sophist

A (maintained) Sophia binding.

API

var db = new Sophist(path);

Create a db instance at path.

db.open([options], [fn]) / db.openSync([options])

Open the database, optionally with the given options.

Options:

• createIfMissing: boolean, default true
• readOnly: boolean, default false
• pageSize: number, default 2048
• mergeWatermark: number, default 100000

yield db.open({ createIfMissing: false });
db.open(function (err) { /* ... */ });
db.openSync();

db.close([fn]) / db.closeSync()

Close the database.

yield db.close();
db.close(function (err) { /* ... */ });
db.closeSync();

db.set(key, value, [fn]) / db.setSync(key, value)

Set key to value in the database.

yield db.set('foo', 'bar');
db.set('foo', 'bar', function (err) { /* ... */ });
db.setSync('foo', 'bar');

db.get(key, [fn]) / db.getSync(key)

Get the value of key.

var value = yield db.get('foo');
db.get('foo', function (err, value) { /* ... */ });
var value = db.getSync('foo');

db.delete(key, [fn]) / db.deleteSync(key)

Delete key from the database.

var value = yield db.delete('foo');
db.delete('foo', function (err) { /* ... */ });
var value = db.deleteSync('foo');

var iterator = db.iterator([options])

Create an iterator.

NOTE: Sophia does not support writes while an iterator is open.

Options:

• reverse: boolean, default false
• start: string, default null
• end: string, default null
• gte: boolean, default false
• lte: boolean, default false

iterator.next([fn])

Get the next key/value pair from the iterator.

Upon reaching the last key, nulls will be provided.

var arr = yield iterator.next(); // [key, value]
iterator.next(function (err, key, value) { /* ... */ });

iterator.end([fn])

End the iterator.

yield iterator.end();
iterator.end(function (err) { /* ... */ });

var transaction = db.transaction()

Create a Sophia transaction.

During a transaction, all writes (set and delete) are posponed until transaction#commit() is called. Transaction writes may be reverted by calling transaction#rollback().

Unlike Sophia's raw C API, values set by transaction#set() and transaction#get() are not able to be retreived by sophist#get().

Sophia does not support nested or multiple transactions, so doing so will cause an error to be thrown.

var transaction = db.transaction();
var transaction2 = db.transaction(); // throws

transaction.set(key, value)

Push a set operation into the transaction.

yield db.set('foo', 'bar');
var transaction = db.transaction();
transaction.set('foo', 'baz');
var val = yield db.get('foo'); // bar
yield transaction.commit();
var val = yield db.get('foo'); // baz

transaction.delete(key)

Push a delete operation into the transaction.

yield db.set('foo', 'bar');
var transaction = db.transaction();
transaction.delete('foo');
var val = yield db.get('foo'); // bar
yield transaction.commit();
var val = yield db.get('foo'); // null

transaction.commit([fn])

Commit the operations stored by the transaction.

var transaction = db.transaction();
// ...
yield transaction.commit();
transaction.commit(function (err) { /* ... */ });

transaction.rollback([fn])

Rollback/revert the operations stored by the transaction.

var transaction = db.transaction();
// ...
yield transaction.rollback();
transaction.rollback(function (err) { /* ... */ });

License

MIT