component

package
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 Go to latest Published: Apr 15, 2021 License: Apache-2.0 Imports: 41 Imported by: 0

Documentation

Overview

Package component contains the methods and structures common to all components.

Index

Constants

View Source 
const (
	DefaultTaskBackoffResetDuration = time.Minute
	DefaultTaskBackoffJitter        = 0.1
)

Variables

View Source 
var (
	// DefaultTaskBackoffIntervals are the default task backoff intervals.
	DefaultTaskBackoffIntervals = [...]time.Duration{
		10 * time.Millisecond,
		50 * time.Millisecond,
		100 * time.Millisecond,
		time.Second,
	}
	// DefaultTaskBackoffIntervalFunc is the default TaskBackoffIntervalFunc.
	DefaultTaskBackoffIntervalFunc = MakeTaskBackoffIntervalFunc(false, DefaultTaskBackoffResetDuration, DefaultTaskBackoffIntervals[:]...)
	// DefaultTaskBackoffConfig is the default task backoff config.
	DefaultTaskBackoffConfig = &TaskBackoffConfig{
		Jitter:       DefaultTaskBackoffJitter,
		IntervalFunc: DefaultTaskBackoffIntervalFunc,
	}

	// DialTaskBackoffIntervals are the default task backoff intervals for tasks using Dial.
	DialTaskBackoffIntervals = [...]time.Duration{
		100 * time.Millisecond,
		time.Second,
		10 * time.Second,
	}
	// DialTaskBackoffIntervalFunc is the default TaskBackoffIntervalFunc for tasks using Dial.
	DialTaskBackoffIntervalFunc = MakeTaskBackoffIntervalFunc(false, DefaultTaskBackoffResetDuration, DialTaskBackoffIntervals[:]...)
	// DialTaskBackoffConfig is the default task backoff config for tasks using Dial.
	DialTaskBackoffConfig = &TaskBackoffConfig{
		Jitter:       DefaultTaskBackoffJitter,
		IntervalFunc: DialTaskBackoffIntervalFunc,
	}
)

Functions

func DefaultStartTask added in v3.9.1 

func DefaultStartTask(conf *TaskConfig)

Types

type Component 

type Component struct {
	FrequencyPlans *frequencyplans.Store
	KeyVault       crypto.KeyVault
	// contains filtered or unexported fields
}

Component is a base component for The Things Network cluster

func MustNew 

func MustNew(logger log.Stack, config *Config, opts ...Option) *Component

MustNew calls New and returns a new component or panics on an error. In most cases, you should just use New.

func New 

func New(logger log.Stack, config *Config, opts ...Option) (c *Component, err error)

New returns a new component.

func (*Component) AddContextFiller 

func (c *Component) AddContextFiller(f fillcontext.Filler)

AddContextFiller adds the specified filler.

func (*Component) AllowInsecureForCredentials 

func (c *Component) AllowInsecureForCredentials() bool

AllowInsecureForCredentials returns `true` if the component was configured to allow transmission of credentials over insecure transports.

func (*Component) ClaimIDs 

func (c *Component) ClaimIDs(ctx context.Context, ids ttnpb.Identifiers) error

ClaimIDs claims the identifiers in the cluster. See package ../cluster for more information.

func (*Component) Close 

func (c *Component) Close()

Close closes the server.

func (*Component) ClusterAuthStreamHook 

func (c *Component) ClusterAuthStreamHook() hooks.StreamHandlerMiddleware

ClusterAuthStreamHook ensuring the caller of an RPC is part of the cluster. If a call can't be identified as coming from the cluster, it will be discarded.

func (*Component) ClusterAuthUnaryHook 

func (c *Component) ClusterAuthUnaryHook() hooks.UnaryHandlerMiddleware

ClusterAuthUnaryHook ensuring the caller of an RPC is part of the cluster. If a call can't be identified as coming from the cluster, it will be discarded.

func (*Component) ClusterTLS 

func (c *Component) ClusterTLS() bool

ClusterTLS returns whether the cluster uses TLS for cluster connections.

func (*Component) Context 

func (c *Component) Context() context.Context

Context returns the context of the component.

func (*Component) FillContext 

func (c *Component) FillContext(ctx context.Context) context.Context

FillContext fills the context. This method should only be used for request contexts.

func (*Component) FromRequestContext added in v3.10.1 

func (c *Component) FromRequestContext(ctx context.Context) context.Context

FromRequestContext returns a derived context from the component context with key values from the request context. This can be used to decouple the lifetime from the request context while keeping security information.

func (*Component) GetBaseConfig 

func (c *Component) GetBaseConfig(ctx context.Context) config.ServiceBase

GetBaseConfig gets the base config of the component.

func (*Component) GetPeer 

func (c *Component) GetPeer(ctx context.Context, role ttnpb.ClusterRole, ids ttnpb.Identifiers) (cluster.Peer, error)

GetPeer returns a cluster peer with the given role and the given tags. See package ../cluster for more information.

func (*Component) GetPeerConn 

func (c *Component) GetPeerConn(ctx context.Context, role ttnpb.ClusterRole, ids ttnpb.Identifiers) (*grpc.ClientConn, error)

GetPeerConn returns a gRPC client connection to the cluster peer. See package ../cluster for more information.

func (*Component) GetPeers 

func (c *Component) GetPeers(ctx context.Context, role ttnpb.ClusterRole) ([]cluster.Peer, error)

GetPeers returns cluster peers with the given role and the given tags. See package ../cluster for more information.

func (*Component) GetTLSClientConfig 

func (c *Component) GetTLSClientConfig(ctx context.Context, opts ...TLSConfigOption) (*tls.Config, error)

GetTLSClientConfig gets the component's client TLS config and applies the given options.

func (*Component) GetTLSServerConfig 

func (c *Component) GetTLSServerConfig(ctx context.Context, opts ...TLSConfigOption) (*tls.Config, error)

GetTLSServerConfig gets the component's server TLS config and applies the given options.

func (*Component) ListenTCP 

func (c *Component) ListenTCP(address string) (Listener, error)

ListenTCP listens on a TCP address and allows for TCP and TLS on the same port.

func (*Component) ListenUDP 

func (c *Component) ListenUDP(address string) (*net.UDPConn, error)

ListenUDP starts a listener on a UDP address.

func (*Component) LogDebug 

func (c *Component) LogDebug() bool

LogDebug returns whether the component should log debug messages.

func (*Component) Logger 

func (c *Component) Logger() log.Stack

Logger returns the logger of the component.

func (*Component) LoopbackConn 

func (c *Component) LoopbackConn() *grpc.ClientConn

LoopbackConn returns the loopback gRPC connection to the component. This conn must *not* be closed.

func (*Component) RegisterGRPC 

func (c *Component) RegisterGRPC(s rpcserver.Registerer)

RegisterGRPC registers a gRPC subsystem to the component.

func (*Component) RegisterInterop 

func (c *Component) RegisterInterop(s interop.Registerer)

RegisterInterop registers an interop subsystem to the component.

func (*Component) RegisterLivenessCheck 

func (c *Component) RegisterLivenessCheck(name string, check healthcheck.Check)

RegisterLivenessCheck registers a liveness check for the component.

func (*Component) RegisterReadinessCheck 

func (c *Component) RegisterReadinessCheck(name string, check healthcheck.Check)

RegisterReadinessCheck registers a readiness check for the component.

func (*Component) RegisterTask 

func (c *Component) RegisterTask(conf *TaskConfig)

RegisterTask registers a task, optionally with restart policy and backoff, to be started after the component started.

func (*Component) RegisterWeb 

func (c *Component) RegisterWeb(s web.Registerer)

RegisterWeb registers a web subsystem to the component.

func (*Component) Run 

func (c *Component) Run() error

Run starts the component, and returns when a stop signal has been received by the process.

func (*Component) ServeHTTP 

func (c *Component) ServeHTTP(w http.ResponseWriter, r *http.Request)

ServeHTTP serves an HTTP request. If the Content-Type is application/grpc, the request is routed to gRPC. Otherwise, the request is routed to the default web server.

func (*Component) Start 

func (c *Component) Start() (err error)

Start starts the component.

func (*Component) StartTask 

func (c *Component) StartTask(conf *TaskConfig)

func (*Component) UnclaimIDs 

func (c *Component) UnclaimIDs(ctx context.Context, ids ttnpb.Identifiers) error

UnclaimIDs unclaims the identifiers in the cluster. See package ../cluster for more information.

func (*Component) WithClusterAuth 

func (c *Component) WithClusterAuth() grpc.CallOption

WithClusterAuth that can be used to identify a component within a cluster.

type Config 

type Config struct {
	config.ServiceBase `name:",squash" yaml:",inline"`
}

Config is the type of configuration for Components

type ConfigurationServer 

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

ConfigurationServer implements the Configuration RPC service.

func NewConfigurationServer 

func NewConfigurationServer(c *Component) *ConfigurationServer

NewConfigurationServer returns a new ConfigurationServer on top of the given component.

func (*ConfigurationServer) ListFrequencyPlans 

func (c *ConfigurationServer) ListFrequencyPlans(ctx context.Context, req *ttnpb.ListFrequencyPlansRequest) (*ttnpb.ListFrequencyPlansResponse, error)

ListFrequencyPlans implements the Configuration service's ListFrequencyPlans RPC.

func (*ConfigurationServer) RegisterHandlers 

func (c *ConfigurationServer) RegisterHandlers(s *runtime.ServeMux, conn *grpc.ClientConn)

RegisterHandlers registers the Configuration service handler.

func (*ConfigurationServer) RegisterServices 

func (c *ConfigurationServer) RegisterServices(s *grpc.Server)

RegisterServices registers the Configuration service.

func (*ConfigurationServer) Roles 

func (c *ConfigurationServer) Roles() []ttnpb.ClusterRole

Roles implements the rpcserver.Registerer interface. It just returns nil.

type Endpoint 

type Endpoint interface {
	Address() string
	Protocol() string
	Listen(Listener) (net.Listener, error)
}

Endpoint represents an endpoint that can be listened on.

func NewTCPEndpoint 

func NewTCPEndpoint(address, protocol string) Endpoint

NewTCPEndpoint returns a new TCP endpoint.

func NewTLSEndpoint 

func NewTLSEndpoint(address, protocol string, configOpts ...TLSConfigOption) Endpoint

NewTLSEndpoint returns a new TLS endpoint.

type Listener 

type Listener interface {
	TLS(opts ...TLSConfigOption) (net.Listener, error)
	TCP() (net.Listener, error)
	Addr() net.Addr
	Close() error
}

Listener that accepts multiple protocols on the same port

type Option 

type Option func(*Component)

Option allows extending the component when it is instantiated with New.

func WithBaseConfigGetter 

func WithBaseConfigGetter(f func(ctx context.Context) config.ServiceBase) Option

WithBaseConfigGetter returns an option that overrides the component's function for getting the base config. This allows overriding the configuration with information in the context.

func WithClusterNew 

func WithClusterNew(f func(ctx context.Context, config *cluster.Config, options ...cluster.Option) (cluster.Cluster, error)) Option

WithClusterNew returns an option that overrides the component's function for setting up the cluster. This allows extending the cluster configuration with custom logic based on information in the context.

func WithTaskStarter added in v3.9.1 

func WithTaskStarter(s TaskStarter) Option

WithTaskStarter returns an option that overrides the component's TaskStarter for starting tasks.

type StartTaskFunc added in v3.9.1 

type StartTaskFunc func(*TaskConfig)

func (StartTaskFunc) StartTask added in v3.9.1 

func (f StartTaskFunc) StartTask(conf *TaskConfig)

type TLSConfigOption 

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

TLSConfigOption provides customization for TLS configuration.

func WithNextProtos 

func WithNextProtos(protos ...string) TLSConfigOption

WithNextProtos appends the given protocols to NextProtos.

func WithTLSCertificates 

func WithTLSCertificates(certificates ...tls.Certificate) TLSConfigOption

WithTLSCertificates sets TLS certificates.

func WithTLSClientAuth 

func WithTLSClientAuth(auth tls.ClientAuthType, cas *x509.CertPool, verify func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error) TLSConfigOption

WithTLSClientAuth sets TLS client authentication options.

type TLSConfigOptionFunc 

type TLSConfigOptionFunc func(*tls.Config)

TLSConfigOptionFunc is a TLSConfigOption.

type TaskBackoffConfig added in v3.9.1 

type TaskBackoffConfig struct {
	Jitter       float64
	IntervalFunc TaskBackoffIntervalFunc
}

TaskBackoffConfig represents task backoff configuration.

type TaskBackoffIntervalFunc added in v3.9.2 

type TaskBackoffIntervalFunc func(ctx context.Context, executionDuration time.Duration, invocation uint, err error) time.Duration

TaskBackoffIntervalFunc is a function that decides the backoff interval based on the attempt history. invocation is a counter, which starts at 1 and is incremented after each task function invocation.

func MakeTaskBackoffIntervalFunc added in v3.9.2 

func MakeTaskBackoffIntervalFunc(onFailure bool, resetDuration time.Duration, intervals ...time.Duration) TaskBackoffIntervalFunc

MakeTaskBackoffIntervalFunc returns a new TaskBackoffIntervalFunc.

type TaskConfig added in v3.9.1 

type TaskConfig struct {
	Context context.Context
	ID      string
	Func    TaskFunc
	Done    func()
	Restart TaskRestart
	Backoff *TaskBackoffConfig
}

type TaskFunc 

type TaskFunc func(context.Context) error

TaskFunc is the task function.

func (TaskFunc) Execute added in v3.9.4 

func (f TaskFunc) Execute(ctx context.Context) (err error)

type TaskRestart 

type TaskRestart uint8

TaskRestart defines a task's restart policy. 

const (
	// TaskRestartNever denotes a restart policy that never restarts tasks after success or failure.
	TaskRestartNever TaskRestart = iota
	// TaskRestartAlways denotes a restart policy that always restarts tasks, on success and failure.
	TaskRestartAlways
	// TaskRestartOnFailure denotes a restart policy that restarts tasks on failure.
	TaskRestartOnFailure
)

type TaskStarter added in v3.9.1 

type TaskStarter interface {
	// StartTask starts the specified task function, optionally with restart policy and backoff.
	StartTask(*TaskConfig)
}

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