Golang AmbientContext.AddLogTag方法代码示例

// Start starts the test cluster by bootstrapping an in-memory store
// (defaults to maximum of 50M). The server is started, launching the
// node RPC server and all HTTP endpoints. Use the value of
// TestServer.Addr after Start() for client connections. Use Stop()
// to shutdown the server after the test completes.
func (ltc *LocalTestCluster) Start(t util.Tester, baseCtx *base.Config, initSender InitSenderFn) {
	ambient := log.AmbientContext{Tracer: tracing.NewTracer()}
	nc := &base.NodeIDContainer{}
	ambient.AddLogTag("n", nc)

	nodeID := roachpb.NodeID(1)
	nodeDesc := &roachpb.NodeDescriptor{NodeID: nodeID}

	ltc.tester = t
	ltc.Manual = hlc.NewManualClock(0)
	ltc.Clock = hlc.NewClock(ltc.Manual.UnixNano)
	ltc.Stopper = stop.NewStopper()
	rpcContext := rpc.NewContext(ambient, baseCtx, ltc.Clock, ltc.Stopper)
	server := rpc.NewServer(rpcContext) // never started
	ltc.Gossip = gossip.New(ambient, nc, rpcContext, server, nil, ltc.Stopper, metric.NewRegistry())
	ltc.Eng = engine.NewInMem(roachpb.Attributes{}, 50<<20)
	ltc.Stopper.AddCloser(ltc.Eng)

	ltc.Stores = storage.NewStores(ambient, ltc.Clock)

	ltc.Sender = initSender(nodeDesc, ambient.Tracer, ltc.Clock, ltc.Latency, ltc.Stores, ltc.Stopper,
		ltc.Gossip)
	if ltc.DBContext == nil {
		dbCtx := client.DefaultDBContext()
		ltc.DBContext = &dbCtx
	}
	ltc.DB = client.NewDBWithContext(ltc.Sender, *ltc.DBContext)
	transport := storage.NewDummyRaftTransport()
	cfg := storage.TestStoreConfig()
	if ltc.RangeRetryOptions != nil {
		cfg.RangeRetryOptions = *ltc.RangeRetryOptions
	}
	cfg.AmbientCtx = ambient
	cfg.Clock = ltc.Clock
	cfg.DB = ltc.DB
	cfg.Gossip = ltc.Gossip
	cfg.Transport = transport
	cfg.MetricsSampleInterval = metric.TestSampleInterval
	ltc.Store = storage.NewStore(cfg, ltc.Eng, nodeDesc)
	if err := ltc.Store.Bootstrap(roachpb.StoreIdent{NodeID: nodeID, StoreID: 1}); err != nil {
		t.Fatalf("unable to start local test cluster: %s", err)
	}
	ltc.Stores.AddStore(ltc.Store)
	if err := ltc.Store.BootstrapRange(nil); err != nil {
		t.Fatalf("unable to start local test cluster: %s", err)
	}
	if err := ltc.Store.Start(context.Background(), ltc.Stopper); err != nil {
		t.Fatalf("unable to start local test cluster: %s", err)
	}
	nc.Set(context.TODO(), nodeDesc.NodeID)
	if err := ltc.Gossip.SetNodeDescriptor(nodeDesc); err != nil {
		t.Fatalf("unable to set node descriptor: %s", err)
	}
}

// MakeServer instantiates a new Server which services requests with data from
// the supplied DB.
func MakeServer(ambient log.AmbientContext, db *DB, cfg ServerConfig, stopper *stop.Stopper) Server {
	ambient.AddLogTag("ts-srv", nil)
	queryWorkerMax := queryWorkerMax
	if cfg.QueryWorkerMax != 0 {
		queryWorkerMax = cfg.QueryWorkerMax
	}
	return Server{
		AmbientContext: ambient,
		db:             db,
		stopper:        stopper,
		workerSem:      make(chan struct{}, queryWorkerMax),
	}
}

// NewTest is a simplified wrapper around New that creates the NodeIDContainer
// internally. Used for testing.
func NewTest(
	nodeID roachpb.NodeID,
	rpcContext *rpc.Context,
	grpcServer *grpc.Server,
	resolvers []resolver.Resolver,
	stopper *stop.Stopper,
	registry *metric.Registry,
) *Gossip {
	n := &base.NodeIDContainer{}
	var ac log.AmbientContext
	ac.AddLogTag("n", n)
	gossip := New(ac, n, rpcContext, grpcServer, resolvers, stopper, registry)
	if nodeID != 0 {
		n.Set(context.TODO(), nodeID)
	}
	return gossip
}

// PollSource begins a Goroutine which periodically queries the supplied
// DataSource for time series data, storing the returned data in the server.
// Stored data will be sampled using the provided Resolution. The polling
// process will continue until the provided stop.Stopper is stopped.
func (db *DB) PollSource(
	ambient log.AmbientContext,
	source DataSource,
	frequency time.Duration,
	r Resolution,
	stopper *stop.Stopper,
) {
	ambient.AddLogTag("ts-poll", nil)
	p := &poller{
		AmbientContext: ambient,
		db:             db,
		source:         source,
		frequency:      frequency,
		r:              r,
		stopper:        stopper,
	}
	p.start()
}

// newStatusServer allocates and returns a statusServer.
func newStatusServer(
	ambient log.AmbientContext,
	db *client.DB,
	gossip *gossip.Gossip,
	metricSource metricMarshaler,
	rpcCtx *rpc.Context,
	stores *storage.Stores,
) *statusServer {
	ambient.AddLogTag("status", nil)
	server := &statusServer{
		AmbientContext: ambient,
		db:             db,
		gossip:         gossip,
		metricSource:   metricSource,
		rpcCtx:         rpcCtx,
		stores:         stores,
	}

	return server
}