/
update.go
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/
update.go
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// Copyright (c) 2022 Fujitsu Limited
package publish
import (
"fmt"
"github.com/segmentio/kafka-go"
"k8s.io/client-go/kubernetes"
"k8s.io/klog/v2"
lifetimesapi "github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/apis/cr/lifetimes/v1alpha1"
volumecontrolapi "github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/apis/grpc/volumecontrol/v1alpha1"
coreclientset "github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/client/cr/core/clientset/versioned"
lifetimesvolumectl "github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/lifetimes/volumecontrol"
"github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/messagequeue"
messagepub "github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/messagequeue/publish"
volumemq "github.com/FujitsuResearch/data-sharing-controllers-on-k8s/pkg/volume/messagequeue"
)
type updateMessagesChannel struct {
method int
messages []kafka.Message
}
type VolumeMessageQueueUpdatePublisher struct {
messageQueue *messagepub.MessageQueueUpdatePublisher
volume *messageQueuePublisher
updateMessagesCh chan *updateMessagesChannel
}
func CreateVolumeMessageQueueUpdatePublisherConfiguration(
fileSystemSpec *lifetimesapi.OutputFileSystemSpec,
dataClient coreclientset.Interface, kubeClient kubernetes.Interface,
messageQueueSpec *lifetimesapi.PublishMessageQueueSpec,
messageQueuePublisherOptions *messagepub.MessageQueuePublisherOptions) (
*volumecontrolapi.MessageQueue, error) {
messageQueueTopic := volumemq.GetMessageQueueTopic(
fileSystemSpec.PersistentVolumeClaimRef.Namespace,
fileSystemSpec.PersistentVolumeClaimRef.Name)
updateTopic, err := messageQueueTopic.CreateUpdateTopic()
if err != nil {
return nil, err
}
return lifetimesvolumectl.CreateGrpcMessageQueue(
dataClient, kubeClient, messageQueueSpec, updateTopic,
messageQueuePublisherOptions)
}
func NewVolumeMessageQueueUpdatePublisher(
messageQueueConfig *messagequeue.MessageQueueConfig, topic string,
compressionCodecOption string, volumeRootPath string, maxBatchBytes int,
channelBufferSize int) (
*VolumeMessageQueueUpdatePublisher, error) {
messageQueuePublisher, err := messagepub.NewMessageQueueUpdatePublisher(
messageQueueConfig, topic, compressionCodecOption, maxBatchBytes)
if err != nil {
return nil, err
}
maxBatchSize := messageQueuePublisher.GetMaxBatchSize()
volumePublisher := newMessageQueuePublisher(volumeRootPath, maxBatchSize)
chanBufferSize := messagequeue.DefaultUpdatePublishChannelBufferSize
if channelBufferSize != 0 {
chanBufferSize = channelBufferSize
}
updateMessagesCh := make(chan *updateMessagesChannel, chanBufferSize)
publisher := &VolumeMessageQueueUpdatePublisher{
messageQueue: messageQueuePublisher,
volume: volumePublisher,
updateMessagesCh: updateMessagesCh,
}
go publisher.start()
return publisher, nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) CloseMessageQueue() error {
close(vmqup.updateMessagesCh)
return vmqup.messageQueue.CloseMessageQueue()
}
func (vmqup *VolumeMessageQueueUpdatePublisher) CreateUpdateFileMessages(
path string, offset int64, contents []byte) error {
duplicatedContents := make([]byte, len(contents))
copy(duplicatedContents, contents)
messages, err := vmqup.volume.createUpdateFileMessages(
path, offset, duplicatedContents)
if err != nil {
return err
}
vmqup.updateMessagesCh <- &updateMessagesChannel{
method: volumemq.MessageMethodAdd,
messages: messages,
}
return nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) CreateDeleteFileMessages(
path string) error {
messages, err := vmqup.volume.createDeleteFileMessages(path)
if err != nil {
return err
}
vmqup.updateMessagesCh <- &updateMessagesChannel{
method: volumemq.MessageMethodDelete,
messages: messages,
}
return nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) CreateRenameFileMessages(
newPath string, oldPath string) error {
messages, err := vmqup.volume.createRenameFileMessages(newPath, oldPath)
if err != nil {
return err
}
vmqup.updateMessagesCh <- &updateMessagesChannel{
method: volumemq.MessageMethodRename,
messages: messages,
}
return nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) writeUpdateFileMessages(
writeMessages []kafka.Message) error {
err := vmqup.messageQueue.WriteQueueMessages(writeMessages)
if err != nil {
return fmt.Errorf(
"Failed to send the 'update-file' message: %v", err.Error())
}
return nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) writeDeleteFileMessages(
deleteMessages []kafka.Message) error {
err := vmqup.messageQueue.WriteQueueMessages(deleteMessages)
if err != nil {
return fmt.Errorf(
"Failed to send the 'delete-file' message: %v", err.Error())
}
return nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) writeRenameFileMessages(
renameMessages []kafka.Message) error {
err := vmqup.messageQueue.WriteQueueMessages(renameMessages)
if err != nil {
return fmt.Errorf(
"Failed to send the 'rename-file' message: %v", err.Error())
}
return nil
}
func (vmqup *VolumeMessageQueueUpdatePublisher) handleUpdateMessage(
updateMessages *updateMessagesChannel) {
switch updateMessages.method {
case volumemq.MessageMethodAdd:
err := vmqup.writeUpdateFileMessages(updateMessages.messages)
if err != nil {
klog.Errorf("Failed to update message for 'write()': %v",
err.Error())
}
case volumemq.MessageMethodDelete:
err := vmqup.writeDeleteFileMessages(updateMessages.messages)
if err != nil {
klog.Errorf("Failed to update message for 'unlink()': %v",
err.Error())
}
case volumemq.MessageMethodRename:
err := vmqup.writeRenameFileMessages(updateMessages.messages)
if err != nil {
klog.Errorf("Failed to update message for 'rename()': %v",
err.Error())
}
default:
klog.Errorf(
"Not support such a update publish message method: %+v",
*updateMessages)
}
}
func (vmqup *VolumeMessageQueueUpdatePublisher) start() {
outerLoop:
for {
select {
case updateMessages, ok := <-vmqup.updateMessagesCh:
if !ok {
err := vmqup.messageQueue.CloseMessageQueue()
if err != nil {
klog.Errorf(
"Failed to close update the message queue : %v",
err.Error())
}
break outerLoop
}
vmqup.handleUpdateMessage(updateMessages)
}
}
klog.Info("Finished volume message queue update publisher()")
}