package xds import ( "fmt" "github.com/golang/protobuf/proto" "github.com/hashicorp/go-hclog" "github.com/hashicorp/consul/agent/proxycfg" "github.com/hashicorp/consul/agent/xds/xdscommon" ) // ResourceGenerator is associated with a single gRPC stream and creates xDS // resources for a single client. type ResourceGenerator struct { Logger hclog.Logger CfgFetcher ConfigFetcher IncrementalXDS bool ProxyFeatures supportedProxyFeatures } func newResourceGenerator( logger hclog.Logger, cfgFetcher ConfigFetcher, incrementalXDS bool, ) *ResourceGenerator { return &ResourceGenerator{ Logger: logger, CfgFetcher: cfgFetcher, IncrementalXDS: incrementalXDS, } } func (g *ResourceGenerator) allResourcesFromSnapshot(cfgSnap *proxycfg.ConfigSnapshot) (map[string][]proto.Message, error) { all := make(map[string][]proto.Message) for _, typeUrl := range []string{xdscommon.ListenerType, xdscommon.RouteType, xdscommon.ClusterType, xdscommon.EndpointType} { res, err := g.resourcesFromSnapshot(typeUrl, cfgSnap) if err != nil { return nil, fmt.Errorf("failed to generate xDS resources for %q: %v", typeUrl, err) } all[typeUrl] = res } return all, nil } func (g *ResourceGenerator) resourcesFromSnapshot(typeUrl string, cfgSnap *proxycfg.ConfigSnapshot) ([]proto.Message, error) { switch typeUrl { case xdscommon.ListenerType: return g.listenersFromSnapshot(cfgSnap) case xdscommon.RouteType: return g.routesFromSnapshot(cfgSnap) case xdscommon.ClusterType: return g.clustersFromSnapshot(cfgSnap) case xdscommon.EndpointType: return g.endpointsFromSnapshot(cfgSnap) default: return nil, fmt.Errorf("unknown typeUrl: %s", typeUrl) } }