Advanced

async with Manager("192.168.1.1") as mgr:
    # max_repetitions: how many rows per request
    results = await mgr.get_bulk(
        "1.3.6.1.2.1.2.2.1.1",
        max_repetitions=50,  # Default: 10
        non_repeaters=0,
    )

# Large tables: bigger batches, fewer round-trips
async for oid, value in mgr.bulk_walk("1.3.6.1.2.1.2.2", bulk_size=50):
    pass
 
# Small tables or slow devices: smaller batches
async for oid, value in mgr.bulk_walk("1.3.6.1.2.1.2.2", bulk_size=10):
    pass

from snmpkit.manager import PollTarget, PollResult, poll_many
 
targets = [
    PollTarget(host="10.0.0.1"),
    PollTarget(host="10.0.0.2", community="private"),
    PollTarget(host="10.0.0.3", port=1161, timeout=10.0),
]
 
oids = ["1.3.6.1.2.1.1.1.0", "1.3.6.1.2.1.1.3.0"]
 
async for result in poll_many(targets, oids, concurrency=50):
    if result.error:
        print(f"{result.target}: {result.error}")
    else:
        print(f"{result.target}: {result.oid} = {result.value}")

@dataclass
class PollTarget:
    host: str
    port: int = 161
    community: str = "public"
    version: int = 2
    # v3 fields
    user: str | None = None
    auth_protocol: str | None = None
    auth_password: str | None = None
    priv_protocol: str | None = None
    priv_password: str | None = None
    timeout: float = 5.0
    retries: int = 3

@dataclass
class PollResult:
    target: str           # "host:port"
    oid: str              # OID that was queried
    value: Value | None   # Value if successful
    error: str | None     # Error message if failed

async def poll_devices(hosts: list[str], max_concurrent: int = 50):
    semaphore = asyncio.Semaphore(max_concurrent)
 
    async def poll_one(host: str):
        async with semaphore:
            async with Manager(host, timeout=2.0) as mgr:
                return await mgr.get("1.3.6.1.2.1.1.1.0")
 
    return await asyncio.gather(*[poll_one(h) for h in hosts], return_exceptions=True)

import logging
 
logging.basicConfig(level=logging.DEBUG)
logging.getLogger("snmpkit").setLevel(logging.DEBUG)

import asyncio
import signal
 
async def main():
    mgr = Manager("192.168.1.1")
    await mgr.connect()
 
    shutdown_event = asyncio.Event()
 
    def signal_handler():
        shutdown_event.set()
 
    loop = asyncio.get_event_loop()
    for sig in (signal.SIGTERM, signal.SIGINT):
        loop.add_signal_handler(sig, signal_handler)
 
    try:
        while not shutdown_event.is_set():
            value = await mgr.get("1.3.6.1.2.1.1.3.0")
            print(f"Uptime: {value}")
            await asyncio.sleep(60)
    finally:
        await mgr.close()

async def stream_walk(host: str, oid: str):
    async with Manager(host) as mgr:
        async for oid, value in mgr.bulk_walk(oid):
            yield (oid, value)
 
# Use as async generator
async for oid, value in stream_walk("192.168.1.1", "1.3.6.1.2.1.2.2"):
    process(oid, value)

# Bad: loads entire table into memory
results = []
async for oid, value in mgr.bulk_walk("1.3.6.1.2.1.4.22"):
    results.append((oid, value))
 
# Good: process as you go
async for oid, value in mgr.bulk_walk("1.3.6.1.2.1.4.22"):
    await write_to_database(oid, value)

# Bad: shared manager across threads
mgr = Manager("192.168.1.1")
 
# Good: create manager in each task
async def worker(host: str):
    async with Manager(host) as mgr:
        return await mgr.get(...)