MQTT 消息流程

Preview update (execute app action)

MQTT Server

Service State update

PUB /mobile/yyyy/data/screenshot (raw data)

PUB /mobile/xxxx/data/preview (raw data)

/mobile/yyyy/data/screenshot (raw data)

MediaCenter

Mobile

/app/mediacenter/main/actions/preview (xxxx)

/app/state/main (mediacenter)

/mobile/xxxx/data/preview (raw data)

/service/state/main (tandemservice)

App State update

Execute service action

PUB /app/mediacenter/main/actions/preview (uuid:xxxx)

PUB /app/state/main (mediacenter)

PUB /service/tandemservice/main/actions/screenshot (uuid:yyyy)

Tandem Service

PUB /service/state/main (tandemservice)

/service/tandemservice/main/actions/screenshot (uuid:yyyy)