feat: added basic scaffolding for host executor

backend/database/database.go

@@ -7,8 +7,8 @@ import (
 )
 
 type Database interface {
-	GetNodeStatus(hostname string) (*model.Node, error)
-	GetJobStatus(id int) (*model.Job, error)
+	GetNode(hostname string) (*model.Node, error)
+	GetJob(id string) (*model.Job, error)
 
 	AllNodes() ([]*model.Node, error)
 	AllJobs() ([]*model.Job, error)

backend/database/mem.go

@@ -5,6 +5,7 @@ import (
 
 	"git.phc.dm.unipi.it/phc/cluster-dashboard/backend/executor"
 	"git.phc.dm.unipi.it/phc/cluster-dashboard/backend/model"
+	"golang.org/x/exp/maps"
 )
 
 // simpleDB è una implementazione di [database.Database] che tiene giusto una cache in memoria e
@@ -17,10 +18,10 @@ type simpleDB struct {
 	lastUpdate *time.Time
 
 	// Nodes is a map from hostname to node info
-	nodes map[string]model.Node
+	nodes map[string]*model.Node
 
 	// Jobs is a map from job id to job info
-	jobs map[int]model.Job
+	jobs map[string]*model.Job
 
 	// The following are maps from hostname to a list of sampled temperatures, used memory, used storage space and network upload and download rate.
 
@@ -35,20 +36,20 @@ func NewSimpleDatabase(ex executor.Service) Database {
 	return &simpleDB{Executor: ex}
 }
 
-func (s *simpleDB) GetNodeStatus(hostname string) (*model.Node, error) {
+func (s *simpleDB) GetNode(hostname string) (*model.Node, error) {
 	panic("todo")
 }
 
-func (s *simpleDB) GetJobStatus(id int) (*model.Job, error) {
+func (s *simpleDB) GetJob(id string) (*model.Job, error) {
 	panic("todo")
 }
 
 func (s *simpleDB) AllNodes() ([]*model.Node, error) {
-	panic("todo")
+	return maps.Values(s.nodes), nil
 }
 
 func (s *simpleDB) AllJobs() ([]*model.Job, error) {
-	panic("todo")
+	return maps.Values(s.jobs), nil
 }
 
 func (s *simpleDB) QueryTemperatureSamples(from, to time.Time) ([]model.Sample[float64], error) {