Add metrics support (with only minimum basic features)

README.md

@@ -1,13 +1,14 @@
 # otel-tui
 
-🚧 This project is under construction 🚧
-
 A terminal OpenTelemetry viewer inspired by [otel-desktop-viewer](https://github.com/CtrlSpice/otel-desktop-viewer/tree/main)
 
 Traces
 ![Traces](./docs/traces.png)
 ![Spans](./docs/spans.png)
 
+Metrics
+![Metrics](./docs/metrics.png)
+
 Logs
 ![Logs](./docs/logs.png)
 
@@ -97,7 +98,21 @@ There're a lot of things to do. Here are some of them:
   - [x] Show trace information
   - [ ] ...
 - Metrics
-  - [ ] Display metrics
+  - [x] Metric stream
+    - [x] Display metric stream
+    - [x] Filter metrics
+    - [x] Show metric information
+    - [ ] Display basic chart of the selected metric
+      - [x] Gauge
+      - [x] Sum
+      - [ ] Histogram
+      - [ ] ExponentialHistogram
+      - [ ] Summary
+  - [ ] Metric list
+    - [ ] Display metric stream
+    - [ ] Flexible chart (query, selectable dimensions, etc.)
+  - [ ] Auto refresh chart
+  - [ ] Asynchronous chart rendering
   - [ ] ...
 - Logs
   - [x] Display logs

go.mod

@@ -56,6 +56,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/mostynb/go-grpc-compression v1.2.3 // indirect
+	github.com/navidys/tvxwidgets v0.6.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
 	github.com/prometheus/client_golang v1.19.1 // indirect

go.sum

@@ -104,6 +104,8 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/mostynb/go-grpc-compression v1.2.3 h1:42/BKWMy0KEJGSdWvzqIyOZ95YcR9mLPqKctH7Uo//I=
 github.com/mostynb/go-grpc-compression v1.2.3/go.mod h1:AghIxF3P57umzqM9yz795+y1Vjs47Km/Y2FE6ouQ7Lg=
+github.com/navidys/tvxwidgets v0.6.0 h1:ARIXGfx4aURHMhq+LW5vIoCCDx1X/PdTF8AcUq+nWZ0=
+github.com/navidys/tvxwidgets v0.6.0/go.mod h1:wd6aS2OzjZczFbg8GCaVuwkFcY1eixlT/y7Lc/YIwlg=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c h1:ncq/mPwQF4JjgDlrVEn3C11VoGHZN7m8qihwgMEtzYw=

go.work.sum

@@ -132,17 +132,21 @@ github.com/go-kit/log v0.2.1/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBj
 github.com/go-latex/latex v0.0.0-20231108140139-5c1ce85aa4ea/go.mod h1:Y7Vld91/HRbTBm7JwoI7HejdDB0u+e9AUBO9MB7yuZk=
 github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
 github.com/go-pdf/fpdf v0.9.0/go.mod h1:oO8N111TkmKb9D7VvWGLvLJlaZUQVPM+6V42pp3iV4Y=
+github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
 github.com/goccmack/gocc v0.0.0-20230228185258-2292f9e40198/go.mod h1:DTh/Y2+NbnOVVoypCCQrovMPDKUGp4yZpSbWg5D0XIM=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/golang/glog v1.2.0/go.mod h1:6AhwSGph0fcJtXVM/PEHPqZlFeoLxhs7/t5UDAwmO+w=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/jezek/xgb v1.1.1/go.mod h1:nrhwO0FX/enq75I7Y7G8iN1ubpSGZEiA3v9e9GyRFlk=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
+github.com/onsi/ginkgo/v2 v2.16.0/go.mod h1:llBI3WDLL9Z6taip6f33H76YcWtJv+7R3HigUjbIBOs=
+github.com/onsi/gomega v1.31.1/go.mod h1:y40C95dwAD1Nz36SsEnxvfFe8FFfNxzI5eJ0EYGyAy0=
 github.com/pierrec/lz4/v4 v4.1.21/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=

main.go

@@ -74,6 +74,10 @@ service:
       receivers: [otlp]
       processors: []
       exporters: [tui]
+    metrics:
+      receivers: [otlp]
+      processors: []
+      exporters: [tui]
 `
 
 			configProviderSettings := otelcol.ConfigProviderSettings{

tuiexporter/exporter.go

@@ -8,6 +8,7 @@ import (
 	"github.com/ymtdzzz/otel-tui/tuiexporter/internal/tui"
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.opentelemetry.io/collector/pdata/ptrace"
 )
 
@@ -27,6 +28,12 @@ func (e *tuiExporter) pushTraces(_ context.Context, traces ptrace.Traces) error
 	return nil
 }
 
+func (e *tuiExporter) pushMetrics(_ context.Context, metrics pmetric.Metrics) error {
+	e.app.Store().AddMetric(&metrics)
+
+	return nil
+}
+
 func (e *tuiExporter) pushLogs(_ context.Context, logs plog.Logs) error {
 	e.app.Store().AddLog(&logs)
 

tuiexporter/factory.go

@@ -19,7 +19,7 @@ func NewFactory() exporter.Factory {
 		component.MustNewType("tui"),
 		createDefaultConfig,
 		exporter.WithTraces(createTraces, stability),
-		//exporter.WithMetrics(createMetrics, stability),
+		exporter.WithMetrics(createMetrics, stability),
 		exporter.WithLogs(createLogs, stability),
 	)
 }
@@ -49,6 +49,27 @@ func createTraces(ctx context.Context, set exporter.Settings, cfg component.Conf
 	)
 }
 
+func createMetrics(ctx context.Context, set exporter.Settings, cfg component.Config) (exporter.Metrics, error) {
+	oCfg := cfg.(*Config)
+
+	e, err := exporters.LoadOrStore(
+		oCfg,
+		func() (*tuiExporter, error) {
+			return newTuiExporter(oCfg), nil
+		},
+		&set.TelemetrySettings,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return exporterhelper.NewMetricsExporter(ctx, set, oCfg,
+		e.Unwrap().pushMetrics,
+		exporterhelper.WithStart(e.Start),
+		exporterhelper.WithShutdown(e.Shutdown),
+	)
+}
+
 func createLogs(ctx context.Context, set exporter.Settings, cfg component.Config) (exporter.Logs, error) {
 	oCfg := cfg.(*Config)
 

tuiexporter/internal/telemetry/cache.go

@@ -12,10 +12,6 @@ type TraceSpanDataMap map[string][]*SpanData
 // This is used to quickly look up all spans in a trace for a service
 type TraceServiceSpanDataMap map[string]map[string][]*SpanData
 
-// TraceLogDataMap is a map of trace id to a slice of logs
-// This is used to quickly look up all logs in a trace
-type TraceLogDataMap map[string][]*LogData
-
 // TraceCache is a cache of trace spans
 type TraceCache struct {
 	spanid2span    SpanDataMap
@@ -103,6 +99,10 @@ func (c *TraceCache) flush() {
 	c.tracesvc2spans = TraceServiceSpanDataMap{}
 }
 
+// TraceLogDataMap is a map of trace id to a slice of logs
+// This is used to quickly look up all logs in a trace
+type TraceLogDataMap map[string][]*LogData
+
 // LogCache is a cache of logs
 type LogCache struct {
 	traceid2logs TraceLogDataMap
@@ -149,3 +149,71 @@ func (c *LogCache) GetLogsByTraceID(traceID string) ([]*LogData, bool) {
 func (c *LogCache) flush() {
 	c.traceid2logs = TraceLogDataMap{}
 }
+
+// MetricServiceMetricDataMap is a map of service name and metric name to a slice of metrics
+// This is used to quickly look up datapoints in a service metric
+type MetricServiceMetricDataMap map[string]map[string][]*MetricData
+
+// MetricCache is a cache of metrics
+type MetricCache struct {
+	svcmetric2metrics MetricServiceMetricDataMap
+}
+
+// NewMetricCache returns a new metric cache
+func NewMetricCache() *MetricCache {
+	return &MetricCache{
+		svcmetric2metrics: MetricServiceMetricDataMap{},
+	}
+}
+
+// UpdateCache updates the cache with a new metric
+func (c *MetricCache) UpdateCache(sname string, data *MetricData) {
+	mname := data.Metric.Name()
+	if sms, ok := c.svcmetric2metrics[sname]; ok {
+		if _, ok := sms[mname]; ok {
+			c.svcmetric2metrics[sname][mname] = append(c.svcmetric2metrics[sname][mname], data)
+		} else {
+			c.svcmetric2metrics[sname][mname] = []*MetricData{data}
+		}
+	} else {
+		c.svcmetric2metrics[sname] = map[string][]*MetricData{mname: {data}}
+	}
+}
+
+// DeleteCache deletes a list of metrics from the cache
+func (c *MetricCache) DeleteCache(metrics []*MetricData) {
+	for _, m := range metrics {
+		sname := "N/A"
+		if snameattr, ok := m.ResourceMetric.Resource().Attributes().Get("service.name"); ok {
+			sname = snameattr.AsString()
+		}
+		mname := m.Metric.Name()
+		if _, ok := c.svcmetric2metrics[sname][mname]; ok {
+			for i, metric := range c.svcmetric2metrics[sname][mname] {
+				if metric == m {
+					c.svcmetric2metrics[sname][mname] = append(c.svcmetric2metrics[sname][mname][:i], c.svcmetric2metrics[sname][mname][i+1:]...)
+					if len(c.svcmetric2metrics[sname][mname]) == 0 {
+						delete(c.svcmetric2metrics[sname], mname)
+						if len(c.svcmetric2metrics[sname]) == 0 {
+							delete(c.svcmetric2metrics, sname)
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+// GetMetricsBySvcAndMetricName returns all metrics for a given service name and metric name
+func (c *MetricCache) GetMetricsBySvcAndMetricName(sname, mname string) ([]*MetricData, bool) {
+	if sms, ok := c.svcmetric2metrics[sname]; ok {
+		if ms, ok := sms[mname]; ok {
+			return ms, ok
+		}
+	}
+	return nil, false
+}
+
+func (c *MetricCache) flush() {
+	c.svcmetric2metrics = MetricServiceMetricDataMap{}
+}

tuiexporter/internal/telemetry/cache_test.go

@@ -151,3 +151,47 @@ func TestGetLogsByTraceID(t *testing.T) {
 		})
 	}
 }
+
+func TestGetMetricsBySvcAndMetricName(t *testing.T) {
+	c := NewMetricCache()
+	metrics := []*MetricData{}
+	c.svcmetric2metrics["sname"] = map[string][]*MetricData{"mname": metrics}
+
+	tests := []struct {
+		name     string
+		sname    string
+		mname    string
+		wantdata []*MetricData
+		wantok   bool
+	}{
+		{
+			name:     "service and metrics exists",
+			sname:    "sname",
+			mname:    "mname",
+			wantdata: metrics,
+			wantok:   true,
+		},
+		{
+			name:     "service exists but metrics does not",
+			sname:    "sname",
+			mname:    "non-existent-metric",
+			wantdata: nil,
+			wantok:   false,
+		},
+		{
+			name:     "service does not exist",
+			sname:    "non-existent-sname",
+			mname:    "mname",
+			wantdata: nil,
+			wantok:   false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotdata, gotok := c.GetMetricsBySvcAndMetricName(tt.sname, tt.mname)
+			assert.Equal(t, tt.wantdata, gotdata)
+			assert.Equal(t, tt.wantok, gotok)
+		})
+	}
+}