105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
/*
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© Copyright IBM Corporation 2018, 2023
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package ready contains code to provide a ready signal mechanism between processes
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package ready
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import (
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"context"
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"io/ioutil"
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"os"
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"strings"
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"github.com/ibm-messaging/mq-container/internal/command"
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)
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const fileName string = "/run/runmqserver/ready"
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func fileExists() (bool, error) {
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_, err := os.Stat(fileName)
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if err != nil {
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if !os.IsNotExist(err) {
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return false, err
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}
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return false, nil
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}
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return true, nil
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}
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// Clear ensures that any readiness state is cleared
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func Clear() error {
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exist, err := fileExists()
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if err != nil {
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return err
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}
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if exist {
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return os.Remove(fileName)
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}
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return nil
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}
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// Set lets any subsequent calls to `CheckReady` know that the queue
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// manager has finished its configuration step
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func Set() error {
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return ioutil.WriteFile(fileName, []byte("1"), 0770)
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}
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// Check checks whether or not the queue manager has finished its
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// configuration steps
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func Check() (bool, error) {
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exists, err := fileExists()
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if err != nil {
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return false, err
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}
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return exists, nil
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}
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// Status returns an enum representing the current running status of the queue manager
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func Status(ctx context.Context, name string) (QMStatus, error) {
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out, _, err := command.RunContext(ctx, "dspmq", "-n", "-m", name)
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if err != nil {
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return StatusUnknown, err
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}
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if strings.Contains(string(out), "(RUNNING)") {
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return StatusActiveQM, nil
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}
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if strings.Contains(string(out), "(RUNNING AS STANDBY)") {
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return StatusStandbyQM, nil
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}
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if strings.Contains(string(out), "(REPLICA)") {
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return StatusStandbyQM, nil
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}
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return StatusUnknown, nil
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}
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type QMStatus int
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const (
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StatusUnknown QMStatus = iota
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StatusActiveQM
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StatusStandbyQM
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StatusReplicaQM
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)
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// ActiveQM returns true if the queue manager is running in active mode
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func (s QMStatus) ActiveQM() bool { return s == StatusActiveQM }
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// StandbyQM returns true if the queue manager is running in standby mode
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func (s QMStatus) StandbyQM() bool { return s == StatusStandbyQM }
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// ReplicaQM returns true if the queue manager is running in replica mode
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func (s QMStatus) ReplicaQM() bool { return s == StatusReplicaQM }
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