All about Transaction attributes:
TX_REQUIRES_NEW: Indicates that the enterprise bean must execute within the context of a new transaction
TX_REQUIRED: Indicates that the enterprise bean must execute within the context of a transaction
TX_NOT_SUPPORTED: Indicates that the enterprise bean cannot execute within the context of a transaction
TX_MANDATORY: Indicates that the enterprise bean must always execute within the context of the client's transaction
TX_SUPPORTS: Indicates that the enterprise bean can run with or without a transaction context.
Having a masters degree in Computational Science, working in Java, developed applications on different domains such as Finanical Services, B2B, Banking, Utility...