/// <summary>
/// Method for consuming and processing messages on the RabbitMQ queue.
/// </summary>
public void ConsumeMessage()
{
// Objects for working with Blaise data sets.
IDataLink4 dl_source = null;
IDatamodel dm_source = null;
IDataLink4 dl_dest_sql = null;
IDataLink dl_dest_file = null;
// Functionality to be performed when a message is received. (digestion)
consumer.Received += (model, ea) =>
{
// Extract the message and encode it.
var body = ea.Body;
var message = Encoding.UTF8.GetString(body);
log.Info("Message received - " + message);
MessageData data = null;
try
{
// Take the serialized JSON string and deserialize it into a MessageData object.
data = new JavaScriptSerializer().Deserialize <MessageData>(message);
// Connect to the Blaise source data set.
dl_source = GetDataLink(data.source_hostname, data.source_instrument, data.source_server_park);
dm_source = dl_source.Datamodel;
// Identify the primary key in the source data set.
var key = DataRecordManager.GetKey(dm_source, "PRIMARY");
// Assign the primary key the value of the 'serial_number' recieved from the RabbitMQ message.
key.Fields[0].DataValue.Assign(data.serial_number);
// Check if a case with this key exists in the source data set.
if (dl_source.KeyExists(key))
{
// Read in the case.
var case_record = dl_source.ReadRecord(key);
if (data.action == "delete")
{
dl_source.Delete(key);
SendStatus(MakeStatusJson(data, "Case Deleted"));
}
else
{
// Connect to the Blaise sql database destination data set if provided in payload.
if ((data.dest_hostname != "" && data.dest_hostname != null) && (data.dest_server_park != "" && data.dest_server_park != null))
{
dl_dest_sql = GetDataLink(data.dest_hostname, data.dest_instrument, data.dest_server_park);
// Copy or move the case from the source to destination based on the 'action' received from the message.
switch (data.action)
{
// Copy action received.
case "copy":
dl_dest_sql.Write(case_record);
if (!dl_dest_sql.KeyExists(key))
{
SendStatus(MakeStatusJson(data, "Error"));
log.Error(data.dest_instrument + " case " + data.serial_number + " NOT copied from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_server_park + "@" + data.dest_hostname + ".");
}
if (dl_dest_sql.KeyExists(key))
{
SendStatus(MakeStatusJson(data, "Case Copied"));
log.Info(data.dest_instrument + " case " + data.serial_number + " copied from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_server_park + "@" + data.dest_hostname + ".");
}
break;
// Move action received.
case "move":
dl_dest_sql.Write(case_record);
dl_source.Delete(key);
if (!dl_dest_sql.KeyExists(key))
{
SendStatus(MakeStatusJson(data, "Error"));
log.Error(data.dest_instrument + " case " + data.serial_number + " NOT moved from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_server_park + "@" + data.dest_hostname + ".");
}
if ((dl_dest_sql.KeyExists(key)) && (dl_source.KeyExists(key)))
{
SendStatus(MakeStatusJson(data, "Warn"));
log.Warn(data.dest_instrument + " case " + data.serial_number + " copied from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_server_park + "@" + data.dest_hostname + " but also still exists in " + data.source_server_park + "@" + data.source_hostname + ".");
}
if ((dl_dest_sql.KeyExists(key)) && (!dl_source.KeyExists(key)))
{
SendStatus(MakeStatusJson(data, "Case Moved"));
log.Info(data.dest_instrument + " case " + data.serial_number + " moved from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_server_park + "@" + data.dest_hostname + ".");
}
break;
// Invalid action received.
default:
SendStatus(MakeStatusJson(data, "Invalid Action"));
log.Error("Invalid action requested - " + data.action);
break;
}
}
// Connect to the Blaise file database destination data set if provided in payload.
if (data.dest_filepath != "" && data.dest_filepath != null)
{
// Check destination file database exists, and if not create it.
if (!File.Exists(data.dest_filepath + "\\" + data.dest_instrument + ".bdbx"))
{
// Get source BMI and BDI to setup new file destination data set.
string sourceBMI = GetSourceBMI(data.source_hostname, data.source_server_park, data.source_instrument);
string sourceBDI = GetSourceBDI(data.source_hostname, data.source_server_park, data.source_instrument);
// Create source directory from destination file path recieved in payload.
Directory.CreateDirectory(data.dest_filepath);
// Copy BMI from source to destination file path recieved in payload.
File.Copy(sourceBMI, data.dest_filepath + "\\" + data.dest_instrument + ".bmix", true);
// Create destination file data set.
IDataInterface di = DataInterfaceManager.GetDataInterface();
di.ConnectionInfo.DataSourceType = DataSourceType.Blaise;
di.ConnectionInfo.DataProviderType = DataProviderType.BlaiseDataProviderForDotNET;
di.DataPartitionType = DataPartitionType.Stream;
IBlaiseConnectionStringBuilder csb = DataInterfaceManager.GetBlaiseConnectionStringBuilder();
csb.DataSource = data.dest_filepath + "\\" + data.dest_instrument + ".bdbx";
di.ConnectionInfo.SetConnectionString(csb.ConnectionString);
di.DatamodelFileName = data.dest_filepath + "\\" + data.dest_instrument + ".bmix";
di.FileName = data.dest_filepath + "\\" + data.dest_instrument + ".bdix";
di.CreateTableDefinitions();
di.CreateDatabaseObjects(null, true);
di.SaveToFile(true);
}
// Connect to the Blaise file database destination data set.
dl_dest_file = DataLinkManager.GetDataLink(data.dest_filepath + "\\" + data.dest_instrument + ".bdix");
// Copy or move the case from the source to destination based on the 'action' received from the message.
switch (data.action)
{
// Copy action received.
case "copy":
dl_dest_file.Write(case_record);
if (dl_dest_file.ReadRecord(key) == null)
{
SendStatus(MakeStatusJson(data, "Error"));
log.Error(data.dest_instrument + " case " + data.serial_number + " NOT copied from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_filepath + ".");
}
if (dl_dest_file.ReadRecord(key) != null)
{
SendStatus(MakeStatusJson(data, "Case Copied"));
log.Info(data.dest_instrument + " case " + data.serial_number + " copied from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_filepath + ".");
}
break;
// Move action received.
case "move":
dl_dest_file.Write(case_record);
dl_source.Delete(key);
if (dl_dest_file.ReadRecord(key) == null)
{
SendStatus(MakeStatusJson(data, "Error"));
log.Error(data.dest_instrument + " case " + data.serial_number + " NOT moved from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_filepath + ".");
}
if ((dl_dest_file.ReadRecord(key) != null) && (dl_source.KeyExists(key)))
{
SendStatus(MakeStatusJson(data, "Warn"));
log.Warn(data.dest_instrument + " case " + data.serial_number + " copied from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_filepath + " but also still exists in " + data.source_server_park + "@" + data.source_hostname + ".");
}
if ((dl_dest_file.ReadRecord(key) != null) && (!dl_source.KeyExists(key)))
{
SendStatus(MakeStatusJson(data, "Case Moved"));
log.Info(data.dest_instrument + " case " + data.serial_number + " moved from " + data.source_server_park + "@" + data.source_hostname + " to " + data.dest_filepath + ".");
}
break;
// Invalid action received.
default:
SendStatus(MakeStatusJson(data, "Invalid Action"));
log.Error("Invalid action requested - " + data.action);
break;
}
}
}
}
else
{
SendStatus(MakeStatusJson(data, "Case NOT Found"));
log.Error("Case " + data.serial_number.ToString() + " doesn't exist in source database.");
}
}
catch (Exception e)
{
SendStatus(MakeStatusJson(data, "Error"));
log.Error(e);
}
// Remove from queue when done processing
channel.BasicAck(ea.DeliveryTag, false);
};
// Consume and process any messages already held on the queue.
string queueName = ConfigurationManager.AppSettings["HandlerQueueName"];
channel.BasicConsume(queue: queueName, autoAck: false, consumer: consumer);
}
public IKey GetPrimaryKey(IDatamodel dataModel)
{
return(DataRecordManager.GetKey(dataModel, PrimaryKeyName));
}
public IDataRecord GetDataRecord(IDatamodel dataModel)
{
return(DataRecordManager.GetDataRecord(dataModel));
}
public IKey GetKey(IDatamodel dataModel, string keyName)
{
return(DataRecordManager.GetKey(dataModel, keyName));
}