Initial commit

checker/registry.go

@@ -0,0 +1,78 @@
+// Copyright 2020-2026 The happyDomain Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package checker
+
+import (
+	"log"
+)
+
+// checkerRegistry is the global registry for checker definitions.
+// Thread-safety: all writes happen during init() before any goroutines start.
+// After initialization, the map is read-only and safe for concurrent access.
+var checkerRegistry = map[string]*CheckerDefinition{}
+
+// observationProviderRegistry is the global registry for observation providers,
+// keyed by ObservationKey.
+var observationProviderRegistry = map[ObservationKey]ObservationProvider{}
+
+// RegisterChecker registers a checker definition globally.
+func RegisterChecker(c *CheckerDefinition) {
+	log.Println("Registering new checker:", c.ID)
+	c.BuildRulesInfo()
+	checkerRegistry[c.ID] = c
+}
+
+// RegisterExternalizableChecker registers a checker that supports being
+// delegated to a remote HTTP endpoint. It appends an "endpoint" AdminOpt
+// so the administrator can optionally configure a remote URL.
+// When the endpoint is left empty, the checker runs locally as usual.
+func RegisterExternalizableChecker(c *CheckerDefinition) {
+	c.Options.AdminOpts = append(c.Options.AdminOpts,
+		CheckerOptionDocumentation{
+			Id:          "endpoint",
+			Type:        "string",
+			Label:       "Remote checker endpoint URL",
+			Description: "If set, delegate observation collection to this HTTP endpoint instead of running locally.",
+			Placeholder: "http://checker-" + c.ID + ":8080",
+			NoOverride:  true,
+		},
+	)
+	RegisterChecker(c)
+}
+
+// RegisterObservationProvider registers an observation provider globally.
+func RegisterObservationProvider(p ObservationProvider) {
+	observationProviderRegistry[p.Key()] = p
+}
+
+// GetCheckers returns all registered checker definitions.
+func GetCheckers() map[string]*CheckerDefinition {
+	return checkerRegistry
+}
+
+// FindChecker returns the checker definition with the given ID, or nil.
+func FindChecker(id string) *CheckerDefinition {
+	return checkerRegistry[id]
+}
+
+// GetObservationProviders returns all registered observation providers.
+func GetObservationProviders() map[ObservationKey]ObservationProvider {
+	return observationProviderRegistry
+}
+
+// FindObservationProvider returns the observation provider for the given key, or nil.
+func FindObservationProvider(key ObservationKey) ObservationProvider {
+	return observationProviderRegistry[key]
+}