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feat!: replace REST device callbacks with System Events
BREAKING CHANGE:
the following device callback REST endpoints are removed:
- POST /callback/device
- PUT /callback/device
- DELETE /callback/device/name/{name}
closes #1259
Signed-off-by: Chris Hung <chris@iotechsys.com>- Loading branch information
Chris Hung
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Jan 11, 2023
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| // | ||
| // Copyright (C) 2023 IOTech Ltd | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package messaging | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
|
|
||
| bootstrapContainer "github.com/edgexfoundry/go-mod-bootstrap/v3/bootstrap/container" | ||
| "github.com/edgexfoundry/go-mod-bootstrap/v3/di" | ||
| "github.com/edgexfoundry/go-mod-core-contracts/v3/common" | ||
| "github.com/edgexfoundry/go-mod-core-contracts/v3/dtos" | ||
| "github.com/edgexfoundry/go-mod-core-contracts/v3/dtos/requests" | ||
| "github.com/edgexfoundry/go-mod-core-contracts/v3/errors" | ||
| "github.com/edgexfoundry/go-mod-messaging/v3/pkg/types" | ||
|
|
||
| "github.com/edgexfoundry/device-sdk-go/v3/internal/application" | ||
| "github.com/edgexfoundry/device-sdk-go/v3/internal/container" | ||
| ) | ||
|
|
||
| const SystemEventTopic = "SystemEventTopic" | ||
|
|
||
| func DeviceCallback(ctx context.Context, dic *di.Container) errors.EdgeX { | ||
| lc := bootstrapContainer.LoggingClientFrom(dic.Get) | ||
| messageBusInfo := container.ConfigurationFrom(dic.Get).MessageQueue | ||
| systemEventTopic := messageBusInfo.Topics[SystemEventTopic] | ||
|
|
||
| messages := make(chan types.MessageEnvelope) | ||
| messageErrors := make(chan error) | ||
| topics := []types.TopicChannel{ | ||
| { | ||
| Topic: systemEventTopic, | ||
| Messages: messages, | ||
| }, | ||
| } | ||
|
|
||
| messageBus := bootstrapContainer.MessagingClientFrom(dic.Get) | ||
| err := messageBus.Subscribe(topics, messageErrors) | ||
| if err != nil { | ||
| return errors.NewCommonEdgeXWrapper(err) | ||
| } | ||
|
|
||
| go func() { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| lc.Infof("Exiting waiting for MessageBus '%s' topic messages", systemEventTopic) | ||
| return | ||
| case err = <-messageErrors: | ||
| lc.Error(err.Error()) | ||
| case msgEnvelope := <-messages: | ||
| lc.Debugf("System event received on message queue. Topic: %s, Correlation-id: %s ", systemEventTopic, msgEnvelope.CorrelationID) | ||
|
|
||
| var systemEvent dtos.SystemEvent | ||
| err := json.Unmarshal(msgEnvelope.Payload, &systemEvent) | ||
| if err != nil { | ||
| lc.Errorf("failed to JSON decoding system event: %s", err.Error()) | ||
| continue | ||
| } | ||
|
|
||
| serviceName := container.DeviceServiceFrom(dic.Get).Name | ||
| if systemEvent.Owner != serviceName { | ||
| lc.Errorf("unmatched system event owner %s with service name %s", systemEvent.Owner, serviceName) | ||
| continue | ||
| } | ||
|
|
||
| if systemEvent.Type != common.DeviceSystemEventType { | ||
| lc.Errorf("unknown system event type %s", systemEvent.Type) | ||
| continue | ||
| } | ||
|
|
||
| var device dtos.Device | ||
| err = systemEvent.DecodeDetails(&device) | ||
| if err != nil { | ||
| lc.Errorf("failed to decode system event details: %s", err.Error()) | ||
| continue | ||
| } | ||
|
|
||
| switch systemEvent.Action { | ||
| case common.DeviceSystemEventActionAdd: | ||
| err = application.AddDevice(requests.NewAddDeviceRequest(device), dic) | ||
| if err != nil { | ||
| lc.Error(err.Error(), common.CorrelationHeader, msgEnvelope.CorrelationID) | ||
| } | ||
| case common.DeviceSystemEventActionUpdate: | ||
| deviceModel := dtos.ToDeviceModel(device) | ||
| updateDeviceDTO := dtos.FromDeviceModelToUpdateDTO(deviceModel) | ||
| err = application.UpdateDevice(requests.NewUpdateDeviceRequest(updateDeviceDTO), dic) | ||
| if err != nil { | ||
| lc.Error(err.Error(), common.CorrelationHeader, msgEnvelope.CorrelationID) | ||
| } | ||
| case common.DeviceSystemEventActionDelete: | ||
| err = application.DeleteDevice(device.Name, dic) | ||
| if err != nil { | ||
| lc.Error(err.Error(), common.CorrelationHeader, msgEnvelope.CorrelationID) | ||
| } | ||
| default: | ||
| lc.Errorf("unknown device system event action %s", systemEvent.Action) | ||
| } | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| return nil | ||
| } |
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