mirror of https://git.envs.net/envs/getwtxt.git
110 lines
2.2 KiB
Go
110 lines
2.2 KiB
Go
/*
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Copyright (c) 2019 Ben Morrison (gbmor)
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This file is part of Getwtxt.
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Getwtxt is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Getwtxt is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Getwtxt. If not, see <https://www.gnu.org/licenses/>.
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*/
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package svc // import "git.sr.ht/~gbmor/getwtxt/svc"
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import (
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"log"
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"time"
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"github.com/syndtr/goleveldb/leveldb"
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"golang.org/x/sys/unix"
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)
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// Everything in this file is database-agnostic.
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// Functions and types related to specific kinds
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// of databases will be in their own respective
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// files, such as:
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// - leveldb.go
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// - sqlite.go
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// Abstraction to allow several different
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// databases to be used interchangeably.
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type dbase interface {
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push() error
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pull()
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delUser(string) error
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}
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// Opens a new connection to the specified
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// database, then reads it into memory.
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func initDatabase() {
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var db dbase
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confObj.Mu.RLock()
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dbpath := confObj.DBPath
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confObj.Mu.RUnlock()
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switch confObj.DBType {
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case "leveldb":
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lvl, err := leveldb.OpenFile(dbpath, nil)
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errFatal("", err)
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db = &dbLevel{db: lvl}
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case "sqlite":
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db = initSqlite()
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}
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dbChan <- db
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pullDB()
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}
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// Close the database connection.
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func killDB() {
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db := <-dbChan
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switch dbType := db.(type) {
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case *dbLevel:
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errLog("", dbType.db.Close())
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case *dbSqlite:
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errLog("", dbType.db.Close())
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}
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}
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// Pushes the registry's cache data
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// to a local database for safe keeping.
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func pushDB() error {
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db := <-dbChan
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err := db.push()
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dbChan <- db
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unix.Sync()
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return err
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}
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// Reads the database from disk into memory.
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func pullDB() {
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start := time.Now()
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db := <-dbChan
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db.pull()
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dbChan <- db
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log.Printf("Database pull took: %v\n", time.Since(start))
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}
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func delUser(userURL string) error {
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db := <-dbChan
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err := db.delUser(userURL)
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dbChan <- db
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if err != nil {
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return err
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}
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return twtxtCache.DelUser(userURL)
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}
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