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models.go
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models.go
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/*
*
* k6 - a next-generation load testing tool
* Copyright (C) 2016 Load Impact
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package lib
import (
"crypto/md5"
"encoding/hex"
"encoding/json"
"github.com/pkg/errors"
"gopkg.in/guregu/null.v3"
"strings"
"sync"
"time"
)
const groupSeparator = "::"
var ErrNameContainsGroupSeparator = errors.Errorf("group and check names may not contain '%s'", groupSeparator)
type Stage struct {
Duration time.Duration `json:"duration"`
Target null.Int `json:"target"`
}
func (s *Stage) UnmarshalJSON(data []byte) error {
var fields struct {
Duration string `json:"duration"`
Target null.Int `json:"target"`
}
if err := json.Unmarshal(data, &fields); err != nil {
return err
}
s.Target = fields.Target
if fields.Duration != "" {
d, err := time.ParseDuration(fields.Duration)
if err != nil {
return err
}
s.Duration = d
}
return nil
}
type Group struct {
ID string `json:"id"`
Path string `json:"path"`
Name string `json:"name"`
Parent *Group `json:"parent"`
Groups map[string]*Group `json:"groups"`
Checks map[string]*Check `json:"checks"`
groupMutex sync.Mutex
checkMutex sync.Mutex
}
func NewGroup(name string, parent *Group) (*Group, error) {
if strings.Contains(name, groupSeparator) {
return nil, ErrNameContainsGroupSeparator
}
path := name
if parent != nil {
path = parent.Path + groupSeparator + path
}
hash := md5.Sum([]byte(path))
id := hex.EncodeToString(hash[:])
return &Group{
ID: id,
Path: path,
Name: name,
Parent: parent,
Groups: make(map[string]*Group),
Checks: make(map[string]*Check),
}, nil
}
func (g *Group) Group(name string) (*Group, error) {
snapshot := g.Groups
group, ok := snapshot[name]
if !ok {
g.groupMutex.Lock()
defer g.groupMutex.Unlock()
group, ok := g.Groups[name]
if !ok {
group, err := NewGroup(name, g)
if err != nil {
return nil, err
}
g.Groups[name] = group
return group, nil
}
return group, nil
}
return group, nil
}
func (g *Group) Check(name string) (*Check, error) {
snapshot := g.Checks
check, ok := snapshot[name]
if !ok {
g.checkMutex.Lock()
defer g.checkMutex.Unlock()
check, ok := g.Checks[name]
if !ok {
check, err := NewCheck(name, g)
if err != nil {
return nil, err
}
g.Checks[name] = check
return check, nil
}
return check, nil
}
return check, nil
}
type Check struct {
ID string `json:"id"`
Path string `json:"path"`
Group *Group `json:"group"`
Name string `json:"name"`
Passes int64 `json:"passes"`
Fails int64 `json:"fails"`
}
func NewCheck(name string, group *Group) (*Check, error) {
if strings.Contains(name, groupSeparator) {
return nil, ErrNameContainsGroupSeparator
}
path := group.Path + groupSeparator + name
hash := md5.Sum([]byte(path))
id := hex.EncodeToString(hash[:])
return &Check{
ID: id,
Path: path,
Group: group,
Name: name,
}, nil
}