Configure atomikos for hazelcast - hazelcast

Question

How can i configure Atomikos for HazelCast instance.As per the mastering-hazel cast we can only do it in java.How can i configure like i do for databases.If configuring is java is the way,then how i can make use of TransactionalTask to remove the boilerplate code starting and committing the transactions.i have tried like
public void insertIntoGridJTA( final List<String> list)
throws NotSupportedException, SystemException,
IllegalStateException, RollbackException {
HazelcastInstance hazelcast = Hazelcast.newHazelcastInstance();
HazelcastXAResource xaResource = hazelcast.getXAResource();
TransactionContext context = xaResource.getTransactionContext();
hazelcast.executeTransaction(new TransactionalTask<Object>() {
public Object execute(TransactionalTaskContext context)
throws TransactionException {
// TODO Auto-generated method stub
TransactionalMap<Integer, String> map = context.getMap("demo");
System.out.println("map"+map.getName());
for (int i = 0; i < list.size(); i++) {
map.put(i, list.get(i));
}
return null;
}
});
}
But the transaction is not starting if i am using TransactionalTask

Answer 1

Did you had a look at the Atomikos example in our examples repo? https://github.com/hazelcast/hazelcast-code-samples/blob/master/transactions/xa-transactions/src/main/java/XATransaction.java

Answer 2

In addition to #noctarius, I have done it like this in the past
#Autowired
private JdbcTemplate jdbcTemplate;
#Autowired
private HazelcastXAResource hzXAResource;
#Autowired
private UserTransactionManager userTransactionManager;
#Transactional
public void insert() throws SystemException, RollbackException {
final Transaction transaction = userTransactionManager.getTransaction();
transaction.enlistResource(hzXAResource);
final TransactionContext hzTransactionContext = hzXAResource.getTransactionContext();
final TransactionalMap<Long, String> hzCustomerMap = hzTransactionContext.getMap("hzCustomerMap");
// Use a Java 8 stream to print out each tuple of the list
CUSTOMERS_TEST_DATA.forEach(customer -> {
log.info("Inserting customer record for {}", customer);
hzCustomerMap.put(customer.getId(), customer.toString());
});
jdbcTemplate.batchUpdate(Sql.SQL_INSERT.getSql(), new BatchPreparedStatementSetter() {
#Override
public void setValues(PreparedStatement ps, int i) throws SQLException {
ps.setString(1, CUSTOMERS_TEST_DATA.get(i).getFirstName());
ps.setString(2, CUSTOMERS_TEST_DATA.get(i).getLastName());
}
#Override
public int getBatchSize() {
return CUSTOMERS_TEST_DATA.size();
}
});
// Uncomment this to test the failure of the transaction
// hzCustomerMap.values((Predicate) entry -> {
// throw new RuntimeException();
// });
transaction.delistResource(hzXAResource, XAResource.TMSUCCESS);
}