func TestQueryRowsScanned(t *testing.T) {
t.Parallel()
htraceBld := &MiniHTracedBuilder{Name: "TestQueryRowsScanned",
WrittenSpans: common.NewSemaphore(0),
}
ht, err := htraceBld.Build()
if err != nil {
panic(err)
}
defer ht.Close()
createSpans(SIMPLE_TEST_SPANS, ht.Store)
assertNumWrittenEquals(t, ht.Store.msink, len(SIMPLE_TEST_SPANS))
testQueryExt(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.EQUALS,
Field: common.SPAN_ID,
Val: common.TestId("00000000000000000000000000000001").String(),
},
},
Lim: 100,
Prev: nil,
}, []common.Span{SIMPLE_TEST_SPANS[0]},
[]int{2, 1})
}
// Test queries on the datastore.
func TestSimpleQuery(t *testing.T) {
t.Parallel()
htraceBld := &MiniHTracedBuilder{Name: "TestSimpleQuery",
Cnf: map[string]string{
conf.HTRACE_DATASTORE_HEARTBEAT_PERIOD_MS: "30000",
},
WrittenSpans: common.NewSemaphore(0),
}
ht, err := htraceBld.Build()
if err != nil {
panic(err)
}
defer ht.Close()
createSpans(SIMPLE_TEST_SPANS, ht.Store)
assertNumWrittenEquals(t, ht.Store.msink, len(SIMPLE_TEST_SPANS))
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.GREATER_THAN_OR_EQUALS,
Field: common.BEGIN_TIME,
Val: "125",
},
},
Lim: 5,
}, []common.Span{SIMPLE_TEST_SPANS[1], SIMPLE_TEST_SPANS[2]})
}
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 TestReapingOldSpans(t *testing.T) {
const NUM_TEST_SPANS = 20
testSpans := make([]*common.Span, NUM_TEST_SPANS)
rnd := rand.New(rand.NewSource(2))
now := common.TimeToUnixMs(time.Now().UTC())
for i := range testSpans {
testSpans[i] = test.NewRandomSpan(rnd, testSpans[0:i])
testSpans[i].Begin = now - int64(NUM_TEST_SPANS-1-i)
testSpans[i].Description = fmt.Sprintf("Span%02d", i)
}
htraceBld := &MiniHTracedBuilder{Name: "TestReapingOldSpans",
Cnf: map[string]string{
conf.HTRACE_SPAN_EXPIRY_MS: fmt.Sprintf("%d", 60*60*1000),
conf.HTRACE_REAPER_HEARTBEAT_PERIOD_MS: "1",
conf.HTRACE_DATASTORE_HEARTBEAT_PERIOD_MS: "1",
},
WrittenSpans: common.NewSemaphore(0),
DataDirs: make([]string, 2),
}
ht, err := htraceBld.Build()
if err != nil {
t.Fatalf("failed to create mini htraced cluster: %s\n", err.Error())
}
ing := ht.Store.NewSpanIngestor(ht.Store.lg, "127.0.0.1", "")
for spanIdx := range testSpans {
ing.IngestSpan(testSpans[spanIdx])
}
ing.Close(time.Now())
// Wait the spans to be created
ht.Store.WrittenSpans.Waits(NUM_TEST_SPANS)
// Set a reaper date that will remove all the spans except final one.
ht.Store.rpr.SetReaperDate(now)
common.WaitFor(5*time.Minute, time.Millisecond, func() bool {
for i := 0; i < NUM_TEST_SPANS-1; i++ {
span := ht.Store.FindSpan(testSpans[i].Id)
if span != nil {
ht.Store.lg.Debugf("Waiting for %s to be removed...\n",
testSpans[i].Description)
return false
}
}
span := ht.Store.FindSpan(testSpans[NUM_TEST_SPANS-1].Id)
if span == nil {
ht.Store.lg.Debugf("Did not expect %s to be removed\n",
testSpans[NUM_TEST_SPANS-1].Description)
return false
}
return true
})
defer ht.Close()
}
// Tests that HRPC limits the number of simultaneous connections being processed.
func TestHrpcAdmissionsControl(t *testing.T) {
var wg sync.WaitGroup
wg.Add(TEST_NUM_WRITESPANS)
var numConcurrentHrpcCalls int32
testHooks := &hrpcTestHooks{
HandleAdmission: func() {
defer wg.Done()
n := atomic.AddInt32(&numConcurrentHrpcCalls, 1)
if n > TEST_NUM_HRPC_HANDLERS {
t.Fatalf("The number of concurrent HRPC calls went above "+
"%d: it's at %d\n", TEST_NUM_HRPC_HANDLERS, n)
}
time.Sleep(1 * time.Millisecond)
n = atomic.AddInt32(&numConcurrentHrpcCalls, -1)
if n >= TEST_NUM_HRPC_HANDLERS {
t.Fatalf("The number of concurrent HRPC calls went above "+
"%d: it was at %d\n", TEST_NUM_HRPC_HANDLERS, n+1)
}
},
}
htraceBld := &MiniHTracedBuilder{Name: "TestHrpcAdmissionsControl",
DataDirs: make([]string, 2),
Cnf: map[string]string{
conf.HTRACE_NUM_HRPC_HANDLERS: fmt.Sprintf("%d", TEST_NUM_HRPC_HANDLERS),
},
WrittenSpans: common.NewSemaphore(0),
HrpcTestHooks: testHooks,
}
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())
}
// Create some random trace spans.
allSpans := createRandomTestSpans(TEST_NUM_WRITESPANS)
for iter := 0; iter < TEST_NUM_WRITESPANS; iter++ {
go func(i int) {
err = hcl.WriteSpans(allSpans[i : i+1])
if err != nil {
t.Fatalf("WriteSpans failed: %s\n", err.Error())
}
}(iter)
}
wg.Wait()
ht.Store.WrittenSpans.Waits(int64(TEST_NUM_WRITESPANS))
}
func TestQueries5(t *testing.T) {
t.Parallel()
htraceBld := &MiniHTracedBuilder{Name: "TestQueries5",
WrittenSpans: common.NewSemaphore(0),
DataDirs: make([]string, 1),
}
ht, err := htraceBld.Build()
if err != nil {
panic(err)
}
defer ht.Close()
createSpans(TEST_QUERIES5_SPANS, ht.Store)
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.GREATER_THAN,
Field: common.BEGIN_TIME,
Val: "123",
},
},
Lim: 5,
}, []common.Span{TEST_QUERIES5_SPANS[2]})
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.GREATER_THAN,
Field: common.END_TIME,
Val: "200",
},
},
Lim: 500,
}, []common.Span{TEST_QUERIES5_SPANS[0], TEST_QUERIES5_SPANS[2]})
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.LESS_THAN_OR_EQUALS,
Field: common.END_TIME,
Val: "999",
},
},
Lim: 500,
}, []common.Span{TEST_QUERIES5_SPANS[2],
TEST_QUERIES5_SPANS[0],
TEST_QUERIES5_SPANS[1],
})
}
// Test creating a datastore and adding some spans.
func TestDatastoreWriteAndRead(t *testing.T) {
t.Parallel()
htraceBld := &MiniHTracedBuilder{Name: "TestDatastoreWriteAndRead",
Cnf: map[string]string{
conf.HTRACE_DATASTORE_HEARTBEAT_PERIOD_MS: "30000",
},
WrittenSpans: common.NewSemaphore(0),
}
ht, err := htraceBld.Build()
if err != nil {
panic(err)
}
defer ht.Close()
createSpans(SIMPLE_TEST_SPANS, ht.Store)
span := ht.Store.FindSpan(common.TestId("00000000000000000000000000000001"))
if span == nil {
t.Fatal()
}
if !span.Id.Equal(common.TestId("00000000000000000000000000000001")) {
t.Fatal()
}
common.ExpectSpansEqual(t, &SIMPLE_TEST_SPANS[0], span)
children := ht.Store.FindChildren(common.TestId("00000000000000000000000000000001"), 1)
if len(children) != 1 {
t.Fatalf("expected 1 child, but got %d\n", len(children))
}
children = ht.Store.FindChildren(common.TestId("00000000000000000000000000000001"), 2)
if len(children) != 2 {
t.Fatalf("expected 2 children, but got %d\n", len(children))
}
sort.Sort(common.SpanIdSlice(children))
if !children[0].Equal(common.TestId("00000000000000000000000000000002")) {
t.Fatal()
}
if !children[1].Equal(common.TestId("00000000000000000000000000000003")) {
t.Fatal()
}
}
func BenchmarkDatastoreWrites(b *testing.B) {
htraceBld := &MiniHTracedBuilder{Name: "BenchmarkDatastoreWrites",
Cnf: map[string]string{
conf.HTRACE_DATASTORE_HEARTBEAT_PERIOD_MS: "30000",
conf.HTRACE_LOG_LEVEL: "INFO",
},
WrittenSpans: common.NewSemaphore(0),
}
ht, err := htraceBld.Build()
if err != nil {
b.Fatalf("Error creating MiniHTraced: %s\n", err.Error())
}
ht.Store.lg.Infof("BenchmarkDatastoreWrites: b.N = %d\n", b.N)
defer func() {
if r := recover(); r != nil {
ht.Store.lg.Infof("panic: %s\n", r.(error))
}
ht.Close()
}()
rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
allSpans := make([]*common.Span, b.N)
for n := range allSpans {
allSpans[n] = test.NewRandomSpan(rnd, allSpans[0:n])
}
// Reset the timer to avoid including the time required to create new
// random spans in the benchmark total.
b.ResetTimer()
// Write many random spans.
ing := ht.Store.NewSpanIngestor(ht.Store.lg, "127.0.0.1", "")
for n := 0; n < b.N; n++ {
ing.IngestSpan(allSpans[n])
}
ing.Close(time.Now())
// Wait for all the spans to be written.
ht.Store.WrittenSpans.Waits(int64(b.N))
assertNumWrittenEquals(b, ht.Store.msink, b.N)
}
func TestQueriesWithContinuationTokens1(t *testing.T) {
t.Parallel()
htraceBld := &MiniHTracedBuilder{Name: "TestQueriesWithContinuationTokens1",
Cnf: map[string]string{
conf.HTRACE_DATASTORE_HEARTBEAT_PERIOD_MS: "30000",
},
WrittenSpans: common.NewSemaphore(0),
}
ht, err := htraceBld.Build()
if err != nil {
panic(err)
}
defer ht.Close()
createSpans(SIMPLE_TEST_SPANS, ht.Store)
assertNumWrittenEquals(t, ht.Store.msink, len(SIMPLE_TEST_SPANS))
// Adding a prev value to this query excludes the first result that we
// would normally get.
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.GREATER_THAN,
Field: common.BEGIN_TIME,
Val: "120",
},
},
Lim: 5,
Prev: &SIMPLE_TEST_SPANS[0],
}, []common.Span{SIMPLE_TEST_SPANS[1], SIMPLE_TEST_SPANS[2]})
// There is only one result from an EQUALS query on SPAN_ID.
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.EQUALS,
Field: common.SPAN_ID,
Val: common.TestId("00000000000000000000000000000001").String(),
},
},
Lim: 100,
Prev: &SIMPLE_TEST_SPANS[0],
}, []common.Span{})
// When doing a LESS_THAN_OR_EQUALS search, we still don't get back the
// span we pass as a continuation token. (Primary index edition).
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.LESS_THAN_OR_EQUALS,
Field: common.SPAN_ID,
Val: common.TestId("00000000000000000000000000000002").String(),
},
},
Lim: 100,
Prev: &SIMPLE_TEST_SPANS[1],
}, []common.Span{SIMPLE_TEST_SPANS[0]})
// When doing a GREATER_THAN_OR_EQUALS search, we still don't get back the
// span we pass as a continuation token. (Secondary index edition).
testQuery(t, ht, &common.Query{
Predicates: []common.Predicate{
common.Predicate{
Op: common.GREATER_THAN,
Field: common.DURATION,
Val: "0",
},
},
Lim: 100,
Prev: &SIMPLE_TEST_SPANS[1],
}, []common.Span{SIMPLE_TEST_SPANS[2], SIMPLE_TEST_SPANS[0]})
}
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()
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, "+
"TotalShards to 3\n.",
asJson(sinfo), dld.shards[0].path, newDaemonId)
sinfo.DaemonId = newDaemonId
sinfo.TotalShards = 3
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, "TotalShards mismatch.")
// Open the datastore and modify it to have the wrong LayoutVersion
dld = NewDataStoreLoader(hcnf)
dld.LoadShards()
for shardIdx := range dld.shards {
sinfo, err = dld.shards[shardIdx].readShardInfo()
if err != nil {
t.Fatalf("error reading shard info for shard %s: %s\n",
dld.shards[shardIdx].path, err.Error())
}
dld.lg.Infof("Read %s from shard %s. Changing TotalShards to 2, "+
"LayoutVersion to 2\n", asJson(sinfo), dld.shards[shardIdx].path)
sinfo.TotalShards = 2
sinfo.LayoutVersion = 2
err = dld.shards[shardIdx].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, "The layout version of all shards is 2, "+
"but we only support")
// It should work with data.store.clear set.
htraceBld = &MiniHTracedBuilder{
Name: "TestReloadDataStore#clear",
DataDirs: dataDirs,
KeepDataDirsOnClose: true,
Cnf: map[string]string{conf.HTRACE_DATA_STORE_CLEAR: "true"},
}
ht, err = htraceBld.Build()
if err != nil {
t.Fatalf("failed to create datastore: %s", err.Error())
}
}
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()
}