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subscribers.go
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subscribers.go
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package taskqueueworker
import (
"context"
"runtime"
"sort"
"sync"
"github.com/golangid/candi/candihelper"
)
type (
subscriber struct {
mutex sync.Mutex
configuration *configurationUsecase
opt *option
clientTaskSubscribers map[string]*clientTaskDashboardSubscriber
clientTaskJobListSubscribers map[string]*clientTaskJobListSubscriber
clientJobDetailSubscribers map[string]*clientJobDetailSubscriber
closeAllSubscribers chan struct{}
}
clientTaskDashboardSubscriber struct {
c chan TaskListResolver
clientID string
filter *Filter
}
clientTaskJobListSubscriber struct {
c chan JobListResolver
clientID string
skipBroadcast bool
filter *Filter
}
clientJobDetailSubscriber struct {
c chan JobResolver
clientID string
filter *Filter
}
)
func (s *clientTaskDashboardSubscriber) writeDataToChannel(data TaskListResolver) {
defer func() { recover() }()
s.c <- data
}
func (s *clientTaskJobListSubscriber) writeDataToChannel(data JobListResolver) {
defer func() { recover() }()
s.c <- data
}
func (s *clientJobDetailSubscriber) writeDataToChannel(data JobResolver) {
defer func() { recover() }()
s.c <- data
}
func initSubscriber(cfg *configurationUsecase, opt *option) *subscriber {
return &subscriber{
configuration: cfg,
opt: opt,
clientTaskSubscribers: make(map[string]*clientTaskDashboardSubscriber, cfg.getMaxClientSubscriber()),
clientTaskJobListSubscribers: make(map[string]*clientTaskJobListSubscriber, cfg.getMaxClientSubscriber()),
clientJobDetailSubscribers: make(map[string]*clientJobDetailSubscriber, cfg.getMaxClientSubscriber()),
closeAllSubscribers: make(chan struct{}),
}
}
func (s *subscriber) registerNewTaskListSubscriber(clientID string, filter *Filter, clientChannel chan TaskListResolver) error {
if s.getTotalSubscriber() >= s.configuration.getMaxClientSubscriber() {
return errClientLimitExceeded
}
s.mutex.Lock()
defer s.mutex.Unlock()
s.clientTaskSubscribers[clientID] = &clientTaskDashboardSubscriber{
c: clientChannel, filter: filter, clientID: clientID,
}
return nil
}
func (s *subscriber) removeTaskListSubscriber(clientID string) {
s.mutex.Lock()
defer s.mutex.Unlock()
delete(s.clientTaskSubscribers, clientID)
}
func (s *subscriber) registerNewJobListSubscriber(clientID string, filter *Filter, clientChannel chan JobListResolver) error {
if s.getTotalSubscriber() >= s.configuration.getMaxClientSubscriber() {
return errClientLimitExceeded
}
s.mutex.Lock()
defer s.mutex.Unlock()
s.clientTaskJobListSubscribers[clientID] = &clientTaskJobListSubscriber{
c: clientChannel, filter: filter,
}
return nil
}
func (s *subscriber) removeJobListSubscriber(clientID string) {
s.mutex.Lock()
defer s.mutex.Unlock()
delete(s.clientTaskJobListSubscribers, clientID)
}
func (s *subscriber) registerNewJobDetailSubscriber(clientID string, filter *Filter, clientChannel chan JobResolver) error {
if s.getTotalSubscriber() >= s.configuration.getMaxClientSubscriber() {
return errClientLimitExceeded
}
s.mutex.Lock()
defer s.mutex.Unlock()
s.clientJobDetailSubscribers[clientID] = &clientJobDetailSubscriber{
c: clientChannel, filter: filter,
}
return nil
}
func (s *subscriber) removeJobDetailSubscriber(clientID string) {
s.mutex.Lock()
defer s.mutex.Unlock()
delete(s.clientJobDetailSubscribers, clientID)
}
func (s *subscriber) getTotalSubscriber() int {
return len(s.clientTaskSubscribers) + len(s.clientTaskJobListSubscribers) + len(s.clientJobDetailSubscribers)
}
func (s *subscriber) broadcastAllToSubscribers(ctx context.Context) {
if ctx.Err() != nil {
return
}
go func(ctx context.Context) {
if len(s.clientTaskSubscribers) > 0 {
s.broadcastTaskList(ctx)
}
if len(s.clientTaskJobListSubscribers) > 0 {
s.broadcastJobList(ctx)
}
if len(s.clientJobDetailSubscribers) > 0 {
s.broadcastJobDetail(ctx)
}
}(ctx)
}
func (s *subscriber) broadcastTaskList(ctx context.Context) {
var taskRes TaskListResolver
taskRes.Data = make([]TaskResolver, 0)
for _, summary := range s.opt.persistent.Summary().FindAllSummary(ctx, &Filter{}) {
taskRes.Data = append(taskRes.Data, summary.ToTaskResolver())
}
sort.Slice(taskRes.Data, func(i, j int) bool {
return taskRes.Data[i].ModuleName < taskRes.Data[i].ModuleName
})
taskRes.Meta.TotalRecords = len(taskRes.Data)
taskRes.Meta.TotalClientSubscriber = s.getTotalSubscriber()
for clientID, subscriber := range s.clientTaskSubscribers {
taskRes.Meta.Page = subscriber.filter.Page
taskRes.Meta.Limit = subscriber.filter.Limit
taskRes.Meta.CalculatePage()
taskRes.Meta.ClientID = clientID
subscriber.writeDataToChannel(taskRes)
}
}
func (s *subscriber) broadcastJobList(ctx context.Context) {
for clientID := range s.clientTaskJobListSubscribers {
s.broadcastJobListToClient(ctx, clientID)
}
}
func (s *subscriber) broadcastJobListToClient(ctx context.Context, clientID string) {
subscriber, ok := s.clientTaskJobListSubscribers[clientID]
if !ok {
return
}
if subscriber.filter.TaskName != "" {
summary := s.opt.persistent.Summary().FindDetailSummary(ctx, subscriber.filter.TaskName)
if summary.IsLoading {
subscriber.skipBroadcast = summary.IsLoading
subscriber.writeDataToChannel(JobListResolver{
Meta: MetaJobList{IsLoading: summary.IsLoading},
})
return
}
}
if subscriber.skipBroadcast {
return
}
subscriber.filter.Sort = "-created_at"
subscriber.skipBroadcast = candihelper.PtrToString(subscriber.filter.Search) != "" ||
candihelper.PtrToString(subscriber.filter.JobID) != "" ||
(subscriber.filter.StartDate != "" && subscriber.filter.EndDate != "")
var jobListResolver JobListResolver
jobListResolver.GetAllJob(ctx, subscriber.filter)
jobListResolver.Meta.IsFreezeBroadcast = subscriber.skipBroadcast
subscriber.writeDataToChannel(jobListResolver)
}
func (s *subscriber) broadcastJobDetail(ctx context.Context) {
for clientID, subscriber := range s.clientJobDetailSubscribers {
detail, err := s.opt.persistent.FindJobByID(ctx, candihelper.PtrToString(subscriber.filter.JobID), subscriber.filter)
if err != nil {
s.removeJobDetailSubscriber(clientID)
continue
}
var jobResolver JobResolver
jobResolver.ParseFromJob(&detail, 200)
jobResolver.Meta.Page = subscriber.filter.Page
jobResolver.Meta.TotalHistory = subscriber.filter.Count
subscriber.writeDataToChannel(jobResolver)
}
}
func (s *subscriber) broadcastWhenChangeAllJob(ctx context.Context, taskName string, isLoading bool, loadingMessage string) {
s.opt.persistent.Summary().UpdateSummary(ctx, taskName, map[string]interface{}{
"is_loading": isLoading, "loading_message": loadingMessage,
})
var taskRes TaskListResolver
taskRes.Data = make([]TaskResolver, 0)
for _, summary := range s.opt.persistent.Summary().FindAllSummary(ctx, &Filter{}) {
taskRes.Data = append(taskRes.Data, summary.ToTaskResolver())
}
sort.Slice(taskRes.Data, func(i, j int) bool {
return taskRes.Data[i].ModuleName < taskRes.Data[i].ModuleName
})
taskRes.Meta.TotalClientSubscriber = s.getTotalSubscriber()
for _, subscriber := range s.clientTaskSubscribers {
subscriber.writeDataToChannel(taskRes)
}
for _, subscriber := range s.clientTaskJobListSubscribers {
subscriber.skipBroadcast = isLoading
subscriber.writeDataToChannel(JobListResolver{
Meta: MetaJobList{IsLoading: isLoading},
})
}
}
func getMemstats() (res MemstatsResolver) {
var m runtime.MemStats
runtime.ReadMemStats(&m)
res.Alloc = m.Alloc
res.TotalAlloc = m.TotalAlloc
res.NumGC = int(m.NumGC)
res.NumGoroutines = runtime.NumGoroutine()
return
}