mirror of https://github.com/status-im/consul.git
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package resolver
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import (
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"fmt"
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"sync"
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"google.golang.org/grpc/resolver"
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)
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// registry of ServerResolverBuilder. This type exists because grpc requires that
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// resolvers are registered globally before any requests are made. This is
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// incompatible with our resolver implementation and testing strategy, which
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// requires a different Resolver for each test.
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type registry struct {
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lock sync.RWMutex
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byAuthority map[string]*ServerResolverBuilder
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}
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func (r *registry) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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res, ok := r.byAuthority[target.Authority]
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if !ok {
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return nil, fmt.Errorf("no resolver registered for %v", target.Authority)
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}
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return res.Build(target, cc, opts)
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}
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func (r *registry) Scheme() string {
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return "consul"
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}
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var _ resolver.Builder = (*registry)(nil)
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var reg = ®istry{byAuthority: make(map[string]*ServerResolverBuilder)}
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func init() {
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resolver.Register(reg)
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}
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// Register a ServerResolverBuilder with the global registry.
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func Register(res *ServerResolverBuilder) {
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reg.lock.Lock()
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defer reg.lock.Unlock()
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reg.byAuthority[res.Authority()] = res
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}
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// Deregister the ServerResolverBuilder associated with the authority. Only used
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// for testing.
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func Deregister(authority string) {
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reg.lock.Lock()
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defer reg.lock.Unlock()
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delete(reg.byAuthority, authority)
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}
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