cache

package

v0.0.0-...-5abfbfe Latest Latest Go to latest Published: Mar 22, 2022 License: MIT Imports: 5 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/go-void/portal

Documentation ¶

Overview ¶

Package cache provides an in-memory cache to store answers from remote DNS servers

Index ¶

Variables
type Cache
type DefaultCache
- func NewDefaultCache(l *logger.Logger) *DefaultCache
type Status
- func (s Status) String() string

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	ErrNodeNotFound       = errors.New("cache: node not found in tree")
	ErrNoSuchData         = errors.New("cache: no such data")
	ErrChildAlreadyExists = errors.New("cache: child already exists")
)

Functions ¶

This section is empty.

Types ¶

type Cache ¶

type Cache interface {
	Lookup(string, uint16, uint16) ([]rr.RR, Status, error)

	LookupQuestion(dns.Question) ([]rr.RR, Status, error)

	Set(string, []rr.RR) error
}

Cache describes a cache interface to store RRs retrieved from remote DNS servers

type DefaultCache ¶

type DefaultCache struct {
	*tree.Tree
	// contains filtered or unexported fields
}

DefaultCache implements the Cache interface and stores RRs in an in-memory tree

func NewDefaultCache ¶

func NewDefaultCache(l *logger.Logger) *DefaultCache

NewDefaultCache returns a new default in-memory tree cache

func (*DefaultCache) Lookup ¶

func (c *DefaultCache) Lookup(name string, class, t uint16) ([]rr.RR, Status, error)

Lookup looks up a entry for name with class and type and returns the status and errors encountered along the way

func (*DefaultCache) LookupQuestion ¶

func (c *DefaultCache) LookupQuestion(message dns.Question) ([]rr.RR, Status, error)

LookupQuestion is a convenience function to lookup a DNS question

func (*DefaultCache) Set ¶

func (c *DefaultCache) Set(name string, records []rr.RR) error

Set sets (or adds) a new cache entry

type Status ¶

type Status int

const (
	Hit Status = iota
	Miss
	Expired
)

func (Status) String ¶

func (s Status) String() string

Source Files ¶

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