That service provider suppliles services for all robotkernel modules with support for key value devices. The service provider will provide acyclic calls to access the key value entries.

Configuration

No specific configuration is needed for the service provider. The robotkernel just needs to know which service provider to load. To load der service_provider_key_value just add it to your config file.

service_providers:
- name: kv_sp
  so_file: libservice_provider_key_value.so

Services

read : Returns a list values with the values corresponding to the reqeusted keys. On error, the error_message field will be filled with the error cause.

request:
- vector/uint32_t: keys
response:
- vector/string: values
- string: error_message

write : Writes key-value-pairs to the device. The lists keys and values must be of equal size. On error, the error_message field will be filled with the error cause.

request:
- vector/uint32_t: keys
- vector/string: values
response:
- string: error_message

list : Returns a list with all available keys and their names. On error, the error_message field will be filled with the error cause.

response:
- vector/uint32_t: keys
- vector/string: names
- string: error_message

list_descriptions : Returns the available description fiels of all keys.

response:
- vector/string: description
- vector/string: unit
- vector/string: default_value
- vector/string: format
- vector/uint8_t: read_only

All of these services will be available through a robotkernel brigdge (e.g. bridge_ln, bridge_jsonrpc, bridge_cli, ...)

Serivice Provider Key Value