Exception handling (Try / Catch ) blocks use in Dynamics 365 finance and operations

Use the throw,  try... catch,  finally,   and retry  to generate  and handle exceptions.

In transaction developments(ttsbegin/ttscommit),use the  exception  presented below:  

• Deadlock -  Handling for deadlocks in the  database. The deadlock occurs  when multiple transactions are waiting for each other.
• UpdateConflict -  Handling for UpdateSConflicts. The update conflict occurs  when a transaction is using OCC (Optimistic Concurrence Control). The transaction can be repeated.
• DuplicateKeyException -  Handling for duplicate key field conflicts. Duplicity occurs when a transaction is using Optimistic Concurrence Control (OCC). The transaction can be repeated.

  #OCCRetryCount
  
      try
  
      {
  
  ttsbegin;
  
          Your code here
  
          ttscommit;
  
      }
  
      catch (Exception: :D eadlock)
  
      {
  
          Retry on deadlock
  
          retry;
  
      }
  
      catch (Exception::UpdateConflict)
  
      {
  
          Retry to resolve conflict update
  
  if (appl.ttsLevel() ==  0)
  
          {
  
              if (xSession::currentRetryCount() >= #RetryNum)
  
              {
  
                  throw Exception::UpdateConflictNotRecovered;
  
              }
  
              else
  
              {
  
                  retry;
  
              }
  
          }
  
          else
  
          {
  
              throw Exception::UpdateConflict;
  
          }
  
      }
  
      catch(Exception: :D uplicateKeyException)
  
      {
  
          Retry in case of a duplicate key conflict
  
  if (appl.ttsLevel() ==  0)
  
          {
  
              if (xSession::currentRetryCount() >= #RetryNum)
  
              {
  
                  throw Exception::D uplicateKeyExceptionNotRecovered;
  
              }
  
              else
  
              {
  
                  retry;
  
              }
  
          }
  
          else
  
          {
  
              throw Exception::D uplicateKeyException;
  
          }
  
      }

Hope you find this useful, I will come up with another interesting blog post.