最简单的 Service Fabric 可靠集合（字典）示例

Question

我正在尝试实施 Azure 的 Service Fabric Reliable Collection 的最简单用法 --- 一个 Hello World 示例，因为它是 ---一个 IReliableDictionary.

In this link an example is given. Yet this example requires a StateManager object, which I'm unsure how to create or even what it is. It seems an Actor 是必需的，我希望暂时避免使用 Actors。

谁能举个例子？

非常感谢

Answer 1

没关系，我找到了答案。

关键是无法在无状态服务中创建可靠的集合，我们必须创建一个有状态服务，如果我们想利用 Reliable Collections。

Here 我找到了一个 Reliable Dictionary 的实现示例。接下来我粘贴代码，它应该放在 MyStatefulService.cs class:

protected override async Task RunAsync(CancellationToken cancellationToken)
{

var myDictionary = await this.StateManager.GetOrAddAsync<IReliableDictionary<string, long>>("myDictionary");

while (true)
{
    cancellationToken.ThrowIfCancellationRequested();

    using (var tx = this.StateManager.CreateTransaction())
    {
        var result = await myDictionary.TryGetValueAsync(tx, "Counter");

        ServiceEventSource.Current.ServiceMessage(this, "Current Counter Value: {0}",
            result.HasValue ? result.Value.ToString() : "Value does not exist.");

        await myDictionary.AddOrUpdateAsync(tx, "Counter", 0, (key, value) => ++value);

        // If an exception is thrown before calling CommitAsync, the transaction aborts, all changes are
        // discarded, and nothing is saved to the secondary replicas.
        await tx.CommitAsync();
    }

    await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);
}

最简单的 Service Fabric 可靠集合（字典）示例

Simplest Service Fabric Reliable Collection (Dictionary) example

azure

azure-service-fabric