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"""An async transport method for statsd communication."""
import asyncio
import socket
from typing import Optional
from statsd.client.base import StatsClientBase
from botcore.utils import scheduling
class AsyncStatsClient(StatsClientBase):
"""An async implementation of :obj:`statsd.client.base.StatsClientBase` that supports async stat communication."""
def __init__(
self,
loop: asyncio.AbstractEventLoop,
host: str = 'localhost',
port: int = 8125,
prefix: str = None
):
"""
Create a new :obj:`AsyncStatsClient`.
Args:
loop (asyncio.AbstractEventLoop): The event loop to use when creating the
:obj:`asyncio.loop.create_datagram_endpoint`.
host: The host to connect to.
port: The port to connect to.
prefix: The prefix to use for all stats.
"""
_, _, _, _, addr = socket.getaddrinfo(
host, port, socket.AF_INET, socket.SOCK_DGRAM
)[0]
self._addr = addr
self._prefix = prefix
self._loop = loop
self._transport: Optional[asyncio.DatagramTransport] = None
async def create_socket(self) -> None:
"""Use :obj:`asyncio.loop.create_datagram_endpoint` from the loop given on init to create a socket."""
self._transport, _ = await self._loop.create_datagram_endpoint(
asyncio.DatagramProtocol,
family=socket.AF_INET,
remote_addr=self._addr
)
def _send(self, data: str) -> None:
"""Start an async task to send data to statsd."""
scheduling.create_task(self._async_send(data), event_loop=self._loop)
async def _async_send(self, data: str) -> None:
"""Send data to the statsd server using the async transport."""
self._transport.sendto(data.encode('ascii'), self._addr)
__all__ = ['AsyncStatsClient']
|
