71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
/*
|
|
© Copyright IBM Corporation 2018
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
// Package ready contains code to provide a ready signal mechanism between processes
|
|
package ready
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"os"
|
|
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
const fileName string = "/tmp/runmqserverReady"
|
|
|
|
func fileExists() (bool, error) {
|
|
_, err := os.Stat(fileName)
|
|
if err != nil {
|
|
if !os.IsNotExist(err) {
|
|
return false, err
|
|
}
|
|
return false, nil
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
// Clear ensures that any readiness state is cleared
|
|
func Clear() error {
|
|
log.Debug("Clear()")
|
|
exist, err := fileExists()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if exist {
|
|
return os.Remove(fileName)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Set lets any subsequent calls to `CheckReady` know that the queue
|
|
// manager has finished its configuration step
|
|
func Set() error {
|
|
log.Debug("Set()")
|
|
return ioutil.WriteFile(fileName, []byte("1"), 0770)
|
|
}
|
|
|
|
// Check checks whether or not the queue manager has finished its
|
|
// configuration steps
|
|
func Check() (bool, error) {
|
|
exists, err := fileExists()
|
|
if err != nil {
|
|
log.Debug("Check() -> false")
|
|
return false, err
|
|
}
|
|
log.Debugf("Check() -> %v", exists)
|
|
return exists, nil
|
|
}
|