Implement memory only database to test configapi

internal/configapi/configapi.go

@@ -2,6 +2,7 @@ package configapi
 
 import (
 	"github.com/creekorful/trandoshan/internal/configapi/api"
+	"github.com/creekorful/trandoshan/internal/configapi/database"
 	"github.com/creekorful/trandoshan/internal/configapi/service"
 	"github.com/creekorful/trandoshan/internal/event"
 	"github.com/creekorful/trandoshan/internal/logging"
@@ -42,7 +43,7 @@ func execute(ctx *cli.Context) error {
 	}
 
 	// Create the ConfigAPI service
-	s, err := service.NewService(nil, pub)
+	s, err := service.NewService(&database.MemoryDatabase{}, pub)
 
 	state := state{
 		api: s,

internal/configapi/database/memory.go

@@ -0,0 +1,26 @@
+package database
+
+import "sync"
+
+// MemoryDatabase is an memory only database structure
+type MemoryDatabase struct {
+	values map[string][]byte
+	mutex  sync.Mutex
+}
+
+// Get value using his key
+func (md *MemoryDatabase) Get(key string) ([]byte, error) {
+	md.mutex.Lock()
+	defer md.mutex.Unlock()
+
+	return md.values[key], nil
+}
+
+// Set value for given key
+func (md *MemoryDatabase) Set(key string, value []byte) error {
+	md.mutex.Lock()
+	defer md.mutex.Unlock()
+
+	md.values[key] = value
+	return nil
+}