1 files changed, 41 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/prometheus/cache.go b/src/go/collectors/go.d.plugin/modules/prometheus/cache.go
new file mode 100644
index 000000000..7fc34f8c6
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/prometheus/cache.go
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package prometheus
+
+import (
+	"github.com/netdata/netdata/go/go.d.plugin/agent/module"
+)
+
+func newCache() *cache {
+	return &cache{entries: make(map[string]*cacheEntry)}
+}
+
+type (
+	cache struct {
+		entries map[string]*cacheEntry
+	}
+
+	cacheEntry struct {
+		seen         bool
+		notSeenTimes int
+		charts       []*module.Chart
+	}
+)
+
+func (c *cache) hasP(key string) bool {
+	v, ok := c.entries[key]
+	if !ok {
+		v = &cacheEntry{}
+		c.entries[key] = v
+	}
+	v.seen = true
+	v.notSeenTimes = 0
+
+	return ok
+}
+
+func (c *cache) addChart(key string, chart *module.Chart) {
+	if v, ok := c.entries[key]; ok {
+		v.charts = append(v.charts, chart)
+	}
+}