Realm中的異步操作-Xamarin

Question

我在Xamarin中學習Realm。

我想通過使用Thread插入一些示例數據。我不會遇到任何問題，直到我在多個線程中調用相同的函數。領域文檔說要在executeTransactionAsync內執行插入操作，但我沒有在Realm-Xamarin中看到任何類似的方法。

這是代碼。

Thread thread1 = new Thread(() => TestThread.CountTo10("Thread 1")); 
thread1.Start(); 

Thread thread2 = new Thread(() => TestThread.CountTo10("Thread 2")); 
thread2.Start(); 

Thread類：

public class TestThread 
{ 
    public static Realm realm; 
    public static void CountTo10(string _threadName) 
    { 
     realm = Realm.GetInstance(); 
     for (int i = 0; i < 5; i++) 
     { 
      realm.Write(() => 
      { 
       RandomNumber random = new RandomNumber(); 
       System.Console.WriteLine("Iteration: " + i.ToString() + " Random No: " + random.number.ToString() + " from " + _threadName); 
       realm.Manage(random); 
      }); 

      Thread.Sleep(500); 
     } 
    } 
} 

境界對象：

public class RandomNumber : RealmObject 
{ 
    public int number { get; set; } 

    public RandomNumber() 
    { 
     number = (new Random()).Next(); 
    } 
} 

Answer 1

的問題是，你的realm變量爲static，而這最終將導致非法線程訪問。只是刪除static，你會好起來：

public class TestThread 
{ 
    public void CountTo10(string _threadName) 
    { 
     Realm realm = Realm.GetInstance(); 
     for (int i = 0; i < 5; i++) 
     { 
      realm.Write(() => 
      { 
       RandomNumber random = new RandomNumber(); 
       System.Console.WriteLine("Iteration: " + i.ToString() + " Random No: " + random.number.ToString() + " from " + _threadName); 
       realm.Manage(random); 
      }); 

      Thread.Sleep(500); 
     } 
     // no need to call `Realm.close()` in Realm-Xamarin, that closes ALL instances. 
     // Realm instance auto-closes after this line 
    } 
}