func (s *endpointServiceImpl) send(ctx context.Context, data []byte) error {
ctx = log.SetField(ctx, "endpointURL", s.url)
return retryCall(ctx, "endpoint.send", func() error {
startTime := clock.Now(ctx)
log.Debugf(ctx, "Pushing message to endpoint.")
req, err := http.NewRequest("POST", s.url, bytes.NewReader(data))
if err != nil {
log.Errorf(log.SetError(ctx, err), "Failed to create HTTP request.")
return err
}
req.Header.Add("content-type", protobufContentType)
req.Header.Add("user-agent", monitoringEndpointUserAgent)
resp, err := s.client.Do(req)
if err != nil {
// Treat a client error as transient.
log.Warningf(log.SetError(ctx, err), "Failed proxy client request.")
return errors.WrapTransient(err)
}
defer resp.Body.Close()
// Read the full response body. This will enable us to re-use the
// connection.
bodyData, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Errorf(log.SetError(ctx, err), "Error during endpoint connection.")
return errors.WrapTransient(err)
}
log.Fields{
"status": resp.Status,
"statusCode": resp.StatusCode,
"headers": resp.Header,
"contentLength": resp.ContentLength,
"body": string(bodyData),
"duration": clock.Now(ctx).Sub(startTime),
}.Debugf(ctx, "Received HTTP response from endpoint.")
if http.StatusOK <= resp.StatusCode && resp.StatusCode < http.StatusMultipleChoices {
log.Debugf(ctx, "Message pushed successfully.")
return nil
}
err = fmt.Errorf("http: server error (%d)", resp.StatusCode)
if resp.StatusCode >= http.StatusInternalServerError {
err = errors.WrapTransient(err)
}
log.Fields{
log.ErrorKey: err,
"status": resp.Status,
"statusCode": resp.StatusCode,
}.Warningf(ctx, "Proxy error.")
return err
})
}
func (a *application) proxySingleMessage(ctx context.Context, msg *pubsub.Message) error {
log.Debugf(ctx, "Sending data to monitoring endpoint.")
// Refuse to transmit message if it's too large.
if len(msg.Data) > maxMessageSize {
log.Fields{
"size": len(msg.Data),
"maxSize": maxMessageSize,
}.Errorf(ctx, "Message exceeds maximum size threshold; discarding.")
return errors.New("main: message is too large")
}
// Execute the request.
return a.endpoint.send(ctx, msg.Data)
}
// retryCall is a wrapper around the retry library that logs information about
// the retry attempts.
func retryCall(ctx context.Context, title string, f func() error) error {
log.Debugf(ctx, "Executing retriable call %s.", title)
err := retry.Retry(ctx, func() error {
return f()
}, func(err error, delay time.Duration) {
log.Fields{
log.ErrorKey: err,
"delay": delay,
}.Warningf(ctx, "Transient error encountered during %s; retrying.", title)
})
if err != nil {
log.Errorf(log.SetError(ctx, err), "Failed to %s.", title)
return err
}
return nil
}
// Main buffering function, which runs in a goroutine.
func (m *meter) consumeWork() {
// Acknowledge when this goroutine finishes.
defer close(m.closeAckC)
ctx := log.SetFilter(m.ctx, "meter")
timerRunning := false
flushTimer := clock.NewTimer(ctx)
defer func() {
flushTimer.Stop()
}()
flushCount := m.Count
flushTime := m.Delay
// Build our work buffer.
workBufferSize := initialWorkBufferSize
if flushCount > 0 {
// Will never buffer more than this much Work.
workBufferSize = flushCount
}
bufferedWork := make([]interface{}, 0, workBufferSize)
log.Debugf(ctx, "Starting work loop.")
active := true
for active {
flushRound := false
select {
case work, ok := <-m.workC:
if !ok {
log.Debugf(ctx, "Received instance close signal; terminating.")
// Don't immediately exit the loop, since there may still be buffered
// Work to flush.
active = false
flushRound = true
break
}
// Count the work in this group. If we're not using a given metric, try
// and avoid wasting time collecting it.
bufferedWork = append(bufferedWork, work)
// Handle work count threshold. We do this first, since it's trivial to
// setup/compute.
if flushCount > 0 && len(bufferedWork) >= flushCount {
flushRound = true
}
// Start our flush timer, if it's not already ticking. Only waste time
// doing this if we're not already flushing, since flushing will clear the
// timer.
if !flushRound && flushTime > 0 && !timerRunning {
log.Infof(log.SetFields(ctx, log.Fields{
"flushInterval": flushTime,
}), "Starting flush timer.")
flushTimer.Reset(flushTime)
timerRunning = true
}
// Invoke work callback, if one is set.
if m.IngestCallback != nil {
flushRound = m.IngestCallback(work) || flushRound
}
case <-m.flushNowC:
flushRound = true
case <-flushTimer.GetC():
log.Infof(ctx, "Flush timer has triggered.")
timerRunning = false
flushRound = true
}
// Should we flush?
if flushRound {
flushTimer.Stop()
timerRunning = false
if len(bufferedWork) > 0 {
// Clone bufferedWork, since we re-use it.
workToSend := make([]interface{}, len(bufferedWork))
copy(workToSend, bufferedWork)
// Clear our Work slice for re-use. This does not resize the underlying
// array, since it's likely to fill again.
for idx := range bufferedWork {
bufferedWork[idx] = nil
}
bufferedWork = bufferedWork[:0]
// Callback with this work.
m.Callback(workToSend)
}
}
}
}
func TestBasicDatastore(t *testing.T) {
t.Parallel()
Convey("basic", t, func() {
inst, err := aetest.NewInstance(&aetest.Options{
StronglyConsistentDatastore: true,
})
So(err, ShouldBeNil)
defer inst.Close()
req, err := inst.NewRequest("GET", "/", nil)
So(err, ShouldBeNil)
ctx := Use(context.Background(), req)
ds := datastore.Get(ctx)
mc := memcache.Get(ctx)
inf := info.Get(ctx)
Convey("logging allows you to tweak the level", func() {
// You have to visually confirm that this actually happens in the stdout
// of the test... yeah I know.
logging.Debugf(ctx, "SHOULD NOT SEE")
logging.Infof(ctx, "SHOULD SEE")
ctx = logging.SetLevel(ctx, logging.Debug)
logging.Debugf(ctx, "SHOULD SEE")
logging.Infof(ctx, "SHOULD SEE (2)")
})
Convey("Can probe/change Namespace", func() {
So(inf.GetNamespace(), ShouldEqual, "")
ctx, err = inf.Namespace("wat")
So(err, ShouldBeNil)
inf = info.Get(ctx)
So(inf.GetNamespace(), ShouldEqual, "wat")
ds = datastore.Get(ctx)
So(ds.MakeKey("Hello", "world").Namespace(), ShouldEqual, "wat")
})
Convey("Can get non-transactional context", func() {
ctx, err := inf.Namespace("foo")
So(err, ShouldBeNil)
ds = datastore.Get(ctx)
inf = info.Get(ctx)
ds.RunInTransaction(func(ctx context.Context) error {
So(ds.MakeKey("Foo", "bar").Namespace(), ShouldEqual, "foo")
So(ds.Put(&TestStruct{ValueI: []int64{100}}), ShouldBeNil)
err = datastore.GetNoTxn(ctx).RunInTransaction(func(ctx context.Context) error {
ds = datastore.Get(ctx)
So(ds.MakeKey("Foo", "bar").Namespace(), ShouldEqual, "foo")
So(ds.Put(&TestStruct{ValueI: []int64{100}}), ShouldBeNil)
return nil
}, nil)
So(err, ShouldBeNil)
return nil
}, nil)
})
Convey("Can Put/Get", func() {
orig := TestStruct{
ValueI: []int64{1, 7, 946688461000000, 996688461000000},
ValueB: []bool{true, false},
ValueS: []string{"hello", "world"},
ValueF: []float64{1.0, 7.0, 946688461000000.0, 996688461000000.0},
ValueBS: [][]byte{
[]byte("allo"),
[]byte("hello"),
[]byte("world"),
[]byte("zurple"),
},
ValueK: []*datastore.Key{
ds.NewKey("Something", "Cool", 0, nil),
ds.NewKey("Something", "", 1, nil),
ds.NewKey("Something", "Recursive", 0,
ds.NewKey("Parent", "", 2, nil)),
},
ValueBK: []blobstore.Key{"bellow", "hello"},
ValueGP: []datastore.GeoPoint{
{Lat: 120.7, Lng: 95.5},
},
}
So(ds.Put(&orig), ShouldBeNil)
ret := TestStruct{ID: orig.ID}
So(ds.Get(&ret), ShouldBeNil)
So(ret, ShouldResemble, orig)
// can't be sure the indexes have caught up... so sleep
time.Sleep(time.Second)
Convey("Can query", func() {
q := datastore.NewQuery("TestStruct")
ds.Run(q, func(ts *TestStruct) {
So(*ts, ShouldResemble, orig)
})
count, err := ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 1)
})
Convey("Can project", func() {
q := datastore.NewQuery("TestStruct").Project("ValueS")
rslts := []datastore.PropertyMap{}
So(ds.GetAll(q, &rslts), ShouldBeNil)
So(rslts, ShouldResemble, []datastore.PropertyMap{
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueS": {mp("hello")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueS": {mp("world")},
},
})
q = datastore.NewQuery("TestStruct").Project("ValueBS")
rslts = []datastore.PropertyMap{}
So(ds.GetAll(q, &rslts), ShouldBeNil)
So(rslts, ShouldResemble, []datastore.PropertyMap{
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueBS": {mp("allo")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueBS": {mp("hello")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueBS": {mp("world")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueBS": {mp("zurple")},
},
})
count, err := ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 4)
q = datastore.NewQuery("TestStruct").Lte("ValueI", 7).Project("ValueS").Distinct(true)
rslts = []datastore.PropertyMap{}
So(ds.GetAll(q, &rslts), ShouldBeNil)
So(rslts, ShouldResemble, []datastore.PropertyMap{
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueI": {mp(1)},
"ValueS": {mp("hello")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueI": {mp(1)},
"ValueS": {mp("world")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueI": {mp(7)},
"ValueS": {mp("hello")},
},
{
"$key": {mpNI(ds.KeyForObj(&orig))},
"ValueI": {mp(7)},
"ValueS": {mp("world")},
},
})
count, err = ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 4)
})
})
Convey("Can Put/Get (time)", func() {
// time comparisons in Go are wonky, so this is pulled out
pm := datastore.PropertyMap{
"$key": {mpNI(ds.NewKey("Something", "value", 0, nil))},
"Time": {
mp(time.Date(1938, time.January, 1, 1, 1, 1, 1, time.UTC)),
mp(time.Time{}),
},
}
So(ds.Put(&pm), ShouldBeNil)
rslt := datastore.PropertyMap{}
rslt.SetMeta("key", ds.KeyForObj(pm))
So(ds.Get(&rslt), ShouldBeNil)
So(pm["Time"][0].Value(), ShouldResemble, rslt["Time"][0].Value())
q := datastore.NewQuery("Something").Project("Time")
all := []datastore.PropertyMap{}
So(ds.GetAll(q, &all), ShouldBeNil)
So(len(all), ShouldEqual, 2)
prop := all[0]["Time"][0]
So(prop.Type(), ShouldEqual, datastore.PTInt)
tval, err := prop.Project(datastore.PTTime)
So(err, ShouldBeNil)
So(tval, ShouldResemble, time.Time{}.UTC())
tval, err = all[1]["Time"][0].Project(datastore.PTTime)
So(err, ShouldBeNil)
So(tval, ShouldResemble, pm["Time"][0].Value())
ent := datastore.PropertyMap{
"$key": {mpNI(ds.MakeKey("Something", "value"))},
}
So(ds.Get(&ent), ShouldBeNil)
So(ent["Time"], ShouldResemble, pm["Time"])
})
Convey("memcache: Set (nil) is the same as Set ([]byte{})", func() {
So(mc.Set(mc.NewItem("bob")), ShouldBeNil) // normally would panic because Value is nil
bob, err := mc.Get("bob")
So(err, ShouldBeNil)
So(bob.Value(), ShouldResemble, []byte{})
})
})
}
func TestGoLogger(t *testing.T) {
Convey(`A new Go Logger instance`, t, func() {
// Regex to pull log information from "formatString".
buf := bytes.Buffer{}
l := New(&buf, gol.DEBUG)
for _, entry := range []struct {
L logging.Level
F func(string, ...interface{})
T string
}{
{logging.Debug, l.Debugf, "DEBU"},
{logging.Info, l.Infof, "INFO"},
{logging.Warning, l.Warningf, "WARN"},
{logging.Error, l.Errorf, "ERRO"},
} {
Convey(fmt.Sprintf("Can log to: %s", entry.L), func() {
entry.F("Test logging %s", entry.L)
matches := lre.FindAllStringSubmatch(normalizeLog(buf.String()), -1)
So(len(matches), ShouldEqual, 1)
So(len(matches[0]), ShouldEqual, 4)
So(matches[0][1], ShouldEqual, "gologger_test.go")
So(matches[0][2], ShouldEqual, entry.T)
So(matches[0][3], ShouldEqual, fmt.Sprintf("Test logging %s", entry.L))
})
}
})
Convey(`A Go Logger instance installed in a Context at Info.`, t, func() {
buf := bytes.Buffer{}
lc := &LoggerConfig{
Format: standardConfig.Format,
Out: &buf,
Level: gol.DEBUG,
}
c := logging.SetLevel(lc.Use(context.Background()), logging.Info)
Convey(`Should log through top-level Context methods.`, func() {
for _, entry := range []struct {
L logging.Level
F func(context.Context, string, ...interface{})
T string
}{
{logging.Info, logging.Infof, "INFO"},
{logging.Warning, logging.Warningf, "WARN"},
{logging.Error, logging.Errorf, "ERRO"},
} {
Convey(fmt.Sprintf("Can log to: %s", entry.L), func() {
entry.F(c, "Test logging %s", entry.L)
matches := lre.FindAllStringSubmatch(normalizeLog(buf.String()), -1)
So(len(matches), ShouldEqual, 1)
So(len(matches[0]), ShouldEqual, 4)
So(matches[0][1], ShouldEqual, "gologger_test.go")
So(matches[0][2], ShouldEqual, entry.T)
So(matches[0][3], ShouldEqual, fmt.Sprintf("Test logging %s", entry.L))
})
}
})
Convey(`With Fields installed in the Context`, func() {
c = logging.SetFields(c, logging.Fields{
logging.ErrorKey: "An error!",
"reason": "test",
})
Convey(`Should log Fields.`, func() {
logging.Infof(c, "Here is a %s", "log")
matches := lre.FindAllStringSubmatch(normalizeLog(buf.String()), -1)
So(len(matches), ShouldEqual, 1)
So(len(matches[0]), ShouldEqual, 4)
So(matches[0][1], ShouldEqual, "gologger_test.go")
So(matches[0][2], ShouldEqual, "INFO")
So(matches[0][3], ShouldEqual,
`Here is a log {"error":"An error!", "reason":"test"}`)
})
Convey(`Should log fields installed immediately`, func() {
logging.Fields{
"foo": "bar",
"reason": "override",
}.Infof(c, "Here is another %s", "log")
matches := lre.FindAllStringSubmatch(normalizeLog(buf.String()), -1)
So(len(matches), ShouldEqual, 1)
So(len(matches[0]), ShouldEqual, 4)
So(matches[0][1], ShouldEqual, "gologger_test.go")
So(matches[0][2], ShouldEqual, "INFO")
So(matches[0][3], ShouldEqual,
`Here is another log {"error":"An error!", "foo":"bar", "reason":"override"}`)
})
})
Convey(`Will not log to Debug, as it's below level.`, func() {
logging.Debugf(c, "Hello!")
So(buf.Len(), ShouldEqual, 0)
})
})
}