/
safestate.go
90 lines (82 loc) · 2.05 KB
/
safestate.go
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/*
* === This file is part of ALICE O² ===
*
* Copyright 2018 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
package workflow
import (
"github.com/AliceO2Group/Control/core/task"
"sync"
)
type SafeState struct {
mu sync.RWMutex
state task.State
}
func aggregateState(roles []Role) (state task.State) {
state = task.INVARIANT
if len(roles) == 0 {
return
}
for _, c := range roles {
taskR, isTaskRole := c.(*taskRole)
callR, isCallRole := c.(*callRole)
if isTaskRole {
if !taskR.Critical {
continue
}
} else if isCallRole {
if !callR.Critical {
continue
}
}
state = state.X(c.GetState())
}
return
}
func (t *SafeState) merge(s task.State, r Role) {
t.mu.Lock()
defer t.mu.Unlock()
if t.state == s {
return
}
_, isTaskRole := r.(*taskRole)
_, isCallRole := r.(*callRole)
if isTaskRole || isCallRole {
t.state = s
return
}
switch {
case s == task.MIXED && t.state != task.ERROR:
t.state = task.MIXED
return
case s == task.ERROR:
t.state = task.ERROR
return
default:
allRoles := r.GetRoles()
t.state = aggregateState(allRoles)
}
}
func (t *SafeState) get() task.State {
t.mu.RLock()
defer t.mu.RUnlock()
return t.state
}