Support automatic migration of Devices between Device Services

[iain-anderson]

🚀 Feature Request

[NB WIP: There may well be insuperable problems with this]

Relevant Package

core-metadata, device services

Description

In a scenario where a device can move between the connectivity domains of different device services (eg a radio-connected device physically moving in and out of range of various base stations), we wish to be able to automatically update the Device object in EdgeX accordingly.

Describe the solution you'd like

• ProvisionWatchers to allow wildcarded DeviceService field, eg "device-bluetooth-basement-*"
• core-metadata to match said wildcard when queried for PWs for a particular Device Service
• DS implementation would have to generate a consistent name for a Device whichever DS discovers it
• DS SDK to detect that a discovered device already exists, and update the Device's Device Service field to point to itself
• DS SDK to react appropriately to the callback from core-metadata indicating that a Device now belongs to it / to another DS

Describe alternatives you've considered

Have you considered any alternative solutions or workarounds?

[michaelestrin]

Discussed in last week's Device Services WG call and decided not to do this for Geneva. Changing label to unscoped.

[cloudxxx8]

@iain-anderson do we still need this issue?

[jumpingliu]

same as #4694