Transaction

```
@Retention(RUNTIME)
@Target({METHOD,TYPE})
public @interface Transaction
```
Causes the annotated method to be run in a transaction.
Nested @Transaction annotations (e.g. one method calls another method, where both methods have this annotation) are collapsed into a single transaction. If the outer method annotation specifies an isolation level, then the inner method must either specify the same level, or not specify any level.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`boolean`	`readOnly`	Set the connection readOnly property before the transaction starts, and restore it before it returns.
`TransactionIsolationLevel`	`value`	The transaction isolation level.

- Element Detail
  - value
```
TransactionIsolationLevel value
```
    The transaction isolation level.
    
    Returns:
    
    the transaction isolation level. If not specified, invoke with the default isolation level.
    
    Default:
    
    org.jdbi.v3.core.transaction.TransactionIsolationLevel.UNKNOWN
- - readOnly
```
boolean readOnly
```
    Set the connection readOnly property before the transaction starts, and restore it before it returns. Databases may use this as a performance or concurrency hint.
    
    Returns:
    
    whether the transaction is read only
    
    Default:
    
    false