public static void CommandQueuePoller(CommandHandler service)
{
//Trace.WriteLine("LogPoller has started -- seeing if there's anything in the queue for me!!");
CloudQueueMessage msg = CommandQueue.GetMessage();
if (msg == null)
{
//Trace.TraceInformation("COMMAND QUEUE nothing found - going back to sleep");
}
while (msg != null)
{
string myMessage = msg.AsString;
Trace.TraceInformation("Got message {0}", myMessage);
//probably should do some checking here before deleting...
CommandQueue.DeleteMessage(msg);
//split the ID from the type -- first item is ID, second is type
string[] messageParts = myMessage.Split(new char[] { ':' }, StringSplitOptions.RemoveEmptyEntries);
if (messageParts.Length != 2)
{
Trace.TraceError("COMMAND QUEUE message improperly formed. {0}", myMessage);
continue;
}
CloudBlockBlob theBlob = CommandBlobContainer.GetBlockBlobReference(messageParts[0]);
Type commandType = Type.GetType(messageParts[1]);
CommandBase theCommand = null;
using (MemoryStream msBlob = new MemoryStream())
{
byte[] logBytes = theBlob.DownloadByteArray();
msBlob.Write(logBytes, 0, logBytes.Length);
BinaryFormatter bf = new BinaryFormatter();
msBlob.Position = 0;
object theObject = bf.Deserialize(msBlob);
theCommand = Convert.ChangeType(theObject, commandType) as CommandBase;
}
if (theCommand != null)
{
service.Handle(theCommand);
}
else
{
Trace.TraceInformation("COMMAND BLOB Could not deserialize message from queue id {0}", myMessage);
}
msg = CommandQueue.GetMessage();
}
}
private static void InitializeStorageResources(CloudStorageAccount storageAccount)
{
var blobStorage = storageAccount.CreateCloudBlobClient();
LogBlobContainer = blobStorage.GetContainerReference("logitems");
CommandBlobContainer = blobStorage.GetContainerReference("commands");
var queueStorage = storageAccount.CreateCloudQueueClient();
LogQueue = queueStorage.GetQueueReference("logmessages");
CommandQueue = queueStorage.GetQueueReference("commandmessages");
bool isStorageFinalized = false;
while (!isStorageFinalized)
{
try
{
LogBlobContainer.CreateIfNotExist();
LogQueue.CreateIfNotExist();
CommandBlobContainer.CreateIfNotExist();
CommandQueue.CreateIfNotExist();
isStorageFinalized = true;
}
catch (StorageClientException sce)
{
if (sce.ErrorCode == StorageErrorCode.TransportError)
{
Trace.TraceError("Storage services initialization failure. " +
"Check your storage account configuration settings. " +
"If running locally, ensure that the Development Storage service is running. " +
"Message: '{0}'", sce.Message);
}
else
{
throw sce;
}
}
}
}
