Golang variable.ProtoToString函數代碼示例

func (s *MySuite) TestAverage(c *C) {
	ctx, cancel := context.WithCancel(context.Background())
	e := NewExporter(ctx, s.Client, 10*time.Second)
	a := NewAverage(e, variable.NewFromString("/test/average"))

	a.Update(95, 1)
	a.Update(100, 1)
	a.Update(105, 1)

	// Force export
	streams := e.GetStreams()
	c.Assert(len(streams), Equals, 2)
	for _, stream := range streams {
		switch variable.ProtoToString(stream.Variable) {
		case "/test/average-total-count":
			c.Check(stream.Value[0].DoubleValue, Equals, 300.0)
		case "/test/average-overall-sum":
			c.Check(stream.Value[0].DoubleValue, Equals, 3.0)
		default:
			fmt.Printf("Invalid variable %s", variable.ProtoToString(stream.Variable))
			c.Fail()
		}
	}
	cancel()
	<-ctx.Done()
}

func (s *MySuite) TestMean(c *C) {
	q, err := Parse("mean by (xyz) (/test{host=a}, /test{host=b})")
	c.Assert(err, IsNil)
	query := q.query
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Variable[0]), Equals, "/test{host=a}")
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Variable[1]), Equals, "/test{host=b}")
	c.Check(query.Aggregation[0].Type, Equals, oproto.StreamAggregation_MEAN)
	c.Check(query.Aggregation[0].Label[0], Equals, "xyz")

	ch, err := q.Run(context.Background(), s.store)
	c.Assert(err, IsNil)
	output := []*oproto.ValueStream{}
	for stream := range ch {
		output = append(output, stream)
	}

	c.Check(output[0].Value[0].DoubleValue, Equals, float64((20*1+40*1)/2))
	c.Check(output[0].Value[1].DoubleValue, Equals, float64((20*2+40*2)/2))
	c.Check(output[0].Value[2].DoubleValue, Equals, float64((20*3+40*3)/2))
	c.Check(output[0].Value[3].DoubleValue, Equals, float64((20*4+40*4)/2))
	c.Check(output[0].Value[4].DoubleValue, Equals, float64((20*5+40*5)/2))
	c.Check(output[0].Value[5].DoubleValue, Equals, float64((20*6+40*6)/2))
	c.Check(output[0].Value[6].DoubleValue, Equals, float64((20*7+40*7)/2))
	c.Check(output[0].Value[7].DoubleValue, Equals, float64((20*8+40*8)/2))
	c.Check(output[0].Value[8].DoubleValue, Equals, float64((20*9+40*9)/2))
	c.Check(output[0].Value[9].DoubleValue, Equals, float64((20*10+40*10)/2))
	c.Check(output[0].Value[10].DoubleValue, Equals, float64((20*11+40*11)/2))
}

func (s *MySuite) TestRatio(c *C) {
	ctx, cancel := context.WithCancel(context.Background())
	e := NewExporter(ctx, s.Client, 10*time.Second)
	r := NewRatio(e, variable.NewFromString("/test/ratio"))

	for i := 0; i < 10; i++ {
		r.Success()
	}

	for i := 0; i < 5; i++ {
		r.Failure()
	}

	// Force export
	streams := e.GetStreams()
	c.Assert(len(streams), Equals, 3)
	for _, stream := range streams {
		switch variable.ProtoToString(stream.Variable) {
		case "/test/ratio-success":
			c.Check(stream.Value[0].DoubleValue, Equals, 10.0)
		case "/test/ratio-failure":
			c.Check(stream.Value[0].DoubleValue, Equals, 5.0)
		case "/test/ratio-total":
			c.Check(stream.Value[0].DoubleValue, Equals, 15.0)
		default:
			fmt.Printf("Invalid variable %s", variable.ProtoToString(stream.Variable))
			c.Fail()
		}
	}
	cancel()
	<-ctx.Done()
}

func (s *MySuite) TestTimer(c *C) {
	ctx, cancel := context.WithCancel(context.Background())
	e := NewExporter(ctx, s.Client, 10*time.Second)
	t := NewTimer(e, variable.NewFromString("/test/timer"))

	t.Start()
	time.Sleep(10 * time.Millisecond)
	t.Stop()

	t.Start()
	time.Sleep(10 * time.Millisecond)
	t.Stop()

	// Force export
	streams := e.GetStreams()
	c.Assert(len(streams), Equals, 2)
	for _, stream := range streams {
		switch variable.ProtoToString(stream.Variable) {
		case "/test/timer-total-count":
			c.Check((stream.Value[0].DoubleValue >= 20.0 && stream.Value[0].DoubleValue <= 25.0), Equals, true)
		case "/test/timer-overall-sum":
			c.Check(stream.Value[0].DoubleValue, Equals, 2.0)
		default:
			fmt.Printf("Invalid variable %s", variable.ProtoToString(stream.Variable))
			c.Fail()
		}
	}
	cancel()
	<-ctx.Done()
}

func (s *MySuite) TestAggregationOfMutations(c *C) {
	q, err := Parse("mean by (host) (rate(/test{host=a}[1200:1500], /test{host=b}[1200:1500]))")
	c.Assert(err, IsNil)
	query := q.query
	c.Check(query.Aggregation[0].Type, Equals, oproto.StreamAggregation_MEAN)
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Type, Equals, oproto.StreamMutation_RATE)
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[0]), Equals, "/test{host=a}[1200:1500]")
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[1]), Equals, "/test{host=b}[1200:1500]")
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[0].MinTimestamp, Equals, int64(1200))
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[0].MaxTimestamp, Equals, int64(1500))
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[1].MinTimestamp, Equals, int64(1200))
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[1].MaxTimestamp, Equals, int64(1500))
}

func (s *MySuite) TestAggregationOfPercentile(c *C) {
	q, err := Parse("percentile(90) by (host) (rate(/test{host=a}[1200:1500], /test{host=b}[1200:1500]))")
	c.Assert(err, IsNil)
	query := q.query
	c.Check(query.Aggregation[0].Type, Equals, oproto.StreamAggregation_PERCENTILE)
	c.Check(query.Aggregation[0].Param, Equals, 90.0)
	c.Check(query.Aggregation[0].Label[0], Equals, "host")
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[0]), Equals, "/test{host=a}[1200:1500]")
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[1]), Equals, "/test{host=b}[1200:1500]")
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[0].MinTimestamp, Equals, int64(1200))
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[0].MaxTimestamp, Equals, int64(1500))
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[1].MinTimestamp, Equals, int64(1200))
	c.Check(query.Aggregation[0].Query[0].Mutation[0].Query.Variable[1].MaxTimestamp, Equals, int64(1500))
}

// AddStream adds a new stream to the unlogged streams list.
// The stream is not flushed to disk until block.Flush() is called (which happens regularly).
func (block *Block) AddStream(stream *oproto.ValueStream) {
	block.newStreamsLock.Lock()
	defer block.newStreamsLock.Unlock()
	v := variable.ProtoToString(stream.Variable)
	for _, existingstream := range block.NewStreams {
		if variable.ProtoToString(existingstream.Variable) == v {
			existingstream.Value = append(existingstream.Value, stream.Value...)
			block.Block.UnloggedValues += uint32(len(stream.Value))
			return
		}
	}
	block.NewStreams = append(block.NewStreams, stream)
	block.Block.UnloggedValues += uint32(len(stream.Value))
	block.Block.UnloggedStreams++
}

func (s *MySuite) TestGetStreamForVariable(c *C) {
	block := NewBlock(context.Background(), "/test/foo", "", s.dataDir)
	for v := 0; v < 10; v++ {
		varName := fmt.Sprintf("/test/bar%d", v)
		block.LogStreams[varName] = &oproto.ValueStream{
			Variable: &oproto.StreamVariable{Name: varName},
			Value:    []*oproto.Value{},
		}
		for i := 0; i < 100; i++ {
			block.LogStreams[varName].Value = append(block.LogStreams[varName].Value,
				&oproto.Value{DoubleValue: float64(i)})
		}
	}
	c.Assert(block.Compact(context.Background()), IsNil)
	found := false
	for _, index := range block.Block.Header.Index {
		cv := variable.NewFromProto(index.Variable)
		if cv.String() != "/test/bar7" {
			continue
		}
		stream := block.getIndexedStream(context.Background(), index)
		c.Assert(variable.ProtoToString(stream.Variable), Equals, "/test/bar7")
		found = true
		break
	}
	c.Assert(found, Equals, true)
}

func (block *Block) RunLengthEncodeStreams(ctx context.Context, streams map[string]*oproto.ValueStream) map[string]*oproto.ValueStream {
	// Run-length encode all streams in parallel
	var sl sync.Mutex
	var outputValues int
	wg := &sync.WaitGroup{}
	newStreams := make(map[string]*oproto.ValueStream, 0)
	for _, stream := range streams {
		wg.Add(1)
		go func(stream *oproto.ValueStream) {
			defer wg.Done()
			// Sort values by timestamp
			value.By(func(a, b *oproto.Value) bool { return a.Timestamp < b.Timestamp }).Sort(stream.Value)

			// Run-length encode values
			stream = rle.Encode(stream)
			sl.Lock()
			newStreams[variable.ProtoToString(stream.Variable)] = stream
			outputValues += len(stream.Value)
			sl.Unlock()
		}(stream)
	}
	wg.Wait()

	openinstrument.Logf(ctx, "Run-length encoded %d streams to %d", len(newStreams), outputValues)

	return newStreams
}

func (s *MySuite) TestMutation(c *C) {
	q, err := Parse("rate(/test{host=a})")
	c.Assert(err, IsNil)
	query := q.query
	c.Check(query.Mutation[0].Type, Equals, oproto.StreamMutation_RATE)
	c.Check(variable.ProtoToString(query.Mutation[0].Query.Variable[0]), Equals, "/test{host=a}")

	ch, err := q.Run(context.Background(), s.store)
	c.Assert(err, IsNil)
	numStreams := 0
	for stream := range ch {
		c.Check(variable.ProtoToString(stream.Variable), Equals, "/test{host=a}")
		c.Check(len(stream.Value), Equals, 10)
		numStreams++
	}
	c.Check(numStreams, Equals, 1)
}

func (s *MySuite) TestVariableNoLabels(c *C) {
	q, err := Parse("/test{}")
	c.Assert(err, IsNil)
	query := q.query
	c.Check(variable.ProtoToString(query.Variable[0]), Equals, "/test")
	c.Check(query.Variable[0].MinTimestamp, Equals, int64(0))
	c.Check(query.Variable[0].MaxTimestamp, Equals, int64(0))

	ch, err := q.Run(context.Background(), s.store)
	c.Assert(err, IsNil)
	numStreams := 0
	for stream := range ch {
		c.Check(variable.ProtoToString(stream.Variable), Equals, "/test")
		c.Check(len(stream.Value), Equals, 11)
		numStreams++
	}
	c.Check(numStreams, Equals, 1)
}

func (s *MySuite) TestPercentile(c *C) {
	q, err := Parse("percentile(20) by (host) (/test{host=a})")
	c.Assert(err, IsNil)
	query := q.query
	c.Check(variable.ProtoToString(query.Aggregation[0].Query[0].Variable[0]), Equals, "/test{host=a}")
	c.Check(query.Aggregation[0].Type, Equals, oproto.StreamAggregation_PERCENTILE)
	c.Check(query.Aggregation[0].Param, Equals, 20.0)
	c.Check(query.Aggregation[0].Label[0], Equals, "host")
}

func (block *Block) AddStreams(c <-chan *oproto.ValueStream) {
	block.newStreamsLock.Lock()
	defer block.newStreamsLock.Unlock()
CHAN:
	for stream := range c {
		v := variable.ProtoToString(stream.Variable)

		for _, existingstream := range block.NewStreams {
			if variable.ProtoToString(existingstream.Variable) == v {
				existingstream.Value = append(existingstream.Value, stream.Value...)
				block.Block.UnloggedValues += uint32(len(stream.Value))
				continue CHAN
			}
		}

		block.NewStreams = append(block.NewStreams, stream)
		block.Block.UnloggedValues += uint32(len(stream.Value))
		block.Block.UnloggedStreams++
	}
}

func (s *MySuite) TestFloat(c *C) {
	ctx, cancel := context.WithCancel(context.Background())
	e := NewExporter(ctx, s.Client, 10*time.Second)
	f := NewFloat(e, variable.NewFromString("/test/float"))
	f.Set(100.0)

	// Force export
	streams := e.GetStreams()
	c.Assert(len(streams), Equals, 1)
	c.Check(variable.ProtoToString(streams[0].Variable), Equals, "/test/float")
	c.Check(streams[0].Value[0].DoubleValue, Equals, 100.0)
	cancel()
	<-ctx.Done()
}

// Writer builds a channel that can accept ValueStreams for writing to the datastore.
// Any ValueStreams written to this channel will eventually be flushed to disk,
// but they will be immediately available for use.
// The writes to disk are not guaranteed until Flush is called.
func (ds *Datastore) Writer(ctx context.Context) chan<- *oproto.ValueStream {
	in := make(chan *oproto.ValueStream, 10)
	go func() {
		for stream := range in {
			// Write this stream
			varName := variable.ProtoToString(stream.Variable)
			if block := ds.findBlock(ctx, varName); block != nil {
				//openinstrument.Logf(ctx, "Writing stream for variable %s to block %s", varName, block.ID())
				block.AddStream(stream)
			} else {
				openinstrument.Logf(ctx, "Unable to find block to write variable %s", varName)
			}
		}
	}()
	return in
}