core

package
v0.161.0 Latest Latest
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 Go to latest Published: Jun 2, 2021 License: Apache-2.0 Imports: 35 Imported by: 6

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Constants

This section is empty.

Variables

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var (

	// Name is set at the build time.
	Name = ""

	// Version is set at the build time.
	Version = ""

	// BuildID is set at the build time.
	BuildID = ""

	// CommitSha is set at the build time.
	CommitSha = ""

	// BranchName is set at the build time.
	BranchName = ""

	// TagName is set at the build time.
	TagName = ""
)

Functions

func BuildDownstreamGRPCClient added in v0.56.0 

func BuildDownstreamGRPCClient(serviceName string, hooks *Hooks, cfg *config.CommonGRPCDownstreamData) (*grpc.ClientConn, error)

BuildDownstreamGRPCClient creates a grpc client connection to the target indicated by cfg.ServiceAddress. The dial options can be customised by cfg or by hooks, see ResolveGrpcDialOptions for details. The serviceName is the name of the target service. This function is intended to be called from generated code.

func BuildDownstreamHTTPClient 

func BuildDownstreamHTTPClient(serviceName string, cfg *config.CommonDownstreamData) (*http.Client, error)

func DefaultGrpcServerOptions added in v0.97.0 

func DefaultGrpcServerOptions(ctx context.Context, grpcPublicServerConfig *config.CommonServerConfig) ([]grpc.ServerOption, error)

func GetAppConfigType added in v0.87.0 

func GetAppConfigType(createService interface{}) reflect.Type

GetAppConfigType extracts the app's config type from createService. Precondition: MustTypeCheckCreateService(createService, serviceInterface) succeeded.

func InitialiseLogging added in v0.85.0 

func InitialiseLogging(ctx context.Context, configs []log.Config, logrusLogger *logrus.Logger) context.Context

initialise the logger sysl-go always uses a pkg logger internally. if custom code passes in a logrus logger, a mechanism which is deprecated, then a hook is added to the internal pkg logger that forwards logged events to the provided logrus logger. sysl-go can be requested to log in a verbose manner. logger in a verbose manner logs additional details within log events where appropriate. the mechanism to set this verbose manner is to either have a sufficiently high logrus log level or the verbose mode set against the pkg logger.

func LoadCustomConfig added in v0.87.0 

func LoadCustomConfig(ctx context.Context, customConfig interface{}) (interface{}, error)

LoadCustomConfig populates the given zero customConfig value with configuration data.

func MustTypeCheckCreateService added in v0.87.0 

func MustTypeCheckCreateService(createService, serviceInterface interface{})

MustTypeCheckCreateService checks that the given createService has an acceptable type, and panics otherwise.

func NewZeroCustomConfig added in v0.87.0 

func NewZeroCustomConfig(downstreamConfigType, appConfigType reflect.Type) interface{}

NewZeroCustomConfig uses reflection to create a new type derived from DefaultConfig, but with new GenCode.Downstream and App fields holding the same types as downstreamConfig and appConfig. It returns a pointer to a zero value of that new type.

func Recoverer 

func Recoverer(next http.Handler) http.Handler

func ResolveGRPCAuthorizationRule added in v0.108.0 

func ResolveGRPCAuthorizationRule(ctx context.Context, cfg *config.DefaultConfig, h *Hooks, endpointName string, authRuleExpression string) (authrules.Rule, error)

func ResolveGrpcDialOptions added in v0.98.0 

func ResolveGrpcDialOptions(serviceName string, h *Hooks, grpcDownstreamConfig *config.CommonGRPCDownstreamData) ([]grpc.DialOption, error)

func ResolveGrpcServerOptions added in v0.97.0 

func ResolveGrpcServerOptions(ctx context.Context, h *Hooks, grpcPublicServerConfig *config.CommonServerConfig) ([]grpc.ServerOption, error)

func ResolveRESTAuthorizationRule added in v0.109.0 

func ResolveRESTAuthorizationRule(ctx context.Context, cfg *config.DefaultConfig, h *Hooks, endpointName string, authRuleExpression string) (authrules.Rule, error)

func SelectBasePath 

func SelectBasePath(fromSpec, dynamic string) string

SelectBasePath chooses between a specified base path and a dynmaically chosen one.

func Serve added in v0.84.0 

func Serve(
	ctx context.Context,
	downstreamConfig, createService, serviceInterface interface{},
	newManagers func(ctx context.Context, cfg *config.DefaultConfig, serviceIntf interface{}, hooks *Hooks) (Manager, *GrpcServerManager, error),
) error

Serve is deprecated and will be removed once downstream applications cease depending upon it. Generated code will no longer call this function. This is a shim for compatibility with code generated by sysl-go versions v0.122.0 & earlier.

func TraceidLogInterceptor added in v0.97.0 

func TraceidLogInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error)

func WithConfigFile added in v0.146.0 

func WithConfigFile(ctx context.Context, yamlConfigData []byte) context.Context

WithConfigFile adds configuration data into the context. This will be used as the source of application configuration data, instead of the default behaviour of reading configuration from the config file path specified by command line arguments. Data must be in YAML format.

Types

type ErrDisplayHelp added in v0.154.0 

type ErrDisplayHelp int

func (ErrDisplayHelp) Error added in v0.154.0 

func (e ErrDisplayHelp) Error() string

type GrpcGenCallback added in v0.4.0 

type GrpcGenCallback interface {
	DownstreamTimeoutContext(ctx context.Context) (context.Context, context.CancelFunc)
}

GrpcGenCallback is currently a subset of RestGenCallback so is defined separately for convenience.

type GrpcManager deprecated 

type GrpcManager interface {
	Interceptors() []grpc.UnaryServerInterceptor
	EnabledGrpcHandlers() []handlerinitialiser.GrpcHandlerInitialiser
	GrpcAdminServerConfig() *config.CommonServerConfig
	GrpcPublicServerConfig() *config.CommonServerConfig
}

Deprecated: prefer GrpcServerManager.

type GrpcServerManager added in v0.97.0 

type GrpcServerManager struct {
	GrpcServerOptions      []grpc.ServerOption
	EnabledGrpcHandlers    []handlerinitialiser.GrpcHandlerInitialiser
	GrpcPublicServerConfig *config.CommonServerConfig
}

type HTTPManagerShim added in v0.91.0 

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

func NewHTTPManagerShim added in v0.91.0 

func NewHTTPManagerShim(libraryConfig *config.LibraryConfig, adminServerConfig *config.CommonHTTPServerConfig, publicServerConfig *config.CommonHTTPServerConfig, enabledHandlers []handlerinitialiser.HandlerInitialiser) *HTTPManagerShim

func (*HTTPManagerShim) AdminServerConfig added in v0.91.0 

func (m *HTTPManagerShim) AdminServerConfig() *config.CommonHTTPServerConfig

func (*HTTPManagerShim) EnabledHandlers added in v0.91.0 

func (m *HTTPManagerShim) EnabledHandlers() []handlerinitialiser.HandlerInitialiser

func (*HTTPManagerShim) LibraryConfig added in v0.91.0 

func (m *HTTPManagerShim) LibraryConfig() *config.LibraryConfig

func (*HTTPManagerShim) PublicServerConfig added in v0.91.0 

func (m *HTTPManagerShim) PublicServerConfig() *config.CommonHTTPServerConfig

type Hooks added in v0.97.0 

type Hooks struct {
	// MapError maps an error to an HTTPError in instances where custom error mapping is required.
	// Return nil to perform default error mapping; defined as:
	// 1. CustomError.HTTPError if the original error is a CustomError, otherwise
	// 2. common.MapError
	// By default, if this MapError hook is not customised, the default error mapping will be used.
	MapError func(ctx context.Context, err error) *common.HTTPError

	// AdditionalGrpcDialOptions can be used to append to the default grpc.DialOption configuration used by
	// an autogenerated service when it calls grpc.Dial when using a grpc.Client to connect to a gRPC server.
	// If given, AdditionalGrpcDialOptions will be appended to the list of default options created by
	// DefaultGrpcDialOptions(CommonGRPCDownstreamData).
	//
	// Use AdditionalGrpcDialOptions if you need both default and custom options. Be careful that you do
	// not specify any options that clash with the default options.
	//
	// If you need to completely override the default options, use OverrideGrpcDialOptions.
	// It is an error to set both AdditionalGrpcDialOptions and OverrideGrpcDialOptions.
	AdditionalGrpcDialOptions []grpc.DialOption

	// OverrideGrpcDialOptions can be used to override the default grpc.DialOption configuration used by an
	// an autogenerated service when it calls grpc.Dial when using a grpc.Client to connect to a gRPC server.
	//
	// The serviceName parameter will be filled with the name of the target service that we
	// are about to call grpc.Dial to connect to -- a function implementing this hook can use the
	// serviceName to customise different dial options for different targets.
	//
	// Prefer to use AdditionalGrpcDialOptions instead of OverrideGrpcDialOptions if you only need
	// to append to the default grpc.DialOption configuration instead of overriding it completely.
	//
	// It is an error to set both AdditionalGrpcDialOptions and OverrideGrpcDialOptions.
	OverrideGrpcDialOptions func(serviceName string, cfg *config.CommonGRPCDownstreamData) ([]grpc.DialOption, error)

	// AdditionalGrpcServerOptions can be used to append to the default grpc.ServerOption configuration used by
	// an autogenerated service when it creates a gRPC server. If given, AdditionalGrpcServerOptions will be
	// appended to the list of default options created by DefaultGrpcServerOptions(context.Context, CommonServerConfig).
	//
	// Use AdditionalGrpcServerOptions if you need both default and custom options. Be careful that you do
	// not specify any options that clash with the default options.
	//
	// If you need to completely override the default options, use OverrideGrpcServerOptions.
	// It is an error to set both AdditionalGrpcServerOptions and OverrideGrpcServerOptions.
	AdditionalGrpcServerOptions []grpc.ServerOption

	// OverrideGrpcServerOptions can be used to override the default grpc.ServerOption configuration used by an
	// autogenerated service when it creates a gRPC server.
	//
	// Prefer to use AdditionalGrpcServerOptions instead of OverrideGrpcServerOptions if you only need
	// to append to the default grpc.ServerOption configuration instead of overriding it completely.
	//
	// It is an error to set both AdditionalGrpcServerOptions and OverrideGrpcServerOptions.
	OverrideGrpcServerOptions func(ctx context.Context, grpcPublicServerConfig *config.CommonServerConfig) ([]grpc.ServerOption, error)

	// OverrideMakeJWTClaimsBasedAuthorizationRule can be used to customise how authorization rule
	// expressions are evaluated and used to decide if JWT claims are authorised. By default, if this
	// hook is nil, then authrules.MakeDefaultJWTClaimsBasedAuthorizationRule is used.
	OverrideMakeJWTClaimsBasedAuthorizationRule func(authorizationRuleExpression string) (authrules.JWTClaimsBasedAuthorizationRule, error)

	// AddHTTPMiddleware can be used to install additional HTTP middleware into the chi.Router
	// used to serve all (non-admin) HTTP endpoints. By default, sysl-go installs a number of
	// HTTP middleware -- refer to prepareMiddleware inside sysl-go/core. This hook can only
	// be used to add middleware, not override any of the default middleware.
	AddHTTPMiddleware func(ctx context.Context, r chi.Router)
}

Hooks can be used to customise the behaviour of an autogenerated sysl-go service.

type Manager 

type Manager interface {
	EnabledHandlers() []handlerinitialiser.HandlerInitialiser
	LibraryConfig() *config.LibraryConfig
	AdminServerConfig() *config.CommonHTTPServerConfig
	PublicServerConfig() *config.CommonHTTPServerConfig
}

type MultiError added in v0.123.0 

type MultiError struct {
	Msg    string
	Errors []error
}

FIXME replace MultiError with some existing type that does this job better.

func (MultiError) Error added in v0.123.0 

func (e MultiError) Error() string

type RestGenCallback added in v0.4.0 

type RestGenCallback interface {
	// AddMiddleware allows hand-crafted code to add middleware to the router
	AddMiddleware(ctx context.Context, r chi.Router)
	// BasePath allows hand-crafted code to set the base path for the Router
	BasePath() string
	// Config returns a structure representing the server config
	// This is returned from the status endpoint
	Config() interface{}
	// MapError maps an error to an HTTPError in instances where custom error mapping is required. Return nil to perform default error mapping; defined as:
	// 1. CustomError.HTTPError if the original error is a CustomError, otherwise
	// 2. common.MapError
	MapError(ctx context.Context, err error) *common.HTTPError
	// DownstreamTimeoutContext add the desired timeout duration to the context for downstreams
	// A separate service timeout (usually greater than the downstream) should also be in
	// place to automatically respond to callers
	DownstreamTimeoutContext(ctx context.Context) (context.Context, context.CancelFunc)
}

RestGenCallback is used by `sysl-go` to call hand-crafted code.

type StoppableServer added in v0.123.0 

type StoppableServer interface {
	// Start() directs the server to attempt to start serving. This call will block
	// until a failure occurs, or the server is stopped. If the server is not stopped
	// and no failure occurs, this call may block indefinitely.
	// On a successful stop() or gracefulstop(), no error is returned.
	Start() error

	// Stop() directs the server to immediately and un-gracefully stop, which may
	// interrupt any in-flight requests/calls being processed.
	Stop() error

	// GracefulStop() directs the server to stop accepting new requests/calls and
	// wait for any in-flight requests/calls to complete. Implementations of
	// GracefulStop() should ensure they bring the server to a stop after some
	// bounded period of time, even if this involves ungracefully dropping some
	// laggard requests/calls.
	GracefulStop() error

	GetName() string
}

StoppableServer offers control over the lifecycle of a server that can be started at most once and then stopped.

func NewServer added in v0.123.0 

func NewServer(
	ctx context.Context,
	downstreamConfig, createService, serviceInterface interface{},
	newManagers func(ctx context.Context, cfg *config.DefaultConfig, serviceIntf interface{}, hooks *Hooks) (Manager, *GrpcServerManager, error),
) (StoppableServer, error)

NewServer returns an auto-generated service.

type TLSLogFilter 

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

func (*TLSLogFilter) Write 

func (t *TLSLogFilter) Write(p []byte) (n int, err error)

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