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47 lines
1.6 KiB
47 lines
1.6 KiB
package registry
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import "context"
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// Registrar is service registrar.
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type Registrar interface {
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// Register the registration.
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Register(ctx context.Context, service *ServiceInstance) error
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// Deregister the registration.
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Deregister(ctx context.Context, service *ServiceInstance) error
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}
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// Discovery is service discovery.
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type Discovery interface {
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// Service return the service instances in memory according to the service name.
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Fetch(ctx context.Context, serviceName string) ([]*ServiceInstance, error)
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// Watch creates a watcher according to the service name.
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Watch(ctx context.Context, serviceName string) (Watcher, error)
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}
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// Watcher is service watcher.
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type Watcher interface {
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// Watch returns services in the following two cases:
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// 1.the first time to watch and the service instance list is not empty.
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// 2.any service instance changes found.
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// if the above two conditions are not met, it will block until context deadline exceeded or canceled
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Next() ([]*ServiceInstance, error)
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// Close close the watcher.
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Close() error
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}
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// ServiceInstance is an instance of a service in a discovery system.
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type ServiceInstance struct {
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// ID is the unique instance ID as registered.
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ID string
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// Name is the service name as registered.
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Name string
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// Version is the version of the compiled.
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Version string
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// Metadata is the kv pair metadata associated with the service instance.
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Metadata map[string]string
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// Endpoints is endpoint addresses of the service instance.
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// schema:
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// http://127.0.0.1:8000?isSecure=false
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// grpc://127.0.0.1:9000?isSecure=false
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Endpoints []string
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}
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