private ITisServiceCreator InstanciateCreator(
ITisServiceInfo oServiceInfo)
{
// Get creator type
string sCreatorType =
oServiceInfo.ServiceCreatorType;
// Create Creator instance
object oObjCreator = ActivatorHelper.CreateInstance(
sCreatorType,
EmptyArrays.ObjectArray);
ITisServiceCreator oCreator = null;
try
{
// Try to cast
oCreator = (ITisServiceCreator)oObjCreator;
}
catch (InvalidCastException oExc)
{
throw new TisException(
oExc, // Inner
"Object [{0}] doesn't implements ITisServiceCreator",
oObjCreator);
}
return(oCreator);
}
public object GetService(
TisServiceKey oServiceKey)
{
object oService = null;
try
{
// Obtain service creator
ITisServiceCreator oCreator = GetCreator(oServiceKey);
// Create the service instance using creator
oService = oCreator.CreateService();
}
catch (Exception oExc)
{
Log.WriteError(
"ServiceActivator.GetService({0}) Failed, {1}",
oServiceKey,
oExc.Message);
throw;
}
// Return the service
return(oService);
}
private void SetCreatorContext(
ITisServiceCreator oCreator,
TisServiceKey oServiceKey)
{
// Set creator context
m_oServicesHost.CreatorContextSetter.SetCreatorContext(
oCreator,
m_sAppName,
oServiceKey,
m_oServicesHost);
}
public void ReleaseService(
TisServiceKey oServiceKey,
ITisServiceInfo serviceInfo = null,
object oService = null)
{
if (oService == null && IsInstantiated(oServiceKey))
{
oService = m_oCreatorsCache.Get(oServiceKey);
}
if (oService != null)
{
// Obtain service creator
ITisServiceCreator oCreator = GetCreator(oServiceKey);
oCreator.ReleaseService(oService);
}
}
protected override void SetCreatorContextImpl(
ITisServiceCreator oCreator,
string sAppName,
TisServiceKey oServiceKey,
ITisServicesHost oServicesHost)
{
// Query for ISupportsCreatorContext interface
ISupportsCreatorContext oTarget =
oCreator as ISupportsCreatorContext;
if (oTarget != null)
{
// Set context
oTarget.SetContext(
sAppName,
oServiceKey,
oServicesHost);
}
}
private object CreatorsCache_OnCacheMiss(
object oSender,
CacheMissEventArgs oArgs)
{
TisServiceKey oServiceKey = (TisServiceKey)oArgs.Key;
// Obtain service info
ITisServiceInfo oServiceInfo =
m_oServicesHost.CheckedGetServiceInfo(m_sAppName, oServiceKey.ServiceName);
// Validate we can host the service
ValidateCanHostService(oServiceInfo);
// Obtain service creator
ITisServiceCreator oCreator =
InstanciateCreator(oServiceInfo);
// Set creator context
SetCreatorContext(oCreator, oServiceKey);
return(oCreator);
}
public virtual void SetCreatorContext(
ITisServiceCreator oCreator,
string sAppName,
TisServiceKey oServiceKey,
ITisServicesHost oServicesHost)
{
// Perform context set
SetCreatorContextImpl(
oCreator,
sAppName,
oServiceKey,
oServicesHost);
// If has next setter in the chain
if (Next != null)
{
// Forward the request to next setter
Next.SetCreatorContext(
oCreator,
sAppName,
oServiceKey,
oServicesHost);
}
}
protected abstract void SetCreatorContextImpl(
ITisServiceCreator oCreator,
string sAppName,
TisServiceKey oServiceKey,
ITisServicesHost oServicesHost);
