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entities-service.go
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entities-service.go
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package entities
import (
"context"
"go.uber.org/fx"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/emptypb"
cmdv1 "github.com/fluxninja/aperture/api/v2/gen/proto/go/aperture/cmd/v1"
entitiesv1 "github.com/fluxninja/aperture/api/v2/gen/proto/go/aperture/discovery/entities/v1"
"github.com/fluxninja/aperture/v2/pkg/etcd/transport"
)
// EntitiesService is the implementation of entitiesv1.EntitiesService interface.
type EntitiesService struct {
entitiesv1.UnimplementedEntitiesServiceServer
entityCache *Entities
}
// RegisterEntitiesServiceIn bundles and annotates parameters.
type RegisterEntitiesServiceIn struct {
fx.In
Server *grpc.Server `name:"default"`
Cache *Entities
EtcdTransportServer *transport.EtcdTransportServer
}
// RegisterEntitiesService registers a service for entity cache.
func RegisterEntitiesService(in RegisterEntitiesServiceIn) error {
svc := &EntitiesService{
entityCache: in.Cache,
}
entitiesv1.RegisterEntitiesServiceServer(in.Server, svc)
err := transport.RegisterFunction(in.EtcdTransportServer, svc.ListDiscoveryEntities)
if err != nil {
return err
}
err = transport.RegisterFunction(in.EtcdTransportServer, svc.ListDiscoveryEntity)
if err != nil {
return err
}
return nil
}
// GetEntities returns *entitiesv1.Entities which contains mappings of ip address to entity and entity name to entity.
func (c *EntitiesService) GetEntities(ctx context.Context, _ *emptypb.Empty) (*entitiesv1.Entities, error) {
ec := c.entityCache.GetEntities()
return &entitiesv1.Entities{
EntitiesByIpAddress: ec.EntitiesByIpAddress,
EntitiesByName: ec.EntitiesByName,
}, nil
}
// GetEntityByIPAddress returns an entity by IP address.
func (c *EntitiesService) GetEntityByIPAddress(ctx context.Context, req *entitiesv1.GetEntityByIPAddressRequest) (*entitiesv1.Entity, error) {
e, err := c.entityCache.GetByIP(req.GetIpAddress())
if err != nil {
return nil, status.Error(codes.NotFound, err.Error())
}
return e.Clone(), nil
}
// GetEntityByName returns an entity by name.
func (c *EntitiesService) GetEntityByName(ctx context.Context, req *entitiesv1.GetEntityByNameRequest) (*entitiesv1.Entity, error) {
e, err := c.entityCache.GetByName(req.GetName())
if err != nil {
return nil, status.Error(codes.NotFound, err.Error())
}
return e.Clone(), nil
}
// ListDiscoveryEntities lists currently discovered entities by IP address.
func (c *EntitiesService) ListDiscoveryEntities(ctx context.Context, _ *cmdv1.ListDiscoveryEntitiesRequest) (*cmdv1.ListDiscoveryEntitiesAgentResponse, error) {
ec := c.entityCache.GetEntities()
return &cmdv1.ListDiscoveryEntitiesAgentResponse{
Entities: ec.EntitiesByIpAddress.Entities,
}, nil
}
// ListDiscoveryEntity returns an entity by IP address or name.
func (c *EntitiesService) ListDiscoveryEntity(ctx context.Context, req *cmdv1.ListDiscoveryEntityRequest) (*cmdv1.ListDiscoveryEntityAgentResponse, error) {
// check if request is for an IP address or name
switch req.By.(type) {
case *cmdv1.ListDiscoveryEntityRequest_IpAddress:
entity, err := c.entityCache.GetByIP(req.GetIpAddress())
if err != nil {
return nil, err
}
return &cmdv1.ListDiscoveryEntityAgentResponse{
Entity: entity.Clone(),
}, nil
case *cmdv1.ListDiscoveryEntityRequest_Name:
entity, err := c.entityCache.GetByName(req.GetName())
if err != nil {
return nil, err
}
return &cmdv1.ListDiscoveryEntityAgentResponse{
Entity: entity.Clone(),
}, nil
default:
return nil, nil
}
}