWalkerFiber: Undocumented in source.

Functions

branches Branches branches(const(ubyte[]) rim_path, Index* branch_index)

Loads the branches from the DART at rim_path

close void close()

Close the DARTFile

dump void dump(SectorRange sectors, Flag!"full" full, uint depth)

Dumps the dart as rim-path

futureEye Fingerprint futureEye(const(RecordFactory.Recorder) modifyrecords, Flag!"undo" undo)

Wrapper function for the modify function.

indent string indent(uint rim_level)

Create indet string a rim_level

load Document load(const(Branches) b, uint key)

Reads the data at branch key

loads RecordFactory.Recorder loads(Range dart_indices, Archive.Type type)

Loads all the archives in the list of fingerprints

modify Fingerprint modify(const(RecordFactory.Recorder) modifyrecords, Flag!"undo" undo)

Wrapper function for the modify function.

modify Fingerprint modify(const(RecordFactory.Recorder) modifyrecords)

Sample of the DART Map
	key[0]	key[1]	key[2]	key[3]	key[4]
rim	00	01	02	03	04	....
	20	A3	33	B1	17	-> archive fingerprint=20_A3_33_B1_17....
	**	**	**	**	42	-> archive fingerprint=20_A3_33_B1_42....
	**	**	57	B1	17	-> archive fingerprint=20_A3_57_B1_17....
	**	**	**	**	42	-> archive fingerprint=20_A3_57_B1_42....
	**	**	C2			-> archive fingerprint=20_A3_C3....
	**	**	CA	48		-> archive fingerprint=20_A3_CA_48....
	**	**	**	68		-> archive fingerprint=20_A3_CA_48....

Sector=[key[0],key[1]] <br> ### Note ** means the same value as above The first two rims is set the sector and the following is rims represents the key index into the Branches incices The modifyrecords contains the archives which is going to be added or deleted The type of archive tells which actions are going to be performed by the modifier If the function executes successfully then the DART is updated or else it does not affect the DART The function returns the bullseye of the dart

recorder RecordFactory.Recorder recorder()

Creates a recorder factor

recorder RecordFactory.Recorder recorder(const(Document) doc)

Creates a recorder from a document using the RecorderFactory used by the DART

recorder RecordFactory.Recorder recorder(RecordFactory.Recorder.Archives archives)

Ditto

rimWalkerRange RimWalkerFiber rimWalkerRange(immutable(Buffer) rim_paths)

A range which traverse the branches below the rim_paths The range build as a Fiber.

Structs

Branches struct Branches: Data struct which contains the branches in sub-tree

tagion dart DARTFile classes

DARTFile

functions

rim_key