/*
*/
package com.googlecode.objectify.test;
import java.util.concurrent.Future;
import java.util.logging.Logger;
import org.testng.annotations.Test;
import com.google.appengine.api.datastore.AsyncDatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.Key;
import com.googlecode.objectify.cache.TriggerFuture;
import com.googlecode.objectify.test.util.TestBase;
import com.googlecode.objectify.util.FutureHelper;
/**
* Tests of the TriggerFuture
*
* @author Jeff Schnitzer <jeff@infohazard.org>
*/
public class TriggerFutureTests extends TestBase
{
/** */
@SuppressWarnings("unused")
private static Logger log = Logger.getLogger(TriggerFutureTests.class.getName());
/** This seemed to be an issue related to the listenable but apparently not */
@Test
public void testSimpleAsyncGetWithDatastore() throws Exception
{
AsyncDatastoreService ads = DatastoreServiceFactory.getAsyncDatastoreService();
Entity ent = new Entity("thing");
ent.setUnindexedProperty("foo", "bar");
// Without the null txn (ie, using implicit transactions) we get a "handle 0 not found" error
Future<Key> fut = ads.put(null, ent);
fut.get();
}
/** Some weird race condition on listenable future */
@Test
public void testRaceCondition() throws Exception
{
AsyncDatastoreService ads = DatastoreServiceFactory.getAsyncDatastoreService();
for (int i=0; i<100; i++)
{
final int which = i;
final Entity ent = new Entity("thing");
ent.setUnindexedProperty("foo", "bar" + i);
@SuppressWarnings("unused")
TriggerFuture<Key> fut = new TriggerFuture<Key>(ads.put(null, ent)) {
@Override
protected void trigger()
{
// This magic line makes the key get updated. Without this line,
// we get what looks like some sort of race condition - the error
// happens at varying iterations.
FutureHelper.quietGet(this);
Key k = ent.getKey();
if (!k.isComplete())
throw new IllegalStateException("Failed completeness at " + which);
}
};
}
}
}