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extension-service.go
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extension-service.go
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package impl
import (
"context"
"github.com/apibrew/apibrew/pkg/model"
"github.com/apibrew/apibrew/pkg/resource_model"
"github.com/apibrew/apibrew/pkg/resources"
"github.com/apibrew/apibrew/pkg/service"
"github.com/apibrew/apibrew/pkg/service/annotations"
backend_event_handler "github.com/apibrew/apibrew/pkg/service/backend-event-handler"
"github.com/apibrew/apibrew/pkg/util"
log "github.com/sirupsen/logrus"
)
type extensionService struct {
recordService service.RecordService
ServiceName string
backendProviderService service.BackendProviderService
extensionVersionMap map[string]uint32
extensionHandlerMap map[string]*backend_event_handler.Handler
externalService service.ExternalService
backendEventHandler backend_event_handler.BackendEventHandler
}
func (d *extensionService) Reload() {
d.runConfigureExtensions()
}
func (d *extensionService) Init(config *model.AppConfig) {
d.runConfigureExtensions()
}
func (d *extensionService) runConfigureExtensions() {
log.Trace("Start reconfiguring extension services")
records, _, err := d.recordService.List(util.WithSystemContext(context.TODO()), service.RecordListParams{
Namespace: resources.ExtensionResource.Namespace,
Resource: resources.ExtensionResource.Name,
Limit: 10000,
})
if err != nil {
panic(err)
}
var extensions = util.ArrayMap(records, resource_model.ExtensionMapperInstance.FromRecord)
for _, ext := range extensions {
log.Tracef("Configure extension: %v", ext)
d.configureExtension(ext)
}
log.Trace("Finish reconfiguring extension services")
}
func (d *extensionService) RegisterExtension(extension *resource_model.Extension) {
d.configureExtension(extension)
}
func (d *extensionService) UnRegisterExtension(extension *resource_model.Extension) {
if d.extensionHandlerMap[extension.Id.String()] == nil {
log.Warn("Trying to unregister extension that is not registered")
return
}
d.backendEventHandler.UnRegisterHandler(*d.extensionHandlerMap[extension.Id.String()])
delete(d.extensionHandlerMap, extension.Id.String())
delete(d.extensionVersionMap, extension.Id.String())
}
func (d *extensionService) configureExtension(extension *resource_model.Extension) {
if d.extensionVersionMap[extension.Id.String()] == uint32(extension.Version) {
return
}
d.extensionVersionMap[extension.Id.String()] = uint32(extension.Version)
extensionHandler := d.prepareExtensionHandler(extension)
if d.extensionHandlerMap[extension.Id.String()] != nil {
d.backendEventHandler.UnRegisterHandler(*d.extensionHandlerMap[extension.Id.String()])
}
d.extensionHandlerMap[extension.Id.String()] = &extensionHandler
d.backendEventHandler.RegisterHandler(*d.extensionHandlerMap[extension.Id.String()])
}
func (d *extensionService) prepareExtensionHandler(extension *resource_model.Extension) backend_event_handler.Handler {
return backend_event_handler.Handler{
Id: "extension-" + extension.Id.String(),
Name: "extension-" + extension.Name,
Selector: &model.EventSelector{
Actions: util.ArrayMap(extension.Selector.Actions, func(s resource_model.EventAction) model.Event_Action {
return model.Event_Action(model.Event_Action_value[string(s)])
}),
RecordSelector: nil,
Namespaces: extension.Selector.Namespaces,
Resources: extension.Selector.Resources,
Ids: extension.Selector.Ids,
Annotations: extension.Selector.Annotations,
},
Order: int(extension.Order),
Finalizes: extension.Finalizes,
Sync: extension.Sync,
Responds: extension.Responds,
Fn: func(ctx context.Context, event *model.Event) (*model.Event, error) {
if event.Annotations == nil {
event.Annotations = make(map[string]string)
}
event.Annotations[annotations.ExtensionId] = extension.Id.String()
return d.externalService.Call(ctx, extension.Call, event)
},
}
}
func NewExtensionService(recordService service.RecordService, backendProviderService service.BackendProviderService, backendEventHandler backend_event_handler.BackendEventHandler, externalService service.ExternalService) service.ExtensionService {
return &extensionService{
ServiceName: "ExtensionService",
extensionVersionMap: make(map[string]uint32),
extensionHandlerMap: make(map[string]*backend_event_handler.Handler),
recordService: recordService,
backendProviderService: backendProviderService,
backendEventHandler: backendEventHandler,
externalService: externalService,
}
}