[appengine-java] Re: gae.parent-pk doesnt work in list query
i raised it as an issue as i am unable to get resolution. http://code.google.com/p/googleappengine/issues/detail?id=5897 vote if u has a similar problem. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: gae.parent-pk doesnt work in list query
On Aug 15, 6:09 pm, datanucleus andy_jeffer...@yahoo.com wrote: however i have the following issues. 1.I am using the query Select c from ChatUser c where c.key =:keyList elsewhere and it is working fine. How can it be working? Because Google didn't respect valid JDOQL when they implemented their plugin and allowed nonsense like that query (the syntax is GQL). For portability you should never use it. fair enough. But when i use a normal key field everything works. any ideas? @Basic private Key parentKey2; Query chatUserQuery = em.createQuery(Select c from ChatUser c where c.parentKey2 IN (:parentKeyList)); The log tells you plenty about the query, and just wish people could refer to it. i got logging set to DEBUG. all i see in my logs is the following. is there something in my logging that i have missed? 18:21:31,184 DEBUG [DataNucleus.Query] - JPQL Single-String with Select c from ChatUser c where c.parentKey IN (:parentKeyList) 18:21:31,197 DEBUG [DataNucleus.Query] - JPQL Query : Compiling SELECT c FROM ChatUser c WHERE c.parentKey IN (:parentKeyList) 18:21:31,206 DEBUG [DataNucleus.ClassLoading] - Class java.lang.ChatUser was not found in the CLASSPATH [Class resolver called from org.datanucleus.util.Imports.resolveClassDeclaration (line=177)] 18:21:31,206 DEBUG [DataNucleus.ClassLoading] - Class java.lang.ChatUser was not found in the CLASSPATH [Class resolver called from org.datanucleus.util.Imports.resolveClassDeclaration (line=177)] 18:21:31,215 DEBUG [DataNucleus.Query] - JPQL Query : Compile Time = 18 ms 18:21:31,217 DEBUG [DataNucleus.Query] - DATASTORE Query : Executing SELECT c FROM ChatUser c WHERE c.parentKey IN (:parentKeyList) ... thanks -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: gae.parent-pk doesnt work in list query
On Aug 12, 7:03 pm, datanucleus andy_jeffer...@yahoo.com wrote: Invalid JPQL (a Key cannot equal a List). This makes more sense Select c from ChatUser c where c.parentKey IN :parentKey thanks for the response. however i have the following issues. 1.I am using the query Select c from ChatUser c where c.key =:keyList elsewhere and it is working fine. How can it be working? 2. When i run the IN i get the following error. org.datanucleus.store.appengine.query.DatastoreQuery $UnsupportedDatastoreFeatureException: Problem with query SELECT c FROM ChatUser c WHERE c.parentKey IN :parentKeyList: Unexpected expression type while parsing query: org.datanucleus.query.expression.SubqueryExpression have got these queries completely wrong? -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: gae.parent-pk doesnt work in list query
1.I am using the query Select c from ChatUser c where c.key =:keyList
elsewhere and it is working fine. How can it be working?
i now concerned how the above query can work.
i assumed it was producing an IN/OR query, hence limited by 30 OR
statements.
however unit testing in the development environment shows that i can
run over 130 elements in the List parameter without any fault
generation.
ie
ListKey parentList = new ArrayListKey();
parentList.add(user1.getKey());
parentList.add(user2.getKey());
for( int i=0; i130; i++){
parentList.add(KeyFactory.createKey(ChatUser.CLASS_NAME, i
+11) );
}
what i thought i understood is now very confusing.
-lp
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[appengine-java] Re: gae.parent-pk doesnt work in list query
On Aug 12, 7:03 pm, datanucleus andy_jeffer...@yahoo.com wrote: Invalid JPQL (a Key cannot equal a List). This makes more sense Select c from ChatUser c where c.parentKey IN :parentKey i tried the IN clause it get the same error. @Basic @Extension(vendorName=datanucleus, key=gae.parent-pk, value = true) private Key parentKey; Query chatUserQuery = em.createQuery(Select c from ChatUser c where c.parentKey IN (:parentKeyList)); produces error java.lang.ClassCastException: java.util.ArrayList cannot be cast to com.google.appengine.api.datastore.Key at org.datanucleus.store.appengine.query.DatastoreQuery.internalPkToKey(DatastoreQuery.java: 1484) But when i use a normal key field everything works. @Basic private Key parentKey2; Query chatUserQuery = em.createQuery(Select c from ChatUser c where c.parentKey2 IN (:parentKeyList)); the issue seems to be with the gae.parent-pk not the query. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] gae.parent-pk doesnt work in list query
hi all
when i try to query using the gae.parent-pk IN a list, it is failing
with a ClassCastException below. i can use the parent key in a query
for a single value fine.
any ideas why this doesnt work?
java.lang.ClassCastException: java.util.ArrayList cannot be cast to
com.google.appengine.api.datastore.Key
at
org.datanucleus.store.appengine.query.DatastoreQuery.internalPkToKey(DatastoreQuery.java:
14
this is the query
---
Query chatUserQuery = em.createQuery(Select c from ChatUser c where
c.parentKey=:parentKey);
chatUserQuery.setParameter(parentKey, keyList);
chatUserList = (ListChatUser) chatUserQuery.getResultList();
this is the JPA
--
public class ChatUser {
public static final String CLASS_NAME = ChatUser;
public static final String FIND_BY_PARENT_KEY =
ChatUser.findByParentKey;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key key;
@Basic
@Extension(vendorName=datanucleus, key=gae.parent-pk, value =
true)
private Key parentKey;
}
-lp
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[appengine-java] sdk 1.5.2 removes exploding indexes!!!
has anyone read this. http://googleappengine.blogspot.com/2011/07/app-engine-152-sdk-released.html Advanced Query Planning - We are removing the need for exploding indexes and reducing the custom index requirements for many queries. The SDK will suggest better indexes in several cases and an upcoming article will describe what further optimizations are possible. i havent tried it out yet but i wanna see if it reduces my write cost on list properties. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/uli40PUyGqIJ. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: DataStore Statistics not updated for at least 2 days
magic. the statistics have been updated. thanks mr google. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/HvDe2orXucgJ. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] DataStore Statistics not updated for at least 2 days
hi all the database stats have NOT been updated for at least 2 days. it says last updated 19:10:27 but clear what day it happened. what can be done to get them updated? -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/C4b789TBJQ0J. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[google-appengine] XMPP and user registration
hi all after reading the GAE XMPP API i cant find what i am looking for. i require my server to register a user with a third party XMPP server. however i cant see any mechanism of achieving this with/out the GAE XMPP API. Problem 1. there is no connection/authentication to external XMPP server in API. Problem 2. 3rd party XMPP libraries are using TCP sockets will not work in GAE. Question. How can i register a user from a GAE application? thanks -lp -- You received this message because you are subscribed to the Google Groups Google App Engine group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/4IFLHzGk1FUJ. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[appengine-java] Re: overcome onetomany limitation of 5000
thanks guys for your suggestions. but having a separate entity holding the foreign key will make updates unusable for even moderate size relationships 1000. i have used essentially the same approach suggested by nicole but each 'relational' entity will hold a list of foreign keys rather than a single key. this makes update significantly faster as i have less relational entities to update. This provides a solution to what google appengine guys call 'fan out problem'. hope this helps others. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] overcome onetomany limitation of 5000
hi all
i am modelling a unowned one-to-many relationship using list properties.
@Entity
public class User{
String name;
Boolean loggedIn;
@Basic
private ListKey friends;
}
all is good. i can run queries like
query = Select p from PositionUser p where p.friends = :userKey and +
AND p.loggedIn = true
However there is a limit on the number of index available per entity of
5000. (although i am hitting the limit at 2500 for some reason)
i have 2 problems with the current approach
#1. below the 5000 limit each addition to the friend list will require a
fetch of the entire list, then add item and then put to datastore.
this is rather expensive in CPU.
#2. How can i allow for 5000 in the onetomany?
any suggestion pls
-lp
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[google-appengine] Re: maximum number of values in all indexes for an entity -what is it?
yeap the production server is different to the dev environment. i am getting the following error in prod when adding a to a list of 2500 to the entity. : com.google.apphosting.api.ApiProxy$ApplicationException: ApplicationError: 1: Too many indexed properties for entity: app: however this is well short of the 5000 hard limit advertised. any idea where the other 2500 indexes are being used? -lp -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[google-appengine] maximum number of values in all indexes for an entity -what is it?
hi guys i am attempting to understand the limits below. see http://code.google.com/appengine/docs/java/datastore/overview.html Limit maximum entity size 1 megabyte maximum number of values in all indexes for an entity (1) 5,000 values 1. An entity uses one value in an index for every column × every row that refers to the entity, in all indexes. The number of index values for an entity can grow large if an indexed property has multiple values, requiring multiple rows with repeated values in the table. i am not sure what it means. i thought the limit would apply to list properties, but my test of 5002 elements in a list was successful in the dev environment. any help in clarifying what the limit means is helpful thanks -lp -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[appengine-java] Re: NoResultException causes rollback transaction why?
ok this looks like Spring transaction issue. when the @Transactional is removed the NoResultException does not affect the commit. this is f#$$ -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] NoResultException causes rollback transaction why?
guys
in my JPA code a NoResultException causes the transaction to be rollback.
i am using the spring txn manger but all JPA methods are @Transactional(
propagation=Propagation.NOT_SUPPORTED).
any help pls.
@Transactional( propagation=Propagation.NOT_SUPPORTED)
public void txnMethod( CollectionLong list) throws
ApplicationExecption{
for (IteratorLong iterator = list.iterator(); iterator.hasNext();)
{
Long fbId = iterator.next();
PositionUser user = null;
final Query query =
em.createNamedQuery(PositionUser.FIND_BY_FB_ID);
query.setParameter(facebookId, fbId);
try {
user = (PositionUser) query.getSingleResult();
}
catch (NoResultException e) {
log.info( error occured: + e.toString() );
}catch (NonUniqueResultException e) {
throw new ApplicationExecption(e);
}
if(user!= null) {
ListKey friends = user.getFriends();
PositionUser findUser = em.find(PositionUser.class,
friends.get(0));
findUser.getFriends().remove(user.getKey());
em.merge(findUser);
}
em.remove(user);
}
}
-lp
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[appengine-java] Re: NoResultException causes rollback transaction why?
that previous example code was too complex... phew it was a late night
this a simpler example of the a method that does a rollback when a
NoResultException is thrown.
even if the exception is handled it doesnt matter the txn is rollback and no
commits are done.
if the NoResultException is NOT thrown the method commits correctly.
is this voodoo or something?
@Transactional( propagation=Propagation.NOT_SUPPORTED)
public void txnMethod( CollectionLong list) throws
ApplicationExecption{
for (IteratorLong iterator = list.iterator(); iterator.hasNext();)
{
Long fbId = iterator.next();
PositionUser user = null;
final Query query =
em.createNamedQuery(PositionUser.FIND_BY_FB_ID);
query.setParameter(facebookId, fbId);
try {
user = (PositionUser) query.getSingleResult();
}
catch (NoResultException e) {
log.info( error occured: + e.toString() );
}catch (NonUniqueResultException e) {
throw new ApplicationExecption(e);
}
if(user!= null) {
user.setAccuracy(5000);
em.merge(user);
}
}
}
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[google-appengine] Re: High CPU Warning - Is it really an issue?
So my question is, should I be concerned at the high CPU warnings or is it something most people experience? i am getting similar CPU times and very similar elapsed times as u. but i get large variation in my CPU times for no apparent reason ( same query, params). i am using 'Always-on' so it cant be warm up request. all that i am concerned about is my elapsed time and my quota cost for scalability. so far so it can scale. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[appengine-java] Re: stdout in my logs
# I 2011-03-06 20:14:32.566 [minglegeo/1.348824067992053184].stdout: 04 strangely they are not present in my dev environment. any one getting a similar issue? -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Hosting Java application
Sorry for the stupid noob question. I'm creating a Java Application that use several libraries and basically gets streams from twitter and somehow use them to save jpg images. I wonder if Google App Engine is what I need to keep my application running without need to run it on my computer permanently. And is it possible to do that at all? the only out bound connections available on appengine are http. so if twitter supports http, all good. saving images no problem hope that helps. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[google-appengine] is paid support available?
hi all, is paid support for appengine available? thanks -lp -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[google-appengine] Request CPU variance with 'Always-on'
hi all, i have getting large variance in my request and api cpu on a java app. I have read the countless articles on the topic and the quota doc. what i am seeing is *not* do to process startup as i have 'Always on' enabled since there is no more of the ' This request required a process to startup. Below are a sample of the logs for the same query within 15 minutes. 2011-03-07 22:07:56.183 /fbconnect/update 200 157ms 518cpu_ms 261api_cpu_ms 2011-03-07 22:06:18.738 /fbconnect/update 200 310ms 611cpu_ms 261api_cpu_ms 2011-03-07 21:56:23.973 /fbconnect/update 200 309ms 518cpu_ms 261api_cpu_ms 2011-03-07 21:51:55.193 /fbconnect/update 200 663ms 985cpu_ms 261api_cpu_ms 2011-03-07 21:50:30.879 /fbconnect/update 200 157ms 448cpu_ms 261api_cpu_ms 2011-03-07 23:06:10.153 /fbconnect/update?id=37002 200 326ms 1862cpu_ms 1652api_cpu_ms 2011-03-07 23:02:28.721 /fbconnect/update?id=37002 200 347ms 1842cpu_ms 1585api_cpu_ms 2011-03-07 23:02:28.675 /fbconnect/update?id=37002 200 217ms 506cpu_ms 156api_cpu_ms 2011-03-07 22:53:08.199 /fbconnect/update?id=37002 200 737ms 2135cpu_ms 1585api_cpu_ms 2kb Mingle/1.1.1.3 CFNetwork/485.12.7 what is going on is my app really written that dodgy? the same query is being executed each time but the results have an enormous variance on the elapsed time and request cpu. I have profiled my code and i can see where the variations are happening but it is in JPA calls like em.find, em.merge which are fairly basic stuff. Q1.what is causing this variance... my code or appengine accounting? any help is most welcome. -- You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
[appengine-java] Re: Need Help in Unit Testing (How to convert btw Entity and JDO class)
i havent unit tested with JDO but with JPA. But i expect it to work the same. the example on the http://code.google.com/appengine/docs/java/tools/localunittesting.html is using the datastoreService, since u are using JDO u will need a persistence manager. no need for 'Entity' just use JDO or JPA. The magic is done by the LocalServiceTestHelper.setup so your problem is the error below java.lang.NullPointerException: No API environment is registered for this thread. This means there is no datastore attached to your pm. Post your code for test setup and pm initialisation. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Request CPU variance with 'Always-on'
hi all, i have getting large variance in my request and api cpu. I have read the countless articles on the topic and the quota doc. what i am seeing is *not* do to process startup as i have 'Always on' enabled since there is no more of the ' This request required a process to startup. Below are a sample of the logs for the same query within 15 minutes. 2011-03-07 22:07:56.183 /fbconnect/update 200 157ms 518cpu_ms 261api_cpu_ms 2011-03-07 22:06:18.738 /fbconnect/update 200 310ms 611cpu_ms 261api_cpu_ms 2011-03-07 21:56:23.973 /fbconnect/update 200 309ms 518cpu_ms 261api_cpu_ms 2011-03-07 21:51:55.193 /fbconnect/update 200 663ms 985cpu_ms 261api_cpu_ms 2011-03-07 21:50:30.879 /fbconnect/update 200 157ms 448cpu_ms 261api_cpu_ms the same query is being executed each time but the results have an enormous variance on the elapsed time and request cpu. Q1.what is causing this variance... my code or appengine accounting? On the positive the api cpu is constant at 261. any help is most welcome. -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: appcfg deployment hangs at jsp compile
ok got to the bottom of this. it seems that the javac wasnt hung, just runing slow. about 60 s/ jsp page. by removing the datanucleus-enhancer-1.1.4.jar from my WEB-INF/lib the problem was resolved. i guess datanuclues jars should be in there but what a waste of 8 hours ;-( hope this help another. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] stdout in my logs
hi all i am getting loads of the following trace in my logs. # I 2011-03-06 20:14:32.566 [minglegeo/1.348824067992053184].stdout: 04 for each request i get about 30 lines of this stuff. why? i dont know what is causing it to be generated? i have searched for System.out but i am only using log.info, error etc. any ideas? -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: how to do fast write datastore, google io 2008
2. how to combine the results from all these classes and list the comments by date? I dont understanding this part. any sample code on this? you will need 3 queries. one query for each entity. each queries will need to be executed individualy. ie (puesdo code) pm.execute(select c.text from CommentA c where date=?) pm.execute(select c.text from CommentB c where date=?) pm.execute(select c.text from CommentC c where date=?) so your write may be fast but now your reads will be slow. u cant 'OR' the queries since they are different entities. This solution doesnt look like a scalable solution for bigtable. was the article for SQL tables NOT bigtable? -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] appcfg deployment hangs at jsp compile
hi guys i cannot deploy to appengine because the appcfg hangs at 8% jsp compiling. i have deployed hundreds of these and i dunno what is wrong. i am losing my mind over this simple deployment. appcfg.cmd update c:\src\mingle\geoserver\trunk\target\geoserver-1.0- SNAPSHOT Reading application configuration data... 4/03/2011 15:15:00 com.google.apphosting.utils.config.AppEngineWebXmlReader read AppEngineWebXml INFO: Successfully processed c:/src/mingle/geoserver/trunk/target/ geoserver-1.0- SNAPSHOT\WEB-INF/appengine-web.xml 4/03/2011 15:15:00 com.google.apphosting.utils.config.AbstractConfigXmlReader re adConfigXml INFO: Successfully processed c:/src/mingle/geoserver/trunk/target/ geoserver-1.0- SNAPSHOT\WEB-INF/web.xml 4/03/2011 15:15:00 com.google.apphosting.utils.config.AbstractConfigXmlReader re adConfigXml INFO: Successfully processed c:/src/mingle/geoserver/trunk/target/ geoserver-1.0- SNAPSHOT\WEB-INF/cron.xml 4/03/2011 15:15:00 com.google.apphosting.utils.config.IndexesXmlReader readConfi gXml INFO: Successfully processed c:\src\mingle\geoserver\trunk\target \geoserver-1.0- SNAPSHOT\WEB-INF\appengine-generated\datastore-indexes-auto.xml Beginning server interaction for minglegeo... 0% Creating staging directory 5% Scanning for jsp files. 8% Compiling jsp files. thats it.. it stay like that for ever. after 1 minute 10 minutes doesnt matter. nothing changes. no errors in console or logs. a javac process is running with 0 cpu i am using jdk1.6_06 any help is most appreciated for my sanity, thanks -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Problem with query - jdo
The persistence layer uses lazy-load approach, so when in jsp it tries to access to entities extracted from the database it throws exception because the persistence manager is just closed. So, how to avoid this problem? so either use eager fetch... not a good idea for large objects. OR use a VTO pattern (http://java.sun.com/blueprints/patterns/ TransferObject.html) to populate ur presentation objects. this enables the persistence layer transaction to be abstracted away from presentation. VTO pattern is more usefull. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Testing data migration using JDO and DataNucleus
are u sure u wont to proceed with that plan of changing out enhanced JDO classes? just sounds to complicated. -lp On Mar 3, 5:21 am, Jason G ja...@bobberinteractive.com wrote: Hello everyone! We've run into a data migration-test problem, and I'm wondering if anyone would have any advice on how to proceed... We're building a system that needs to allow hot-swapping of application builds while customers are actively using our webapp, and that means we need to support data object schema migration in- place. We do this by implementing LoadCallback for version migration, and @Deprecated-ing no-longer-used fields. So far, so good. Thing is, we'd like to build up a test suite that allows developers to write unit tests for data migration against a local environment. That means no uploading to GAE, but using com.google.appengine.tools.development.testing.LocalServiceTestHelper instead. We have two classes directories: Both containing DataNucleus-JDO- enhanced .class files, one of the old schema, and one of the current. We have a MigrationTestHelper that creates a GroovyClassLoader with the old schema set as its classpath. The targetted class under test is found, instantiated, and passed to a test-supplied Closure that initializes the object with the old data to be migrated. The Helper calls PersistenceManager.makePersistent and returns pm.getObjectId(newlyPersisted).getKey(). The second half of the test involves creating a new GroovyClassLoader and setting the context class loader: Thread.currentThread().setContextClassLoader(loader). Then we use a different PersistenceManager (from a different PersistenceManagerFactory) to load the object by its Key. What happens is we get a ClassCastException: java.lang.ClassCastException: java.lang.Long cannot be cast to java.util.List at com.x.model.User.jdoReplaceField(User.groovy) at com.x.model.User.jdoReplaceFields(User.groovy) at org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java: 2772) at org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java: 2791) at org.datanucleus.store.appengine.DatastorePersistenceHandler.fetchObject(DatastorePersistenceHandler.java: 480) It *appears* as though the JDOStateManagerImpl uses an array of fields to get/set values. You can crack open the enhanced .class files and see there's a method called __jdoFieldNamesInit() that sets up a static list of Fields. The old User contains the field: balance, which is a Long. The new User contains the fields: balance, which is @Deprecated and is Long, and _balances, which is a List. Looking in the .class files, it looks like each field is ordered alphabetically, so in old User, balance is index 0, where in new User, balance is index 1 and _balances is index 0. Hence the ClassCastException. I'm stuck on how to proceed. I'd have thought that fields would be replaced based on field name, not on an index... Especially an index that we don't appear to be able to control. But if it's the case that fields are placed by index on load, how does data migration work on AppEngine itself? Our migration code works fine there... Is this a DataNucleus issue? An issue with LocalServiceTestHelper? An issue of developer sanity? ;) Any insight would be greatly appriciated! Thanks! Jason -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: How to write a JPA unit test for GAE?
ok i finally got this sorted. it seems that i was making life too difficult by making tests transactional. by removing the @transactional on unit tests everything works nice and simple. thanks for your help -lp On Nov 15, 4:51 pm, lp lucio.picc...@gmail.com wrote: hi vikas thanks for the spring config. i got the same config but still cant get aunittestto persist data, and then execute a query on it. i noticed that your config does not use bean class=org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor / how does the entitymanager get injected? have u got the code available? i cant see what i am doing wrong! -lp On Nov 15, 3:02 pm, Vikas Hazrati vhazr...@gmail.com wrote: hi lucio, I have added the requested information as an answer to your comment on the blog post. http://thoughts.inphina.com/2010/06/28/unit-testing-maven-based-jpa-a... regards | Vikaswww.inphina.com On Nov 15, 4:23 am, lp lucio.picc...@gmail.com wrote: hi vikas nice blog u have there. However i cant reproduce your results theunit testwith spring. can u post your spring config to see what i have done wrong. thanks -lp On Nov 13, 3:58 pm, Vikas Hazrati vhazr...@gmail.com wrote: You could get more information on the way we set up our testing infra here http://thoughts.inphina.com/2010/06/28/unit-testing-maven-based-jpa-a... Regards | Vikaswww.inphina.com -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: How to write a JPA unit test for GAE?
hi vikas nice blog u have there. However i cant reproduce your results the unit test with spring. can u post your spring config to see what i have done wrong. thanks -lp On Nov 13, 3:58 pm, Vikas Hazrati vhazr...@gmail.com wrote: You could get more information on the way we set up our testing infra here http://thoughts.inphina.com/2010/06/28/unit-testing-maven-based-jpa-a... Regards | Vikaswww.inphina.com -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: How to write a JPA unit test for GAE?
hi vikas thanks for the spring config. i got the same config but still cant get a unit test to persist data, and then execute a query on it. i noticed that your config does not use bean class=org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor / how does the entitymanager get injected? have u got the code available? i cant see what i am doing wrong! -lp On Nov 15, 3:02 pm, Vikas Hazrati vhazr...@gmail.com wrote: hi lucio, I have added the requested information as an answer to your comment on the blog post. http://thoughts.inphina.com/2010/06/28/unit-testing-maven-based-jpa-a... regards | Vikaswww.inphina.com On Nov 15, 4:23 am, lp lucio.picc...@gmail.com wrote: hi vikas nice blog u have there. However i cant reproduce your results theunit testwith spring. can u post your spring config to see what i have done wrong. thanks -lp On Nov 13, 3:58 pm, Vikas Hazrati vhazr...@gmail.com wrote: You could get more information on the way we set up our testing infra here http://thoughts.inphina.com/2010/06/28/unit-testing-maven-based-jpa-a... Regards | Vikaswww.inphina.com -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] How to write a JPA unit test for GAE?
hi all,
i have been attempting to convert my existing JPA code over to GAE.
All is working so far except for the unit tests.
i read
code.google.com/appengine/docs/java/tools/localunittesting.html
but it doesnt describe how to get an entityManager involved in usefull
unit tests.
so this is my test. please advise how to achieve the functionality in
this test.
@Test
public void findFriendsSimple() {
PositionUser user1 = new PositionUser();
user1.setFirstName(john);
user1.setLastName(smith);
PositionUser user2 = new PositionUser();
user2.setFirstName(mary);
user2.setLastName(smith);
PositionUser user3 = new PositionUser();
user3.setFirstName(barney);
user3.setLastName(smith);
em.persist(user2);
em.persist(user3);
//em.flush(); --- can use flush for non transaction test
user1.getFriends().add(user2.getKey());
user1.getFriends().add(user3.getKey());
em.persist(user1);
//em.flush(); --- can use flush for non transaction test
Query query = em.createNamedQuery(PositionUser.FIND_FRIENDS);
query.setParameter(userKey, user1.getKey());
List resultList = query.getResultList();
assertEquals( 2, resultList.size() );
}
the assert is triggered
java.lang.AssertionError: expected:2 but was:0
this is because the entitymanager wont detect the persisted entities
that arent in a transaction.
ok no problem, i will add transactions.
But when i do it complains that i am adding multiple groups in a single
transaction.
So besides the simple gae sample unit test, how are others writting
useful unit tests in gae?
any help is most appreciated
-lp
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[appengine-java] Re: How to write a JPA unit test for GAE?
thanks for the detailed response didier.
the layout of the entities is fine, as transactions are not used in
the application itself, but as a artefact for unit testing.
i only placed the unit tests into a transaction for the purposes of
flushing the to entityManager.
since txn dont work for multiple entities how can i structure my unit
tests to ensure that the entity manager can perform a query on
populated data?
ie.
@Test
public void mytest(){
//populate ds with data... some how ??
Query query = em.createNamedQuery(PositionUser.FIND_FRIENDS)
List resultList = query.getResultList();
assertEquals( 2, resultList.size() );
}
thanks
-lp
On Nov 10, 8:44 pm, Didier Durand durand.did...@gmail.com wrote:
Hi,
Entities that you persist in the datastore are grouped in so called
entity groups for reason of scalability and transactionality
That means that the ds groups your entities on various data servers
according to their keys: this mechanism is not transparent - it
generates the exception that you encounter when you touch entities
belonging to more than 1 group in a single transaction.
This mechanism is specific to GAE: it means that it is not transparent
when you migrate the source code an already existing JPA app. You may
have to rethink your data architecture and modify code accordingly.
You should read the dev docs and articles:
1)http://code.google.com/appengine/docs/python/datastore/keysandentityg...
2)http://code.google.com/appengine/docs/java/datastore/transactions.html
3)http://blog.dantup.com/2010/01/app-engine-entity-groups-contention-an...
4)http://hoangle.info/2010/08/01/datastore-in-google-app-engine-entity-...
hope it helps
On Nov 10, 10:37 am, lp lucio.picc...@gmail.com wrote:
hi all,
i have been attempting to convert my existing JPA code over to GAE.
All is working so far except for the unit tests.
i read
code.google.com/appengine/docs/java/tools/localunittesting.html
but it doesnt describe how to get an entityManager involved in usefull
unit tests.
so this is my test. please advise how to achieve the functionality in
this test.
@Test
public void findFriendsSimple() {
PositionUser user1 = new PositionUser();
user1.setFirstName(john);
user1.setLastName(smith);
PositionUser user2 = new PositionUser();
user2.setFirstName(mary);
user2.setLastName(smith);
PositionUser user3 = new PositionUser();
user3.setFirstName(barney);
user3.setLastName(smith);
em.persist(user2);
em.persist(user3);
//em.flush(); --- can use flush for non transaction test
user1.getFriends().add(user2.getKey());
user1.getFriends().add(user3.getKey());
em.persist(user1);
//em.flush(); --- can use flush for non transaction test
Query query = em.createNamedQuery(PositionUser.FIND_FRIENDS);
query.setParameter(userKey, user1.getKey());
List resultList = query.getResultList();
assertEquals( 2, resultList.size() );
}
the assert is triggered
java.lang.AssertionError: expected:2 but was:0
this is because the entitymanager wont detect the persisted entities
that arent in a transaction.
ok no problem, i will add transactions.
But when i do it complains that i am adding multiple groups in a single
transaction.
So besides the simple gae sample unit test, how are others writting
useful unit tests in gae?
any help is most appreciated
-lp
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[appengine-java] Re: How to write a JPA unit test for GAE?
Instead of flushing, did you try a PersistenceManager.close() that
should lead to the same effect ? After the close, you get a new pm via
the PMF and that should do it.
i dunno if i can do that so easily as the entityManager is injected by
spring.
i have a very very very simple example that doesnt not work under gae/
spring.
what do i need to get this to work under gae?
this test case *works* fine under hibernate but fails with gae with a
assert after the query.
any ideas?
@SuppressWarnings(unchecked)
@Test
public void findUserSimple() {
PositionUser user1 = new PositionUser();
user1.setFirstName(john);
user1.setLastName(smith);
user1.setFacebook(11);
em.persist(user1);
em.refresh(user1);
System.out.println( key: + user1.getKey());
PositionUser find = em.find(PositionUser.class, user1.getKey());
assertNotNull(find);
Query query = em.createQuery(Select p from PositionUser p where
p.firstName=:firstname);
query.setParameter(firstname, user1.getFirstName());
List resultList = query.getResultList();
assertEquals( 1, resultList.size() ); --- assert fails here
}
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[appengine-java] package 'datastore_v3' or call 'Rollback()' was not found
hi all, when running a unit test using i am getting the error below. i have followed the data store unit test guide lines. http://code.google.com/appengine/docs/java/tools/localunittesting.html#Writing_Datastore_Tests is it as simple as a missing jar, but which one? WARNING: Caught exception while allowing TestExecutionListener [org.springframework.test.context.transaction.transactionaltestexecutionliste...@18346a3] to process 'after' execution for test: method [public void com.asteriski.mingle.geo.entity.PositionUserEntityTest.insertWithGoogleDataSource()], instance [com.asteriski.mingle.geo.entity.positionuserentityt...@19299f5], exception [java.lang.NullPointerException] com.google.apphosting.api.ApiProxy$CallNotFoundException: The API package 'datastore_v3' or call 'Rollback()' was not found. at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:95) at com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall(DatastoreApiHelper.java: 58) at com.google.appengine.api.datastore.TransactionImpl.makeSyncCall(TransactionImpl.java: 42) at com.google.appengine.api.datastore.TransactionImpl.makeSyncCall(TransactionImpl.java: 56) at com.google.appengine.api.datastore.TransactionImpl.rollback(TransactionImpl.java: 77) i assume that i am missing a appengine jar file in the maven dependencies. is that correct? any help is appreciated. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: package 'datastore_v3' or call 'Rollback()' was not found
ok i was missing a maven dependency for appengine-api-1.0- sdk-1.3.8.jar. the gae-plugin was hiding the visibility of it to the test phase. so i can now run a junit test with transaction using persistence. -lp On Nov 10, 2:17 pm, lp lucio.picc...@gmail.com wrote: hi all, when running a unit test using i am getting the error below. i have followed the data store unit test guide lines.http://code.google.com/appengine/docs/java/tools/localunittesting.htm... is it as simple as a missing jar, but which one? WARNING: Caught exception while allowing TestExecutionListener [org.springframework.test.context.transaction.transactionaltestexecutionliste...@18346a3] to process 'after' execution for test: method [public void com.asteriski.mingle.geo.entity.PositionUserEntityTest.insertWithGoogleDataSource()], instance [com.asteriski.mingle.geo.entity.positionuserentityt...@19299f5], exception [java.lang.NullPointerException] com.google.apphosting.api.ApiProxy$CallNotFoundException: The API package 'datastore_v3' or call 'Rollback()' was not found. at com.google.apphosting.api.ApiProxy.makeSyncCall(ApiProxy.java:95) at com.google.appengine.api.datastore.DatastoreApiHelper.makeSyncCall(DatastoreApiHelper.java: 58) at com.google.appengine.api.datastore.TransactionImpl.makeSyncCall(TransactionImpl.java: 42) at com.google.appengine.api.datastore.TransactionImpl.makeSyncCall(TransactionImpl.java: 56) at com.google.appengine.api.datastore.TransactionImpl.rollback(TransactionImpl.java: 77) i assume that i am missing a appengine jar file in the maven dependencies. is that correct? any help is appreciated. -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: Trouble unit testing JPA data access objects.
how did u get your unit tests to run in tx? i cant seem to get an active transaction. i followed all the links in this thread and more. any help appreciated -lp -- You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] JPA transaction not active in Spring unit test
hi all,
i am attempting to unit test my JPA code in a Spring unit test.
i read all the doco about gae unit tests.
i have this working in normal hibernate JPA with a specific tx
manager.
I cant see how the txManager is wired up.
however i get the following error
javax.persistence.TransactionRequiredException: This operation
requires a transaction yet it is not active
at
org.datanucleus.jpa.EntityManagerImpl.assertIsActive(EntityManagerImpl.java:
846)
at org.datanucleus.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:
545)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator
$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:
365)
at $Proxy29.flush(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
the test is simple enuff
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { classpath:WEB-INF/entitymanager-
context.xml, classpath:WEB-INF/applicationContext.xml })
@TestExecutionListeners( { DependencyInjectionTestExecutionListener.class })
@TransactionConfiguration( defaultRollback=false,
transactionManager=transactionManager)
@Transactional
public abstract class MyTestCase {
private final LocalServiceTestHelper helper =
new LocalServiceTestHelper(new
LocalDatastoreServiceTestConfig());
@PersistenceContext
protected
EntityManager em;
@Test
public void findFriendsSimple() {
PositionUser user1 = new PositionUser();
user1.setFirstName(john);
user1.setLastName(smith);
user1.setGeohash(Geohash.encode(lat+=0.0001, lon));
em.persist(user1);
em.flush(); - throws here
PositionUser find = em.find(PositionUser.class,
user1.getKey());
assertEquals( john, find.getFirstName());
assertEquals( 2, find.getFriends().size() );
System.out.println(--running query now);
Query query = em.createNamedQuery(PositionUser.FIND_FRIENDS);
query.setParameter(userKey, user1.getKey());
List resultList = query.getResultList();
assertEquals( 2, resultList.size() );
}
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[appengine-java] Re: datanucleus enhancer keeps running
i tried using gae sdk 1.3.1 but still got enhancer looping.
it seems to happen when i include spring 3.x libs i dunno giving
up and going for ant task.
-lp
On Mar 3, 1:43 am, Rajeev Dayal rda...@google.com wrote:
Seehttp://code.google.com/p/googleappengine/issues/detail?id=2115. This may
be the issue that you're having. It was recently fixed, and a version of GPE
with the fix is forthcoming.
On Thu, Feb 25, 2010 at 1:57 PM, Steve Pritchard steve...@gmail.com wrote:
On Feb 25, 6:39 am, haole mejoe...@gmail.com wrote:
i'm using eclipse 3.5.1, GPE 3.5 (1.2.0.v200912062003), GAE
1.3.1.v201002101412, GWT 2.0.3.v201002191036
datanucleusenhancer continuously runs over and over again
temporary workaround: turn off build automatically feature in eclipse
I have several projects with a dependency hierarchy. I found the
enhancer to be fragile and it often would not enhance the classes. I
had to do a 'clean' to make it happen. I could not find the pattern to
when it failed to enhance. It never looped on me so you may be seeing
a different problem.
About 3 weeks ago I had had enough and turned off the Enhancer
builder (the plugin yelled at me). In its place I added an ant task
to do the enhancement. I derived the ant task statements from the
Datanucleus site. Since that time things have been very stable and
the enhancer always finishes its job.
This is the essence of the ant task:
!--
--
!-- T A S K D E F
S --
!--
--
taskdef name=enhance
classname=com.google.appengine.tools.enhancer.EnhancerTask
classpath
pathelement path=${appengine.tools.classpath}/
pathelement path=${appengine.tools.lib}/
/classpath
/taskdef
!--
--
!-- T A R G E T
S --
!--
--
target name=enhance.cls
description=Performs Datnucleus JDO enhancement on compiled
data classes.
!-- echo message= path ${appengine.tools.classpath}/ --
!-- echo message= fileset ${proj.dir.gen.cls}/ --
enhance failonerror=true verbose=false
classpath
pathelement path=${appengine.tools.classpath}/
fileset dir=${proj.dir.war.lib} includes=*.jar/
pathelement path=${proj.dir.gen.cls}/
/classpath
fileset dir=${proj.dir.gen.cls} includes=**/*.class/
/enhance
/target
target name=enhance.war
description=Performs Datnucleus JDO enhancement on war
classes.
!-- echo message= path ${appengine.tools.classpath}/ --
!-- echo message= fileset ${proj.dir.gen.cls}/ --
enhance failonerror=true verbose=false
classpath
pathelement path=${appengine.tools.classpath}/
fileset dir=${proj.dir.war.lib} includes=*.jar/
pathelement path=${proj.dir.war.cls}/
/classpath
fileset dir=${proj.dir.war.cls} includes=**/*.class/
/enhance
/target
It may be worth a try.
Steve
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[appengine-java] Application code attempted to create a EntityManagerFactory named transactions-optional,
hi there
i am attempting a very simple task of running a junit + spring
+...@persistencecontext but getting the following error
Caused by: java.lang.IllegalStateException: Application code attempted
to create a EntityManagerFactory named transactions-optional, but one
with this name already exists! Instances of EntityManagerFactory are
extremely slow to create and it is usually not necessary to create one
with a given name more than once. Instead, create a singleton and
share it throughout your code. If you really do need to create a
duplicate EntityManagerFactory (such as for a unittest suite), set the
appengine.orm.disable.duplicate.emf.exception system property to avoid
this error.
at
org.datanucleus.store.appengine.jpa.DatastoreEntityManagerFactory.checkForRepeatedAllocation
(DatastoreEntityM
the junit class is simple
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { classpath:entitymanager-
context.xml })
public class PositionUserBusinessTest extends LocalStorageTestCase {
@PersistenceContext
EntityManager em;
@Autowired
PositionUserBusiness business;
@test
void something test()
entitymanager-context.xml
!-- entity manager --
bean id=entityManagerFactory
class=org.springframework.orm.jpa.LocalEntityManagerFactoryBean
lazy-init=true
property name=persistenceUnitName
value=transactions-optional /
/bean
bean name=transactionManager
class=org.springframework.orm.jpa.JpaTransactionManager
property name=entityManagerFactory
ref=entityManagerFactory /
/bean
bean id=positionUserBusiness
class=com.asteriski.mingle.geo.business.PositionUserBusiness/
i dont understand why it is complaining about the mulitple instances
of persistence unit called ' transactions-optional' as it is only
being referenced by the spring binding.
what is the problem?
any help most appreciated.
-lp
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[appengine-java] Re: convert JDO query to JPA
EntityManager em = EMF.get().createEntityManager();
PrintWriter out = response.getWriter();
ListDog dogs;
try {
Query query = em.createQuery(SELECT FROM Dog WHERE
dogFriends = :key);
query.setParameter(key, key);
dogs = (ListDog) query.getResultList();
dogs.size(); // Do this so we can eager load the list and
solve it!
running your code in my unit test i still get a 0 size result list.
*until* i added the following in my unittest
Dog user1 = new Dog()
//blah blah
em.merge(user1);
em.close(); -- needed to close existing em
em = getEnityManager();
//query now executes correctly
it seems that the entity manager is not working as i expected.
by doing em.close after making objects persistent and then getting new
em, allowed the em.query to execute correctly.
i am not clear of why the em behaviours like that, given the em.find()
seem to find the correct object.
any ideas?
-lp
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[appengine-java] Re: convert JDO query to JPA
EntityManager em = EMF.get().createEntityManager();
PrintWriter out = response.getWriter();
ListDog dogs;
try {
Query query = em.createQuery(SELECT FROM Dog WHERE
dogFriends = :key);
query.setParameter(key, key);
dogs = (ListDog) query.getResultList();
dogs.size(); // Do this so we can eager load the list and
solve it!
running your code in my unit test i still get a 0 size result list.
*until* i added the following in my unittest
Dog user1 = new Dog()
//blah blah
em.merge(user1);
em.close(); -- needed to close existing em
em = getEnityManager();
//query now executes correctly
it seems that the entity manager is not working as i expected.
by doing em.close after making objects persistent and then getting new
em, allowed the em.query to execute correctly.
i am not clear of why the em behaviours like that, given the em.find()
seem to find the correct object.
any ideas?
-lp
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[appengine-java] Re: convert JDO query to JPA
Can you post the JPA version of your entity?
@Entity
public class Friend {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key key;
private String lastName;
public int crud;
private String firstName;
@Basic
private CollectionKey friends;
I've just built something similar, and if I pass a Key to:
query.setParameter(key, key);
This works correctly, though if I pass the String key to it
query.setParameter(key, someLongString);
what was ur query? was the query to filter on a collection?
i have set the parameters against primitive members successfully but
not against collection members.
It returns an empty list. Could this be what is happening?
no.i just retested my code to make sure i hadnt messed up. i am
definitely using a Key not a string.
//JPA
javax.persistence.Query query = em.createQuery(select from Friend f
where f.friends=:key);
query.setParameter(key, user2.getKey());
return list of 0
using the *same* JPA entity code the JDO works fine
//JDO
javax.jdo.Query query = pm.newQuery(Friend.class);
Key myKey = user2.getKey();
query.declareParameters(com.google.appengine.api.datastore.Key
myKey);
query.setFilter(friends == myKey);
query.setOrdering(lastName ASC, firstName ASC);
ListFriend friendList = (ListFriend) query.execute(myKey);
return correct list
Q1 can u post your JPA code so i can see what u have done differently?
Q2. is mixing JPA and JDO ok? ie. JPA entity and JDO seems to work for
me.
Q3.how does the collection equality filter work in app engine? I have
not found any docs to explain the 'voodoo' like behaviour.
from what i can determine the collection filter is executed on the
data store and not in the application as the unfiltered list executed
the 1000 row limit.
it works but i dont understand how.
any help most appreciated
-lp
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[google-appengine] How to update my new version of db on server
Hello I need advice. I have application version 1, in her database they is one model: id1 date_1 date_2 int_1 nameemail pass In version 1 I have 6000 input In version 2 I separated model in two parts id1 date_1 name email pass id2 id1 int_1 date_2 I want put my version 2 in production on server to replace version 1 Was is the best (and safe) method? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~--~~~~--~~--~--~---
