@Test
public void testLazyListRetrievalPerformance() throws InterruptedException, ExecutionException {
EntityManagerSimpleJPA em = (EntityManagerSimpleJPA) factory.createEntityManager();
Query query;
List<MyTestObject> obs;
long start = System.currentTimeMillis();
int numItems = 120;
Future future = null;
for (int i = 0; i < numItems; i++) {
MyTestObject object = new MyTestObject();
object.setName("Scooby doo");
object.setAge(i);
System.out.println("persisting " + i);
future = em.persistAsync(object);
}
// let them save
System.out.println("Waiting for all persists to complete.");
future.get();
long duration = System.currentTimeMillis() - start;
printAndLog("duration of persists=" + duration);
start = System.currentTimeMillis();
System.out.println("querying for all objects...");
query = em.createQuery("select o from MyTestObject o ");
obs = query.getResultList();
for (MyTestObject ob : obs) {
System.out.println("ob=" + ob);
}
duration = System.currentTimeMillis() - start;
printAndLog("duration of retreival and prints=" + duration);
start = System.currentTimeMillis();
System.out.println("querying for all objects...");
query = em.createQuery("select o from MyTestObject o ");
obs = query.getResultList();
for (MyTestObject ob : obs) {
System.out.println("ob=" + ob);
}
duration = System.currentTimeMillis() - start;
printAndLog("duration of retreival and prints after first load=" + duration);
em.close();
}
@Test
public void testPutQueryDelete() throws ExecutionException, InterruptedException {
int numItems = 1;
String x;
EntityManagerSimpleJPA em = (EntityManagerSimpleJPA) factory.createEntityManager();
PerformanceTestObject o = new PerformanceTestObject();
o.setS1("first to create domain");
em.persist(o);
StopWatch stopWatch = new StopWatch();
String s1a = "attribute1";
String s2a = "attribute2";
Future<PerformanceTestObject> lastFuture = null;
stopWatch.start();
for (int i = 0; i < numItems; i++) {
o = new PerformanceTestObject();
o.setS1(s1a);
o.setS2(s2a);
lastFuture = em.persistAsync(o);
}
lastFuture.get(); // not 100% accurate, but good enough
stopWatch.stop();
System.out.println(
"puts duration="
+ stopWatch.getTime()
+ ", "
+ em.getTotalOpStats().getPuts()
+ " items put.");
Thread.sleep(5000);
stopWatch.reset();
stopWatch.start();
Query query = em.createQuery("select o from PerformanceTestObject o");
List<PerformanceTestObject> resultList = query.getResultList();
System.out.println("iterating result list...");
int i = 0;
for (PerformanceTestObject performanceTestObject : resultList) {
i++;
if (i % 100 == 0) {
System.out.println(i);
}
}
stopWatch.stop();
System.out.println(
"query ALL duration="
+ stopWatch.getTime()
+ ", "
+ em.getTotalOpStats().getGets()
+ " items got.");
stopWatch.reset();
stopWatch.start();
System.out.println("Deleting ALL...");
for (PerformanceTestObject performanceTestObject : resultList) {
lastFuture = em.removeAsync(o);
}
lastFuture.get();
stopWatch.stop();
System.out.println(
"delete duration=" + stopWatch.getTime() + ", " + resultList.size() + " items deleted.");
System.out.println("sleeping...");
Thread.sleep(30000);
em.close();
}