public QueueMessage ReadNextFrom(string queueName)
{
using (var connection = Connections.ConnectToInitializedQueue(queueName))
{
return(ReadMessage(connection, Locks.TakeQueueLock(queueName)));
}
}
public void Report(QueueFailure request)
{
var recoveryAction = HandleFailure(new FailureDescriptor
{
PathToDbFile = Connections.PathToDbFile(Connections.QueuesDir, request.Name),
DbLock = Locks.TakeQueueLock(request.Name),
CooperatorAddress = request.Cooperator,
RecoveryCategory = "queues",
DbName = request.Name
});
Propagators.ScheduleQueueOperation(request.Name, recoveryAction);
}
public void Delete(DeleteQueue request)
{
var queueLock = Locks.TakeQueueLock(request.QueueName);
lock (queueLock)
{
if (Locks.QueuesRecoveryLocks.ContainsKey(request.QueueName))
{
throw new Exception($"Queue {request.QueueName} is inconsistent");
}
Connections.RemoveQueue(request.QueueName);
Monitor.PulseAll(queueLock);
Propagators.ScheduleQueueOperation(request.QueueName, () => Propagate(request));
Locks.RemoveQueueLock(request.QueueName);
}
}
public void Create(CreateMessage request)
{
var queueLock = Locks.TakeQueueLock(request.QueueName);
lock (queueLock)
{
if (Locks.QueuesRecoveryLocks.ContainsKey(request.QueueName))
{
throw new Exception($"Queue {request.QueueName} is inconsistent");
}
using (var connection = Connections.ConnectToInitializedQueue(request.QueueName))
{
Create(connection, request);
Monitor.PulseAll(queueLock);
}
}
}
public void Create(CreateQueue request)
{
var queueLock = Locks.TakeQueueLock(request.Name);
lock (queueLock)
{
if (Locks.QueuesRecoveryLocks.ContainsKey(request.Name))
{
throw new Exception($"Queue {request.Name} is inconsistent");
}
CreateQueueFile(request.Name);
if (!string.IsNullOrEmpty(request.Cooperator))
{
Propagators.ScheduleQueueOperation(request.Name, () => PropagateRequestToCo(request));
}
}
}
public void Delete(DeleteMessage request)
{
var queueLock = Locks.TakeQueueLock(request.QueueName);
lock (queueLock)
{
if (Locks.QueuesRecoveryLocks.ContainsKey(request.QueueName))
{
throw new Exception($"Queue {request.QueueName} is inconsistent");
}
using (var connection = Connections.ConnectToInitializedQueue(request.QueueName))
{
if (IsDeleteDecisionImposedByCooperator(request))
{
ForceDelete(connection, request);
}
else
{
TryDelete(connection, request);
}
}
}
}
