static int Main(string[] args)
{
// If this flag is set during the processing of the file, the program will exit with an error code.
bool hasErrors = false;
try
{
// Defaults
batchSize = 100;
assemblyName = "External Service";
nameSpaceName = "MarkThree.Quasar.External";
// The command line parser is driven by different states that are triggered by the flags read. Unless a flag has been
// read, the command line parser assumes that it's reading the file name from the command line.
argumentState = ArgumentState.FileName;
// Parse the command line for arguments.
foreach (string argument in args)
{
// Decode the current argument into a state change (or some other action).
if (argument == "-a")
{
argumentState = ArgumentState.Assembly; continue;
}
if (argument == "-b")
{
argumentState = ArgumentState.BatchSize; continue;
}
if (argument == "-n")
{
argumentState = ArgumentState.NameSpace; continue;
}
if (argument == "-i")
{
argumentState = ArgumentState.FileName; continue;
}
// The parsing state will determine which variable is read next.
switch (argumentState)
{
case ArgumentState.Assembly:
assemblyName = argument;
break;
case ArgumentState.BatchSize:
batchSize = Convert.ToInt32(argument);
break;
case ArgumentState.FileName:
fileName = argument;
break;
case ArgumentState.NameSpace:
nameSpaceName = argument;
break;
}
// The default state is to look for the input file name on the command line.
argumentState = ArgumentState.FileName;
}
// Throw a usage message back at the user if no file name was given.
if (fileName == null)
{
throw new Exception("Usage: Loader.Algorithm -i <FileName>");
}
// Open up the file containing all the broker.
BrokerReader brokerReader = new BrokerReader(fileName);
// Loading the database involves creating a batch of commands and sending them off as a transaction. This gives
// the server a chance to pipeline a large chunk of processing, without completely locking up the server for the
// entire set of data. This will construct a header for the command batch which gives information about which
// assembly contains the class that is used to load the data.
Batch batch = new Batch();
TransactionPlan transactionPlan = batch.Transactions.Add();
AssemblyPlan assemblyPlan = batch.Assemblies.Add(assemblyName);
TypePlan typePlan = assemblyPlan.Types.Add(string.Format("{0}.{1}", nameSpaceName, "Broker"));
// Read the file until an EOF is reached.
while (true)
{
// This counter keeps track of the number of records sent. When the batch is full, it's sent to the server to be
// executed as a single transaction.
int batchCounter = 0;
// Read the next broker from the input stream. A 'null' is returned when we've read past the end of file.
Broker broker = brokerReader.ReadBroker();
if (broker != null)
{
// Create a new method from the type information and the name found in the XML file.
MethodPlan methodPlan = new MethodPlan("Load");
// Construct a call to the 'Load' method to populate the broker record.
methodPlan.Parameters.Add(new InputParameter("brokerId", broker.Symbol));
methodPlan.Parameters.Add(new InputParameter("name", broker.Name));
methodPlan.Parameters.Add(new InputParameter("symbol", broker.Symbol));
// Create a method from the XML data and add it to the transaction.
transactionPlan.Methods.Add(typePlan, methodPlan);
}
// This will check to see if it's time to send the batch. A batch is sent when the 'batchSize' has been
// reached, or if the last record has just been converted into a command.
if (++batchCounter % batchSize == 0 || broker == null)
{
WebTransactionProtocol.Execute(batch);
batch = new Batch();
transactionPlan = batch.Transactions.Add();
assemblyPlan = batch.Assemblies.Add(assemblyName);
typePlan = assemblyPlan.Types.Add(string.Format("{0}.{1}", nameSpaceName, "Broker"));
}
// If the end of file was reached, break out of the loop and exit the application.
if (broker == null)
{
break;
}
}
}
catch (BatchException batchException)
{
foreach (Exception exception in batchException.Exceptions)
{
Console.WriteLine(exception.Message);
}
hasErrors = true;
}
catch (Exception exception)
{
// Show the system error and exit with an error.
Console.WriteLine(exception.Message);
hasErrors = true;
}
// Any errors will cause an abnormal exit.
if (hasErrors)
{
return(1);
}
// Write a status message when a the file is loaded successfully.
Console.WriteLine(String.Format("{0} Data: Brokers, Loaded", DateTime.Now.ToString("u")));
// If we reached here, the file was imported without issue.
return(0);
}
static int Main(string[] args)
{
// If this flag is set during the processing of the file, the program will exit with an error code.
bool hasErrors = false;
try
{
// Defaults
batchSize = 100;
assemblyName = "Service.External";
nameSpaceName = "Shadows.WebService.External";
// The command line parser is driven by different states that are triggered by the flags read. Unless a flag has been
// read, the command line parser assumes that it's reading the file name from the command line.
argumentState = ArgumentState.FileName;
// Parse the command line for arguments.
foreach (string argument in args)
{
// Decode the current argument into a state change (or some other action).
if (argument == "-a")
{
argumentState = ArgumentState.Assembly; continue;
}
if (argument == "-b")
{
argumentState = ArgumentState.BatchSize; continue;
}
if (argument == "-n")
{
argumentState = ArgumentState.NameSpace; continue;
}
if (argument == "-i")
{
argumentState = ArgumentState.FileName; continue;
}
// The parsing state will determine which variable is read next.
switch (argumentState)
{
case ArgumentState.Assembly: assemblyName = argument; break;
case ArgumentState.BatchSize: batchSize = Convert.ToInt32(argument); break;
case ArgumentState.FileName: fileName = argument; break;
case ArgumentState.NameSpace: nameSpaceName = argument; break;
}
// The default state is to look for the input file name on the command line.
argumentState = ArgumentState.FileName;
}
// Throw a usage message back at the user if no file name was given.
if (fileName == null)
{
throw new Exception("Usage: Loader.Algorithm -i <FileName>");
}
// Open up the file containing all the broker.
BrokerReader brokerReader = new BrokerReader(fileName);
// Create a new web client that will serve as the connection point to the server.
WebClient webClient = new WebClient();
// Loading the database involves creating a batch of commands and sending them off as a transaction. This gives
// the server a chance to pipeline a large chunk of processing, without completely locking up the server for the
// entire set of data. This will construct a header for the command batch which gives information about which
// assembly contains the class that is used to load the data.
RemoteBatch remoteBatch = new RemoteBatch();
RemoteTransaction remoteTransaction = remoteBatch.Transactions.Add();
RemoteAssembly remoteAssembly = remoteBatch.Assemblies.Add(assemblyName);
RemoteType remoteType = remoteAssembly.Types.Add(string.Format("{0}.{1}", nameSpaceName, "Broker"));
// Read the file until an EOF is reached.
while (true)
{
// This counter keeps track of the number of records sent. When the batch is full, it's sent to the server to be
// executed as a single transaction.
int batchCounter = 0;
// Read the next broker from the input stream. A 'null' is returned when we've read past the end of file.
Broker broker = brokerReader.ReadBroker();
if (broker != null)
{
// Construct a call to the 'Load' method to populate the broker record.
RemoteMethod remoteMethod = remoteType.Methods.Add("Load");
remoteMethod.Transaction = remoteTransaction;
remoteMethod.Parameters.Add("brokerId", broker.Symbol);
remoteMethod.Parameters.Add("name", broker.Name);
remoteMethod.Parameters.Add("symbol", broker.Symbol);
}
// This will check to see if it's time to send the batch. A batch is sent when the 'batchSize' has been
// reached, or if the last record has just been converted into a command.
if (++batchCounter % batchSize == 0 || broker == null)
{
// Call the web services to execute the command batch.
remoteBatch.Merge(webClient.Execute(remoteBatch));
// Any error during the batch will terminate the execution of the remaining records in the data file.
if (remoteBatch.HasExceptions)
{
// Display each error on the console.
foreach (RemoteMethod remoteMethod in remoteBatch.Methods)
{
foreach (RemoteException remoteException in remoteMethod.Exceptions)
{
Console.WriteLine(String.Format("{0}: {1}", remoteMethod.Parameters["brokerId"].Value,
remoteException.Message));
}
}
// This will signal the error exit from this loader.
hasErrors = true;
}
// If the end of file was reached, break out of the loop and exit the application.
if (broker == null)
{
break;
}
// After each batch has been send, check to see if there are additional records to be send. If so,
// regenerate the remote batch and set up the header.
remoteBatch = new RemoteBatch();
remoteTransaction = remoteBatch.Transactions.Add();
remoteAssembly = remoteBatch.Assemblies.Add(assemblyName);
remoteType = remoteAssembly.Types.Add(string.Format("{0}.{1}", nameSpaceName, "Broker"));
}
}
}
catch (Exception exception)
{
// Show the system error and exit with an error.
Console.WriteLine(exception.Message);
hasErrors = true;
}
// Any errors will cause an abnormal exit.
if (hasErrors)
{
return(1);
}
// Write a status message when a the file is loaded successfully.
Console.WriteLine(String.Format("{0} Data: Brokers, Loaded", DateTime.Now.ToString("u")));
// If we reached here, the file was imported without issue.
return(0);
}
