public static void CreatePromiseTest()
{
ConnectionMultiplexer redis = ConnectionMultiplexer.Connect("localhost");
var m = new MemoryQueue();
int taskCount = 100;
ITask[] tasks = new ITask[taskCount];
PromiseTaskResultHandle <int>[] handles = new PromiseTaskResultHandle <int> [taskCount];
for (int i = 0; i < taskCount; i++)
{
var add = new AddTask(new (i, i + 1));
tasks[i] = add;
var client = RedisPromiseClientFactory.GetInstance(redis);
var promise = client.CreatePromise();
add.BindPromise(promise);
var handle = new PromiseTaskResultHandle <int>(add, promise, (o) => Console.WriteLine($"result is ready: {o}"));
//now promise will be ready to resolve
client.Listen(promise);
m.Enqueue(add.Serialize());
handles[i] = handle;
}
var resolver = new RedisPromiseServer(redis);
// this is simulating many workers are resolving promises. (executing tasks in this context)
Parallel.ForEach(handles, ((handle) =>
{
var task = new DefaultTaskDeserializer().Deserialize((string)m.Dequeue());
task.Execute();
var res = task.SerializeResult();
// thanks to BindPromise each task's instance id is also id of its related promise. So we can directly resolve related promise by using it.
resolver.Resolve(task.GetInstanceIdentifier(), res);
}));
for (int i = 0; i < taskCount; i++)
{
int correctResult = i + i + 1;
while (!handles[i].IsResolved())
{
// it might not come from redis yet
Thread.Sleep(10);
}
var calculatedResult = (int)handles[i].GetObjectResult();
if (correctResult != calculatedResult)
{
throw new Exception("wrong result");
}
}
Console.WriteLine("ParallelTest is Successful");
Thread.Sleep(1000);
}
/// <summary>
/// OUTDATED: binds task and handle directly and starts to listen which means it should be used after task is enqueued.
/// If this is used with a task which is not enqueued then it will use resources for a promise which cannot be resolved.
/// </summary>
/// <param name="task"></param>
/// <param name="redis"></param>
/// <param name="onResolve"></param>
public PromiseTaskResultHandle(ITask task, ConnectionMultiplexer redis, Action <TResult> onResolve = null, bool listenImmediately = false)
{
// this ctor binds promise and tasks itself
var promiseClient = RedisPromiseClientFactory.GetInstance(redis);
var promise = promiseClient.CreatePromise();
promise.OnResolve = (o =>
{
string message = (string)o;
TResult res = JsonConvert.DeserializeObject <TResult>(message);
_onResolve(res);
});
_promise = promise;
_task = task;
//TODO: use listenImmediately;
}
public static RedisPromiseClient GetInstance(ConnectionMultiplexer redis)
{
return(RedisPromiseClientFactory.GetInstance(redis));
}
