Code cleanup

server/collection.go

@@ -4,14 +4,13 @@ import "sync"
 
 type Collection struct {
 	items []*Server
-	mutex *sync.Mutex
+	sync.RWMutex
 }
 
 // Create a new collection from a slice of servers.
 func NewCollection(servers []*Server) *Collection {
 	return &Collection{
 		items: servers,
-		mutex: &sync.Mutex{},
 	}
 }
 
@@ -22,16 +21,15 @@ func (c *Collection) All() []*Server {
 
 // Adds an item to the collection store.
 func (c *Collection) Add(s *Server) {
-	c.mutex.Lock()
-	defer c.mutex.Unlock()
-
+	c.Lock()
 	c.items = append(c.items, s)
+	c.Unlock()
 }
 
 // Returns only those items matching the filter criteria.
 func (c *Collection) Filter(filter func(*Server) bool) []*Server {
-	c.mutex.Lock()
-	defer c.mutex.Unlock()
+	c.RLock()
+	defer c.RUnlock()
 
 	r := make([]*Server, 0)
 	for _, v := range c.items {
@@ -46,6 +44,9 @@ func (c *Collection) Filter(filter func(*Server) bool) []*Server {
 // Returns a single element from the collection matching the filter. If nothing is
 // found a nil result is returned.
 func (c *Collection) Find(filter func(*Server) bool) *Server {
+	c.RLock()
+	defer c.RUnlock()
+
 	for _, v := range c.items {
 		if filter(v) {
 			return v
@@ -57,8 +58,8 @@ func (c *Collection) Find(filter func(*Server) bool) *Server {
 
 // Removes all items from the collection that match the filter function.
 func (c *Collection) Remove(filter func(*Server) bool) {
-	c.mutex.Lock()
-	defer c.mutex.Unlock()
+	c.Lock()
+	defer c.Unlock()
 
 	r := make([]*Server, 0)
 	for _, v := range c.items {

server/configuration.go

@@ -1,31 +0,0 @@
-package server
-
-import (
-	"github.com/pkg/errors"
-	"gopkg.in/yaml.v2"
-	"os"
-)
-
-// Writes the server configuration to the disk. The saved configuration will be returned
-// back to the calling function to use if desired.
-func (s *Server) WriteConfigurationToDisk() ([]byte, error) {
-	s.mutex.Lock()
-	defer s.mutex.Unlock()
-
-	f, err := os.Create("data/servers/" + s.Uuid + ".yml")
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-	defer f.Close()
-
-	b, err := yaml.Marshal(&s)
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	if _, err := f.Write(b); err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	return b, nil
-}

server/server.go

@@ -72,7 +72,7 @@ type Server struct {
 
 	// Internal mutex used to block actions that need to occur sequentially, such as
 	// writing the configuration to the disk.
-	mutex *sync.Mutex
+	sync.RWMutex
 }
 
 // The build settings for a given server that impact docker container creation and
@@ -139,14 +139,9 @@ type Allocations struct {
 	Mappings map[string][]int `json:"mappings"`
 }
 
-// Initializes the default required internal struct components for a Server.
-func (s *Server) Init() {
-	s.mutex = &sync.Mutex{}
-}
-
 // Iterates over a given directory and loads all of the servers listed before returning
 // them to the calling function.
-func LoadDirectory(dir string, cfg *config.SystemConfiguration) error {
+func LoadDirectory() error {
 	// We could theoretically use a standard wait group here, however doing
 	// that introduces the potential to crash the program due to too many
 	// open files. This wouldn't happen on a small setup, but once the daemon is
@@ -179,7 +174,7 @@ func LoadDirectory(dir string, cfg *config.SystemConfiguration) error {
 		go func(uuid string, data *api.ServerConfigurationResponse) {
 			defer wg.Done()
 
-			s, err := FromConfiguration(data, cfg)
+			s, err := FromConfiguration(data)
 			if err != nil {
 				zap.S().Errorw("failed to load server, skipping...", zap.String("server", uuid), zap.Error(err))
 				return
@@ -204,15 +199,13 @@ func LoadDirectory(dir string, cfg *config.SystemConfiguration) error {
 // Initializes a server using a data byte array. This will be marshaled into the
 // given struct using a YAML marshaler. This will also configure the given environment
 // for a server.
-func FromConfiguration(data *api.ServerConfigurationResponse, cfg *config.SystemConfiguration) (*Server, error) {
+func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
 	s := new(Server)
 
 	if err := defaults.Set(s); err != nil {
 		return nil, err
 	}
 
-	s.Init()
-
 	if err := s.UpdateDataStructure(data.Settings, false); err != nil {
 		return nil, err
 	}
@@ -231,7 +224,7 @@ func FromConfiguration(data *api.ServerConfigurationResponse, cfg *config.System
 		Server: s,
 	}
 	s.Filesystem = Filesystem{
-		Configuration: cfg,
+		Configuration: &config.Get().System,
 		Server:        s,
 	}
 	s.Resources = ResourceUsage{}