Golang Client.Close方法代码示例

func TestClientGetServerDebugInfo(t *testing.T) {
	htraceBld := &MiniHTracedBuilder{Name: "TestClientGetServerDebugInfo",
		DataDirs: make([]string, 2)}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	defer ht.Close()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	defer hcl.Close()
	debugInfo, err := hcl.GetServerDebugInfo()
	if err != nil {
		t.Fatalf("failed to call GetServerDebugInfo: %s", err.Error())
	}
	if debugInfo.StackTraces == "" {
		t.Fatalf(`debugInfo.StackTraces == ""`)
	}
	if debugInfo.GCStats == "" {
		t.Fatalf(`debugInfo.GCStats == ""`)
	}
}

func verifySuccessfulLoad(t *testing.T, allSpans common.SpanSlice,
	dataDirs []string) {
	htraceBld := &MiniHTracedBuilder{
		Name:                "TestReloadDataStore#verifySuccessfulLoad",
		DataDirs:            dataDirs,
		KeepDataDirsOnClose: true,
	}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	defer ht.Close()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	defer hcl.Close()
	for i := 0; i < len(allSpans); i++ {
		span, err := hcl.FindSpan(allSpans[i].Id)
		if err != nil {
			t.Fatalf("FindSpan(%d) failed: %s\n", i, err.Error())
		}
		common.ExpectSpansEqual(t, allSpans[i], span)
	}
	// Look up the spans we wrote.
	var span *common.Span
	for i := 0; i < len(allSpans); i++ {
		span, err = hcl.FindSpan(allSpans[i].Id)
		if err != nil {
			t.Fatalf("FindSpan(%d) failed: %s\n", i, err.Error())
		}
		common.ExpectSpansEqual(t, allSpans[i], span)
	}
}

func TestClientGetServerConf(t *testing.T) {
	htraceBld := &MiniHTracedBuilder{Name: "TestClientGetServerConf",
		Cnf: map[string]string{
			EXAMPLE_CONF_KEY: EXAMPLE_CONF_VALUE,
		},
		DataDirs: make([]string, 2)}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	defer ht.Close()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	defer hcl.Close()
	serverCnf, err2 := hcl.GetServerConf()
	if err2 != nil {
		t.Fatalf("failed to call GetServerConf: %s", err2.Error())
	}
	if serverCnf[EXAMPLE_CONF_KEY] != EXAMPLE_CONF_VALUE {
		t.Fatalf("unexpected value for %s: %s",
			EXAMPLE_CONF_KEY, EXAMPLE_CONF_VALUE)
	}
}

func TestDumpAll(t *testing.T) {
	htraceBld := &MiniHTracedBuilder{Name: "TestDumpAll",
		DataDirs:     make([]string, 2),
		WrittenSpans: common.NewSemaphore(0),
		Cnf: map[string]string{
			conf.HTRACE_LOG_LEVEL: "INFO",
		},
	}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	defer ht.Close()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	defer hcl.Close()

	NUM_TEST_SPANS := 100
	allSpans := createRandomTestSpans(NUM_TEST_SPANS)
	sort.Sort(allSpans)
	err = hcl.WriteSpans(allSpans)
	if err != nil {
		t.Fatalf("WriteSpans failed: %s\n", err.Error())
	}
	ht.Store.WrittenSpans.Waits(int64(NUM_TEST_SPANS))
	out := make(chan *common.Span, NUM_TEST_SPANS)
	var dumpErr error
	go func() {
		dumpErr = hcl.DumpAll(3, out)
	}()
	var numSpans int
	nextLogTime := time.Now().Add(time.Millisecond * 5)
	for {
		span, channelOpen := <-out
		if !channelOpen {
			break
		}
		common.ExpectSpansEqual(t, allSpans[numSpans], span)
		numSpans++
		if testing.Verbose() {
			now := time.Now()
			if !now.Before(nextLogTime) {
				nextLogTime = now
				nextLogTime = nextLogTime.Add(time.Millisecond * 5)
				fmt.Printf("read back %d span(s)...\n", numSpans)
			}
		}
	}
	if numSpans != len(allSpans) {
		t.Fatalf("expected to read %d spans... but only read %d\n",
			len(allSpans), numSpans)
	}
	if dumpErr != nil {
		t.Fatalf("got dump error %s\n", dumpErr.Error())
	}
}

func TestClientGetServerVersion(t *testing.T) {
	htraceBld := &MiniHTracedBuilder{Name: "TestClientGetServerVersion",
		DataDirs: make([]string, 2)}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	defer ht.Close()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	defer hcl.Close()
	_, err = hcl.GetServerVersion()
	if err != nil {
		t.Fatalf("failed to call GetServerVersion: %s", err.Error())
	}
}

func TestReloadDataStore(t *testing.T) {
	htraceBld := &MiniHTracedBuilder{Name: "TestReloadDataStore",
		Cnf: map[string]string{
			conf.HTRACE_DATASTORE_HEARTBEAT_PERIOD_MS: "30000",
		},
		DataDirs:            make([]string, 2),
		KeepDataDirsOnClose: true,
		WrittenSpans:        common.NewSemaphore(0),
	}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	dataDirs := make([]string, len(ht.DataDirs))
	copy(dataDirs, ht.DataDirs)
	defer func() {
		if ht != nil {
			ht.Close()
		}
		for i := range dataDirs {
			os.RemoveAll(dataDirs[i])
		}
	}()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	hcnf := ht.Cnf.Clone()

	// Create some random trace spans.
	NUM_TEST_SPANS := 5
	allSpans := createRandomTestSpans(NUM_TEST_SPANS)
	err = hcl.WriteSpans(allSpans)
	if err != nil {
		t.Fatalf("WriteSpans failed: %s\n", err.Error())
	}
	ht.Store.WrittenSpans.Waits(int64(NUM_TEST_SPANS))

	// Look up the spans we wrote.
	var span *common.Span
	for i := 0; i < NUM_TEST_SPANS; i++ {
		span, err = hcl.FindSpan(allSpans[i].Id)
		if err != nil {
			t.Fatalf("FindSpan(%d) failed: %s\n", i, err.Error())
		}
		common.ExpectSpansEqual(t, allSpans[i], span)
	}
	hcl.Close()
	ht.Close()
	ht = nil

	// Verify that we can reload the datastore, even if we configure the data
	// directories in a different order.
	verifySuccessfulLoad(t, allSpans, []string{dataDirs[1], dataDirs[0]})

	// If we try to reload the datastore with only one directory, it won't work
	// (we need both).
	verifyFailedLoad(t, []string{dataDirs[1]},
		"The TotalShards field of all shards is 2, but we have 1 shards.")

	// Test that we give an intelligent error message when 0 directories are
	// configured.
	verifyFailedLoad(t, []string{}, "No shard directories found.")

	// Can't specify the same directory more than once... will get "lock
	// already held by process"
	verifyFailedLoad(t, []string{dataDirs[0], dataDirs[1], dataDirs[1]},
		" already held by process.")

	// Open the datastore and modify it to have the wrong DaemonId
	dld := NewDataStoreLoader(hcnf)
	defer func() {
		if dld != nil {
			dld.Close()
			dld = nil
		}
	}()
	dld.LoadShards()
	sinfo, err := dld.shards[0].readShardInfo()
	if err != nil {
		t.Fatalf("error reading shard info for shard %s: %s\n",
			dld.shards[0].path, err.Error())
	}
	newDaemonId := sinfo.DaemonId + 1
	dld.lg.Infof("Read %s from shard %s.  Changing daemonId to 0x%016x\n.",
		asJson(sinfo), dld.shards[0].path, newDaemonId)
	sinfo.DaemonId = newDaemonId
	err = dld.shards[0].writeShardInfo(sinfo)
	if err != nil {
		t.Fatalf("error writing shard info for shard %s: %s\n",
			dld.shards[0].path, err.Error())
	}
	dld.Close()
	dld = nil
	verifyFailedLoad(t, dataDirs, "DaemonId mismatch.")

	// Open the datastore and modify it to have the wrong TotalShards
	dld = NewDataStoreLoader(hcnf)
	dld.LoadShards()
//.........这里部分代码省略.........

func TestClientOperations(t *testing.T) {
	htraceBld := &MiniHTracedBuilder{Name: "TestClientOperations",
		DataDirs:     make([]string, 2),
		WrittenSpans: common.NewSemaphore(0),
	}
	ht, err := htraceBld.Build()
	if err != nil {
		t.Fatalf("failed to create datastore: %s", err.Error())
	}
	defer ht.Close()
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		t.Fatalf("failed to create client: %s", err.Error())
	}
	defer hcl.Close()

	// Create some random trace spans.
	NUM_TEST_SPANS := 30
	allSpans := createRandomTestSpans(NUM_TEST_SPANS)

	// Write half of the spans to htraced via the client.
	err = hcl.WriteSpans(allSpans[0 : NUM_TEST_SPANS/2])
	if err != nil {
		t.Fatalf("WriteSpans(0:%d) failed: %s\n", NUM_TEST_SPANS/2,
			err.Error())
	}
	ht.Store.WrittenSpans.Waits(int64(NUM_TEST_SPANS / 2))

	// Look up the first half of the spans.  They should be found.
	var span *common.Span
	for i := 0; i < NUM_TEST_SPANS/2; i++ {
		span, err = hcl.FindSpan(allSpans[i].Id)
		if err != nil {
			t.Fatalf("FindSpan(%d) failed: %s\n", i, err.Error())
		}
		common.ExpectSpansEqual(t, allSpans[i], span)
	}

	// Look up the second half of the spans.  They should not be found.
	for i := NUM_TEST_SPANS / 2; i < NUM_TEST_SPANS; i++ {
		span, err = hcl.FindSpan(allSpans[i].Id)
		if err != nil {
			t.Fatalf("FindSpan(%d) failed: %s\n", i, err.Error())
		}
		if span != nil {
			t.Fatalf("Unexpectedly found a span we never write to "+
				"the server: FindSpan(%d) succeeded\n", i)
		}
	}

	// Test FindChildren
	childSpan := allSpans[1]
	parentId := childSpan.Parents[0]
	var children []common.SpanId
	children, err = hcl.FindChildren(parentId, 1)
	if err != nil {
		t.Fatalf("FindChildren(%s) failed: %s\n", parentId, err.Error())
	}
	if len(children) != 1 {
		t.Fatalf("FindChildren(%s) returned an invalid number of "+
			"children: expected %d, got %d\n", parentId, 1, len(children))
	}
	if !children[0].Equal(childSpan.Id) {
		t.Fatalf("FindChildren(%s) returned an invalid child id: expected %s, "+
			" got %s\n", parentId, childSpan.Id, children[0])
	}

	// Test FindChildren on a span that has no children
	childlessSpan := allSpans[NUM_TEST_SPANS/2]
	children, err = hcl.FindChildren(childlessSpan.Id, 10)
	if err != nil {
		t.Fatalf("FindChildren(%d) failed: %s\n", childlessSpan.Id, err.Error())
	}
	if len(children) != 0 {
		t.Fatalf("FindChildren(%d) returned an invalid number of "+
			"children: expected %d, got %d\n", childlessSpan.Id, 0, len(children))
	}

	// Test Query
	var query common.Query
	query = common.Query{Lim: 10}
	spans, err := hcl.Query(&query)
	if err != nil {
		t.Fatalf("Query({lim: %d}) failed: %s\n", 10, err.Error())
	}
	if len(spans) != 10 {
		t.Fatalf("Query({lim: %d}) returned an invalid number of "+
			"children: expected %d, got %d\n", 10, 10, len(spans))
	}
}

func doWriteSpans(name string, N int, maxSpansPerRpc uint32, b *testing.B) {
	htraceBld := &MiniHTracedBuilder{Name: "doWriteSpans",
		Cnf: map[string]string{
			conf.HTRACE_LOG_LEVEL:         "INFO",
			conf.HTRACE_NUM_HRPC_HANDLERS: "20",
		},
		WrittenSpans: common.NewSemaphore(int64(1 - N)),
	}
	ht, err := htraceBld.Build()
	if err != nil {
		panic(err)
	}
	defer ht.Close()
	rnd := rand.New(rand.NewSource(1))
	allSpans := make([]*common.Span, N)
	for n := 0; n < N; n++ {
		allSpans[n] = test.NewRandomSpan(rnd, allSpans[0:n])
	}
	// Determine how many calls to WriteSpans we should make.  Each writeSpans
	// message should be small enough so that it doesn't exceed the max RPC
	// body length limit.  TODO: a production-quality golang client would do
	// this internally rather than needing us to do it here in the unit test.
	bodyLen := (4 * common.MAX_HRPC_BODY_LENGTH) / 5
	reqs := make([][]*common.Span, 0, 4)
	curReq := -1
	curReqLen := bodyLen
	var curReqSpans uint32
	mh := new(codec.MsgpackHandle)
	mh.WriteExt = true
	var mbuf [8192]byte
	buf := mbuf[:0]
	enc := codec.NewEncoderBytes(&buf, mh)
	for n := 0; n < N; n++ {
		span := allSpans[n]
		if (curReqSpans >= maxSpansPerRpc) ||
			(curReqLen >= bodyLen) {
			reqs = append(reqs, make([]*common.Span, 0, 16))
			curReqLen = 0
			curReq++
			curReqSpans = 0
		}
		buf = mbuf[:0]
		enc.ResetBytes(&buf)
		err := enc.Encode(span)
		if err != nil {
			panic(fmt.Sprintf("Error encoding span %s: %s\n",
				span.String(), err.Error()))
		}
		bufLen := len(buf)
		if bufLen > (bodyLen / 5) {
			panic(fmt.Sprintf("Span too long at %d bytes\n", bufLen))
		}
		curReqLen += bufLen
		reqs[curReq] = append(reqs[curReq], span)
		curReqSpans++
	}
	ht.Store.lg.Infof("num spans: %d.  num WriteSpansReq calls: %d\n", N, len(reqs))
	var hcl *htrace.Client
	hcl, err = htrace.NewClient(ht.ClientConf(), nil)
	if err != nil {
		panic(fmt.Sprintf("failed to create client: %s", err.Error()))
	}
	defer hcl.Close()

	// Reset the timer to avoid including the time required to create new
	// random spans in the benchmark total.
	if b != nil {
		b.ResetTimer()
	}

	// Write many random spans.
	for reqIdx := range reqs {
		go func(i int) {
			err = hcl.WriteSpans(reqs[i])
			if err != nil {
				panic(fmt.Sprintf("failed to send WriteSpans request %d: %s",
					i, err.Error()))
			}
		}(reqIdx)
	}
	// Wait for all the spans to be written.
	ht.Store.WrittenSpans.Wait()
}