This release is a pre-release and may not be stable for production use.
Keelson-SDK (python)
A python SDK for keelson.
Basic usage
See the tests
Keelson codec for zenoh-cli
The python sdk also bundles a keelson codec for zenoh-cli. Installed next to it, zenoh put and zenoh subscribe can write and read keelson envelopes, so shell pipelines (e.g. porla) can exchange data with keelson directly. The codec picks the payload type from the subject in the key.
| Encoder / decoder | Subjects | Value |
|---|---|---|
keelson-enclose-from-text / keelson-uncover-to-text |
payload TimestampedString or TimestampedBytes (raw, raw_nmea0183, raw_lwe450, raw_json, name, ...) |
one line of text; a trailing line terminator is dropped on enclose |
keelson-enclose-from-base64 / keelson-uncover-to-base64 |
payload TimestampedBytes (raw, raw_nmea2000, raw_rtcm_v3, ...) |
base64, lossless for binary |
keelson-enclose-from-json / keelson-uncover-to-json |
any well-known subject | the payload as protobuf JSON |
The text and base64 codecs stamp the payload with the current time on enclose and drop the timestamp on uncover.
# NMEA 0183 lines from a UDP feed onto the bus
socat UDP4-RECV:10110,reuseaddr STDOUT \
| zenoh put -k rise/@v0/vessel/pubsub/raw_nmea0183/porla/0 --line '{value}' --encoder keelson-enclose-from-text
# Positions off the bus as JSON
zenoh subscribe -k 'rise/@v0/vessel/pubsub/location_fix/**' --decoder keelson-uncover-to-json
Data put this way is not a full keelson producer: zenoh put declares no liveliness tokens and does not apply the subject's QoS profile from qos.yaml.
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Metadata
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Release files for keelson 0.6.0rc19
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