// public method to add a new worker into the collection
private void AddProcess(WorkerFormatter workerDefinition)
{
if (workerReferences != null)
{
// validate the name is unique
string processName = workerDefinition.ProcessName;
if (workerReferences.ContainsKey(processName))
{
throw new ArgumentException("Process Name Must be Unique: " + processName);
}
// create a worker object in the worker array
workerReferences.Add(processName, new WorkerInstance(workerDefinition));
}
}
// the work object constructor that validates and saves the constructor defintion
public WorkerInstance(WorkerFormatter workerFormatter)
{
// save the constructor definition and indicate process starting
workerDefinition = workerFormatter;
workerDefinition.ProcessStatus = WorkerFormatter.SFProcessStatus.StatusInitialized;
// indicate the worker class has not been started or paused
workerRunning = false;
workerPaused = false;
// validate the number of threads is within an acceptable range
if (workerDefinition.NumberThreads <= 0 || workerDefinition.NumberThreads > 255)
{
throw new ArgumentException("Must have a postive value for the number of threads");
}
// validate the worker object has been correctly assigned a name
if (workerDefinition.ProcessName == null)
{
throw new ArgumentException("Must have a non-null value for the process name");
}
// ensure that the description has a value
if (workerDefinition.ProcessDesc == null)
{
workerDefinition.ProcessDesc = workerDefinition.ProcessName;
}
// validate the input and error queue path has been passed
if (workerDefinition.InputQueue == null || workerDefinition.ErrorQueue == null)
{
throw new ArgumentException("Must have a non-null value for the queues");
}
// save a reference to the parent service and worker description
serviceDesc = MSMQListner.ServiceControlDesc;
workerDesc = workerDefinition.ProcessDesc;
}
protected override void OnStart(string[] args)
{
LogInformation("Service to Start");
// register the perfmon counters
PerfmonInstall();
XmlDocument configXmlDoc;
WorkerFormatter workerDefinition;
// access the XML configuration file and validate against the schema
try
{
configXmlDoc = new XmlDocument();
//Load the the document with the last book node.
configXmlDoc.Load(ConfigurationSettings.AppSettings["ConfigurationFile"].ToString());
}
catch (Exception ex)
{
PerfmonUninstall();
LogError("Invalid XML Configuration File: " + ex.Message);
throw ex;
}
try
{
//LogInformation("File loaded and ready to add");
foreach (XmlNode processXmlDefinition in configXmlDoc.GetElementsByTagName("ThreadDefinition"))
{
workerDefinition = new WorkerFormatter();
string processName = processXmlDefinition.Attributes.GetNamedItem("ThreadName").Value;
workerDefinition.ProcessName = processName;
workerDefinition.NumberThreads = Convert.ToInt32(processXmlDefinition.Attributes.GetNamedItem("NumberThreads").Value);
// determine the transaction status of the processing
switch (Convert.ToBoolean(processXmlDefinition.Attributes.GetNamedItem("Transactions").Value))
{
case false:
workerDefinition.Transactions = WorkerFormatter.SFTransactions.NotRequired;
break;
case true:
workerDefinition.Transactions = WorkerFormatter.SFTransactions.Required;
break;
default:
throw new ApplicationException("Unknown Required Transaction State");
}
workerDefinition.ProcessDesc = processXmlDefinition.ChildNodes[0].InnerText;
workerDefinition.InputQueue = processXmlDefinition.ChildNodes[1].InnerText;
workerDefinition.ErrorQueue = processXmlDefinition.ChildNodes[2].InnerText;
workerDefinition.SmtpServer = processXmlDefinition.ChildNodes[3].InnerText;
workerDefinition.ErrorEmails = processXmlDefinition.ChildNodes[4].InnerText;
workerDefinition.Subject = processXmlDefinition.ChildNodes[5].InnerText;
workerDefinition.MessageLimit = int.Parse(processXmlDefinition.ChildNodes[6].InnerText);
workerDefinition.Delay = int.Parse(processXmlDefinition.ChildNodes[7].InnerText);
AddProcess(workerDefinition);
// LogInformation("adding: " + processName + " Threads: " + workerDefinition.NumberThreads);
}
}
catch (Exception ex)
{
PerfmonUninstall();
LogError("Service Start Failed: " + ex.Message);
workerReferences.Clear();
throw ex;
}
// call the start method on each worker object
foreach (WorkerInstance workerReference in workerReferences.Values)
{
try
{
workerReference.StartService();
}
catch (Exception)
{
// a start failed but continue with other creations
// one could decide to abort the start process at this point
}
}
// indicate the service has started
LogInformation("Service Started");
}
