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# frozen_string_literal: true
require 'redis_client/cluster/concurrent_worker'
require 'redis_client/cluster/pipeline'
require 'redis_client/cluster/pub_sub'
require 'redis_client/cluster/router'
require 'redis_client/cluster/transaction'
require 'redis_client/cluster/optimistic_locking'
class RedisClient
class Cluster
ZERO_CURSOR_FOR_SCAN = '0'
attr_reader :config
def initialize(config, pool: nil, concurrency: nil, **kwargs)
@config = config
@concurrent_worker = ::RedisClient::Cluster::ConcurrentWorker.create(**(concurrency || {}))
@command_builder = config.command_builder
@pool = pool
@kwargs = kwargs
@router = nil
@mutex = Mutex.new
end
def inspect
node_keys = @router.nil? ? @config.startup_nodes.keys : router.node_keys
"#<#{self.class.name} #{node_keys.join(', ')}>"
end
def call(*args, **kwargs, &block)
command = @command_builder.generate(args, kwargs)
router.send_command(:call_v, command, &block)
end
def call_v(command, &block)
command = @command_builder.generate(command)
router.send_command(:call_v, command, &block)
end
def call_once(*args, **kwargs, &block)
command = @command_builder.generate(args, kwargs)
router.send_command(:call_once_v, command, &block)
end
def call_once_v(command, &block)
command = @command_builder.generate(command)
router.send_command(:call_once_v, command, &block)
end
def blocking_call(timeout, *args, **kwargs, &block)
command = @command_builder.generate(args, kwargs)
router.send_command(:blocking_call_v, command, timeout, &block)
end
def blocking_call_v(timeout, command, &block)
command = @command_builder.generate(command)
router.send_command(:blocking_call_v, command, timeout, &block)
end
def scan(*args, **kwargs, &block)
raise ArgumentError, 'block required' unless block
seed = Random.new_seed
cursor = ZERO_CURSOR_FOR_SCAN
loop do
cursor, keys = router.scan('SCAN', cursor, *args, seed: seed, **kwargs)
keys.each(&block)
break if cursor == ZERO_CURSOR_FOR_SCAN
end
end
def sscan(key, *args, **kwargs, &block)
node = router.assign_node(['SSCAN', key])
router.try_delegate(node, :sscan, key, *args, **kwargs, &block)
end
def hscan(key, *args, **kwargs, &block)
node = router.assign_node(['HSCAN', key])
router.try_delegate(node, :hscan, key, *args, **kwargs, &block)
end
def zscan(key, *args, **kwargs, &block)
node = router.assign_node(['ZSCAN', key])
router.try_delegate(node, :zscan, key, *args, **kwargs, &block)
end
def pipelined(exception: true)
seed = @config.use_replica? && @config.replica_affinity == :random ? nil : Random.new_seed
pipeline = ::RedisClient::Cluster::Pipeline.new(
router,
@command_builder,
@concurrent_worker,
exception: exception,
seed: seed
)
yield pipeline
return [] if pipeline.empty?
pipeline.execute
end
def multi(watch: nil)
if watch.nil? || watch.empty?
transaction = ::RedisClient::Cluster::Transaction.new(router, @command_builder)
yield transaction
return transaction.execute
end
::RedisClient::Cluster::OptimisticLocking.new(router).watch(watch) do |c, slot, asking|
transaction = ::RedisClient::Cluster::Transaction.new(
router, @command_builder, node: c, slot: slot, asking: asking
)
yield transaction
transaction.execute
end
end
def pubsub
::RedisClient::Cluster::PubSub.new(router, @command_builder)
end
def with(...)
raise NotImplementedError, 'No way to use'
end
def close
@router&.close
@concurrent_worker.close
nil
end
private
def router
return @router unless @router.nil?
@mutex.synchronize do
@router ||= ::RedisClient::Cluster::Router.new(@config, @concurrent_worker, pool: @pool, **@kwargs)
end
end
def method_missing(name, *args, **kwargs, &block)
if router.command_exists?(name)
args.unshift(name)
command = @command_builder.generate(args, kwargs)
return router.send_command(:call_v, command, &block)
end
super
end
def respond_to_missing?(name, include_private = false)
return true if router.command_exists?(name)
super
end
end
end
|
