Sunday, September 2, 2012
spring transaction management
recently I wrote a spring code.
JdbcTemplate insert = new JdbcTemplate(dataSource);
insert.update("INSERT INTO item (price, item_category) VALUES(?,?)",new Object[] { beverage.getPrice(), beverage.getItemCategory() });
int id = insert.queryForInt( "SELECT last_insert_id()" );
System.out.println(id);return insert.update("INSERT INTO beverage (id, name, quantity,size) VALUES(?,?,?,?)", new Object[] { id,beverage.getName(), beverage.getQuantity(),beverage.getSize() });
How ever the id was always 0. There reason has been,
whole code above must be wrapped in a transaction. Otherwise JdbcTemplate can use a different connection from the pool for all statements and last_insert_id() is tied to a transaction.
Threfore @Transactional can be used to avoid this error.
How ever this solution can be applied only to non MyISAM type of tables. Because MyISAM type does not support transactions.
Labels:
java-ee,
simple java mistakes,
spring,
transaction
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