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Download E-books Just Spring Data Access PDF

By Madhusudhan Konda

JDBC has simplified database entry in Java functions, yet a couple of nagging wrinkles remain—namely, persisting Java gadgets to relational databases. With this booklet, you’ll find out how the Spring Framework makes that activity exceedingly effortless with dependency injection, template periods, and object-relational-mapping (ORM).

Through pattern code, you’ll realize how Spring streamlines using JDBC and ORM instruments equivalent to Hibernate, the Java endurance API (JPA), and Java facts gadgets (JDO). If you’re a Java developer accustomed to Spring (perhaps via O’Reilly’s Just Spring instructional) and wish to strengthen your facts entry talents, this booklet indicates you how.
* easy methods to use Spring’s easy and complex facts entry instruments
* paintings with Spring’s JdbcTemplate category to split non-critical code from company code
* do away with placeholder variables on your queries with the NamedParameterJdbcTemplate type
* Use Spring’s template sessions to accomplish batch executions
* function inserts on database tables with out writing any SQL statements
* know about Spring’s help for Hibernate as an object-relational-mapping device
* Use JPA as a standards-based ORM—alone or with Spring help
* stream information from a relational to a non-relational database with JDO

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Enhancer. DataNucleusEnhancer target/classes/com/madhusudhan/jsd/jdo/*. type Set your classpath with the mandatory DataNucleus libraries and move your generated periods to the DataNucleusEnhancer type. The DataNucleusEnhancer will then control the . category records (bytecode) and produces acceptable sessions. evidently a command line application isn't any strong when you've got a continuing integration or subtle construct in position. DataNucleus presents extra thoughts to hold out bytecode improvements as well as the command line approach: utilizing Ant or Maven plugin. check with their documentation for extra information on the way to use Ant or Maven to make use of enhancers. instance attempt Now that you've got the whole lot in hand, executing a try out is easy, as proven under: public type JDOTest { ... public JDOTest() { ctx = new ClassPathXmlApplicationContext("jdo-beans. xml"); priceDAO = ctx. getBean("priceDao", JDOPriceDAO. class); } // use the DAO item to persist the associated fee inner most void persist(JDOPrice p) { priceDAO. persist(p); } public static void main(String[] args) { JDOTest attempt = new JDOTest(); JDOPrice p = ... try out. persist(p); } } The persist() name is delegated to the DAO, whereas the DAO calls the makePersistent() strategy at the PersistenceManager to persist the DAO. it's trouble-free to invoke any operations uncovered through the PersistenceManager after you have an example on hand from the manufacturing facility. As pointed out past, it's a strong perform to stay to local APIs and code instead of inducing pointless Spring dependencies. even though, for those who desire to use Spring’s vintage templates, the subsequent part is for you. operating with JdoTemplate operating with JdoTemplate couldn’t be any easier, due to Spring’s typical template designs. The JdoTemplate is developed by means of passing an example of PersistenceManagerFactory—we have already obvious constructing the manufacturing unit bean previous. we have to create is a DAO that instantiates the JdoTemplate utilizing the manufacturing facility reference. The JdoTemplate example is created as such: public category JdoTemplatePriceDAO { inner most PersistenceManagerFactory persistenceManagerFactory = null; deepest JdoTemplate jdoTemplate = null; public void setPersistenceManagerFactory (PersistenceManagerFactory persistenceManagerFactory) { jdoTemplate = new JdoTemplate(persistenceManagerFactory); } public PersistenceManagerFactory getPersistenceManagerFactory() { go back persistenceManagerFactory; } } Now that you've a deal with on making a JdoTemplate example, you should use the example to execute the necessary information entry operations: public classification JdoTemplatePriceDAO { // persisting singe rate public void persist(JDOPrice p){ jdoTemplate. makePersistent(p); } //persisting record of costs public void persistAllPrices(List prices){ jdoTemplate. makePersistentAll(prices); } ... } finally, twine all of the beans as proven under: Rovaa Book Archive > Computers > Download E-books Just Spring Data Access PDF

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