Initial commit (Clean history)
This commit is contained in:
anhduy-tech
@@ -0,0 +1,6 @@
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from django_redis.client.default import DefaultClient
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from django_redis.client.herd import HerdClient
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from django_redis.client.sentinel import SentinelClient
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from django_redis.client.sharded import ShardClient
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__all__ = ["DefaultClient", "HerdClient", "SentinelClient", "ShardClient"]
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Load Diff
@@ -0,0 +1,169 @@
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import random
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import socket
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import time
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from collections import OrderedDict
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from django.conf import settings
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from redis.exceptions import ConnectionError as RedisConnectionError
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from redis.exceptions import ResponseError
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from redis.exceptions import TimeoutError as RedisTimeoutError
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from django_redis.client.default import DEFAULT_TIMEOUT, DefaultClient
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from django_redis.exceptions import ConnectionInterrupted
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_main_exceptions = (
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RedisConnectionError,
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RedisTimeoutError,
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ResponseError,
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socket.timeout,
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)
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class Marker:
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"""
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Dummy class for use as
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marker for herded keys.
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"""
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pass
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def _is_expired(x, herd_timeout: int) -> bool:
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if x >= herd_timeout:
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return True
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val = x + random.randint(1, herd_timeout)
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return val >= herd_timeout
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class HerdClient(DefaultClient):
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def __init__(self, *args, **kwargs):
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self._marker = Marker()
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self._herd_timeout = getattr(settings, "CACHE_HERD_TIMEOUT", 60)
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super().__init__(*args, **kwargs)
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def _pack(self, value, timeout):
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herd_timeout = (timeout or self._backend.default_timeout) + int(time.time())
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return self._marker, value, herd_timeout
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def _unpack(self, value):
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try:
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marker, unpacked, herd_timeout = value
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except (ValueError, TypeError):
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return value, False
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if not isinstance(marker, Marker):
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return value, False
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now = int(time.time())
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if herd_timeout < now:
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x = now - herd_timeout
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return unpacked, _is_expired(x, self._herd_timeout)
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return unpacked, False
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def set(
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self,
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key,
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value,
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timeout=DEFAULT_TIMEOUT,
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version=None,
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client=None,
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nx=False,
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xx=False,
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):
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if timeout is DEFAULT_TIMEOUT:
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timeout = self._backend.default_timeout
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if timeout is None or timeout <= 0:
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return super().set(
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key,
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value,
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timeout=timeout,
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version=version,
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client=client,
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nx=nx,
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xx=xx,
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)
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packed = self._pack(value, timeout)
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real_timeout = timeout + self._herd_timeout
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return super().set(
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key, packed, timeout=real_timeout, version=version, client=client, nx=nx
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)
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def get(self, key, default=None, version=None, client=None):
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packed = super().get(key, default=default, version=version, client=client)
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val, refresh = self._unpack(packed)
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if refresh:
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return default
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return val
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def get_many(self, keys, version=None, client=None):
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if client is None:
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client = self.get_client(write=False)
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if not keys:
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return {}
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recovered_data = OrderedDict()
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new_keys = [self.make_key(key, version=version) for key in keys]
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map_keys = dict(zip(new_keys, keys))
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try:
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results = client.mget(*new_keys)
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except _main_exceptions as e:
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raise ConnectionInterrupted(connection=client) from e
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for key, value in zip(new_keys, results):
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if value is None:
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continue
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val, refresh = self._unpack(self.decode(value))
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recovered_data[map_keys[key]] = None if refresh else val
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return recovered_data
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def set_many(
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self, data, timeout=DEFAULT_TIMEOUT, version=None, client=None, herd=True
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):
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"""
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Set a bunch of values in the cache at once from a dict of key/value
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pairs. This is much more efficient than calling set() multiple times.
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If timeout is given, that timeout will be used for the key; otherwise
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the default cache timeout will be used.
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"""
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if client is None:
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client = self.get_client(write=True)
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set_function = self.set if herd else super().set
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try:
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pipeline = client.pipeline()
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for key, value in data.items():
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set_function(key, value, timeout, version=version, client=pipeline)
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pipeline.execute()
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except _main_exceptions as e:
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raise ConnectionInterrupted(connection=client) from e
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def incr(self, *args, **kwargs):
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raise NotImplementedError
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def decr(self, *args, **kwargs):
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raise NotImplementedError
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def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None, client=None):
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if client is None:
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client = self.get_client(write=True)
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value = self.get(key, version=version, client=client)
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if value is None:
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return False
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self.set(key, value, timeout=timeout, version=version, client=client)
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return True
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@@ -0,0 +1,42 @@
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from urllib.parse import parse_qs, urlencode, urlparse, urlunparse
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from django.core.exceptions import ImproperlyConfigured
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from redis.sentinel import SentinelConnectionPool
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from django_redis.client.default import DefaultClient
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def replace_query(url, query):
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return urlunparse((*url[:4], urlencode(query, doseq=True), url[5]))
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class SentinelClient(DefaultClient):
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"""
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Sentinel client which uses the single redis URL specified by the CACHE's
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LOCATION to create a LOCATION configuration for two connection pools; One
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pool for the primaries and another pool for the replicas, and upon
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connecting ensures the connection pool factory is configured correctly.
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"""
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def __init__(self, server, params, backend):
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if isinstance(server, str):
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url = urlparse(server)
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primary_query = parse_qs(url.query, keep_blank_values=True)
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replica_query = dict(primary_query)
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primary_query["is_master"] = [1]
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replica_query["is_master"] = [0]
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server = [replace_query(url, i) for i in (primary_query, replica_query)]
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super().__init__(server, params, backend)
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def connect(self, *args, **kwargs):
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connection = super().connect(*args, **kwargs)
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if not isinstance(connection.connection_pool, SentinelConnectionPool):
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error_message = (
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"Settings DJANGO_REDIS_CONNECTION_FACTORY or "
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"CACHE[].OPTIONS.CONNECTION_POOL_CLASS is not configured correctly."
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)
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raise ImproperlyConfigured(error_message)
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return connection
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@@ -0,0 +1,487 @@
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import builtins
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import re
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from collections import OrderedDict
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from collections.abc import Iterator
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from datetime import datetime
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from typing import Any, Optional, Union
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from redis import Redis
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from redis.exceptions import ConnectionError as RedisConnectionError
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from redis.typing import KeyT
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from django_redis.client.default import DEFAULT_TIMEOUT, DefaultClient
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from django_redis.exceptions import ConnectionInterrupted
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from django_redis.hash_ring import HashRing
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from django_redis.util import CacheKey
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class ShardClient(DefaultClient):
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_findhash = re.compile(r".*\{(.*)\}.*", re.I)
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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if not isinstance(self._server, (list, tuple)):
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self._server = [self._server]
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self._ring = HashRing(self._server)
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self._serverdict = self.connect()
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def get_client(self, *args, **kwargs):
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raise NotImplementedError
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def connect(self, index=0):
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connection_dict = {}
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for name in self._server:
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connection_dict[name] = self.connection_factory.connect(name)
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return connection_dict
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def get_server_name(self, _key):
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key = str(_key)
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g = self._findhash.match(key)
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if g is not None and len(g.groups()) > 0:
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key = g.groups()[0]
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return self._ring.get_node(key)
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def get_server(self, key):
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name = self.get_server_name(key)
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return self._serverdict[name]
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def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None, client=None):
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().add(
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key=key, value=value, version=version, client=client, timeout=timeout
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)
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def get(self, key, default=None, version=None, client=None):
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().get(key=key, default=default, version=version, client=client)
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def get_many(self, keys, version=None):
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if not keys:
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return {}
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recovered_data = OrderedDict()
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new_keys = [self.make_key(key, version=version) for key in keys]
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map_keys = dict(zip(new_keys, keys))
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for key in new_keys:
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client = self.get_server(key)
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value = self.get(key=key, version=version, client=client)
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if value is None:
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continue
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recovered_data[map_keys[key]] = value
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return recovered_data
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def set(
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self,
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key,
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value,
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timeout=DEFAULT_TIMEOUT,
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version=None,
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client=None,
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nx=False,
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xx=False,
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):
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"""
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Persist a value to the cache, and set an optional expiration time.
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"""
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().set(
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key=key,
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value=value,
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timeout=timeout,
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version=version,
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client=client,
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nx=nx,
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xx=xx,
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)
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def set_many(self, data, timeout=DEFAULT_TIMEOUT, version=None, client=None):
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"""
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Set a bunch of values in the cache at once from a dict of key/value
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pairs. This is much more efficient than calling set() multiple times.
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|
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If timeout is given, that timeout will be used for the key; otherwise
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the default cache timeout will be used.
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"""
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for key, value in data.items():
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self.set(key, value, timeout, version=version, client=client)
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def has_key(self, key, version=None, client=None):
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"""
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Test if key exists.
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"""
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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key = self.make_key(key, version=version)
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try:
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return client.exists(key) == 1
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except RedisConnectionError as e:
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raise ConnectionInterrupted(connection=client) from e
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def delete(self, key, version=None, client=None):
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().delete(key=key, version=version, client=client)
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def ttl(self, key, version=None, client=None):
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"""
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Executes TTL redis command and return the "time-to-live" of specified key.
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If key is a non volatile key, it returns None.
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"""
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().ttl(key=key, version=version, client=client)
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def pttl(self, key, version=None, client=None):
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"""
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Executes PTTL redis command and return the "time-to-live" of specified key
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in milliseconds. If key is a non volatile key, it returns None.
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"""
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().pttl(key=key, version=version, client=client)
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def persist(self, key, version=None, client=None):
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().persist(key=key, version=version, client=client)
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def expire(self, key, timeout, version=None, client=None):
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().expire(key=key, timeout=timeout, version=version, client=client)
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def pexpire(self, key, timeout, version=None, client=None):
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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return super().pexpire(key=key, timeout=timeout, version=version, client=client)
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def pexpire_at(self, key, when: Union[datetime, int], version=None, client=None):
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"""
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Set an expire flag on a ``key`` to ``when`` on a shard client.
|
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``when`` which can be represented as an integer indicating unix
|
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time or a Python datetime object.
|
||||
"""
|
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if client is None:
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key = self.make_key(key, version=version)
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client = self.get_server(key)
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|
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return super().pexpire_at(key=key, when=when, version=version, client=client)
|
||||
|
||||
def expire_at(self, key, when: Union[datetime, int], version=None, client=None):
|
||||
"""
|
||||
Set an expire flag on a ``key`` to ``when`` on a shard client.
|
||||
``when`` which can be represented as an integer indicating unix
|
||||
time or a Python datetime object.
|
||||
"""
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
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||||
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return super().expire_at(key=key, when=when, version=version, client=client)
|
||||
|
||||
def lock(
|
||||
self,
|
||||
key,
|
||||
version=None,
|
||||
timeout=None,
|
||||
sleep=0.1,
|
||||
blocking_timeout=None,
|
||||
client=None,
|
||||
thread_local=True,
|
||||
):
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
|
||||
key = self.make_key(key, version=version)
|
||||
return super().lock(
|
||||
key,
|
||||
timeout=timeout,
|
||||
sleep=sleep,
|
||||
client=client,
|
||||
blocking_timeout=blocking_timeout,
|
||||
thread_local=thread_local,
|
||||
)
|
||||
|
||||
def delete_many(self, keys, version=None):
|
||||
"""
|
||||
Remove multiple keys at once.
|
||||
"""
|
||||
res = 0
|
||||
for key in [self.make_key(k, version=version) for k in keys]:
|
||||
client = self.get_server(key)
|
||||
res += self.delete(key, client=client)
|
||||
return res
|
||||
|
||||
def incr_version(self, key, delta=1, version=None, client=None):
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
|
||||
if version is None:
|
||||
version = self._backend.version
|
||||
|
||||
old_key = self.make_key(key, version)
|
||||
value = self.get(old_key, version=version, client=client)
|
||||
|
||||
try:
|
||||
ttl = self.ttl(old_key, version=version, client=client)
|
||||
except RedisConnectionError as e:
|
||||
raise ConnectionInterrupted(connection=client) from e
|
||||
|
||||
if value is None:
|
||||
msg = f"Key '{key}' not found"
|
||||
raise ValueError(msg)
|
||||
|
||||
if isinstance(key, CacheKey):
|
||||
new_key = self.make_key(key.original_key(), version=version + delta)
|
||||
else:
|
||||
new_key = self.make_key(key, version=version + delta)
|
||||
|
||||
self.set(new_key, value, timeout=ttl, client=self.get_server(new_key))
|
||||
self.delete(old_key, client=client)
|
||||
return version + delta
|
||||
|
||||
def incr(self, key, delta=1, version=None, client=None):
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
|
||||
return super().incr(key=key, delta=delta, version=version, client=client)
|
||||
|
||||
def decr(self, key, delta=1, version=None, client=None):
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
|
||||
return super().decr(key=key, delta=delta, version=version, client=client)
|
||||
|
||||
def iter_keys(self, key, version=None):
|
||||
error_message = "iter_keys not supported on sharded client"
|
||||
raise NotImplementedError(error_message)
|
||||
|
||||
def keys(self, search, version=None):
|
||||
pattern = self.make_pattern(search, version=version)
|
||||
keys = []
|
||||
try:
|
||||
for connection in self._serverdict.values():
|
||||
keys.extend(connection.keys(pattern))
|
||||
except RedisConnectionError as e:
|
||||
# FIXME: technically all clients should be passed as `connection`.
|
||||
client = self.get_server(pattern)
|
||||
raise ConnectionInterrupted(connection=client) from e
|
||||
|
||||
return [self.reverse_key(k.decode()) for k in keys]
|
||||
|
||||
def delete_pattern(
|
||||
self, pattern, version=None, client=None, itersize=None, prefix=None
|
||||
):
|
||||
"""
|
||||
Remove all keys matching pattern.
|
||||
"""
|
||||
pattern = self.make_pattern(pattern, version=version, prefix=prefix)
|
||||
kwargs = {"match": pattern}
|
||||
if itersize:
|
||||
kwargs["count"] = itersize
|
||||
|
||||
keys = []
|
||||
for connection in self._serverdict.values():
|
||||
keys.extend(key for key in connection.scan_iter(**kwargs))
|
||||
|
||||
res = 0
|
||||
if keys:
|
||||
for connection in self._serverdict.values():
|
||||
res += connection.delete(*keys)
|
||||
return res
|
||||
|
||||
def do_close_clients(self):
|
||||
for client in self._serverdict.values():
|
||||
self.disconnect(client=client)
|
||||
|
||||
def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None, client=None):
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
|
||||
return super().touch(key=key, timeout=timeout, version=version, client=client)
|
||||
|
||||
def clear(self, client=None):
|
||||
for connection in self._serverdict.values():
|
||||
connection.flushdb()
|
||||
|
||||
def sadd(
|
||||
self,
|
||||
key: KeyT,
|
||||
*values: Any,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> int:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().sadd(key, *values, version=version, client=client)
|
||||
|
||||
def scard(
|
||||
self,
|
||||
key: KeyT,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> int:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().scard(key=key, version=version, client=client)
|
||||
|
||||
def smembers(
|
||||
self,
|
||||
key: KeyT,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> builtins.set[Any]:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().smembers(key=key, version=version, client=client)
|
||||
|
||||
def smove(
|
||||
self,
|
||||
source: KeyT,
|
||||
destination: KeyT,
|
||||
member: Any,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
):
|
||||
if client is None:
|
||||
source = self.make_key(source, version=version)
|
||||
client = self.get_server(source)
|
||||
destination = self.make_key(destination, version=version)
|
||||
|
||||
return super().smove(
|
||||
source=source,
|
||||
destination=destination,
|
||||
member=member,
|
||||
version=version,
|
||||
client=client,
|
||||
)
|
||||
|
||||
def srem(
|
||||
self,
|
||||
key: KeyT,
|
||||
*members,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> int:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().srem(key, *members, version=version, client=client)
|
||||
|
||||
def sscan(
|
||||
self,
|
||||
key: KeyT,
|
||||
match: Optional[str] = None,
|
||||
count: Optional[int] = 10,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> builtins.set[Any]:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().sscan(
|
||||
key=key, match=match, count=count, version=version, client=client
|
||||
)
|
||||
|
||||
def sscan_iter(
|
||||
self,
|
||||
key: KeyT,
|
||||
match: Optional[str] = None,
|
||||
count: Optional[int] = 10,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> Iterator[Any]:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().sscan_iter(
|
||||
key=key, match=match, count=count, version=version, client=client
|
||||
)
|
||||
|
||||
def srandmember(
|
||||
self,
|
||||
key: KeyT,
|
||||
count: Optional[int] = None,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> Union[builtins.set, Any]:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().srandmember(key=key, count=count, version=version, client=client)
|
||||
|
||||
def sismember(
|
||||
self,
|
||||
key: KeyT,
|
||||
member: Any,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> bool:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().sismember(key, member, version=version, client=client)
|
||||
|
||||
def spop(
|
||||
self,
|
||||
key: KeyT,
|
||||
count: Optional[int] = None,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> Union[builtins.set, Any]:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().spop(key=key, count=count, version=version, client=client)
|
||||
|
||||
def smismember(
|
||||
self,
|
||||
key: KeyT,
|
||||
*members,
|
||||
version: Optional[int] = None,
|
||||
client: Optional[Redis] = None,
|
||||
) -> list[bool]:
|
||||
if client is None:
|
||||
key = self.make_key(key, version=version)
|
||||
client = self.get_server(key)
|
||||
return super().smismember(key, *members, version=version, client=client)
|
||||
Reference in New Issue
Block a user