/**
* Retrieve
*
* @throws IOException
* @throws IllegalArgumentException
* @throws NoSuchProviderException
* @throws NoSuchAlgorithmException
*/
private long computeAndReturnTime(
long remainTime, List<Entity> works, List<PlayWorkBean> playWorks)
throws NoSuchAlgorithmException, NoSuchProviderException, IllegalArgumentException,
IOException {
int sortedSize = works.size();
// randomize for getting work in the list
int randomId = Random.getInstance().getNumericRandomInt(sortedSize);
// get work
Entity currentWork = works.remove(randomId);
long randomWorkTime = 0;
// music case
if (WorkTypeEnum.MUSIC.name().equals(currentWork.getProperty("type"))) {
Long musicTime = (Long) currentWork.getProperty("time");
randomWorkTime = musicTime.longValue();
} else {
// randomize for work time displaying
randomWorkTime = minWorkTime + Random.getInstance().getNumericRandomInt(maxWorkTime);
}
// avoid randomWorkTime to be superior at remain time
if (remainTime < randomWorkTime) {
randomWorkTime = remainTime;
}
playWorks.add(new PlayWorkBean(Long.valueOf(randomWorkTime), currentWork.getKey()));
return randomWorkTime;
}
/**
* Searches for the entity based on the search criteria and returns the token linked to the
* result.
*/
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
super.doGet(req, resp);
String token = null;
Iterable<Entity> iterable = Work.getAllWorks();
Iterator<Entity> iter = iterable.iterator();
List<Entity> sortedList = new LinkedList<Entity>();
while (iter.hasNext()) {
sortedList.add(iter.next());
}
if (!sortedList.isEmpty()) {
long rightTime = sequenceTime; // in ms
int rightId = 0;
List<PlayWorkBean> rightFragment = new LinkedList<PlayWorkBean>();
long leftTime = sequenceTime; // in ms
int leftId = 0;
List<PlayWorkBean> leftFragment = new LinkedList<PlayWorkBean>();
try {
// init sequence token
token = Random.getInstance().getUniqueSessionId();
logger.log(Level.INFO, "Generating a new Optimized Sequence with token[" + token + "]");
while ((leftTime > 0 || rightTime > 0) && sortedList.size() > 1) {
if (rightTime > 0) {
rightTime = rightTime - computeAndReturnTime(rightTime, sortedList, rightFragment);
if ((rightFragment.size() % Fragment.fragmentMaxSize)
== 0) { // save the Fragment of fragmentMaxSize size
saveFragment(token, rightId, DisplayTypeEnum.R, rightFragment);
rightFragment = new LinkedList<PlayWorkBean>();
rightId++;
}
}
if (leftTime > 0) {
leftTime = leftTime - computeAndReturnTime(leftTime, sortedList, leftFragment);
if ((leftFragment.size() % Fragment.fragmentMaxSize)
== 0) { // save the Fragment of fragmentMaxSize size
saveFragment(token, leftId, DisplayTypeEnum.L, leftFragment);
leftFragment = new LinkedList<PlayWorkBean>();
leftId++;
}
}
}
// save right and left fragment without a complete fragmentMaxSize size
if (!rightFragment.isEmpty())
saveFragment(token, rightId, DisplayTypeEnum.R, rightFragment);
if (!leftFragment.isEmpty()) saveFragment(token, leftId, DisplayTypeEnum.L, leftFragment);
} catch (NoSuchAlgorithmException e) {
logger.log(Level.WARNING, e.getMessage());
} catch (NoSuchProviderException e) {
logger.log(Level.WARNING, e.getMessage());
} catch (IllegalArgumentException e) {
logger.log(Level.WARNING, e.getMessage());
} catch (IOException e) {
logger.log(Level.WARNING, e.getMessage());
}
PrintWriter out = resp.getWriter();
out.println(token);
return;
}
return;
}