/// <summary>
/// Access process instance holding a write lock
/// Process instance will be updated in the instance repository.
/// </summary>
/// <param name="instanceId"></param>
/// <param name="dlg"></param>
private void AccessProcessReadWriteLock(string instanceId, AccessProcessInstanceDelegate dlg)
{
bool ready = false;
using (IResourceLock rl = LockManager.AcquireWriterLock(instanceId, TimeSpan.MaxValue))
{
ProcessInstance pi = InstanceRepository.GetProcessInstance(instanceId);
if (pi == null)
{
log.Warn("Process instance not found: {0}", instanceId);
dlg(null);
return;
}
using (TransactionScope ts = new TransactionScope(_transactionOption))
{
try
{
pi.Environment = this;
pi.Activate();
log.Info("Original: {0}", pi.SaveState().ToXmlString("Process"));
dlg(pi);
pi.Passivate();
log.Info("Modified: {0}", pi.SaveState().ToXmlString("Process"));
ready = pi.Status == ProcessStatus.Ready;
InstanceRepository.UpdateProcessInstance(pi);
ts.Complete();
}
catch (Exception ex)
{
log.Error("Error updating process {0} : {1}", instanceId, ex);
throw;
}
}
}
if (ready)
{
NotifyReadyProcessSaved();
}
}
/// <summary>
/// Access process instance holding a readonly lock
/// Process instance is not updated.
/// </summary>
/// <param name="instanceId"></param>
/// <param name="dlg"></param>
private void AccessProcessReadonlyLock(string instanceId, AccessProcessInstanceDelegate dlg)
{
using (IResourceLock rl = LockManager.AcquireReaderLock(instanceId, TimeSpan.MaxValue))
{
ProcessInstance pi = InstanceRepository.GetProcessInstance(instanceId);
if (pi != null)
{
pi.Environment = this;
pi.Activate();
}
dlg(pi);
}
}