dns.resolver.Cache

Package dns :: Module resolver :: Class Cache

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Type Cache

object --+
         |
        Cache

Simple DNS answer cache.

Method Summary
	`__init__(self, cleaning_interval)` Initialize a DNS cache.
	`flush(self, key)` Flush the cache.
dns.resolver.Answer object or None	`get(self, key)` Get the answer associated with key.
	`maybe_clean(self)` Clean the cache if it's time to do so.
	`put(self, key, value)` Associate key and value in the cache.
Inherited from object
	`__delattr__(...)` x.__delattr__('name') <==> del x.name
	`__getattribute__(...)` x.__getattribute__('name') <==> x.name
	`__hash__(x)` x.__hash__() <==> hash(x)
	`__new__(T, S, ...)` T.__new__(S, ...) -> a new object with type S, a subtype of T
	`__reduce__(...)` helper for pickle
	`__reduce_ex__(...)` helper for pickle
	`__repr__(x)` x.__repr__() <==> repr(x)
	`__setattr__(...)` x.__setattr__('name', value) <==> x.name = value
	`__str__(x)` x.__str__() <==> str(x)

Instance Variable Summary
float	`cleaning_interval`: The number of seconds between cleanings.
dict	`data`: A dictionary of cached data
float	`next_cleaning`: The time the cache should next be cleaned (in seconds since the epoch.)

Method Details

Initialize a DNS cache.

Parameters:: cleaning_interval - the number of seconds between periodic cleanings. The default is 300.0
(type=float.)

Flush the cache.

If key is specified, only that item is flushed. Otherwise the entire cache is flushed.

Parameters:: key - the key to flush
(type=(dns.name.Name, int, int) tuple or None)

Get the answer associated with key. Returns None if no answer is cached for the key.

Parameters:: key - the key
(type=(dns.name.Name, int, int) tuple whose values are the query name, rdtype, and rdclass.)

Clean the cache if it's time to do so.

Associate key and value in the cache.

Parameters:: key - the key
(type=(dns.name.Name, int, int) tuple whose values are the query name, rdtype, and rdclass.); value - The answer being cached
(type=dns.resolver.Answer object)

Instance Variable Details

The number of seconds between cleanings. The default is 300 (5 minutes).

A dictionary of cached data

The time the cache should next be cleaned (in seconds since the epoch.)

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