v 1.0.7. Boost the performance of getting mvbScope.

api/build.gradle

@@ -66,7 +66,7 @@ tasks.withType(KotlinCompile).configureEach{
 // publish
 mavenPublishing {
     def artifactId = "mvb-android"
-    def version = "1.0.6"
+    def version = "1.0.7"
     def isSnapshot = false
 
     if (isSnapshot) version += "-SNAPSHOT"

api/src/androidTest/java/pers/shawxingkwok/mvb/Scope.kt

@@ -0,0 +1,50 @@
+package pers.shawxingkwok.mvb
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.testing.launchFragment
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.lifecycleScope
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import org.junit.Test
+import org.junit.runner.RunWith
+import pers.shawxingkwok.mvb.android.mvbScope
+import java.util.concurrent.CopyOnWriteArrayList
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+internal class Scope {
+
+    @Test
+    fun useAppContext() {
+        launchFragment<MyFragment>()
+    }
+
+    class MyViewModel : ViewModel(){}
+
+    class MyFragment : Fragment(){
+        val scopes = CopyOnWriteArrayList<CoroutineScope>()
+
+        override fun onCreate(savedInstanceState: Bundle?) {
+            super.onCreate(savedInstanceState)
+            repeat(10){
+                lifecycleScope.launch(Dispatchers.Default) {
+                    scopes += mvbScope
+                }
+            }
+        }
+
+        override fun onDestroy() {
+            super.onDestroy()
+            assert(scopes.size == 10)
+            scopes.single()
+        }
+    }
+}

api/src/main/java/pers/shawxingkwok/mvb/android/MVBViewModel.kt

@@ -2,13 +2,9 @@ package pers.shawxingkwok.mvb.android
 
 import androidx.lifecycle.SavedStateHandle
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import java.util.concurrent.ConcurrentHashMap
 
 internal class MVBViewModel(val state: SavedStateHandle) : ViewModel() {
-    // viewModelScope is not thread-safe.
-    val scope by lazy{ viewModelScope }
-
     // keeps data from `rmb`
     val map = ConcurrentHashMap<String, Container>()
 }

api/src/main/java/pers/shawxingkwok/mvb/android/mvbScope.kt

@@ -1,9 +1,10 @@
 package pers.shawxingkwok.mvb.android
 
 import androidx.lifecycle.ViewModelStoreOwner
+import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.CoroutineScope
 
 /**
  * See [doc](https://shawxingkwok.github.io/ITWorks/docs/multiplatform/mvb/android/#mvbscope).
  */
-public val ViewModelStoreOwner.mvbScope: CoroutineScope get() = getMVBVm().scope
+public val ViewModelStoreOwner.mvbScope: CoroutineScope get() = getMVBVm().viewModelScope

demo/build/kotlin/compileDebugKotlin/cacheable/caches-jvm/lookups/counters.tab

@@ -1,2 +1,2 @@
-7
+9
 0