JPA links (updated)

Reference implementation.

Official documentation:

• JSR 317 JPA 2 specification
• JSR 338 JPA 2.1 specification
• API Javadoc
• Hibernate API Javadoc

Others:

•  Wikibook (incomplete)

Providers often have good JPA documentation as well. Might include extensions (and JDO stuff) though:

• Open JPA
  
• EclipseLink JPA
• DataNucleus
• ObjectDB

Specific topics:

• JPA 2.x what's new
• Where to define JPQL queries
• Caching 
• Validation

Background:

•  ORM hate

Callable ManagedTaskListener

  class Japavapa implements Callable, ManagedTask, ManagedTaskListener {

    String word;
    LocalTime submit;

    public Japavapa(String word) {
      this.word = word;
    }

    public String toString() {
      return ":P " + word;
    }

    @Override
    public String call() throws Exception {
      Random rand = new Random();
      Thread.currentThread().sleep(rand.nextInt(1000));
      Matcher match = Pattern.compile("([AEIOUYaeiouy]+)").matcher(word);
      return match.find() ? match.replaceAll(match.group(1) + "p" + match.group(1)) : word;
    }

    @Override
    public ManagedTaskListener getManagedTaskListener() {
      return this;
    }

    @Override
    public Map<String, String> getExecutionProperties() {
      return null;
    }

    @Override
    public void taskSubmitted(Future<?> future, ManagedExecutorService executor, Object task) {
      submit = LocalTime.now();
      logger.info("SUBMIT " + task
        + " AT " + submit 
        + " ON " + executor);
    }

    @Override
    public void taskAborted(Future<?> future, ManagedExecutorService executor, Object task, Throwable exception) {
      logger.info("ABORTED " + task
        + " AFTER " + Duration.between(submit, LocalTime.now()).toMillis()
        + "ms ON " + Thread.currentThread().getName());
    }

    @Override
    public void taskDone(Future<?> future, ManagedExecutorService executor, Object task, Throwable exception) {
      logger.info("DONE " + task
        + " AFTER " + Duration.between(submit, LocalTime.now()).toMillis() + "ms");
    }

    @Override
    public void taskStarting(Future<?> future, ManagedExecutorService executor, Object task) {
      logger.info("STARTING " + task
        + " AFTER " + Duration.between(submit, LocalTime.now()).toMillis()
        + "ms ON " + Thread.currentThread().getName());
    }

  }