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POCoherence and container managed transactions
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copied!<p>I'm implementing simultaneous write into database and Oracle Coherence 3.7.1 and want to make whole operation transactional. </p> <p>I would like to have a critique on my approach. </p> <p>Currently, I've created façade class like this:</p> <pre><code>public class Facade { @EJB private JdbcDao jdbcDao; @EJB private CoherenceDao coherenceDao; @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) private void updateMethod(List<DomainObject> list) { jdbcDao.update(list); coherenceDao.update(list); } } </code></pre> <p>I guess JDBC DAO would not need to do anything specific about transactions, it something happens Hibernate would throw some kind of RuntimeException. </p> <pre><code>public class JdbcDao { private void update(List<DomainObject> list) { // I presume there is nothing specific I have to do about transactions. // if I don't catch any exceptions it would work just fine } } </code></pre> <p>Here is interesting part. How do I make Coherence support transactions? I guess I should open coherence transaction inside update() method and on any exceptions inside it I should throw RuntimeException myself?</p> <p>I currently thinking of something like this: </p> <pre><code>public class CoherenceDao { private void update(List<DomainObject> list) { // how should I make it transactional? // I guess it should somehow throw RuntimeException? TransactionMap mapTx = CacheFactory.getLocalTransaction(cache); mapTx.setTransactionIsolation(TransactionMap.TRANSACTION_REPEATABLE_GET); mapTx.setConcurrency(TransactionMap.CONCUR_PESSIMISTIC); // gather the cache(s) into a Collection Collection txnCollection = Collections.singleton(mapTx); try { mapTx.begin(); // put into mapTx here CacheFactory.commitTransactionCollection(txnCollection, 1); } catch (Throwable t) { CacheFactory.rollbackTransactionCollection(txnCollection); throw new RuntimeException(); } } } </code></pre> <p>Would this approach work as expected? </p>

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