Crate exar [−] [src]

Exar DB

Exar DB is an event store with streaming support which uses a flat-file for each collection of events

Database Initialization

extern crate exar;

use exar::*;

let config = DatabaseConfig::default();
let mut db = Database::new(config);

Publishing events

extern crate exar;

use exar::*;

let config = DatabaseConfig::default();
let mut db = Database::new(config);

let collection_name = "test";
let connection = db.connect(collection_name).unwrap();

match connection.publish(Event::new("payload", vec!["tag1", "tag2"])) {
    Ok(event_id) => println!("Published event with ID: {}", event_id),
    Err(err) => panic!("Unable to publish event: {}", err)
};

Querying events

extern crate exar;

use exar::*;

let config = DatabaseConfig::default();
let mut db = Database::new(config);

let collection_name = "test";
let connection = db.connect(collection_name).unwrap();

let query = Query::live().offset(0).limit(10).by_tag("tag1");
let event_stream = connection.subscribe(query).unwrap();
for event in event_stream {
    println!("Received event: {}", event);
}

Macros

tab_separated

Generates a tab separated string from a list of string slices

Structs

Collection	Exar DB's collection of events, containing the reference to the log and index files.
CollectionConfig	Exar DB's collection configuration.
Connection	Exar DB's database connection, which contains a reference to a collection wrapped into an Arc/Mutex. It allows publishing and subscribing to the underling collection of events.
Database	Exar DB's main component, containing the database configuration and the references to the collections of events created. It is used to create new connections.
DatabaseConfig	Exar DB's configuration.
Event	Exar DB's event.
EventStream	Exar DB's event stream.
Interval	An interval.
Log	Exar DB's log file abstraction.
Logger	Exar DB's event logger.
PartialCollectionConfig	Exar DB's partial collection configuration. Holds overrides for the main database configuration.
PartialScannersConfig	Exar DB's partial scanners configuration. Holds overrides for the main database configuration.
Query	Exar DB's subscription query.
Scanner	Exar DB's log file scanner.
ScannerThread	Exar DB's log file scanner thread.
ScannersConfig	Exar DB's scanners configuration.
Subscription	Exar DB's subscription.
TabSeparatedParser	A parser for tab-separated strings
ValidationError	A validation error.

Enums

DatabaseError	A list specifying categories of database error.
EventStreamError	A list specifying categories of event stream error.
EventStreamMessage	Exar DB's event stream message.
ParseError	A list specifying categories of parse error.
RoutingStrategy	A list specifying categories of routing strategy.
ScannerAction

Traits

FromTabSeparatedStr	A trait for deserializing a type from a tab-separated string slice.
Merge	A trait for merging a type.
ToTabSeparatedString	A trait for serializing a type to a tab-separated string.
Validation	A trait for validating a type.
WriteLine	A trait for writing a line into a stream.