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import redis
from redis._parsers.helpers import bool_ok
from ..helpers import get_protocol_version, parse_to_list
from .commands import (
ALTER_CMD,
CREATE_CMD,
CREATERULE_CMD,
DEL_CMD,
DELETERULE_CMD,
GET_CMD,
INFO_CMD,
MGET_CMD,
MRANGE_CMD,
MREVRANGE_CMD,
QUERYINDEX_CMD,
RANGE_CMD,
REVRANGE_CMD,
TimeSeriesCommands,
)
from .info import TSInfo
from .utils import parse_get, parse_m_get, parse_m_range, parse_range
class TimeSeries(TimeSeriesCommands):
"""
This class subclasses redis-py's `Redis` and implements RedisTimeSeries's
commands (prefixed with "ts").
The client allows to interact with RedisTimeSeries and use all of it's
functionality.
"""
def __init__(self, client=None, **kwargs):
"""Create a new RedisTimeSeries client."""
# Set the module commands' callbacks
self._MODULE_CALLBACKS = {
ALTER_CMD: bool_ok,
CREATE_CMD: bool_ok,
CREATERULE_CMD: bool_ok,
DELETERULE_CMD: bool_ok,
}
_RESP2_MODULE_CALLBACKS = {
DEL_CMD: int,
GET_CMD: parse_get,
INFO_CMD: TSInfo,
MGET_CMD: parse_m_get,
MRANGE_CMD: parse_m_range,
MREVRANGE_CMD: parse_m_range,
RANGE_CMD: parse_range,
REVRANGE_CMD: parse_range,
QUERYINDEX_CMD: parse_to_list,
}
_RESP3_MODULE_CALLBACKS = {}
self.client = client
self.execute_command = client.execute_command
if get_protocol_version(self.client) in ["3", 3]:
self._MODULE_CALLBACKS.update(_RESP3_MODULE_CALLBACKS)
else:
self._MODULE_CALLBACKS.update(_RESP2_MODULE_CALLBACKS)
for k, v in self._MODULE_CALLBACKS.items():
self.client.set_response_callback(k, v)
def pipeline(self, transaction=True, shard_hint=None):
"""Creates a pipeline for the TimeSeries module, that can be used
for executing only TimeSeries commands and core commands.
Usage example:
r = redis.Redis()
pipe = r.ts().pipeline()
for i in range(100):
pipeline.add("with_pipeline", i, 1.1 * i)
pipeline.execute()
"""
if isinstance(self.client, redis.RedisCluster):
p = ClusterPipeline(
nodes_manager=self.client.nodes_manager,
commands_parser=self.client.commands_parser,
startup_nodes=self.client.nodes_manager.startup_nodes,
result_callbacks=self.client.result_callbacks,
cluster_response_callbacks=self.client.cluster_response_callbacks,
cluster_error_retry_attempts=self.client.retry.get_retries(),
read_from_replicas=self.client.read_from_replicas,
reinitialize_steps=self.client.reinitialize_steps,
lock=self.client._lock,
)
else:
p = Pipeline(
connection_pool=self.client.connection_pool,
response_callbacks=self._MODULE_CALLBACKS,
transaction=transaction,
shard_hint=shard_hint,
)
return p
class ClusterPipeline(TimeSeriesCommands, redis.cluster.ClusterPipeline):
"""Cluster pipeline for the module."""
class Pipeline(TimeSeriesCommands, redis.client.Pipeline):
"""Pipeline for the module."""
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