48 lines
939 B
Go
48 lines
939 B
Go
package config
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import (
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"errors"
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"fmt"
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"strings"
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"sync"
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)
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var (
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ErrServerNameAlreadyRegistered = errors.New("server name is already registered")
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ErrNoSuchServer = errors.New("no known server with given name")
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DefaultLookup = &ServerLookup{
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servers: make(map[string]Server),
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}
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)
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type ServerLookup struct {
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lock sync.RWMutex
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servers map[string]Server
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}
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func (l *ServerLookup) Register(name string, srv Server) error {
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l.lock.Lock()
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defer l.lock.Unlock()
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name = strings.ToLower(name)
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if _, ok := l.servers[name]; ok {
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return fmt.Errorf("%w: %s", ErrServerNameAlreadyRegistered, name)
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}
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l.servers[name] = srv
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return nil
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}
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func (l *ServerLookup) Lookup(name string) (*Server, error) {
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l.lock.RLock()
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defer l.lock.RUnlock()
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name = strings.ToLower(name)
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match, ok := l.servers[name]
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if !ok {
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return nil, fmt.Errorf("%w: %s", ErrNoSuchServer, name)
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}
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return &match, nil
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}
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