mirror of
https://github.com/cgrates/cgrates.git
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104 lines
3.1 KiB
Go
104 lines
3.1 KiB
Go
/*
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Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
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Copyright (C) ITsysCOM GmbH
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This program 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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This program 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 this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package loaders
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import (
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"encoding/csv"
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"fmt"
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"os"
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"path"
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"github.com/cgrates/cgrates/config"
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"github.com/cgrates/cgrates/utils"
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)
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type openedCSVFile struct {
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fileName string
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fd *os.File
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csvRdr *csv.Reader
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}
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// Loader is one instance loading from a folder
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type Loader struct {
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tpInDir string
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tpOutDir string
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lockFilename string
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cacheSConns []*config.HaPoolConfig
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fieldSep string
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dataTpls []*config.LoaderSDataType
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rdrs map[string]map[string]*openedCSVFile // map[loaderType]map[fileName]*openedCSVFile for common incremental read
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procRows int // keep here the last processed row in the file/-s
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}
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// lockFolder will attempt to lock the folder by creating the lock file
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func (ldr *Loader) lockFolder() (err error) {
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_, err = os.OpenFile(path.Join(ldr.tpInDir, ldr.lockFilename),
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os.O_RDONLY|os.O_CREATE, 0644)
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return
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}
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func (ldr *Loader) unlockFolder() (err error) {
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return os.Remove(path.Join(ldr.tpInDir,
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ldr.lockFilename))
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}
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// ProcessFolder will process the content in the folder with locking
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func (ldr *Loader) ProcessFolder() (err error) {
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if err = ldr.lockFolder(); err != nil {
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return
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}
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defer ldr.unlockFolder()
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for loaderType := range ldr.rdrs {
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switch loaderType {
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case utils.MetaAttributes:
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if err = ldr.processAttributes(); err != nil {
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utils.Logger.Warning(fmt.Sprintf("<%s> loaderType: <%s>, err: %s",
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utils.LoaderS, loaderType, err.Error()))
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}
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default:
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utils.Logger.Warning(fmt.Sprintf("<%s> unsupported loaderType: <%s>",
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utils.LoaderS, loaderType))
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}
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}
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return
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}
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// unreferenceFile will cleanup an used file by closing and removing from referece map
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func (ldr *Loader) unreferenceFile(loaderType, fileName string) (err error) {
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openedCSVFile := ldr.rdrs[loaderType][fileName]
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ldr.rdrs[loaderType][fileName] = nil
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return openedCSVFile.fd.Close()
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}
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// processAttributes contains the procedure for loading Attributes
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func (ldr *Loader) processAttributes() (err error) {
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// open files as csv readers
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for fName := range ldr.rdrs[utils.MetaAttributes] {
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var fd *os.File
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if fd, err = os.Open(path.Join(ldr.tpInDir, fName)); err != nil {
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return err
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}
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ldr.rdrs[utils.MetaAttributes][fName] = &openedCSVFile{
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fileName: fName, fd: fd, csvRdr: csv.NewReader(fd)}
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defer ldr.unreferenceFile(utils.MetaAttributes, fName)
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}
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// start processing lines
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return
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}
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