Async init

android/build.gradle

@@ -37,7 +37,7 @@ android {
         disable 'InvalidPackage'
     }
     dependencies {
-        implementation 'com.optimizely.ab:android-sdk:3.7.0'
+        implementation 'com.optimizely.ab:android-sdk:3.8.0'
         implementation 'com.noveogroup.android:android-logger:1.3.6'
     }
 }

android/src/main/kotlin/com/policygenius/optimizely_plugin/OptimizelyPlugin.kt

@@ -2,10 +2,8 @@ package com.policygenius.optimizely_plugin
 
 import android.app.Activity
 import androidx.annotation.NonNull
-import com.noveogroup.android.log.Log
 import com.optimizely.ab.android.sdk.OptimizelyClient
 import com.optimizely.ab.android.sdk.OptimizelyManager
-import com.optimizely.ab.optimizelyjson.OptimizelyJSON
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.embedding.engine.plugins.activity.ActivityAware
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
@@ -14,7 +12,7 @@ import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler
 import io.flutter.plugin.common.MethodChannel.Result
 import io.flutter.plugin.common.PluginRegistry.Registrar
-import java.io.Console
+
 
 /** OptimizelyPlugin */
 class OptimizelyPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
@@ -57,6 +55,11 @@ class OptimizelyPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
         initOptimizelyManager(sdkKey!!, dataFile!!)
         result.success("")
       }
+      "initOptimizelyManagerAsync" -> {
+        val sdkKey = call.argument<String>("sdk_key")
+        initOptimizelyManagerAsync(sdkKey!!)
+        result.success("")
+      }
       "isFeatureEnabled" -> {
         val featureKey = call.argument<String>("feature_key")
         val userId = call.argument<String>("user_id")
@@ -66,7 +69,7 @@ class OptimizelyPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
       "getAllFeatureVariables" -> {
         val featureKey = call.argument<String>("feature_key")
         val userId = call.argument<String>("user_id")
-        val attributes = call.argument<MutableMap<String,Any>>("attributes")
+        val attributes = call.argument<MutableMap<String, Any>>("attributes")
         val variables = getAllFeatureVariables(featureKey!!, userId!!, attributes!!)
         result.success(variables)
       }
@@ -107,6 +110,21 @@ class OptimizelyPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
     optimizelyClient = optimizelyManager.initialize(activity.applicationContext, dataFile, true, true)
   }
 
+  private fun initOptimizelyManagerAsync(sdkKey: String) {
+    val builder = OptimizelyManager.builder()
+    // In Android, the minimum polling interval is 60 seconds. In iOS, the minimum polling
+    // interval is 2 minutes while the app is open. If you specify shorter polling intervals
+    // than these minimums, the SDK will automatically reset the intervals to 60 seconds (Android)
+    // or 2 minutes (iOS).
+    val optimizelyManager = builder.withDatafileDownloadInterval(60)
+            .withSDKKey(sdkKey)
+            .build(activity.applicationContext)
+
+    optimizelyManager.initialize(activity.applicationContext, null) {
+      client -> optimizelyClient = client
+    }
+  }
+
   private fun isFeatureEnabled(featureKey: String, userId: String): Boolean{
     val flag = optimizelyClient.isFeatureEnabled(featureKey, userId)
 

example/lib/main.dart

@@ -21,7 +21,7 @@ class _MyAppState extends State<MyApp> {
   @override
   void initState() {
     super.initState();
-    setupOptimizely();
+    setupOptimizelyAsync();
   }
 
   void setupOptimizely() async {
@@ -35,6 +35,12 @@ class _MyAppState extends State<MyApp> {
     );
   }
 
+  void setupOptimizelyAsync() async {
+    await optimizelyPlugin.initOptimizelyManagerAsync(
+      'your_optimizely_sdk_key',
+    );
+  }
+
   // Platform messages are asynchronous, so we initialize in an async method.
   Future<void> getPriceFilterFlag() async {
     String priceFilterFlag;

ios/Classes/SwiftOptimizelyPlugin.swift

@@ -1,6 +1,11 @@
 import Flutter
 import Optimizely
 
+enum InitResult {
+  case success
+  case failure(Error)
+}
+
 public class SwiftOptimizelyPlugin: NSObject, FlutterPlugin {
 
     typealias GetFeatureItems = (featureKey: String, userId: String, attributes: OptimizelyAttributes?)
@@ -34,12 +39,35 @@ public class SwiftOptimizelyPlugin: NSObject, FlutterPlugin {
                     sdkKey: sdkKey,
                     periodicDownloadInterval: 60
                 )
+
                 try startClient(client, dataFile: dataFile)
                 self.client = client
+
                 result(nil)
             } catch {
-                result(error)
+              result(error.localizedDescription)
+            }
+        case "initOptimizelyManagerAsync":
+          do {
+            let sdkKey: String = try arguments.argument(for: "sdk_key")
+            let client = OptimizelyClient(
+              sdkKey: sdkKey,
+              periodicDownloadInterval: 60
+            )
+
+            try startClient(client) { initResult in
+              switch initResult {
+                case .failure(let error):
+                  result(error.localizedDescription)
+                case .success:
+                  result(nil)
+              }
             }
+
+            self.client = client
+          } catch {
+            result(error.localizedDescription)
+          }
         case "isFeatureEnabled":
             do {
                 let client = try ensureClient()
@@ -51,7 +79,7 @@ public class SwiftOptimizelyPlugin: NSObject, FlutterPlugin {
                 )
                 result(enabled)
             } catch {
-                result(error)
+              result(error.localizedDescription)
             }
         case "getAllFeatureVariables":
             do {
@@ -64,7 +92,7 @@ public class SwiftOptimizelyPlugin: NSObject, FlutterPlugin {
                 )
                 result(json.toMap())
             } catch {
-                result(error)
+              result(error.localizedDescription)
             }
         default:
             result(FlutterMethodNotImplemented)
@@ -89,7 +117,18 @@ public class SwiftOptimizelyPlugin: NSObject, FlutterPlugin {
             client.start()
         }
     }
-
+
+  func startClient(_ client: OptimizelyClient, completion: @escaping (InitResult) -> Void) throws {
+      client.start { clientResult in
+        switch clientResult {
+          case .failure(let error):
+            completion(.failure(error))
+          case .success(_):
+            completion(.success)
+          }
+      }
+    }
+
     func getFeatureItems(from arguments: [String: Any]) throws -> GetFeatureItems {
         let featureKey: String = try arguments.argument(for: "feature_key")
         let userId: String = try arguments.argument(for: "user_id")

ios/optimizely_plugin.podspec

@@ -15,7 +15,7 @@ Flutter plugin for optimizely SDK
   s.source           = { :path => '.' }
   s.source_files = 'Classes/**/*'
   s.dependency 'Flutter'
-  s.dependency 'OptimizelySwiftSDK'
+  s.dependency 'OptimizelySwiftSDK', '~> 3.6.1'
   s.platform = :ios, '10.0'
 
   # Flutter.framework does not contain a i386 slice. Only x86_64 simulators are supported.

lib/optimizely_plugin.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+
 import 'package:flutter/services.dart';
 
 class OptimizelyPlugin {
@@ -17,6 +18,14 @@ class OptimizelyPlugin {
     });
   }
 
+  Future<void> initOptimizelyManagerAsync(
+    String sdkKey,
+  ) async {
+    await _channel.invokeMethod('initOptimizelyManagerAsync', <String, dynamic>{
+      'sdk_key': sdkKey,
+    });
+  }
+
   Future<bool> isFeatureEnabled(
     String featureKey,
     userID,