Crate persy

Persy - Transactional Persistence Engine

Simple single file, durable, paginated, transactional persistence engine, based on copy on write, write ahead log, two phase commit.

Example

use persy::{Persy,Config};
//...
Persy::create("./open.persy")?;
let persy = Persy::open("./open.persy",Config::new())?;
let mut tx = persy.begin()?;
persy.create_segment(&mut tx, "seg")?;
let data = vec![1;20];
persy.insert_record(&mut tx, "seg", &data)?;
let prepared = persy.prepare_commit(tx)?;
persy.commit(prepared)?;
for rec in persy.scan_records("seg")? {
    assert_eq!(rec.content[0], 20);
    //....
}

Structs

Config	Persy configuration structure.
IteratorItem	Snapshot of a record from the segment iterator
Persy	Main structure to operate persy storage files
RecordScanner	IntoIterator of persistent records of a segment
RecordScannerTx	IntoIterator of persistent records of a segment that include eventual in transaction changes
TransactionFinalize	prepared transaction state

Enums

PersyError	Enum of possible errors from Persy
TxStrategy	Concurrent Modification Strategy for resolution of conflict on commit.
Value	The associated value to the index key
ValueMode	Define the behavior of the index in case a key value pair already exists

Type Definitions

PRes
PersyId	Identifier of a persistent record, can be used for read, update or delete the record
Transaction	Transaction container, it include all the changes done in a transaction.
TransactionId