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locking.go
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locking.go
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// MIT License
//
// Copyright (c) 2016 GenesisCommunity
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package daemons
import (
"context"
"sync"
"time"
"github.com/GenesisCommunity/go-genesis/packages/consts"
"github.com/GenesisCommunity/go-genesis/packages/model"
"github.com/GenesisCommunity/go-genesis/packages/transaction"
log "github.com/sirupsen/logrus"
)
var mutex = sync.Mutex{}
// WaitDB waits for the end of the installation
func WaitDB(ctx context.Context) error {
// There is could be the situation when installation is not over yet.
// Database could be created but tables are not inserted yet
if model.DBConn != nil && CheckDB() {
return nil
}
// poll a base with period
tick := time.NewTicker(1 * time.Second)
for {
select {
case <-tick.C:
if model.DBConn != nil && CheckDB() {
return nil
}
case <-ctx.Done():
return ctx.Err()
}
}
}
// CheckDB check if installation complete or not
func CheckDB() bool {
install := &model.Install{}
err := install.Get()
if err != nil {
log.WithFields(log.Fields{"type": consts.DBError, "error": err}).Error("getting install")
}
if install.Progress == model.ProgressComplete {
return true
}
return false
}
// DBLock locks daemons
func DBLock() {
mutex.Lock()
}
// DBUnlock unlocks database
func DBUnlock() {
transaction.CleanCache()
mutex.Unlock()
}