private async Task ProcessQueueItemsAsync()
{
await this.controlQueueLock.WaitAsync();
IDatabase database = this.redisConnection.GetDatabase();
RedisValue[] messagesJson = await database.ListRangeAsync(this.partitionControlQueueKey);
foreach (string messageJson in messagesJson)
{
TaskMessage taskMessage = RedisSerializer.DeserializeObject <TaskMessage>(messageJson);
string instanceId = taskMessage.OrchestrationInstance.InstanceId;
string orchestrationStateKey = RedisKeyNameResolver.GetOrchestrationRuntimeStateHashKey(this.taskHub, this.partition);
string orchestrationInstanceQueueKey = RedisKeyNameResolver.GetOrchestrationQueueKey(this.taskHub, this.partition, instanceId);
// Enter empty runtime state if it is an execution start event
if (taskMessage.Event is ExecutionStartedEvent startedEvent)
{
OrchestrationRuntimeState emptyState = GetEmptyState(taskMessage);
await database.HashSetAsync(orchestrationStateKey, instanceId, RedisSerializer.SerializeObject(emptyState.Events), When.NotExists);
}
await database.ListRightPopLeftPushAsync(this.partitionControlQueueKey, orchestrationInstanceQueueKey);
this.activeOrchestrationLocks.TryAdd(instanceId, new SemaphoreSlim(1, 1));
}
//Release lock so another notification can be handled
this.controlQueueLock.Release();
}
private async Task <List <TaskMessage> > GetOrchestrationControlQueueMessages(string orchestrationId)
{
IDatabase redisDatabase = this.redisConnection.GetDatabase();
string orchestrationControlQueueKey = RedisKeyNameResolver.GetOrchestrationQueueKey(this.taskHub, this.partition, orchestrationId);
return((await redisDatabase.ListRangeAsync(orchestrationControlQueueKey))
.Select(json => RedisSerializer.DeserializeObject <TaskMessage>(json))
.ToList());
}
public RedisTransactionBuilder RemoveItemsFromOrchestrationQueue(string orchestrationId, int numberOfItemsToRemove)
{
if (this.partition == null)
{
throw new ArgumentNullException($"Cannot call {nameof(RemoveItemsFromOrchestrationQueue)} without a partition set.");
}
string orchestrationQueueKey = RedisKeyNameResolver.GetOrchestrationQueueKey(this.taskHub, this.partition, orchestrationId);
for (int i = 0; i < numberOfItemsToRemove; i++)
{
transaction.ListRightPopAsync(orchestrationQueueKey);
}
return(this);
}