bkjs-lmdb v0.1.2

LMDB module for node and backendjs

Usage

  var lmdb = require("bkjs-lmb");
  var env = new bklmdb.Env({ path: "/tmp" });
  var db = new lmdb.Database(env, { name: "test", flags: lmdb.MDB_CREATE }, function(err) {

     this.put("key1", "value1");
     this.put("key2", "value2");
     this.select("key", "key", { begins_with: 1 }, function(err, rows) {
       console.log(rows);
     });

  });

Env class

• new Env(options) - create new environment
• The options properties:
  • path - the database file path
  • flags - bitmask of LMDB_ flags
  • dbs - number of databases

Database class

• new Database(env, options, callback) - create new database object
• Properties:
  • open - 1 if the db is open
  • name - the database file name
• Methods:
  • close - close the database
  • drop - drop the database file
  • get(key, callback) - return value for the given key
  • put(key, value , flags) - store a value for the given key
  • incr(key, num , flags) - increment a value by a number
  • del(key , value) - delete a key
  • select(start, end ,flags) - return list of matching records The flags are:
    • desc - 1 to return in descendent order
    • begins_with - 1 if match by beginning of the start key
    • count - number of records to return

Author

Vlad Seryakov