This section summarizes the various transactional settings that can be specified using thetag. The defaultsettings are:
-
Propagation settingis
REQUIRED. -
Isolation level is
DEFAULT. -
Transaction is read/write.
-
Transaction timeout defaults to the default timeout of the underlying transaction system, or none if timeouts are not supported.
-
Any
RuntimeExceptiontriggers rollback, and any checkedExceptiondoes not.
You can change these default settings; the various attributes of thetags that are nested withinand``tags are summarized below:
Table13.1. settings
| Attribute | Required? | Default | Description |
|---|---|---|---|
name |
Yes | Method name(s) with which the transaction attributes are to be associated. The wildcard () character can be used to associate the same transaction attribute settings with a number of methods; for example,`get,handle_,on_Event`, and so forth. |
|
propagation |
No | REQUIRED | Transaction propagation behavior. |
isolation |
No | DEFAULT | Transaction isolation level. |
timeout |
No | -1 | Transaction timeout value (in seconds). |
read-only |
No | false | Is this transaction read-only? |
rollback-for |
No | Exception(s)that trigger rollback; comma-delimited. For example,com.foo.MyBusinessException,ServletException. |
|
no-rollback-for |
No | Exception(s)that do_not_trigger rollback; comma-delimited. For example,com.foo.MyBusinessException,ServletException. |