Major optimizations and improvements

Author: MGSousa

.github/workflows/release.yml

@@ -0,0 +1,39 @@
+name: Release prom-exporter
+
+on:
+  push:
+    branches-ignore:
+      - '**'
+    tags:
+      - 'v*.*.*'
+
+permissions:
+  contents: write
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@master
+        with:
+          go-version: 1.21.x
+
+      - name: Prepare
+        id: prepare
+        run: echo "tag_name=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+        
+      - name: Release
+        uses: goreleaser/goreleaser-action@v5
+        with:
+          version: latest
+          args: release --clean --timeout=5m
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VERSION: ${{ steps.prepare.outputs.tag_name }}

.goreleaser.yml

@@ -14,5 +14,7 @@ builds:
       - -s -w
 archives:
   - format: binary
+checksum:
+  disable: true
 snapshot:
   name_template: "{{ .Tag }}-next"

exporter/builders.go

@@ -0,0 +1,105 @@
+package exporter
+
+import (
+	"fmt"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var (
+	fqname string
+	labels prometheus.Labels = nil
+)
+
+func (e *Exporter) build(m []string, k int) (string, prometheus.Labels) {
+	metricSlices := split(m[0], "_")
+
+	if len(metricSlices) == 1 {
+		fqname, labels = e.buildShortMetrics(m, k, metricSlices[0])
+	} else if len(metricSlices) >= 2 {
+		fqname, labels = e.buildLongMetrics(m, metricSlices, k)
+	}
+
+	return fqname, labels
+}
+
+func (e *Exporter) buildShortMetrics(m []string, k int, part string) (string, prometheus.Labels) {
+	labels = nil
+
+	if k < (len(e.data) - 1) {
+		future := split(e.data[k+1], RAW_METRIC_DELIM)
+		if m[0] == future[0] {
+			fqname = prometheus.BuildFQName(e.name, "", part)
+			labels = prometheus.Labels{"metric": m[1]}
+
+		} else {
+			if k == 0 {
+				fqname = prometheus.BuildFQName(e.name, part, m[1])
+
+			} else {
+				future = split(e.data[k-1], RAW_METRIC_DELIM)
+				if m[0] == future[0] {
+					fqname = prometheus.BuildFQName(e.name, "", part)
+					labels = prometheus.Labels{"metric": m[1]}
+
+				} else {
+					fqname = prometheus.BuildFQName(e.name, part, m[1])
+				}
+			}
+		}
+	} else if k == (len(e.data) - 1) {
+		future := split(e.data[k-1], RAW_METRIC_DELIM)
+		if m[0] == future[0] {
+			fqname = prometheus.BuildFQName(e.name, "", part)
+			labels = prometheus.Labels{"metric": m[1]}
+
+		} else {
+			fqname = prometheus.BuildFQName(e.name, part, m[1])
+		}
+	} else {
+		fqname = prometheus.BuildFQName(e.name, part, m[1])
+	}
+
+	return fqname, labels
+}
+
+func (e *Exporter) buildLongMetrics(m, slices []string, k int) (string, prometheus.Labels) {
+	labels = nil
+
+	if k < (len(e.data) - 1) {
+		future := split(e.data[k+1], RAW_METRIC_DELIM)
+		if m[0] == future[0] {
+			fqname = prometheus.BuildFQName(
+				e.name, fmt.Sprintf("%s", join(slices[0:len(slices)-1], "_")), slices[len(slices)-1])
+			labels = prometheus.Labels{"metric": m[1]}
+
+		} else {
+			if k == 0 {
+				fqname = prometheus.BuildFQName(e.name, fmt.Sprintf("%s", join(slices[0:], "_")), m[1])
+
+			} else {
+				future := split(e.data[k-1], RAW_METRIC_DELIM)
+				if m[0] == future[0] {
+					fqname = prometheus.BuildFQName(
+						e.name, fmt.Sprintf("%s", join(slices[0:len(slices)-1], "_")), slices[len(slices)-1])
+					labels = prometheus.Labels{"metric": m[1]}
+
+				} else {
+					fqname = prometheus.BuildFQName(e.name, fmt.Sprintf("%s", join(slices[0:], "_")), m[1])
+				}
+			}
+		}
+	} else if k == (len(e.data) - 1) {
+		future := split(e.data[k-1], RAW_METRIC_DELIM)
+		if m[0] == future[0] {
+			fqname = prometheus.BuildFQName(
+				e.name, fmt.Sprintf("%s", join(slices[0:len(slices)-1], "_")), slices[len(slices)-1])
+			labels = prometheus.Labels{"metric": m[1]}
+
+		} else {
+			fqname = prometheus.BuildFQName(e.name, fmt.Sprintf("%s", join(slices[0:], "_")), m[1])
+		}
+	}
+
+	return fqname, labels
+}

exporter/constants.go

@@ -0,0 +1,12 @@
+package exporter
+
+const (
+	// HELP describe for service metric [service_up]
+	SERVICE_UP_HELP = "Target Up"
+
+	// key to be injected on aggregated metric
+	METRIC_STRING = "metric"
+
+	// delimiter for raw data extracted from remote service
+	RAW_METRIC_DELIM = "::"
+)