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## org.springframework.jca.cci.core
Interface ConnectionCallback<T>

    public interface ConnectionCallback<T>

Generic callback interface for code that operates on a CCI Connection. Allows to execute any number of operations on a single Connection, using any type and number of Interaction.

This is particularly useful for delegating to existing data access code that expects a Connection to work on and throws ResourceException. For newly written code, it is strongly recommended to use CciTemplate's more specific `execute` variants.

Since:
  1.2
Author:
  Thierry Templier, Juergen Hoeller
See Also:
  `CciTemplate.execute(ConnectionCallback)`, `CciTemplate.execute(javax.resource.cci.InteractionSpec, javax.resource.cci.Record)`, `CciTemplate.execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor)`

Method Summary
`T` | `doInConnection(Connection connection, ConnectionFactory connectionFactory)` Gets called by `CciTemplate.execute` with an active CCI Connection.

Method Detail

### doInConnection

    T doInConnection(Connection connection,
                     ConnectionFactory connectionFactory)
                     throws ResourceException,
                            SQLException,
                            DataAccessException

  Gets called by `CciTemplate.execute` with an active CCI Connection. Does not need to care about activating or closing the Connection, or handling transactions.

  If called without a thread-bound CCI transaction (initiated by CciLocalTransactionManager), the code will simply get executed on the CCI Connection with its transactional semantics. If CciTemplate is configured to use a JTA-aware ConnectionFactory, the CCI Connection and thus the callback code will be transactional if a JTA transaction is active.

  Allows for returning a result object created within the callback, i.e. a domain object or a collection of domain objects. Note that there's special support for single step actions: see the `CciTemplate.execute` variants. A thrown RuntimeException is treated as application exception: it gets propagated to the caller of the template.

  Parameters:
    `connection` - active CCI Connection
    `connectionFactory` - the CCI ConnectionFactory that the Connection was created with (gives access to RecordFactory and ResourceAdapterMetaData)
  Returns:
    a result object, or `null` if none
  Throws:
    `ResourceException` - if thrown by a CCI method, to be auto-converted to a DataAccessException
    `SQLException` - if thrown by a ResultSet method, to be auto-converted to a DataAccessException
    `DataAccessException` - in case of custom exceptions
  See Also:
    `ConnectionFactory.getRecordFactory()`, `ConnectionFactory.getMetaData()`, `CciTemplate.execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor)`

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