Hibernate 3 - Transaction & Concurrency

JDBC Connection Handling Questions in this category test if :

• You know how to handle database connection (ConnectionProvider, ConnectionProviderFactory, hibernate.connection.provider_class property)
• You know connection related properties, possible values and their meaning.
  • how to provide a custom connection using hibernate.connection.provider_class
  • how to change default isolation level with hibernate.connection.isolation
  • how to change autocommit mode with hibernate.connection.autocommit
  • how to specify when Hibernate should release JDBC connections with hibernate.connection.release_mode

Optimistic Locking Questions in this category test if :

• you understand optimistic locking mechanism
• you know how to implement versioning (both number and timestamp based) in mapping files and Java classes
• you understand SQL generated by hibernate to achieve optimistic locking
• you understand first level cache / dirty checking interaction with optimistic locking

Pessimistic Locking Strategy Questions in this category test if :

• you understand pessimistic locking mechanism
• you can Differentiate LockModes and their meaning
• you know the different ways (APIs) to get a pessimistic lock on entity
• you know when the lock is released
• you can detect code that causes deadlocks

TransactionFactory & TransactionManagerLookup Questions in this category test if :

• you know how to configure TransactionFactory
• you know what "out of the box" transaction factories are
• you know how threads and sessions interact