org.springframework.jca.cci.core

Interface InteractionCallback<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

public interface InteractionCallback<T>

Generic callback interface for code that operates on a CCI Interaction. Allows to execute any number of operations on a single Interaction, for example a single execute call or repeated execute calls with varying parameters.

This is particularly useful for delegating to existing data access code that expects an Interaction 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(InteractionCallback), CciTemplate#execute(javax.resource.cci.InteractionSpec, javax.resource.cci.Record), CciTemplate#execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor)

Method Summary

Modifier and Type	Method and Description
T	doInInteraction(Interaction interaction, ConnectionFactory connectionFactory) Gets called by CciTemplate.execute with an active CCI Interaction.

Method Detail

doInInteraction

T doInInteraction(Interaction interaction,
                  ConnectionFactory connectionFactory)
           throws ResourceException,
                  java.sql.SQLException,
                  DataAccessException

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

If called without a thread-bound CCI transaction (initiated by CciLocalTransactionManager), the code will simply get executed on the CCI Interaction with its transactional semantics. If CciTemplate is configured to use a JTA-aware ConnectionFactory, the CCI Interaction 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:

interaction - active CCI Interaction

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

java.sql.SQLException - if thrown by a ResultSet method, to be auto-converted to a DataAccessException

DataAccessException - in case of custom exceptions

See Also:

javax.resource.cci.ConnectionFactory#getRecordFactory(), javax.resource.cci.ConnectionFactory#getMetaData(), CciTemplate#execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor)