the quest for leaks is over.

Why a singleton doesn't leak, vs calling static methods on a class is beyond me

ZeroTier One/AppDelegate.swift

@@ -87,6 +87,7 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
         }
 
         monitor.updateNetworkInfo()
+        monitor.start()
     }
 
     func applicationWillTerminate(aNotification: NSNotification) {
@@ -243,10 +244,10 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
         let id = String(network.nwid, radix: 16)
 
         if network.connected {
-            ServiceCom.leaveNetwork(id)
+            ServiceCom.sharedInstance.leaveNetwork(id)
         }
         else {
-            ServiceCom.joinNetwork(id)
+            ServiceCom.sharedInstance.joinNetwork(id)
         }
     }
 
@@ -257,11 +258,10 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSMenuDelegate {
     }
 
     func menuWillOpen(menu: NSMenu) {
-        monitor.start()
+        //monitor.updateNetworkInfo()
     }
 
     func menuDidClose(menu: NSMenu) {
-        monitor.stop()
     }
 }
 

ZeroTier One/JoinNetworkViewController.swift

@@ -69,10 +69,10 @@ class JoinNetworkViewController: NSViewController, NSComboBoxDelegate, NSComboBo
     @IBAction func onJoinClicked(sender: AnyObject?) {
         let networkString = network.stringValue
 
-        ServiceCom.joinNetwork(networkString,
-                               allowManaged: allowManagedCheckBox.state == NSOnState,
-                               allowGlobal: allowGlobalCheckBox.state == NSOnState,
-                               allowDefault: allowDefaultCheckBox.state == NSOnState)
+        ServiceCom.sharedInstance.joinNetwork(networkString,
+                                              allowManaged: allowManagedCheckBox.state == NSOnState,
+                                              allowGlobal: allowGlobalCheckBox.state == NSOnState,
+                                              allowDefault: allowDefaultCheckBox.state == NSOnState)
         network.stringValue = ""
 
 

ZeroTier One/NetworkInfoCell.swift

@@ -56,14 +56,14 @@ class NetworkInfoCell: NSTableCellView {
     }
 
     func joinNetwork(nwid: String) {
-        ServiceCom.joinNetwork(nwid,
-                               allowManaged: allowManaged.state == NSOnState,
-                               allowGlobal: allowGlobal.state == NSOnState,
-                               allowDefault: !defaultRouteExists(parent.networkList) && (allowDefault.state == NSOnState))
+        ServiceCom.sharedInstance.joinNetwork(nwid,
+                                              allowManaged: allowManaged.state == NSOnState,
+                                              allowGlobal: allowGlobal.state == NSOnState,
+                                              allowDefault: !defaultRouteExists(parent.networkList) && (allowDefault.state == NSOnState))
     }
 
     func leaveNetwork(nwid: String) {
-        ServiceCom.leaveNetwork(nwid)
+        ServiceCom.sharedInstance.leaveNetwork(nwid)
     }
 
     @IBAction func onAllowStatusChanged(sender: NSButton) {

ZeroTier One/NetworkMonitor.swift

@@ -50,6 +50,7 @@ class NetworkMonitor: NSObject {
     }
 
     func updateNetworkInfo() {
+        //NSLog("updateNetworkInfo")
         let filePath = dataFile()
 
         if NSFileManager.defaultManager().fileExistsAtPath(filePath) {
@@ -62,7 +63,7 @@ class NetworkMonitor: NSObject {
             }
         }
 
-        ServiceCom.getNetworkList() { (networkList) -> Void in
+        ServiceCom.sharedInstance.getNetworkList() { (networkList) -> Void in
             self.receivedNetworks = networkList
 
             NSOperationQueue.mainQueue().addOperationWithBlock() { () -> Void in
@@ -70,7 +71,7 @@ class NetworkMonitor: NSObject {
             }
         }
 
-        ServiceCom.getNodeStatus() { nodeStatus -> Void in
+        ServiceCom.sharedInstance.getNodeStatus() { nodeStatus -> Void in
             NSOperationQueue.mainQueue().addOperationWithBlock() { () -> Void in
                 let nc = NSNotificationCenter.defaultCenter()
 

ZeroTier One/ServiceCom.swift

@@ -9,9 +9,17 @@
 import Cocoa
 
 class ServiceCom: NSObject {
-    static let baseURL = "http://localhost:9993"
+    static let sharedInstance = ServiceCom()
 
-    private static func getKey() -> String {
+    let baseURL = "http://localhost:9993"
+    let session = NSURLSession(configuration: NSURLSessionConfiguration.ephemeralSessionConfiguration())
+
+    private override init() {
+        super.init()
+    }
+
+
+    private func getKey() -> String {
         struct Holder {
             static var key: String? = nil
         }
@@ -77,16 +85,14 @@ class ServiceCom: NSObject {
         }
     }
 
-    static func getNetworkList(completionHandler: ([Network]) -> Void) {
+    func getNetworkList(completionHandler: ([Network]) -> Void) {
 
-        let urlString = baseURL + "/network?auth=\(ServiceCom.getKey())"
+        let urlString = baseURL + "/network?auth=\(getKey())"
 
         let url = NSURL(string: urlString)
 
         if let u = url {
-            let request = NSMutableURLRequest(URL: u)
-            let session = NSURLSession.sharedSession()
-            let task = session.dataTaskWithRequest(request) { (data, response, error) in
+            let task = session.dataTaskWithURL(u) { (data, response, error) in
                 if error != nil{
                     NSLog("\(error)")
                     return
@@ -118,13 +124,11 @@ class ServiceCom: NSObject {
         }
     }
 
-    static func getNodeStatus(completionHandler: (NodeStatus -> Void)) {
-        let urlString = baseURL + "/status?auth=\(ServiceCom.getKey())"
+    func getNodeStatus(completionHandler: (NodeStatus -> Void)) {
+        let urlString = baseURL + "/status?auth=\(getKey())"
 
         if let u = NSURL(string: urlString) {
-            let request = NSMutableURLRequest(URL: u)
-            let session = NSURLSession.sharedSession()
-            let task = session.dataTaskWithRequest(request) { (data, response, error) in
+            let task = session.dataTaskWithURL(u) { (data, response, error) in
                 if error != nil{
                     NSLog("\(error)")
                     return
@@ -153,8 +157,8 @@ class ServiceCom: NSObject {
         }
     }
 
-    static func joinNetwork(network: String, allowManaged: Bool = true, allowGlobal: Bool = false, allowDefault: Bool = false) {
-        let urlString = baseURL + "/network/\(network)?auth=\(ServiceCom.getKey())"
+    func joinNetwork(network: String, allowManaged: Bool = true, allowGlobal: Bool = false, allowDefault: Bool = false) {
+        let urlString = baseURL + "/network/\(network)?auth=\(getKey())"
         let url = NSURL(string: urlString)
 
         var jsonDict = [String: AnyObject]()
@@ -171,7 +175,6 @@ class ServiceCom: NSObject {
                 request.HTTPBody = json
                 request.setValue("application/json", forHTTPHeaderField: "Content-Type")
 
-                let session = NSURLSession.sharedSession()
                 let task = session.dataTaskWithRequest(request) { (data, response, error) in
                     let httpResponse = response as! NSHTTPURLResponse
                     let status = httpResponse.statusCode
@@ -193,14 +196,13 @@ class ServiceCom: NSObject {
 
     }
 
-    static func leaveNetwork(network: String) {
-        let urlString = baseURL + "/network/\(network)?auth=\(ServiceCom.getKey())"
+    func leaveNetwork(network: String) {
+        let urlString = baseURL + "/network/\(network)?auth=\(getKey())"
 
         if let u = NSURL(string: urlString) {
             let request = NSMutableURLRequest(URL: u)
             request.HTTPMethod = "DELETE"
 
-            let session = NSURLSession.sharedSession()
             let task = session.dataTaskWithRequest(request) { (data, response, error) in
                 let httpResponse = response as! NSHTTPURLResponse
                 let status = httpResponse.statusCode

ZeroTier One/ShowNetworksViewController.swift

@@ -35,8 +35,6 @@ class ShowNetworksViewController: NSViewController, NSTableViewDelegate, NSTable
     override func viewWillAppear() {
         super.viewWillAppear()
         visible = true
-
-        netMonitor.start()
     }
 
     override func viewWillDisappear() {
@@ -45,8 +43,6 @@ class ShowNetworksViewController: NSViewController, NSTableViewDelegate, NSTable
         let filePath = dataFile()
         NSKeyedArchiver.archiveRootObject(self.networkList, toFile: filePath)
         visible = false
-
-        netMonitor.stop()
     }
 
     func deleteNetworkFromList(nwid: String) {