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# ``twisted`.`internet`.`base`.`ThreadedResolver``

class documentation

`class ThreadedResolver: (source)`

Known subclasses: `twisted.names.client.ThreadedResolver`

Constructor: `ThreadedResolver(reactor)`

Implements interfaces: `twisted.internet.interfaces.IResolverSimple`

View In Hierarchy

`ThreadedResolver` uses a reactor, a threadpool, and `socket.gethostbyname` to perform name lookups without blocking the reactor thread. It also supports timeouts indepedently from whatever timeout logic `socket.gethostbyname` might have.

Method | `__init__` | Undocumented
Method | `getHostByName` | See `twisted.internet.interfaces.IResolverSimple.getHostByName`.
Instance Variable | `reactor` | The reactor the threadpool of which will be used to call `socket.gethostbyname` and the I/O thread of which the result will be delivered.
Method | `_checkTimeout` | Undocumented
Method | `_cleanup` | Undocumented
Method | `_fail` | Undocumented
Instance Variable | `_runningQueries` | Undocumented

def __init__(self, reactor: `ReactorBase`): (source)
overridden in `twisted.names.client.ThreadedResolver`

Undocumented

def getHostByName(self, name: `str`, timeout: `Sequence[int]` = (1, 3, 11, 45)) -> `Deferred[str]`: (source)
from `twisted.internet.interfaces.IResolverSimple`

See `twisted.internet.interfaces.IResolverSimple.getHostByName`.

Note that the elements of `timeout` are summed and the result is used as a timeout for the lookup. Any intermediate timeout or retry logic is left up to the platform via `socket.gethostbyname`.

reactor = (source)

The reactor the threadpool of which will be used to call `socket.gethostbyname` and the I/O thread of which the result will be delivered.

def _checkTimeout(self, result: `Union[str, Failure]`, name: `str`, lookupDeferred: `Deferred[str]`): (source)

Undocumented

def _cleanup(self, name: `str`, lookupDeferred: `Deferred[str]`): (source)

Undocumented

def _fail(self, name: `str`, err: `str`) -> `Failure`: (source)

Undocumented

_runningQueries: `Dict[Deferred[str], Tuple[Deferred[str], IDelayedCall]]` = (source)

Undocumented