/*
* Copyright 2002-2008 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.jca.cci.core;
import java.sql.SQLException;
import javax.resource.ResourceException;
import javax.resource.cci.ConnectionFactory;
import javax.resource.cci.Interaction;
import org.springframework.dao.DataAccessException;
/**
* 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.
*
* <p>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
* <code>execute</code> variants.
*
* @author Thierry Templier
* @author Juergen Hoeller
* @since 1.2
* @see CciTemplate#execute(InteractionCallback)
* @see CciTemplate#execute(javax.resource.cci.InteractionSpec, javax.resource.cci.Record)
* @see CciTemplate#execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor)
*/
public interface InteractionCallback<T> {
/**
* Gets called by <code>CciTemplate.execute</code> with an active CCI Interaction.
* Does not need to care about activating or closing the Interaction, or
* handling transactions.
*
* <p>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.
*
* <p>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 <code>CciTemplate.execute</code>
* variants. A thrown RuntimeException is treated as application exception:
* it gets propagated to the caller of the template.
*
* @param interaction active CCI Interaction
* @param connectionFactory the CCI ConnectionFactory that the Connection was
* created with (gives access to RecordFactory and ResourceAdapterMetaData)
* @return a result object, or <code>null</code> if none
* @throws ResourceException if thrown by a CCI method, to be auto-converted
* to a DataAccessException
* @throws SQLException if thrown by a ResultSet method, to be auto-converted
* to a DataAccessException
* @throws DataAccessException in case of custom exceptions
* @see javax.resource.cci.ConnectionFactory#getRecordFactory()
* @see javax.resource.cci.ConnectionFactory#getMetaData()
* @see CciTemplate#execute(javax.resource.cci.InteractionSpec, RecordCreator, RecordExtractor)
*/
T doInInteraction(Interaction interaction, ConnectionFactory connectionFactory)
throws ResourceException, SQLException, DataAccessException;
}
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