Class: RedisClient::Cluster::Router
- Inherits:
-
Object
- Object
- RedisClient::Cluster::Router
- Defined in:
- lib/redis_client/cluster/router.rb
Constant Summary collapse
- ZERO_CURSOR_FOR_SCAN =
'0'
- TSF =
->(f, x) { f.nil? ? x : f.call(x) }.curry
Instance Method Summary collapse
- #assign_asking_node(err_msg) ⇒ Object
- #assign_node(command) ⇒ Object
- #assign_redirection_node(err_msg) ⇒ Object
- #close ⇒ Object
- #command_exists?(name) ⇒ Boolean
- #find_node(node_key, retry_count: 3) ⇒ Object
- #find_node_key(command, seed: nil) ⇒ Object
- #find_node_key_by_key(key, seed: nil, primary: false) ⇒ Object
- #find_primary_node_by_slot(slot) ⇒ Object
- #find_primary_node_key(command) ⇒ Object
- #find_slot(command) ⇒ Object
- #find_slot_by_key(key) ⇒ Object
-
#handle_redirection(node, retry_count:) ⇒ Object
rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity.
-
#initialize(config, concurrent_worker, pool: nil, **kwargs) ⇒ Router
constructor
A new instance of Router.
- #node_keys ⇒ Object
-
#scan(*command, seed: nil, **kwargs) ⇒ Object
rubocop:disable Metrics/AbcSize.
-
#send_command(method, command, *args, &block) ⇒ Object
rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity.
- #try_delegate(node, method, *args, retry_count: 3, **kwargs, &block) ⇒ Object
- #try_send(node, method, command, args, retry_count: 3, &block) ⇒ Object
Constructor Details
#initialize(config, concurrent_worker, pool: nil, **kwargs) ⇒ Router
Returns a new instance of Router.
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# File 'lib/redis_client/cluster/router.rb', line 20 def initialize(config, concurrent_worker, pool: nil, **kwargs) @config = config.dup @original_config = config.dup if config.connect_with_original_config @connect_with_original_config = config.connect_with_original_config @concurrent_worker = concurrent_worker @pool = pool @client_kwargs = kwargs @node = ::RedisClient::Cluster::Node.new(concurrent_worker, config: config, pool: pool, **kwargs) update_cluster_info! @command = ::RedisClient::Cluster::Command.load(@node.replica_clients.shuffle, slow_command_timeout: config.slow_command_timeout) @command_builder = @config.command_builder end |
Instance Method Details
#assign_asking_node(err_msg) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 216 def assign_asking_node(err_msg) _, _, node_key = err_msg.split find_node(node_key) end |
#assign_node(command) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 154 def assign_node(command) node_key = find_node_key(command) find_node(node_key) end |
#assign_redirection_node(err_msg) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 209 def assign_redirection_node(err_msg) _, slot, node_key = err_msg.split slot = slot.to_i @node.update_slot(slot, node_key) find_node(node_key) end |
#close ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 225 def close @node.each(&:close) end |
#command_exists?(name) ⇒ Boolean
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# File 'lib/redis_client/cluster/router.rb', line 205 def command_exists?(name) @command.exists?(name) end |
#find_node(node_key, retry_count: 3) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 195 def find_node(node_key, retry_count: 3) @node.find_by(node_key) rescue ::RedisClient::Cluster::Node::ReloadNeeded raise ::RedisClient::Cluster::NodeMightBeDown if retry_count <= 0 update_cluster_info! retry_count -= 1 retry end |
#find_node_key(command, seed: nil) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 173 def find_node_key(command, seed: nil) key = @command.extract_first_key(command) find_node_key_by_key(key, seed: seed, primary: @command.should_send_to_primary?(command)) end |
#find_node_key_by_key(key, seed: nil, primary: false) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 159 def find_node_key_by_key(key, seed: nil, primary: false) if key && !key.empty? slot = ::RedisClient::Cluster::KeySlotConverter.convert(key) primary ? @node.find_node_key_of_primary(slot) : @node.find_node_key_of_replica(slot) else primary ? @node.any_primary_node_key(seed: seed) : @node.any_replica_node_key(seed: seed) end end |
#find_primary_node_by_slot(slot) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 168 def find_primary_node_by_slot(slot) node_key = @node.find_node_key_of_primary(slot) find_node(node_key) end |
#find_primary_node_key(command) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 178 def find_primary_node_key(command) key = @command.extract_first_key(command) return nil unless key&.size&.> 0 find_node_key_by_key(key, primary: true) end |
#find_slot(command) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 185 def find_slot(command) find_slot_by_key(@command.extract_first_key(command)) end |
#find_slot_by_key(key) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 189 def find_slot_by_key(key) return if key.empty? ::RedisClient::Cluster::KeySlotConverter.convert(key) end |
#handle_redirection(node, retry_count:) ⇒ Object
rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
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# File 'lib/redis_client/cluster/router.rb', line 95 def handle_redirection(node, retry_count:) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity yield node rescue ::RedisClient::CircuitBreaker::OpenCircuitError raise rescue ::RedisClient::CommandError => e raise unless ErrorIdentification.client_owns_error?(e, node) if e..start_with?('MOVED') node = assign_redirection_node(e.) retry_count -= 1 retry if retry_count >= 0 elsif e..start_with?('ASK') node = assign_asking_node(e.) retry_count -= 1 if retry_count >= 0 node.call('ASKING') retry end elsif e..start_with?('CLUSTERDOWN Hash slot not served') update_cluster_info! retry_count -= 1 retry if retry_count >= 0 end raise rescue ::RedisClient::ConnectionError => e raise unless ErrorIdentification.client_owns_error?(e, node) update_cluster_info! raise if retry_count <= 0 retry_count -= 1 retry end |
#node_keys ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 221 def node_keys @node.node_keys end |
#scan(*command, seed: nil, **kwargs) ⇒ Object
rubocop:disable Metrics/AbcSize
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# File 'lib/redis_client/cluster/router.rb', line 130 def scan(*command, seed: nil, **kwargs) # rubocop:disable Metrics/AbcSize command = @command_builder.generate(command, kwargs) command[1] = ZERO_CURSOR_FOR_SCAN if command.size == 1 input_cursor = Integer(command[1]) client_index = input_cursor % 256 raw_cursor = input_cursor >> 8 clients = @node.clients_for_scanning(seed: seed) client = clients[client_index] return [ZERO_CURSOR_FOR_SCAN, []] unless client command[1] = raw_cursor.to_s result_cursor, result_keys = client.call_v(command) result_cursor = Integer(result_cursor) client_index += 1 if result_cursor == 0 [((result_cursor << 8) + client_index).to_s, result_keys] end |
#send_command(method, command, *args, &block) ⇒ Object
rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
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# File 'lib/redis_client/cluster/router.rb', line 33 def send_command(method, command, *args, &block) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity cmd = ::RedisClient::Cluster::NormalizedCmdName.instance.get_by_command(command) case cmd when 'ping' then @node.send_ping(method, command, args).first.then(&TSF.call(block)) when 'wait' then send_wait_command(method, command, args, &block) when 'keys' then @node.call_replicas(method, command, args).flatten.sort_by(&:to_s).then(&TSF.call(block)) when 'dbsize' then @node.call_replicas(method, command, args).select { |e| e.is_a?(Integer) }.sum.then(&TSF.call(block)) when 'scan' then scan(command, seed: 1) when 'lastsave' then @node.call_all(method, command, args).sort_by(&:to_i).then(&TSF.call(block)) when 'role' then @node.call_all(method, command, args, &block) when 'config' then send_config_command(method, command, args, &block) when 'client' then send_client_command(method, command, args, &block) when 'cluster' then send_cluster_command(method, command, args, &block) when 'memory' then send_memory_command(method, command, args, &block) when 'script' then send_script_command(method, command, args, &block) when 'pubsub' then send_pubsub_command(method, command, args, &block) when 'watch' then send_watch_command(command, &block) when 'acl', 'auth', 'bgrewriteaof', 'bgsave', 'quit', 'save' @node.call_all(method, command, args).first.then(&TSF.call(block)) when 'flushall', 'flushdb' @node.call_primaries(method, command, args).first.then(&TSF.call(block)) when 'readonly', 'readwrite', 'shutdown' raise ::RedisClient::Cluster::OrchestrationCommandNotSupported, cmd when 'discard', 'exec', 'multi', 'unwatch' raise ::RedisClient::Cluster::AmbiguousNodeError, cmd else node = assign_node(command) try_send(node, method, command, args, &block) end rescue ::RedisClient::CircuitBreaker::OpenCircuitError raise rescue ::RedisClient::Cluster::Node::ReloadNeeded update_cluster_info! raise ::RedisClient::Cluster::NodeMightBeDown rescue ::RedisClient::Cluster::ErrorCollection => e raise if e.errors.any?(::RedisClient::CircuitBreaker::OpenCircuitError) update_cluster_info! if e.errors.values.any? do |err| @node.owns_error?(err) && err..start_with?('CLUSTERDOWN Hash slot not served') end raise end |
#try_delegate(node, method, *args, retry_count: 3, **kwargs, &block) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 89 def try_delegate(node, method, *args, retry_count: 3, **kwargs, &block) handle_redirection(node, retry_count: retry_count) do |on_node| on_node.public_send(method, *args, **kwargs, &block) end end |
#try_send(node, method, command, args, retry_count: 3, &block) ⇒ Object
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# File 'lib/redis_client/cluster/router.rb', line 78 def try_send(node, method, command, args, retry_count: 3, &block) handle_redirection(node, retry_count: retry_count) do |on_node| if args.empty? # prevent memory allocation for variable-length args on_node.public_send(method, command, &block) else on_node.public_send(method, *args, command, &block) end end end |