onlineconf

package
v0.0.2 Latest Latest
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 Go to latest Published: Feb 6, 2024 License: MIT Imports: 14 Imported by: 0

Documentation

Index

Constants

View Source 
const ContextOnlineconfName ctxKey = iota
View Source 
const DefaultModule = "TREE"

Variables

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var ErrAddModule = errors.New("add module error")
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var ErrFormatIsNotJSON = errors.New("format is not JSON")
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var ErrUnavailableInRO = errors.New("unable to use in readonly instance")
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var ErrUnavailableModifyRefcountRO = errors.New("can't modify refcount in RO instance")

Functions

func Clone 

func Clone(from, to context.Context) (context.Context, error)

func Create 

func Create(options ...onlineconfInterface.Option) onlineconfInterface.Instance

Initialize sets config directory for onlineconf modules.

func Encode added in v0.0.2 

func Encode(i interface{}) []byte

func GetBool 

func GetBool(ctx context.Context, path string, d ...bool) (bool, error)

GetBool reads an bool value of a named parameter from the module "TREE". It returns this value if the parameter exists and is a bool. In the other case it panics unless default value is provided in the second argument.

func GetBoolIfExists 

func GetBoolIfExists(ctx context.Context, path string) (bool, bool, error)

GetBoolIfExists reads an bool value of a named parameter from the module "TREE". It returns this value and the boolean true if the parameter exists and is a bool. In the other case it returns the boolean false and 0.

func GetInt 

func GetInt(ctx context.Context, path string, d ...int) (int, error)

GetInt reads an integer value of a named parameter from the module "TREE". It returns this value if the parameter exists and is an integer. In the other case it panics unless default value is provided in the second argument.

func GetIntIfExists 

func GetIntIfExists(ctx context.Context, path string) (int, bool, error)

GetIntIfExists reads an integer value of a named parameter from the module "TREE". It returns this value and the boolean true if the parameter exists and is an integer. In the other case it returns the boolean false and 0.

func GetModule 

func GetModule(ctx context.Context, name string) (onlineconfInterface.Module, error)

func GetOrAddModule 

func GetOrAddModule(ctx context.Context, name string) (onlineconfInterface.Module, error)

func GetString 

func GetString(ctx context.Context, path string, d ...string) (string, error)

GetString reads a string value of a named parameter from the module "TREE". It returns this value if the parameter exists and is a string. In the other case it panics unless default value is provided in the second argument.

func GetStringIfExists 

func GetStringIfExists(ctx context.Context, path string) (string, bool, error)

GetStringIfExists reads a string value of a named parameter from the module "TREE". It returns the boolean true if the parameter exists and is a string. In the other case it returns the boolean false and an empty string.

func GetStrings 

func GetStrings(ctx context.Context, path string, defaultValue []string) ([]string, error)

GetStrings reads a []string value of a named parameter from the module "TREE". It returns this value if the parameter exists and is a comma-separated string or JSON array. In the other case it returns a default value provided in the second argument.

func GetStruct 

func GetStruct(ctx context.Context, path string, value interface{}) (bool, error)

GetStruct reads a structured value of a named parameter from the module "TREE". It stores this value in the value pointed by the value argument and returns true if the parameter exists and was unmarshaled successfully. In the case of error or if the parameter is not exists, the function doesn't touch the value argument, so you can safely pass a default value as the value argument and completely ignore return values of this function. A value is unmarshaled from JSON using json.Unmarshal and is cached internally until the configuration is updated, so be careful to not modify values returned by a reference. Experimental: this function can be modified or removed without any notice.

func Initialize 

func Initialize(ctx context.Context, options ...onlineconfInterface.Option) (context.Context, error)

Initialize sets config directory for onlineconf modules. Default value is "/usr/local/etc/onlineconf"

func MakePath added in v0.0.2 

func MakePath(s ...string) string

func NewSubscription added in v0.0.2 

func NewSubscription(params []string, callback func() error) onlineconfInterface.SubscriptionCallback

func RegisterSubscription 

func RegisterSubscription(ctx context.Context, module string, params []string, callback func() error) error

func Release 

func Release(main, cloned context.Context) error

func StartWatcher 

func StartWatcher(ctx context.Context) error

func StopWatcher 

func StopWatcher(ctx context.Context) error

func ToContext 

func ToContext(ctx context.Context, oi onlineconfInterface.Instance) context.Context

func WithConfigDir 

func WithConfigDir(path string) onlineconfInterface.Option

func WithLogger 

func WithLogger(logger onlineconfInterface.Logger) onlineconfInterface.Option

func WithModules added in v0.0.2 

func WithModules(moduleNames []string, required bool) onlineconfInterface.Option

Types

type DefaultLogger 

type DefaultLogger struct{}

func (*DefaultLogger) Error 

func (l *DefaultLogger) Error(ctx context.Context, msg string, args ...any)

func (*DefaultLogger) Fatal 

func (l *DefaultLogger) Fatal(ctx context.Context, msg string, args ...any)

func (*DefaultLogger) Warn 

func (l *DefaultLogger) Warn(ctx context.Context, msg string, args ...any)

type Module 

type Module struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

func (*Module) Clone added in v0.0.2 

func (m *Module) Clone(name string) onlineconfInterface.Module

func (*Module) GetBool 

func (m *Module) GetBool(path string, d ...bool) (bool, error)

GetBool reads an bool value of a named parameter from the module. It returns this value if the parameter exists and is a bool. In the other case it return error unless default value is provided in the second argument.

func (*Module) GetBoolIfExists 

func (m *Module) GetBoolIfExists(path string) (bool, bool, error)

GetBoolIfExists reads an integer value of a named parameter from the module. It returns this value and the boolean true if the parameter exists and is an bool. In the other case it returns the boolean false and 0.

func (*Module) GetInt 

func (m *Module) GetInt(path string, d ...int) (int, error)

GetInt reads an integer value of a named parameter from the module. It returns this value if the parameter exists and is an integer. In the other case it return error unless default value is provided in the second argument.

func (*Module) GetIntIfExists 

func (m *Module) GetIntIfExists(path string) (int, bool, error)

GetIntIfExists reads an integer value of a named parameter from the module. It returns this value and the boolean true if the parameter exists and is an integer. In the other case it returns the boolean false and 0.

func (*Module) GetMmappedFile added in v0.0.2 

func (m *Module) GetMmappedFile() *mmap.ReaderAt

func (*Module) GetString 

func (m *Module) GetString(path string, d ...string) (string, error)

GetString reads a string value of a named parameter from the module. It returns this value if the parameter exists and is a string. In the other case it return error unless default value is provided in the second argument.

func (*Module) GetStringIfExists 

func (m *Module) GetStringIfExists(path string) (string, bool, error)

GetStringIfExists reads a string value of a named parameter from the module. It returns the boolean true if the parameter exists and is a string. In the other case it returns the boolean false and an empty string.

func (*Module) GetStrings 

func (m *Module) GetStrings(path string, defaultValue []string) ([]string, error)

GetStrings reads a []string value of a named parameter from the module. It returns this value if the parameter exists and is a comma-separated string or JSON array. In the other case it returns a default value provided in the second argument.

func (*Module) GetStruct 

func (m *Module) GetStruct(path string, value interface{}) (bool, error)

GetStruct reads a structured value of a named parameter from the module. It stores this value in the value pointed by the value argument and returns true if the parameter exists and was unmarshaled successfully. In the case of error or if the parameter is not exists, the method doesn't touch the value argument, so you can safely pass a default value as the value argument and completely ignore return values of this method. A value is unmarshaled from JSON using json.Unmarshal and is cached internally until the configuration is updated, so be careful to not modify values returned by a reference. Experimental: this method can be modified or removed without any notice.

func (*Module) RegisterSubscription 

func (m *Module) RegisterSubscription(subscription onlineconfInterface.SubscriptionCallback)

func (*Module) Reopen added in v0.0.2 

func (m *Module) Reopen(mmappedFile *mmap.ReaderAt) (*mmap.ReaderAt, error)

type OnlineconfInstance 

type OnlineconfInstance struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func FromContext 

func FromContext(ctx context.Context) *OnlineconfInstance

func (*OnlineconfInstance) Clone added in v0.0.2 

func (oi *OnlineconfInstance) Clone() (onlineconfInterface.Instance, error)

func (*OnlineconfInstance) GetBool 

func (oi *OnlineconfInstance) GetBool(path string, d ...bool) (bool, error)

GetBool reads an bool value of a named parameter from the module "TREE". It returns this value if the parameter exists and is a bool. In the other case it panics unless default value is provided in the second argument.

func (*OnlineconfInstance) GetBoolIfExists 

func (oi *OnlineconfInstance) GetBoolIfExists(path string) (bool, bool, error)

GetBoolIfExists reads an bool value of a named parameter from the module "TREE". It returns this value and the boolean true if the parameter exists and is a bool. In the other case it returns the boolean false and 0.

func (*OnlineconfInstance) GetConfigDir added in v0.0.2 

func (oi *OnlineconfInstance) GetConfigDir() string

func (*OnlineconfInstance) GetInt 

func (oi *OnlineconfInstance) GetInt(path string, d ...int) (int, error)

GetInt reads an integer value of a named parameter from the module "TREE". It returns this value if the parameter exists and is an integer. In the other case it panics unless default value is provided in the second argument.

func (*OnlineconfInstance) GetIntIfExists 

func (oi *OnlineconfInstance) GetIntIfExists(path string) (int, bool, error)

GetIntIfExists reads an integer value of a named parameter from the module "TREE". It returns this value and the boolean true if the parameter exists and is an integer. In the other case it returns the boolean false and 0.

func (*OnlineconfInstance) GetModule 

func (oi *OnlineconfInstance) GetModule(name string) onlineconfInterface.Module

GetModule returns a named module.

func (*OnlineconfInstance) GetModuleByFile 

func (oi *OnlineconfInstance) GetModuleByFile(fileName string) (onlineconfInterface.Module, bool)

func (*OnlineconfInstance) GetModuleNames added in v0.0.2 

func (oi *OnlineconfInstance) GetModuleNames() []string

func (*OnlineconfInstance) GetOrAddModule 

func (oi *OnlineconfInstance) GetOrAddModule(name string) (onlineconfInterface.Module, error)

GetModule returns a named module.

func (*OnlineconfInstance) GetString 

func (oi *OnlineconfInstance) GetString(path string, d ...string) (string, error)

GetString reads a string value of a named parameter from the module "TREE". It returns this value if the parameter exists and is a string. In the other case it panics unless default value is provided in the second argument.

func (*OnlineconfInstance) GetStringIfExists 

func (oi *OnlineconfInstance) GetStringIfExists(path string) (string, bool, error)

GetStringIfExists reads a string value of a named parameter from the module "TREE". It returns the boolean true if the parameter exists and is a string. In the other case it returns the boolean false and an empty string.

func (*OnlineconfInstance) GetStrings 

func (oi *OnlineconfInstance) GetStrings(path string, defaultValue []string) ([]string, error)

GetStrings reads a []string value of a named parameter from the module "TREE". It returns this value if the parameter exists and is a comma-separated string or JSON array. In the other case it returns a default value provided in the second argument.

func (*OnlineconfInstance) GetStruct 

func (oi *OnlineconfInstance) GetStruct(path string, value interface{}) (bool, error)

GetStruct reads a structured value of a named parameter from the module "TREE". It stores this value in the value pointed by the value argument and returns true if the parameter exists and was unmarshaled successfully. In the case of error or if the parameter is not exists, the function doesn't touch the value argument, so you can safely pass a default value as the value argument and completely ignore return values of this function. A value is unmarshaled from JSON using json.Unmarshal and is cached internally until the configuration is updated, so be careful to not modify values returned by a reference. Experimental: this function can be modified or removed without any notice.

func (*OnlineconfInstance) RegisterSubscription 

func (oi *OnlineconfInstance) RegisterSubscription(module string, params []string, callback func() error) error

func (*OnlineconfInstance) Release added in v0.0.2 

func (oi *OnlineconfInstance) Release(cloned onlineconfInterface.Instance) error

func (*OnlineconfInstance) StartWatcher 

func (oi *OnlineconfInstance) StartWatcher(ctx context.Context) error

func (*OnlineconfInstance) StopWatcher 

func (oi *OnlineconfInstance) StopWatcher() error

type OnlineconfWatcher 

type OnlineconfWatcher struct {
	sync.Mutex
	// contains filtered or unexported fields
}

type SubscriptionCallback 

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

func (*SubscriptionCallback) GetPaths added in v0.0.2 

func (s *SubscriptionCallback) GetPaths() []string

func (*SubscriptionCallback) InvokeCallback added in v0.0.2 

func (s *SubscriptionCallback) InvokeCallback() error

Source Files

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