coord

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 Go to latest Published: Sep 28, 2023 License: MIT Imports: 24 Imported by: 0

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Constants

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const (
	// IncludeQueryID is the id for connectivity checks performed by the include state machine.
	// This identifier is used for routing network responses to the state machine.
	IncludeQueryID = coordt.QueryID("include")

	// ProbeQueryID is the id for connectivity checks performed by the probe state machine
	// This identifier is used for routing network responses to the state machine.
	ProbeQueryID = coordt.QueryID("probe")
)

Variables

This section is empty.

Functions

This section is empty.

Types

type Behaviour 

type Behaviour[I BehaviourEvent, O BehaviourEvent] interface {
	// Ready returns a channel that signals when the behaviour is ready to perform work.
	Ready() <-chan struct{}

	// Notify informs the behaviour of an event. The behaviour may perform the event
	// immediately and queue the result, causing the behaviour to become ready.
	// It is safe to call Notify from the Perform method.
	Notify(ctx context.Context, ev I)

	// Perform gives the behaviour the opportunity to perform work or to return a queued
	// result as an event.
	Perform(ctx context.Context) (O, bool)
}

type BehaviourEvent 

type BehaviourEvent interface {
	// contains filtered or unexported methods
}

type BrdcstCommand 

type BrdcstCommand interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

BrdcstCommand is a type of BehaviourEvent that instructs a [BrdcstBehaviour] to perform an action.

type BufferedRoutingNotifier 

type BufferedRoutingNotifier struct {
	// contains filtered or unexported fields
}

A BufferedRoutingNotifier is a RoutingNotifier that buffers RoutingNotification events and provides methods to expect occurrences of specific events. It is designed for use in a test environment.

func NewBufferedRoutingNotifier 

func NewBufferedRoutingNotifier() *BufferedRoutingNotifier

func (*BufferedRoutingNotifier) Expect 

func (w *BufferedRoutingNotifier) Expect(ctx context.Context, expected RoutingNotification) (RoutingNotification, error)

func (*BufferedRoutingNotifier) ExpectRoutingRemoved 

func (w *BufferedRoutingNotifier) ExpectRoutingRemoved(ctx context.Context, id kadt.PeerID) (*EventRoutingRemoved, error)

ExpectRoutingRemoved blocks until an EventRoutingRemoved event is seen for the specified peer id

func (*BufferedRoutingNotifier) ExpectRoutingUpdated 

func (w *BufferedRoutingNotifier) ExpectRoutingUpdated(ctx context.Context, id kadt.PeerID) (*EventRoutingUpdated, error)

ExpectRoutingUpdated blocks until an EventRoutingUpdated event is seen for the specified peer id

func (*BufferedRoutingNotifier) Notify 

func (w *BufferedRoutingNotifier) Notify(ctx context.Context, ev RoutingNotification)

type Coordinator 

type Coordinator struct {
	// contains filtered or unexported fields
}

A Coordinator coordinates the state machines that comprise a Kademlia DHT

func NewCoordinator 

func NewCoordinator(self kadt.PeerID, rtr coordt.Router[kadt.Key, kadt.PeerID, *pb.Message], rt routing.RoutingTableCpl[kadt.Key, kadt.PeerID], cfg *CoordinatorConfig) (*Coordinator, error)

func (*Coordinator) AddNodes 

func (c *Coordinator) AddNodes(ctx context.Context, ids []kadt.PeerID) error

AddNodes suggests new DHT nodes to be added to the routing table. If the routing table is updated as a result of this operation an EventRoutingUpdated notification is emitted on the routing notification channel.

func (*Coordinator) Bootstrap 

func (c *Coordinator) Bootstrap(ctx context.Context, seeds []kadt.PeerID) error

Bootstrap instructs the dht to begin bootstrapping the routing table.

func (*Coordinator) BroadcastRecord 

func (c *Coordinator) BroadcastRecord(ctx context.Context, msg *pb.Message) error

func (*Coordinator) BroadcastStatic 

func (c *Coordinator) BroadcastStatic(ctx context.Context, msg *pb.Message, seeds []kadt.PeerID) error

func (*Coordinator) Close 

func (c *Coordinator) Close() error

Close cleans up all resources associated with this Coordinator.

func (*Coordinator) GetClosestNodes 

func (c *Coordinator) GetClosestNodes(ctx context.Context, k kadt.Key, n int) ([]coordt.Node, error)

GetClosestNodes requests the n closest nodes to the key from the node's local routing table.

func (*Coordinator) GetNode 

func (c *Coordinator) GetNode(ctx context.Context, id kadt.PeerID) (coordt.Node, error)

GetNode retrieves the node associated with the given node id from the DHT's local routing table. If the node isn't found in the table, it returns ErrNodeNotFound.

func (*Coordinator) GetValue 

func (c *Coordinator) GetValue(ctx context.Context, k kadt.Key) (coordt.Value, error)

GetValue requests that the node return any value associated with the supplied key. If the node does not have a value for the key it returns ErrValueNotFound.

func (*Coordinator) ID 

func (c *Coordinator) ID() kadt.PeerID

func (*Coordinator) NotifyConnectivity 

func (c *Coordinator) NotifyConnectivity(ctx context.Context, id kadt.PeerID)

NotifyConnectivity notifies the coordinator that a peer has passed a connectivity check which means it is connected and supports finding closer nodes

func (*Coordinator) NotifyNonConnectivity 

func (c *Coordinator) NotifyNonConnectivity(ctx context.Context, id kadt.PeerID)

NotifyNonConnectivity notifies the coordinator that a peer has failed a connectivity check which means it is not connected and/or it doesn't support finding closer nodes

func (*Coordinator) PutValue 

func (c *Coordinator) PutValue(ctx context.Context, r coordt.Value, q int) error

PutValue requests that the node stores a value to be associated with the supplied key. If the node cannot or chooses not to store the value for the key it returns ErrValueNotAccepted.

func (*Coordinator) QueryClosest 

func (c *Coordinator) QueryClosest(ctx context.Context, target kadt.Key, fn coordt.QueryFunc, numResults int) ([]kadt.PeerID, coordt.QueryStats, error)

QueryClosest starts a query that attempts to find the closest nodes to the target key. It returns the closest nodes found to the target key and statistics on the actions of the query.

The supplied [QueryFunc] is called after each successful request to a node with the ID of the node, the response received from the find nodes request made to the node and the current query stats. The query terminates when [QueryFunc] returns an error or when the query has visited the configured minimum number of closest nodes (default 20)

numResults specifies the minimum number of nodes to successfully contact before considering iteration complete. The query is considered to be exhausted when it has received responses from at least this number of nodes and there are no closer nodes remaining to be contacted. A default of 20 is used if this value is less than 1.

func (*Coordinator) QueryMessage 

func (c *Coordinator) QueryMessage(ctx context.Context, msg *pb.Message, fn coordt.QueryFunc, numResults int) ([]kadt.PeerID, coordt.QueryStats, error)

QueryMessage starts a query that iterates over the closest nodes to the target key in the supplied message. The message is sent to each node that is visited.

The supplied [QueryFunc] is called after each successful request to a node with the ID of the node, the response received from the find nodes request made to the node and the current query stats. The query terminates when [QueryFunc] returns an error or when the query has visited the configured minimum number of closest nodes (default 20)

numResults specifies the minimum number of nodes to successfully contact before considering iteration complete. The query is considered to be exhausted when it has received responses from at least this number of nodes and there are no closer nodes remaining to be contacted. A default of 20 is used if this value is less than 1.

func (*Coordinator) SetRoutingNotifier 

func (c *Coordinator) SetRoutingNotifier(rn RoutingNotifier)

type CoordinatorConfig 

type CoordinatorConfig struct {
	// Clock is a clock that may replaced by a mock when testing
	Clock clock.Clock

	// Logger is a structured logger that will be used when logging.
	Logger *slog.Logger

	// MeterProvider is the the meter provider to use when initialising metric instruments.
	MeterProvider metric.MeterProvider

	// TracerProvider is the tracer provider to use when initialising tracing
	TracerProvider trace.TracerProvider

	// Routing is the configuration used for the [RoutingBehaviour] which maintains the health of the routing table.
	Routing RoutingConfig

	// Query is the configuration used for the [PooledQueryBehaviour] which manages the execution of user queries.
	Query PooledQueryConfig
}

func DefaultCoordinatorConfig 

func DefaultCoordinatorConfig() *CoordinatorConfig

func (*CoordinatorConfig) Validate 

func (cfg *CoordinatorConfig) Validate() error

Validate checks the configuration options and returns an error if any have invalid values.

type EventAddNode 

type EventAddNode struct {
	NodeID kadt.PeerID
}

EventAddNode notifies the routing behaviour of a potential new peer.

type EventBootstrapFinished 

type EventBootstrapFinished struct {
	Stats query.QueryStats
}

EventBootstrapFinished is emitted by the coordinator when a bootstrap has finished, either through running to completion or by being canceled.

type EventBroadcastFinished 

type EventBroadcastFinished struct {
	QueryID   coordt.QueryID
	Contacted []kadt.PeerID
	Errors    map[string]struct {
		Node kadt.PeerID
		Err  error
	}
}

EventBroadcastFinished is emitted by the coordinator when a broadcasting a record to the network has finished, either through running to completion or by being canceled.

type EventGetCloserNodesFailure 

type EventGetCloserNodesFailure struct {
	QueryID coordt.QueryID
	To      kadt.PeerID // To is the peer that the GetCloserNodes request was sent to.
	Target  kadt.Key
	Err     error
}

EventGetCloserNodesFailure notifies a behaviour that a GetCloserNodes request, initiated by an EventOutboundGetCloserNodes event has failed to produce a valid response.

type EventGetCloserNodesSuccess 

type EventGetCloserNodesSuccess struct {
	QueryID     coordt.QueryID
	To          kadt.PeerID // To is the peer that the GetCloserNodes request was sent to.
	Target      kadt.Key
	CloserNodes []kadt.PeerID
}

EventGetCloserNodesSuccess notifies a behaviour that a GetCloserNodes request, initiated by an EventOutboundGetCloserNodes event has produced a successful response.

type EventNotifyConnectivity 

type EventNotifyConnectivity struct {
	NodeID kadt.PeerID
}

EventNotifyConnectivity notifies a behaviour that a peer's connectivity and support for finding closer nodes has been confirmed such as from a successful query response or an inbound query. This should not be used for general connections to the host but only when it is confirmed that the peer responds to requests for closer nodes.

type EventNotifyNonConnectivity 

type EventNotifyNonConnectivity struct {
	NodeID kadt.PeerID
}

EventNotifyNonConnectivity notifies a behaviour that a peer does not have connectivity and/or does not support finding closer nodes is known.

type EventOutboundGetCloserNodes 

type EventOutboundGetCloserNodes struct {
	QueryID coordt.QueryID
	To      kadt.PeerID
	Target  kadt.Key
	Notify  Notify[BehaviourEvent]
}

type EventOutboundSendMessage 

type EventOutboundSendMessage struct {
	QueryID coordt.QueryID
	To      kadt.PeerID
	Message *pb.Message
	Notify  Notify[BehaviourEvent]
}

type EventQueryFinished 

type EventQueryFinished struct {
	QueryID      coordt.QueryID
	Stats        query.QueryStats
	ClosestNodes []kadt.PeerID
}

EventQueryFinished is emitted by the coordinator when a query has finished, either through running to completion or by being canceled.

type EventQueryProgressed 

type EventQueryProgressed struct {
	QueryID  coordt.QueryID
	NodeID   kadt.PeerID
	Response *pb.Message
	Stats    query.QueryStats
}

EventQueryProgressed is emitted by the coordinator when a query has received a response from a node.

type EventRoutingPoll 

type EventRoutingPoll struct{}

EventRoutingPoll notifies a routing behaviour that it may proceed with any pending work.

type EventRoutingRemoved 

type EventRoutingRemoved struct {
	NodeID kadt.PeerID
}

EventRoutingRemoved is emitted by the coordinator when new node has been removed from the routing table.

type EventRoutingUpdated 

type EventRoutingUpdated struct {
	NodeID kadt.PeerID
}

EventRoutingUpdated is emitted by the coordinator when a new node has been verified and added to the routing table.

type EventSendMessageFailure 

type EventSendMessageFailure struct {
	QueryID coordt.QueryID
	Request *pb.Message
	To      kadt.PeerID // To is the peer that the SendMessage request was sent to.
	Target  kadt.Key
	Err     error
}

EventSendMessageFailure notifies a behaviour that a SendMessage request, initiated by an EventOutboundSendMessage event has failed to produce a valid response.

type EventSendMessageSuccess 

type EventSendMessageSuccess struct {
	QueryID     coordt.QueryID
	Request     *pb.Message
	To          kadt.PeerID // To is the peer that the SendMessage request was sent to.
	Response    *pb.Message
	CloserNodes []kadt.PeerID
}

EventSendMessageSuccess notifies a behaviour that a SendMessage request, initiated by an EventOutboundSendMessage event has produced a successful response.

type EventStartBootstrap 

type EventStartBootstrap struct {
	SeedNodes []kadt.PeerID
}

type EventStartBroadcast 

type EventStartBroadcast struct {
	QueryID coordt.QueryID
	Target  kadt.Key
	Message *pb.Message
	Seed    []kadt.PeerID
	Config  brdcst.Config
	Notify  NotifyCloser[BehaviourEvent]
}

EventStartBroadcast starts a new

type EventStartFindCloserQuery 

type EventStartFindCloserQuery struct {
	QueryID           coordt.QueryID
	Target            kadt.Key
	KnownClosestNodes []kadt.PeerID
	Notify            NotifyCloser[BehaviourEvent]
	NumResults        int // the minimum number of nodes to successfully contact before considering iteration complete
}

type EventStartMessageQuery 

type EventStartMessageQuery struct {
	QueryID           coordt.QueryID
	Target            kadt.Key
	Message           *pb.Message
	KnownClosestNodes []kadt.PeerID
	Notify            NotifyCloser[BehaviourEvent]
	NumResults        int // the minimum number of nodes to successfully contact before considering iteration complete
}

type EventStopQuery 

type EventStopQuery struct {
	QueryID coordt.QueryID
}

type NetworkBehaviour 

type NetworkBehaviour struct {
	// contains filtered or unexported fields
}

func NewNetworkBehaviour 

func NewNetworkBehaviour(rtr coordt.Router[kadt.Key, kadt.PeerID, *pb.Message], logger *slog.Logger, tracer trace.Tracer) *NetworkBehaviour

func (*NetworkBehaviour) Notify 

func (b *NetworkBehaviour) Notify(ctx context.Context, ev BehaviourEvent)

func (*NetworkBehaviour) Perform 

func (b *NetworkBehaviour) Perform(ctx context.Context) (BehaviourEvent, bool)

func (*NetworkBehaviour) Ready 

func (b *NetworkBehaviour) Ready() <-chan struct{}

type NetworkCommand 

type NetworkCommand interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

NetworkCommand is a type of BehaviourEvent that instructs a NetworkBehaviour to perform an action.

type NodeHandler 

type NodeHandler struct {
	// contains filtered or unexported fields
}

func NewNodeHandler 

func NewNodeHandler(self kadt.PeerID, rtr coordt.Router[kadt.Key, kadt.PeerID, *pb.Message], logger *slog.Logger, tracer trace.Tracer) *NodeHandler

func (*NodeHandler) GetClosestNodes 

func (h *NodeHandler) GetClosestNodes(ctx context.Context, k kadt.Key, n int) ([]coordt.Node, error)

GetClosestNodes requests the n closest nodes to the key from the node's local routing table. The node may return fewer nodes than requested.

func (*NodeHandler) GetValue 

func (h *NodeHandler) GetValue(ctx context.Context, key kadt.Key) (coordt.Value, error)

GetValue requests that the node return any value associated with the supplied key. If the node does not have a value for the key it returns ErrValueNotFound.

func (*NodeHandler) ID 

func (h *NodeHandler) ID() kadt.PeerID

func (*NodeHandler) Notify 

func (h *NodeHandler) Notify(ctx context.Context, ev NodeHandlerRequest)

func (*NodeHandler) PutValue 

func (h *NodeHandler) PutValue(ctx context.Context, r coordt.Value, q int) error

PutValue requests that the node stores a value to be associated with the supplied key. If the node cannot or chooses not to store the value for the key it returns ErrValueNotAccepted.

type NodeHandlerRequest 

type NodeHandlerRequest interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

type NodeHandlerResponse 

type NodeHandlerResponse interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

type Notify 

type Notify[E BehaviourEvent] interface {
	Notify(ctx context.Context, ev E)
}

Notify is the interface that a components to implement to be notified of BehaviourEvent's.

type NotifyCloser 

type NotifyCloser[E BehaviourEvent] interface {
	Notify[E]
	Close()
}

type NotifyFunc 

type NotifyFunc[E BehaviourEvent] func(ctx context.Context, ev E)

func (NotifyFunc[E]) Notify 

func (f NotifyFunc[E]) Notify(ctx context.Context, ev E)

type PooledBroadcastBehaviour 

type PooledBroadcastBehaviour struct {
	// contains filtered or unexported fields
}

func NewPooledBroadcastBehaviour 

func NewPooledBroadcastBehaviour(brdcstPool *brdcst.Pool[kadt.Key, kadt.PeerID, *pb.Message], logger *slog.Logger, tracer trace.Tracer) *PooledBroadcastBehaviour

func (*PooledBroadcastBehaviour) Notify 

func (b *PooledBroadcastBehaviour) Notify(ctx context.Context, ev BehaviourEvent)

func (*PooledBroadcastBehaviour) Perform 

func (b *PooledBroadcastBehaviour) Perform(ctx context.Context) (BehaviourEvent, bool)

func (*PooledBroadcastBehaviour) Ready 

func (b *PooledBroadcastBehaviour) Ready() <-chan struct{}

type PooledQueryBehaviour 

type PooledQueryBehaviour struct {
	// contains filtered or unexported fields
}

func NewPooledQueryBehaviour 

func NewPooledQueryBehaviour(self kadt.PeerID, cfg *PooledQueryConfig) (*PooledQueryBehaviour, error)

func (*PooledQueryBehaviour) Notify 

func (p *PooledQueryBehaviour) Notify(ctx context.Context, ev BehaviourEvent)

func (*PooledQueryBehaviour) Perform 

func (p *PooledQueryBehaviour) Perform(ctx context.Context) (BehaviourEvent, bool)

func (*PooledQueryBehaviour) Ready 

func (p *PooledQueryBehaviour) Ready() <-chan struct{}

type PooledQueryConfig 

type PooledQueryConfig struct {
	// Clock is a clock that may replaced by a mock when testing
	Clock clock.Clock

	// Logger is a structured logger that will be used when logging.
	Logger *slog.Logger

	// Tracer is the tracer that should be used to trace execution.
	Tracer trace.Tracer

	// Concurrency is the maximum number of queries that may be waiting for message responses at any one time.
	Concurrency int

	// Timeout the time to wait before terminating a query that is not making progress.
	Timeout time.Duration

	// RequestConcurrency is the maximum number of concurrent requests that each query may have in flight.
	RequestConcurrency int

	// RequestTimeout is the timeout queries should use for contacting a single node
	RequestTimeout time.Duration
}

func DefaultPooledQueryConfig 

func DefaultPooledQueryConfig() *PooledQueryConfig

func (*PooledQueryConfig) Validate 

func (cfg *PooledQueryConfig) Validate() error

Validate checks the configuration options and returns an error if any have invalid values.

type QueryCommand 

type QueryCommand interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

QueryCommand is a type of BehaviourEvent that instructs a [QueryBehaviour] to perform an action.

type RoutingBehaviour 

type RoutingBehaviour struct {
	// contains filtered or unexported fields
}

A RoutingBehaviour provides the behaviours for bootstrapping and maintaining a DHT's routing table.

func ComposeRoutingBehaviour 

func ComposeRoutingBehaviour(
	self kadt.PeerID,
	bootstrap coordt.StateMachine[routing.BootstrapEvent, routing.BootstrapState],
	include coordt.StateMachine[routing.IncludeEvent, routing.IncludeState],
	probe coordt.StateMachine[routing.ProbeEvent, routing.ProbeState],
	explore coordt.StateMachine[routing.ExploreEvent, routing.ExploreState],
	cfg *RoutingConfig,
) (*RoutingBehaviour, error)

ComposeRoutingBehaviour creates a RoutingBehaviour composed of the supplied state machines. The state machines are assumed to pre-configured so any RoutingConfig values relating to the state machines will not be applied.

func NewRoutingBehaviour 

func NewRoutingBehaviour(self kadt.PeerID, rt routing.RoutingTableCpl[kadt.Key, kadt.PeerID], cfg *RoutingConfig) (*RoutingBehaviour, error)

func (*RoutingBehaviour) Notify 

func (r *RoutingBehaviour) Notify(ctx context.Context, ev BehaviourEvent)

func (*RoutingBehaviour) Perform 

func (r *RoutingBehaviour) Perform(ctx context.Context) (BehaviourEvent, bool)

func (*RoutingBehaviour) Ready 

func (r *RoutingBehaviour) Ready() <-chan struct{}

type RoutingCommand 

type RoutingCommand interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

RoutingCommand is a type of BehaviourEvent that instructs a RoutingBehaviour to perform an action.

type RoutingConfig 

type RoutingConfig struct {
	// Clock is a clock that may replaced by a mock when testing
	Clock clock.Clock

	// Logger is a structured logger that will be used when logging.
	Logger *slog.Logger

	// Tracer is the tracer that should be used to trace execution.
	Tracer trace.Tracer

	// Meter is the meter that should be used to record metrics.
	Meter metric.Meter

	// BootstrapTimeout is the time the behaviour should wait before terminating a bootstrap if it is not making progress.
	BootstrapTimeout time.Duration

	// BootstrapRequestConcurrency is the maximum number of concurrent requests that the behaviour may have in flight during bootstrap.
	BootstrapRequestConcurrency int

	// BootstrapRequestTimeout is the timeout the behaviour should use when attempting to contact a node during bootstrap.
	BootstrapRequestTimeout time.Duration

	// ConnectivityCheckTimeout is the timeout the behaviour should use when performing a connectivity check.
	ConnectivityCheckTimeout time.Duration

	// ProbeRequestConcurrency is the maximum number of concurrent requests that the behaviour may have in flight while performing
	// connectivity checks for nodes in the routing table.
	ProbeRequestConcurrency int

	// ProbeCheckInterval is the time interval the behaviour should use between connectivity checks for the same node in the routing table.
	ProbeCheckInterval time.Duration

	// IncludeQueueCapacity is the maximum number of nodes the behaviour should keep queued as candidates for inclusion in the routing table.
	IncludeQueueCapacity int

	// IncludeRequestConcurrency is the maximum number of concurrent requests that the behaviour may have in flight while performing
	// connectivity checks for nodes in the inclusion candidate queue.
	IncludeRequestConcurrency int

	// ExploreTimeout is the time the behaviour should wait before terminating an exploration of a routing table bucket if it is not making progress.
	ExploreTimeout time.Duration

	// ExploreRequestConcurrency is the maximum number of concurrent requests that the behaviour may have in flight while exploring the
	// network to increase routing table occupancy.
	ExploreRequestConcurrency int

	// ExploreRequestTimeout is the timeout the behaviour should use when attempting to contact a node while exploring the
	// network to increase routing table occupancy.
	ExploreRequestTimeout time.Duration

	// ExploreMaximumCpl is the maximum CPL (common prefix length) the behaviour should explore to increase routing table occupancy.
	// All CPLs from this value to zero will be explored on a repeating schedule.
	ExploreMaximumCpl int

	// ExploreInterval is the base time interval the behaviour should leave between explorations of the same CPL.
	// See the documentation for [routing.DynamicExploreSchedule] for the precise formula used to calculate explore intervals.
	ExploreInterval time.Duration

	// ExploreIntervalMultiplier is a factor that is applied to the base time interval for CPLs lower than the maximum to increase the delay between
	// explorations for lower CPLs.
	// See the documentation for [routing.DynamicExploreSchedule] for the precise formula used to calculate explore intervals.
	ExploreIntervalMultiplier float64

	// ExploreIntervalJitter is a factor that is used to increase the calculated interval for an exploratiion by a small random amount.
	// It must be between 0 and 0.05. When zero, no jitter is applied.
	// See the documentation for [routing.DynamicExploreSchedule] for the precise formula used to calculate explore intervals.
	ExploreIntervalJitter float64
}

func DefaultRoutingConfig 

func DefaultRoutingConfig() *RoutingConfig

func (*RoutingConfig) Validate 

func (cfg *RoutingConfig) Validate() error

Validate checks the configuration options and returns an error if any have invalid values.

type RoutingNotification 

type RoutingNotification interface {
	BehaviourEvent
	// contains filtered or unexported methods
}

type RoutingNotifier 

type RoutingNotifier interface {
	Notify(context.Context, RoutingNotification)
}

type Telemetry 

type Telemetry struct {
	Tracer trace.Tracer
}

Telemetry is the struct that holds a reference to all metrics and the tracer used by the coordinator and its components. Make sure to also register the [MeterProviderOpts] with your custom or the global metric.MeterProvider.

func NewTelemetry 

func NewTelemetry(meterProvider metric.MeterProvider, tracerProvider trace.TracerProvider) (*Telemetry, error)

NewTelemetry initializes a Telemetry struct with the given meter and tracer providers.

type Waiter 

type Waiter[E BehaviourEvent] struct {
	// contains filtered or unexported fields
}

A Waiter is a Notifiee whose Notify method forwards the notified event to a channel which a client can wait on.

func NewWaiter 

func NewWaiter[E BehaviourEvent]() *Waiter[E]

func (*Waiter[E]) Chan 

func (w *Waiter[E]) Chan() <-chan WaiterEvent[E]

func (*Waiter[E]) Close 

func (w *Waiter[E]) Close()

Close signals that the waiter should not forward and further calls to Notify. It closes the waiter channel so a client selecting on it will receive the close operation.

func (*Waiter[E]) Notify 

func (w *Waiter[E]) Notify(ctx context.Context, ev E)

type WaiterEvent 

type WaiterEvent[E BehaviourEvent] struct {
	Ctx   context.Context
	Event E
}

type WorkQueue 

type WorkQueue[E BehaviourEvent] struct {
	// contains filtered or unexported fields
}

WorkQueue is buffered queue of work to be performed. The queue automatically drains the queue sequentially by calling a WorkQueueFunc for each work item, passing the original context and event.

func NewWorkQueue 

func NewWorkQueue[E BehaviourEvent](fn WorkQueueFunc[E]) *WorkQueue[E]

func (*WorkQueue[E]) Enqueue 

func (w *WorkQueue[E]) Enqueue(ctx context.Context, cmd E) error

Enqueue queues work to be perfomed. It will block if the queue has reached its maximum capacity for pending work. While blocking it will return a context cancellation error if the work item's context is cancelled.

type WorkQueueFunc 

type WorkQueueFunc[E BehaviourEvent] func(context.Context, E) bool

Source Files

View all Source files

Directories

Path Synopsis
Package brdcst contains state machines that implement algorithms for broadcasting records into the DHT network.
 Package brdcst contains state machines that implement algorithms for broadcasting records into the DHT network.
internal
nettest
tiny
Package tiny implements Kademlia types suitable for tiny test networks
 Package tiny implements Kademlia types suitable for tiny test networks

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