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var bdb_lib = require('berkeleydb')
var dbenv = new bdb_lib.DbEnv();
var bdb_status = dbenv.open('./search/db/env')
if (bdb_status) {
console.log('open dbenv failed:', bdb_status)
process.exit()
}
function db(fn){
var db
fn = "./" + fn + ".db"
function exitHandler(options, err) {
if (db) db.close()
// if (options.cleanup) console.log('clean');
if (err) console.log(err.stack);
if (options.exit) process.exit();
}
// do something when app is closing
process.on('exit', exitHandler.bind(null, {cleanup: true}));
// catches ctrl+c event
process.on('SIGINT', exitHandler.bind(null, {exit: true}));
// catches "kill pid" (for example: nodemon restart)
process.on('SIGUSR1', exitHandler.bind(null, {exit: true}));
process.on('SIGUSR2', exitHandler.bind(null, {exit: true}));
//catches uncaught exceptions
process.on('uncaughtException', exitHandler.bind(null, {exit:true}));
function open(fn){
if (db) db.close()
var _db = new bdb_lib.Db(dbenv);
var bdb_status = _db.open(fn)
if (bdb_status) {
console.log('open ' + fn + ' failed:', bdb_status)
process.exit()
}
db = _db
}
open(fn)
return {
put: function(term, serialized){
db.put(term, serialized)
},
get: function(term){
return db.get(term)
},
}
}
module.exports = db
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