39 lines
1.1 KiB
Python
Executable File
39 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Subscribe to a pattern on the local DECNET bus and print events.
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Usage: scripts/bus/sub.py 'topology.>'
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scripts/bus/sub.py 'system.bus.health'
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DECNET_BUS_SOCKET=/tmp/decnet-bus.sock scripts/bus/sub.py 'topology.*.status'
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"""
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from __future__ import annotations
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import asyncio
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import os
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import sys
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from decnet.bus.unix_client import UnixSocketBus
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async def main(pattern: str) -> None:
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sock = os.environ.get("DECNET_BUS_SOCKET", "/tmp/decnet-bus.sock")
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client = UnixSocketBus(sock, client_name="scripts-sub")
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await client.connect()
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sub = client.subscribe(pattern)
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print(f"sub: pattern={pattern!r} socket={sock} (Ctrl-C to stop)", flush=True)
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try:
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async with sub:
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async for ev in sub:
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print(f"{ev.topic} type={ev.type!r} payload={ev.payload}", flush=True)
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finally:
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await client.close()
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if __name__ == "__main__":
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if len(sys.argv) != 2:
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print("Usage: sub.py <pattern>", file=sys.stderr)
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sys.exit(2)
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try:
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asyncio.run(main(sys.argv[1]))
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except KeyboardInterrupt:
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pass
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