static void Main(string[] args)
{
// Loading Configuration
LogSetup.InitializeLog("Apple_Store_Recorder.log", "info");
_logger = LogManager.GetCurrentClassLogger();
// Loading Config
_logger.Info("Loading Configurations from App.config");
LoadConfiguration();
// Initializing Queue
_logger.Info("Initializing Queue");
AWSSQSHelper appsDataQueue = new AWSSQSHelper(_appsDataQueueName, _maxMessagesPerDequeue, _awsKey, _awsKeySecret);
AWSSQSHelper backup = new AWSSQSHelper("DeadLetter", _maxMessagesPerDequeue, _awsKey, _awsKeySecret);
// Creating MongoDB Instance
_logger.Info("Loading MongoDB / Creating Instances");
MongoDBWrapper mongoDB = new MongoDBWrapper();
string serverAddr = String.Join(":", Consts.MONGO_SERVER, Consts.MONGO_PORT);
mongoDB.ConfigureDatabase(Consts.MONGO_USER, Consts.MONGO_PASS, Consts.MONGO_AUTH_DB, serverAddr, 10000, Consts.MONGO_DATABASE, Consts.MONGO_COLLECTION);
// Setting Error Flag to No Error ( 0 )
System.Environment.ExitCode = 0;
// Initialiazing Control Variables
int fallbackWaitTime = 1;
// Buffer of Messages to be recorder
List <AppleStoreAppModel> recordsBuffer = new List <AppleStoreAppModel> ();
List <Message> messagesBuffer = new List <Message> ();
// Insert Batch Size
int batchSize = 1000;
_logger.Info("Started Recording App Data");
do
{
try
{
// Dequeueing messages from the Queue
if (!appsDataQueue.DeQueueMessages())
{
Thread.Sleep(_hiccupTime); // Hiccup
continue;
}
// Checking for no message received, and false positives situations
if (!appsDataQueue.AnyMessageReceived())
{
// If no message was found, increases the wait time
int waitTime;
if (fallbackWaitTime <= 12)
{
// Exponential increase on the wait time, truncated after 12 retries
waitTime = Convert.ToInt32(Math.Pow(2, fallbackWaitTime) * 1000);
}
else // Reseting Wait after 12 fallbacks
{
waitTime = 2000;
fallbackWaitTime = 0;
}
fallbackWaitTime++;
// Sleeping before next try
Console.WriteLine("Fallback (seconds) => " + waitTime);
Thread.Sleep(waitTime);
continue;
}
// Reseting fallback time
fallbackWaitTime = 1;
// Iterating over dequeued Messages
foreach (var appDataMessage in appsDataQueue.GetDequeuedMessages())
{
try
{
// Deserializing message
var appData = AppleStoreAppModel.FromJson(appDataMessage.Body);
// Dumping "Url" to "_id"
appData._id = appData.url;
// Adding it to the buffer of records to be recorded
recordsBuffer.Add(appData);
// Adding message to the buffer of messages to be deleted
messagesBuffer.Add(appDataMessage);
// Is it time to batch insert ?
if ((recordsBuffer.Count % batchSize) == 0)
{
// Batch Insertion
mongoDB.BatchInsert <AppleStoreAppModel> (recordsBuffer);
// Logging Feedback
_logger.Info("\tApps Recorded : " + recordsBuffer.Count);
// Deleting Messages
messagesBuffer.ForEach((msg) => appsDataQueue.DeleteMessage(msg));
_logger.Info("\tMessages Deleted: " + messagesBuffer.Count);
// Clearing Buffers
recordsBuffer.Clear();
messagesBuffer.Clear();
}
}
catch (Exception ex)
{
_logger.Error(ex);
}
finally
{
// Deleting the message
appsDataQueue.DeleteMessage(appDataMessage);
backup.EnqueueMessage(appDataMessage.Body);
}
}
}
catch (Exception ex)
{
_logger.Error(ex);
}
} while (true);
}
static void Main (string[] args)
{
// Loading Configuration
LogSetup.InitializeLog ("Apple_Store_Recorder.log", "info");
_logger = LogManager.GetCurrentClassLogger ();
// Loading Config
_logger.Info ("Loading Configurations from App.config");
LoadConfiguration ();
// Initializing Queue
_logger.Info ("Initializing Queue");
AWSSQSHelper appsDataQueue = new AWSSQSHelper (_appsDataQueueName, _maxMessagesPerDequeue, _awsKey, _awsKeySecret);
// Creating MongoDB Instance
_logger.Info ("Loading MongoDB / Creating Instances");
MongoDBWrapper mongoDB = new MongoDBWrapper ();
string serverAddr = String.Join (":", Consts.MONGO_SERVER, Consts.MONGO_PORT);
mongoDB.ConfigureDatabase (Consts.MONGO_USER, Consts.MONGO_PASS, Consts.MONGO_AUTH_DB, serverAddr, 10000, Consts.MONGO_DATABASE, Consts.MONGO_COLLECTION);
// Setting Error Flag to No Error ( 0 )
System.Environment.ExitCode = 0;
// Initialiazing Control Variables
int fallbackWaitTime = 1;
// Buffer of Messages to be recorder
List<AppleStoreAppModel> recordsBuffer = new List<AppleStoreAppModel> ();
List<Message> messagesBuffer = new List<Message> ();
// Insert Batch Size
int batchSize = 1000;
_logger.Info ("Started Recording App Data");
do
{
try
{
// Dequeueing messages from the Queue
if (!appsDataQueue.DeQueueMessages ())
{
Thread.Sleep (_hiccupTime); // Hiccup
continue;
}
// Checking for no message received, and false positives situations
if (!appsDataQueue.AnyMessageReceived ())
{
// If no message was found, increases the wait time
int waitTime;
if (fallbackWaitTime <= 12)
{
// Exponential increase on the wait time, truncated after 12 retries
waitTime = Convert.ToInt32 (Math.Pow (2, fallbackWaitTime) * 1000);
}
else // Reseting Wait after 12 fallbacks
{
waitTime = 2000;
fallbackWaitTime = 0;
}
fallbackWaitTime++;
// Sleeping before next try
Console.WriteLine ("Fallback (seconds) => " + waitTime);
Thread.Sleep (waitTime);
continue;
}
// Reseting fallback time
fallbackWaitTime = 1;
// Iterating over dequeued Messages
foreach (var appDataMessage in appsDataQueue.GetDequeuedMessages ())
{
try
{
// Deserializing message
var appData = AppleStoreAppModel.FromJson (appDataMessage.Body);
// Dumping "Url" to "_id"
appData._id = appData.url;
// Adding it to the buffer of records to be recorded
recordsBuffer.Add (appData);
// Adding message to the buffer of messages to be deleted
messagesBuffer.Add (appDataMessage);
// Is it time to batch insert ?
if ((recordsBuffer.Count % batchSize) == 0)
{
// Batch Insertion
mongoDB.BatchInsert<AppleStoreAppModel> (recordsBuffer);
// Logging Feedback
_logger.Info ("\tApps Recorded : " + recordsBuffer.Count);
// Deleting Messages
messagesBuffer.ForEach ( (msg) => appsDataQueue.DeleteMessage (msg));
_logger.Info ("\tMessages Deleted: " + messagesBuffer.Count);
// Clearing Buffers
recordsBuffer.Clear ();
messagesBuffer.Clear ();
}
}
catch (Exception ex)
{
_logger.Error (ex);
}
finally
{
// Deleting the message
appsDataQueue.DeleteMessage (appDataMessage);
}
}
}
catch (Exception ex)
{
_logger.Error (ex);
}
} while (true);
}