public async Task TestStorageConcurrence(Type storageProviderType)
{
IStorageProvider store;
switch (storageProviderType.Name)
{
case nameof(BlobStorageProvider):
var blobServiceClient = new BlobServiceClient("UseDevelopmentStorage=true");
var container = blobServiceClient.GetBlobContainerClient("globalcache");
await container.CreateIfNotExistsAsync();
store = new BlobStorageProvider(container);
break;
case nameof(FileStorageProvider):
store = new FileStorageProvider();
break;
default:
throw new NotSupportedException($"{nameof(storageProviderType)} is not supported");
}
var id = new CacheId("concurrence", 1);
var str = "hello world" + Guid.NewGuid();
var writes = 0;
await store.RemoveAsync(id);
await Task.WhenAll(new []
{
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
store.RemoveAsync(id),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
store.RemoveAsync(id),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
store.RemoveAsync(id),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
GetOrCreateAsync().ContinueWith(task => Assert.Equal(str, task.Result)),
});
// await store.RemoveAsync(id);
async Task <string> GetOrCreateAsync()
{
var retries = new RetryHelper(1, 500, totalMaxDelay: TimeSpan.FromSeconds(60));
do
{
if (await store.TryOpenRead(id) is Stream readStream)
{
using (readStream)
{
using var sr = new StreamReader(readStream);
return(await sr.ReadToEndAsync());
}
}
if (await store.TryOpenWrite(id) is StreamWithCompletion writeStream)
{
using (writeStream)
{
// !!!!Expensive data generation here!!!!
await writeStream.WriteAsync(Encoding.Default.GetBytes(str !));
Interlocked.Increment(ref writes);
// !!!!
}
await writeStream;
return(str !);
}
if (await retries.DelayAsync().ConfigureAwait(false) == false)
{
throw new TimeoutException();
}
}while (true);
}
}