Spring / Java Transactions (JTA)
What are the different types of transaction demarcation?
Declarative Demarcation: When using declarative demarcation, you specify what transaction demarcation modes should be used around certain areas of code. Rather than implementing these demarcations directly in your code, you declare the demarcations in a configuration file or deployment descriptor. The application server is then responsible for making sure that the correct transactional behavior is used around the specified area.
Programmatic Demarcation: At times, you might need to demarcate transactions in your code. Generally, you should use programmatic demarcation as little as possible, as it is error-prone and can interfere with the application server?s own transaction demarcation mechanisms. If you find it necessary to use programmatic demarcation, you must be very careful to ensure that your code handles any unexpected errors and conditions.
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