Re: [google-appengine] Re: Using @ElementCollection to persist a Collection of Enum
Hi Roberto,
@ElementCollection annotation have to be used to contain embedded entities,
therefore you're have to be sure that PositioningType class is annotated
with @Embeddable.
The next example works fine for me:
//Class Product
@ElementCollection(fetch = FetchType.EAGER)
public SetRate rates;
//Class Rate
@Embeddable
public class Rate {
public String name;
}
Regards.
2012/8/30 roberto_sc roberto.cal...@gmail.com
No opinions at all? Does it look like that I'm doing the right thing?
I just found out that it also doesn't work for a list of integers,
possibly any collection of any simple type:
@ElementCollection
@Extension(vendorName = datanucleus, key = gae.unindexed, value = true)
//private ListPositioningType bestPositionings = new
ArrayListPositioningType();
private ListInteger bestPositionings;
Results in:
Caused by: org.datanucleus.exceptions.NucleusUserException: The MetaData for
the element class java.lang.Integer of the collection field
com.olympya.datamodel.model.Player.bestPositionings was not found.
at
com.google.appengine.datanucleus.scostore.AbstractFKStore.init(AbstractFKStore.java:120)
at
com.google.appengine.datanucleus.scostore.FKListStore.init(FKListStore.java:83)
at
com.google.appengine.datanucleus.DatastoreManager.newFKListStore(DatastoreManager.java:472)
at
org.datanucleus.store.mapped.MappedStoreManager.getBackingStoreForCollection(MappedStoreManager.java:798)
at
org.datanucleus.store.mapped.MappedStoreManager.getBackingStoreForField(MappedStoreManager.java:709)
at org.datanucleus.store.types.sco.backed.ArrayList.init(ArrayList.java:99)
:(
Em quarta-feira, 29 de agosto de 2012 13h46min03s UTC-3, roberto_sc
escreveu:
I'm moving from JPA 1 to JPA 2 in my Gooogle App Engine project, and for
that I changed the annotations for collections of enums, like this case:
// @OneToMany(cascade = CascadeType.ALL) // JPA 1
@ElementCollection(targetClass**=PositioningType.class)
private ListPositioningType bestPositionings;
PositioningType is an enum that is not annotated.
That code is giving me the following exception:
javax.persistence.PersistenceE**xception: The MetaData for the element class
com.olympya.datamodel.model.**PositioningType of the collection field
com.olympya.datamodel.model.**Player.bestPositionings was not found.
at
org.datanucleus.api.jpa.Nucleu**sJPAHelper.getJPAExceptionForN**ucleusException(NucleusJPAHelp**er.java:302)
at
org.datanucleus.api.jpa.JPAEnt**ityTransaction.commit(JPAEntit**yTransaction.java:122)
at com.olympya.Services.mergeUser**(Services.java:102)
...
Caused by: org.datanucleus.exceptions.Nuc**leusUserException: The MetaData
for the element class com.olympya.datamodel.model.**PositioningType of the
collection field com.olympya.datamodel.model.**Player.bestPositionings was
not found.
at
com.google.appengine.datanucle**us.scostore.AbstractFKStore.i**nit(AbstractFKStore.java:120)
at
com.google.appengine.datanucle**us.scostore.FKListStore.init**(FKListStore.java:83)
at
com.google.appengine.datanucle**us.DatastoreManager.newFKListS**tore(DatastoreManager.java:472**)
at
org.datanucleus.store.mapped.M**appedStoreManager.getBackingSt**oreForCollection(MappedStoreMa**nager.java:798)
at
org.datanucleus.store.mapped.M**appedStoreManager.getBackingSt**oreForField(MappedStoreManager**.java:709)
at
org.datanucleus.store.types.sc**o.backed.ArrayList.init(Arra**yList.java:99)
at sun.reflect.NativeConstructorA**ccessorImpl.newInstance0(Nativ**e Method)
...
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Re: [google-appengine] Services in App Engine
Hi, A very nice tool for developing services over appengine in java is playframework. It has a module to work on appengine and for persistence layer I like siena module. You can use another orm like objetify but to start quickly siena is better. Regards El 27/08/2012 20:30, YulianaGH ygar...@adquem.com escribió: Hello, I wonder how to implement services on App engine, using the Java language. If existing a API, someone that a give me a procedure or example for implement in a simple projec. Thanks Sorry for my english. -- 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/-/WWhdF6A3D_cJ. 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. -- 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.
Re: [google-appengine] Please Help! Backend restarts every few hours
Hi, Safely you've exceed the backend's memory. 2011/11/18 Andrius A andriu...@gmail.com I am running backend started by the task which starts a loop within a backend to keep it running. I am constantly seeing backend restarting recently, no exceptions visible on the logs apart from these errors: 1. 2011-11-18 09:36:38.480 /app/executor/master/ 500 3654275ms 0kb instance=0 AppEngine-Google; (+http://code.google.com/appengine) 0.1.0.2 - - [18/Nov/2011:01:36:38 -0800] POST /app/executor/master/ HTTP/1.1 500 0 http://0.master-executor.xxx.appspot.com/_ah/start; AppEngine-Google; (+http://code.google.com/appengine) master-executor.xxx.appspot.com ms=3654275 cpu_ms=5810488 api_cpu_ms=3602612 cpm_usd=100.072612 queue_name=master-executor-queue task_name=master-executor-job-1321599921 exit_code=109 instance=0 2. E2011-11-18 09:36:37.596 Connection to client lost. What does exit_code=109 means? Thanks for your help! -- 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. -- 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.
Re: [google-appengine] Error 500
I've been getting a lot of 500 errors too. Eduardo 2011/5/5 Francois Masurel f.masu...@gmail.com Getting quite a few 500 errors today. Am I the only one ? Francois -- 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. -- 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.
Re: [google-appengine] Re: Instances
Hi Robert, After all, thank you for your recomendation of use Appstats. I'm going to use it. Undeploy application doesn't mean lose an instance because I see a lots of loading request in my logs. We've developed a warm up servlet to start up the application into dynamic instances when I've activated always on feature. But we've detected into always on instances that the application is shutting down too. Also I think the algorithm for dispatching requests between instances is Round Robin and when we haven't got requests enough. So we've got a lot of loading requests because the time between requests into the same instance is long enough to shut down the application for appengine. Eduardo. 2011/5/4 Robert Kluin robert.kl...@gmail.com Hi Eduardo, It sounds like you might benefit from using Appstats. I've heard Java apps tend to have large startup times. However, from what you're describing it sounds like your app is getting new instances spun up (16 in total) but it is not serving requests quickly enough. At least if I understand the issues correctly. http://code.google.com/appengine/docs/java/tools/appstats.html When you say 'undeploy' the application, you mean you lose an instance? As in you go from, say, 16 to 15 instances? Also what Geoffrey said is correct (of course ;), only active instances are listed. Instances can be spun up and down at any time. Do you see lots of loading requests in your logs? Robert On Tue, May 3, 2011 at 13:05, Eduardo Perrino eduardo.perr...@gmail.com wrote: 2011/5/3 Geoffrey Spear geoffsp...@gmail.com On May 3, 11:55 am, Eduardo Perrino eduardo.perr...@gmail.com wrote: Hi Robert, I try to explain better: Our application has 16 instances assigned by appengine automatically and three of them are always on. It doesn't have many requests, in fact, the time between them is large enough to appengine undeploy the application. So appengine is starting the application over and over. If the Instances section of the control panel shows that you currently have 16 instances, that's how many copies of your application are currently running. Instances that are undeployed, as you put it, won't show in that panel. This is not true, because sometimes when an instance has received a request the latency time is increased very much and if you go to the logs section it's posible to see that the application has been started. I think, see the instances is not mean that the application is started. -- 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. -- 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. -- 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. -- 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.
Re: [google-appengine] Instances
Thank you!! But we are using now concurrent requests and the problem persists. 2011/5/4 Stephen sdeasey+gro...@gmail.com Try this: http://code.google.com/appengine/docs/java/config/appconfig.html#Using_Concurrent_Requests Hopefully you will end up with fewer, warmer instances. -- 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. -- 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] Instances
Hi!! We have problems with the instance feature of appengine. Today we have got 16 instances, and we've detected that many of them when receive a request, it has to start the application again. So our application consumes a lot of cpu because our startup process is a little heavy. To solve this situation we've enabled always on feature, and the problem becomes bigger, because always on instances has to start the application too. We don't understand this behavior and we need help to solve this. Otherwise we'll have to stop using appengine as a valid JAVA development platform because stop and start in every moment the application is unacceptable into this enviroment. Eduardo -- 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.
Re: [google-appengine] Instances
Hi Robert, I try to explain better: Our application has 16 instances assigned by appengine automatically and three of them are always on. It doesn't have many requests, in fact, the time between them is large enough to appengine undeploy the application. So appengine is starting the application over and over. Our application is java based and we're using spring MVC, Security, IoC and AOP, we've optimized the startup of it to reduce this time, more or less the startup time is not exceed more than 15 seconds. I've attached screenshot to show the instances's status. Thanks for your interesting. Eduardo. 2011/5/3 Robert Kluin robert.kl...@gmail.com Hi Eduardo, Perhaps you could explain we've detected that many of them when receive a request, it has to start the application again more precisely. It is rather hard to give any advise other than make your app startup faster based on the information you've provided (for me at least). Also, if you don't get any good insights here, try searching / asking on the google-appengine-java group. Robert On Tue, May 3, 2011 at 09:59, Eduardo Perrino eduardo.perr...@gmail.com wrote: Hi!! We have problems with the instance feature of appengine. Today we have got 16 instances, and we've detected that many of them when receive a request, it has to start the application again. So our application consumes a lot of cpu because our startup process is a little heavy. To solve this situation we've enabled always on feature, and the problem becomes bigger, because always on instances has to start the application too. We don't understand this behavior and we need help to solve this. Otherwise we'll have to stop using appengine as a valid JAVA development platform because stop and start in every moment the application is unacceptable into this enviroment. Eduardo -- 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. -- 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. -- 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.
Re: [google-appengine] Re: Instances
2011/5/3 Geoffrey Spear geoffsp...@gmail.com On May 3, 11:55 am, Eduardo Perrino eduardo.perr...@gmail.com wrote: Hi Robert, I try to explain better: Our application has 16 instances assigned by appengine automatically and three of them are always on. It doesn't have many requests, in fact, the time between them is large enough to appengine undeploy the application. So appengine is starting the application over and over. If the Instances section of the control panel shows that you currently have 16 instances, that's how many copies of your application are currently running. Instances that are undeployed, as you put it, won't show in that panel. This is not true, because sometimes when an instance has received a request the latency time is increased very much and if you go to the logs section it's posible to see that the application has been started. I think, see the instances is not mean that the application is started. -- 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. -- 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] google api client and google url shortener
Hi, I'm using google-api-java-client-1.3.2-alpha to use google's url shortener api. I've configured correctly the api in the console api and I'm using the api without problems in development server. But when I deploy the aplication into appengine production enviroment and I try to use the api I receive a 403 http error code from the api. I need help to fix the problem. Thanks!! Regards. Eduardo Perrino -- 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.
Re: [google-appengine] Re: Request was aborted after waiting too long to attempt to service your request
My cron runs every minute because it is the minimal period that gae supports. 2010/6/16 Tristan tristan.slomin...@gmail.com From my understanding this error happens when a request hits an application instance but is put on a queue and becomes stale before other requests in front of it get out of the way and execute. Doesn't your cron job have to fire every second in order to keep the application alive? I thought that 1 request per second is the keep- alive boundary. It's somewhere around there. How often does your cron execute? On Jun 16, 5:51 am, Eduardo Perrino eduardo.perr...@gmail.com wrote: I need help my application show the next error: Request was aborted after waiting too long to attempt to service your request. This may happen sporadically when the App Engine serving cluster is under unexpectedly high or uneven load. If you see this message frequently, please contact the App Engine team. I created a cron job to keep alive the application, but the error persits, i need help to fix it. Thanks -- 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-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.comgoogle-appengine%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en. -- 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-appeng...@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 was aborted after waiting too long to attempt to service your request
I need help my application show the next error: Request was aborted after waiting too long to attempt to service your request. This may happen sporadically when the App Engine serving cluster is under unexpectedly high or uneven load. If you see this message frequently, please contact the App Engine team. I created a cron job to keep alive the application, but the error persits, i need help to fix it. Thanks -- 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-appeng...@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.
