How do I rollback a transaction scope?
If you want to rollback a transaction, you should not call the Complete method within the transaction scope. For example, you can throw an exception within the scope. The transaction in which it participates in will be rolled back.
What is ambient transaction?
Ambient Transaction A transaction which automatically identifies a code block that needs to support a transaction without explicitly mentioning any transaction related things. An ambient transaction is not tied just to a database, any transaction aware provider can be used.
What is transaction scope in Entity Framework?
Entity Framework is already operating within a TransactionScope. The connection object in the transaction passed is null. That is, the transaction is not associated with a connection – usually this is a sign that that transaction has already completed.
What would you do if an exception happens during that transaction?
A client application should handle this case by assuming failure, pausing for three seconds, calling Session. rollback, and then retrying the operations.
What is Oracle isolation level?
The read committed transaction isolation level is the Oracle default. With this setting, each query can see only data committed before the query, not the transaction, began. Oracle queries do not read dirty, or uncommitted, data; however, it does not prevent other transaction from modifying data read by a query.
Does TransactionScope work with Entity Framework?
Is SaveChanges a transaction?
In Entity Framework, the SaveChanges() method internally creates a transaction and wraps all INSERT, UPDATE and DELETE operations under it. Multiple SaveChanges() calls, create separate transactions, perform CRUD operations and then commit each transaction.
How do you catch exceptions in transactional method?
Handling exceptions during a @Transactional method in Spring
- Naive approach: Just catch the Exception.
- Flush the EntityManager before exiting.
- Make two service classes.
- Handle DataIntegrityViolationException in the controller.
- Don’t catch DataIntegrityViolationException.
- Do not use declarative transaction management.
Why do we need MSDTC?
The Microsoft Distributed Transaction Coordinator (MSDTC) service is a component of modern versions of Microsoft Windows that is responsible for coordinating transactions that span multiple resource managers, such as databases, message queues, and file systems.
What is the use of TransactionScope?
TransactionScope(Transaction, TimeSpan, EnterpriseServicesInteropOption) Initializes a new instance of the TransactionScopeclass with the specified timeout value and COM+ interoperability requirements, and sets the specified transaction as the ambient transaction, so that transactional work done inside the scope uses this transaction.
How does the scope of a transaction interact with the transaction?
Once determined, the scope always participates in that transaction. The decision is based on two factors: whether an ambient transaction is present and the value of the TransactionScopeOptionparameter in the constructor. The ambient transaction is the transaction your code executes in.
How do I create a new ambient TransactionScope object?
A TransactionScope object has three options: Join the ambient transaction, or create a new one if one does not exist. Be a new root scope, that is, start a new transaction and have that transaction be the new ambient transaction inside its own scope.
What happens when a TransactionScope object is disposed of?
When a TransactionScope object joins an existing ambient transaction, disposing of the scope object may not end the transaction, unless the scope aborts the transaction. If the ambient transaction was created by a root scope, only when the root scope is disposed of, does Commit get called on the transaction.