[appengine-java] two entities into the same entity group - unowned relationship
I have two classes with unowned relationship. I am making tenant key as a
key field in the MasterUserLogin. How can I make them belong to the same
entity group
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Tenant {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
@Extension(vendorName = datanucleus, key=gae.encoded-pk,
value=true)
private String id;
@Persistent
@Extension(vendorName = datanucleus, key=gae.pk-name, value=true)
private String name;
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class MasterUserLogin {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private String id;
@Persistent
private Key currentTenantKey;
}
Regards
-Aswath
--
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: JDO Query limit? 1000?
Stephen, you're right. I tested setRange(1200, 1500) and I get an exception. I'd like to understand more about that. Why datastore limits the first parameter (skip) and not also the second? I was thinking that the limit of a query was 1000 items. I was wrong. So, I can get 5000 items with problem, but I cannot skip the first 1000. Quite strange... IMHO fabrizio On Dec 17, 10:39 pm, stephenp slpe...@gmail.com wrote: He meant setRange(1001, 2000) will fail. Datastore will only let you skip the first 1000. If you try to skip past more than 1000 you'll get an error. In your code, you're only skipping the first 10 setRange (10,1500). Stephen -- 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] Meassuring Loading Request
On http://code.google.com/intl/nl/appengine/kb/java.html#performance there is info how to write a listener to log loading requests. Would it also be possible to log how much time a loading request caused? -- 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] BlobStore not just jclouds anymore
Glad to see google appengine has a blob store. Mildly annoying that it uses the same name as the jclouds blobstore api, as it will make code confusing. At least you lowercased the 's' in store :p If you'd like to see the first blobstore in google appengine, have a look here: http://anyweight.blogspot.com/2009/10/save-your-tweets-forever-with-jclouds.html I suppose we'll look into adding google Blobstore to our BlobStore soon ;) Cheers, Adrian jclouds: open source cloud integration framework http://code.google.com/p/jclouds/ -- 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: Is it possible to store ContactEntrys in the appengine datastore?
http://code.google.com/appengine/docs/java/datastore/dataclasses.html#Serializable_Objects Serializable objects can be stored as a field of an entity using @Persistent(serialized=true). However, the GData ContactEntry object does not appear to be marked as serializable, so you will probably have to create your own custom contact information class and convert between the two classes. Andy On Dec 17, 7:19 pm, Tb tho...@bertranfamily.com wrote: Any update on this? I'm getting the same error while trying to store a ContactEntry object per record... However, I don't mind storing an ArrayList if we can solve your problem! ;) On Dec 9, 9:38 am, Josh joshua.t.gr...@gmail.com wrote: One other thing I should add. The ContactEntrys are currently stored in an ArrayList. I'm trying to persist the whole list. -- 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: Web API Development Hosting
http://wikis.sun.com/display/Jersey/Overview+of+JAX-RS+1.0+Features I'm using JAX-RS (Jersey 1.1.5 version) to provide clients with a GData/AtomPub style REST api to their data stored in the App Engine datastore, allowing both XML and JSON CRUD requests to GET, POST, PUT, DELETE data. (Though you may find Restlet a bit easier to use out of the box with Google App Engine at http://www.restlet.org/downloads/testing as you certainly need to use the latest versions of Jersey for it to work.) So, yes, you can produce a web api, and it should be an appropriate platform using Google App Engine. It's really deciding which Java REST or web service framework you like best. Then it's just the same process as building a public facing web application. If your API is allowing bulk updates, then there are existing posts to this group discussing using the Task Queue to keep operation times down. Andy On Dec 17, 5:39 pm, Prashant Gupta nextprash...@gmail.com wrote: Hi, I was thinking of developing a web api which will allow web apps to read or put some data from/to my app. I am not sure what I exactly want to do because I am not sure how a web API is developed what are the limitations, is it same as we write an app? ok, that was a stupid question. I tried to search some text which could help me get some tips or ideas on web api development but I couldn't find any :( . I would be thankful if you guys help me find out some text which could help me with this. Secondly, I was wondering if App Engine is the right place to host a web api? Experts please comment on this. Thanks. -- 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: select count(*) ?
I second this question. Jorge Gonzalez On Dec 2, 1:19 pm, king kingalpha...@gmail.com wrote: Jason, do you have a timeline for when: 1. the cursor feature will be available? 2. the data download feature be available for JAVA (not Python). On Oct 21, 10:54 am, Jason (Google) apija...@google.com wrote: The query restrictions are an artifact of the way App Engine's datastore is constructed, which makes certain operations (e.g. queries and reads) very fast and scalable but does limit the types of queries you can make, though you can typically get around these restrictions by re-thinking your model a bit. We are working on adding built-in cursor support for easier paging through entities and have just added a datastore statistics API for, among other things, getting the total entity count, even if it exceeds 1,000. More details here: http://code.google.com/appengine/docs/java/datastore/stats.html And we also have a data export utility included with the SDK to make it easier for you to back up or even move off of App Engine should you choose to, and we're continuing to look at ways of making App Engine, particularly the datastore component, easier to use. http://code.google.com/appengine/docs/python/tools/uploadingdata.html... - Jason On Mon, Oct 19, 2009 at 1:53 PM, vetch oldpete...@gmail.com wrote: On 6 Paź, 10:03, Jason (Google) apija...@google.com wrote: * Because App Engine queries can only return up to 1,000 results, count(this) will never return above 1,000, even if you have more than 1,000 entities, so bear this in mind. I'm deeply shocked. This works like some black hole. You put your data there simply, but can't get them back that simply. In connection with restricions (inequality property filter), it is even harder to get anything more complex. BiGAppEngine disappointment. -- 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: Retrieving an entity using a different key type than the key field in the class
On 17 Dez., 23:11, Ikai L (Google) ika...@google.com wrote: When you say it doesn't work, do you mean that it does not retrieve the entity? right, no entity was found. Can you try creating a Key with the id instead of passing the ID directly? http://code.google.com/appengine/docs/java/javadoc/com/google/appengi... That is, try KeyFactory.createKey(myEntity.class.getName(), keyId); I tried that out and received a javax.jdo.JDOFatalUserException: Exception converting com.myclass (agh0ZXN0NDcxM3IWCxIGV2luZXJ5GAEMCxIEV2luZRgCDA) to an internal key. at org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManager.getObjectById (DatastoreJDOPersistenceManager.java:66) at org.datanucleus.jdo.JDOPersistenceManagerProxy.getObjectById (JDOPersistenceManagerProxy.java:373) thanks for your support -- 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: Unable to add another admin account
I tried the second link but instead of adding new developer to the exising app there was only option for adding new app and I did it. Is it possible to add new 'user/developer/email' to the existing application if the email is in domain handled by Google Apps? Cheers, Lukasz -- 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] Google Calendar log on GAE: Redirect requested but followRedirects is disabled
I have the following code snippets (remove exceptions code for
brevity) which is based on the example on
http://code.google.com/apis/calendar/data/2.0/developers_guide_java.html#RetrievingAllCalendars
String appName = companyName-appName-1.0;
CalendarService myService = new CalendarService
(appName);
String id = myEmail;
String password = myPassword;
String host = http://www.google.com/calendar/feeds/;
+ id + @gmail.com/owncalendars/full;
myService.setUserCredentials(id, password);
URL feedUrl = new URL(host);
CalendarFeed resultFeed = myService.getFeed(feedUrl,
CalendarFeed.class);
for (int i = 0; i resultFeed.getEntries().size(); i++) {
entry = resultFeed.getEntries().get(i);
logger.info(entry.getTitle().getPlainText())
}
I receive the following log info:
Dec 18, 2009 3:25:34 PM
org.apache.commons.httpclient.HttpMethodDirector isRedirectNeeded
INFO: Redirect requested but followRedirects is disabled
Dec 18, 2009 3:25:35 PM org.apache.commons.httpclient.HttpMethodBase
getResponseBody
WARNING: Going to buffer response body of large or unknown size. Using
getResponseBodyAsStream instead is recommended.
Dec 18, 2009 3:25:35 PM com.galensystems.pchr.server.DoServer
doCalendar
INFO: myem...@gmail.com
I am wondering if I am doign something wrong and have to worry the
above INFO and WARNING.
--
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] BlobstoreService limited by serve() / Feature request for get()
App Engine team: Thanks for introducing BlobstoreService. It looked like it was going to solve a major impediment in an application I am prototyping, but I hit the wall (again) with only being able to regurgitate blobs during an http response, and not do anything useful with them in the cloud. I am using BlobstoreService to upload and store serialized spatial indexes. I want to be able to query them with point geometry, but once they are in the store there is no way for me to fetch them again within the context of my application. I can delete(key) in an application context, and serve(key) them directly back to the browser, but I cannot fetch them from the blobstore and operate on them, which is exactly what I need to do in my app. For a minute I was tricked into thinking that I could use the URL Fetch API from within my app, since serve(key) pumps out the data in response to a get call. But an internal URL Fetch is also limited to 1MB, and I receive the dreaded: The response from url http://localhost:/serve/blob?blob-key=2rdXcmNBIZz3_mDE8msbXg was too large. (Of course, if I just hit that same URL in my browser, I download the data just fine -- its just within a programmatic App Engine context that I cannot fetch that URL.) All I want for Christmas is my two front teeth. In this case, the teeth are either or both of the following hooks: 1) New URL Fetch API feature realizes that it is calling the BlobstoreService, and lets data 1MB pass through. Since BlobstoreService is handling the response internally, add an extra header that URL Fetch understands to lift the size limit restriction. You could even restrict this to only allow URL Fetch of blobs in the same App Engine application. 2) Expose a BlobstoreService.get(BlobKey key) method so applications can fetch blobs after they are stored and do something useful with them -- like geospatial operations on spatial index blobs, or opening stored zip archives and processing contents with task queues. No worries if people go blob crazy -- billing is turned on, and real fancy querying needs to be done with basic datastore entities anyways. Please consider one or both of these options. Option #2 sounds like a no-brainer to me, because somewhere under the serve() hood you must be fetching the blob by key already. Stuart -- 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] maven-gae-plugin 0.4.2
maven-gae-plugin 0.4.2 has just been released (http://code.google.com/ p/maven-gae-plugin) The main features are upgraded/cleaned dependencies, also there are couple of small bug fixes. You can check the GWT example project (uses GAE 1.3.0 and GWT 1.7.1). Running hosted mode from maven should be possible after gwt-maven- plugin's 1.2 version is released (http://jira.codehaus.org/browse/ MGWT-112) (or you can try building it's 1.2-SNAPSHOT yourself). Combining maven-gae-plugin with Google Eclipse plug-in might be possible, if you put war directory in your project root, but I haven't tested this yet. (See following thread: http://groups.google.com/group/google-appengine-java/browse_thread/thread/ebfd891f84591432) -- 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: BlobstoreService limited by serve() / Feature request for get()
Added as feature request: http://code.google.com/p/googleappengine/issues/detail?id=2536 http://code.google.com/p/googleappengine/issues/detail?id=2536Stuart On Fri, Dec 18, 2009 at 11:16 AM, Stuart Moffatt stuartmoff...@gmail.comwrote: App Engine team: Thanks for introducing BlobstoreService. It looked like it was going to solve a major impediment in an application I am prototyping, but I hit the wall (again) with only being able to regurgitate blobs during an http response, and not do anything useful with them in the cloud. I am using BlobstoreService to upload and store serialized spatial indexes. I want to be able to query them with point geometry, but once they are in the store there is no way for me to fetch them again within the context of my application. I can delete(key) in an application context, and serve(key) them directly back to the browser, but I cannot fetch them from the blobstore and operate on them, which is exactly what I need to do in my app. For a minute I was tricked into thinking that I could use the URL Fetch API from within my app, since serve(key) pumps out the data in response to a get call. But an internal URL Fetch is also limited to 1MB, and I receive the dreaded: The response from url http://localhost:/serve/blob?blob-key=2rdXcmNBIZz3_mDE8msbXg was too large. (Of course, if I just hit that same URL in my browser, I download the data just fine -- its just within a programmatic App Engine context that I cannot fetch that URL.) All I want for Christmas is my two front teeth. In this case, the teeth are either or both of the following hooks: 1) New URL Fetch API feature realizes that it is calling the BlobstoreService, and lets data 1MB pass through. Since BlobstoreService is handling the response internally, add an extra header that URL Fetch understands to lift the size limit restriction. You could even restrict this to only allow URL Fetch of blobs in the same App Engine application. 2) Expose a BlobstoreService.get(BlobKey key) method so applications can fetch blobs after they are stored and do something useful with them -- like geospatial operations on spatial index blobs, or opening stored zip archives and processing contents with task queues. No worries if people go blob crazy -- billing is turned on, and real fancy querying needs to be done with basic datastore entities anyways. Please consider one or both of these options. Option #2 sounds like a no-brainer to me, because somewhere under the serve() hood you must be fetching the blob by key already. Stuart -- 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: BlobstoreService limited by serve() / Feature request for get()
Users interested in better BlobstoreService, please star the issue so it gets more attention: http://code.google.com/p/googleappengine/issues/detail?id=2536 Stuart On Fri, Dec 18, 2009 at 11:23 AM, Stuart Moffatt stuartmoff...@gmail.comwrote: Added as feature request: http://code.google.com/p/googleappengine/issues/detail?id=2536 http://code.google.com/p/googleappengine/issues/detail?id=2536Stuart On Fri, Dec 18, 2009 at 11:16 AM, Stuart Moffatt stuartmoff...@gmail.comwrote: App Engine team: Thanks for introducing BlobstoreService. It looked like it was going to solve a major impediment in an application I am prototyping, but I hit the wall (again) with only being able to regurgitate blobs during an http response, and not do anything useful with them in the cloud. I am using BlobstoreService to upload and store serialized spatial indexes. I want to be able to query them with point geometry, but once they are in the store there is no way for me to fetch them again within the context of my application. I can delete(key) in an application context, and serve(key) them directly back to the browser, but I cannot fetch them from the blobstore and operate on them, which is exactly what I need to do in my app. For a minute I was tricked into thinking that I could use the URL Fetch API from within my app, since serve(key) pumps out the data in response to a get call. But an internal URL Fetch is also limited to 1MB, and I receive the dreaded: The response from url http://localhost:/serve/blob?blob-key=2rdXcmNBIZz3_mDE8msbXg was too large. (Of course, if I just hit that same URL in my browser, I download the data just fine -- its just within a programmatic App Engine context that I cannot fetch that URL.) All I want for Christmas is my two front teeth. In this case, the teeth are either or both of the following hooks: 1) New URL Fetch API feature realizes that it is calling the BlobstoreService, and lets data 1MB pass through. Since BlobstoreService is handling the response internally, add an extra header that URL Fetch understands to lift the size limit restriction. You could even restrict this to only allow URL Fetch of blobs in the same App Engine application. 2) Expose a BlobstoreService.get(BlobKey key) method so applications can fetch blobs after they are stored and do something useful with them -- like geospatial operations on spatial index blobs, or opening stored zip archives and processing contents with task queues. No worries if people go blob crazy -- billing is turned on, and real fancy querying needs to be done with basic datastore entities anyways. Please consider one or both of these options. Option #2 sounds like a no-brainer to me, because somewhere under the serve() hood you must be fetching the blob by key already. Stuart -- 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: eclipse plugin and maven?
Thanks for the response drone. We are trying to determine what we can do to make this smoother. I think that a lot of people would like to see the plugin relax the war folder constraint. Specifically allowing a user to specify an arbitrary path to their war folder. On Fri, Dec 18, 2009 at 11:06 AM, drone andr...@gmail.com wrote: 1. It appears, that it is possible to specify SDK location (at least in latest) Google Eclipse plugin. So you could make maven to download the whole SDK zip to it's repository and configure Eclipse plugin to use it from there. 3. This might not be true - it seems that gwt has finally made it to the official repository: http://repo2.maven.org/maven2/com/google/gwt/ the 2. point however is still true and this is the main problem with Google Eclipse plugin. however it should be possible to configure maven to work with war directory in root.. (which is awful, i know..) I haven't tried this configuration yet, but it seems to me, that this should work. I will try to come up with an example project, where this is done. On Dec 15, 8:16 pm, Miguel Méndez mmen...@google.com wrote: Here are somethings, that I'm aware of, that make it hard to use maven and the Google Plugin for Eclipse together: 1. Require users to use an SDK (classpath container in eclipse) instead of regular jars 2. Force the war directory to be named war and appear at the project root 3. No official GWT artifact maven repository On Mon, Dec 14, 2009 at 4:35 AM, drone andr...@gmail.com wrote: Regarding maven-gae-plugin - for now, the best way to adopt your application is to copy/paste pom parts from one of the example projects (plain jsp or gwt). It's not trivial, but not impossible. Also I tried to document every piece of pom.xml there. However it is true, that this plugin has become a bit stale.. on my part it's mostly because newer google appengine artifacts did not appear in google-maven-repository. I see now, that they can be found inhttp://www.mvnsearch.org/maven2/ repository, so I will try updating maven-gae-plugin as soon as I have some free time. Also - gwt example is to be updated to use codehaus plugin (mojo.codehaus.org/gwt-maven-plugin) instead of gwt-maven (code.google.com/p/gwt-maven/). On Dec 13, 6:48 am, Yoichi takayama.yoi...@gmail.com wrote: Google App Engine has a Maven Plugin project. http://code.google.com/p/maven-gae-plugin/ Unfortunately there is no manual and I can't figure out how to use it, what else may be necessary, how to configure them, what's the relationship with Apache Eclipse Maven plugins. There are sample Project trees from the Web site. However, that is not enough. E.g. I can't see any new menu option to create and manage GAE Maven project, etc. For example, the GAE Maven Plugin should add a new Archtype in the Maven Plugin's Prlject creation menu. It seems this is not the case. Yoichi -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com google-appengine-java%2bunsubscr...@googlegroups.comgoogle-appengine-java%252bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Miguel -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- Miguel -- 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] Can I make GAE send an e-mail with Resent-To header ?
I'd like to make an e-mail forward by GAE with Resent-To/Resent-From header. I tried the client Java program with JavaMail that I made, and got the suitable result. I applied ... mail.host: smtp.gmail.com mail.smtp.auth: true mail.smtp.socketFactory.port: 465 mail.smtp.starttls.enable:true ...and more... and Message Header is ... Resent-From ; xxxresentf...@aaa.com// my admin account Resent-To : xxxresen...@bbb.com Resent-Date: Mon, 30 Nov 2009 12:59:59 + // Exactly now From: yyyf...@ccc,com To: yy...@ddd.com Date: Sun, 01 Nov 2009 12:59:59 + // Past date so, the result was good (It was just what I had expected). The response header is above. An e-mail looks like -- comming from yyyf...@ccc,com. -- comming at 01 Nov 2009. -- going to yy...@ddd.com, but he(yy...@ddd.com) didn't get this e-mail, but another(xxxresen...@bbb.com) got this mail. Then I tried that I implemented above code and a few fixed code, and deployed on GAE, ran this application on GAE, but it left log as warnings as follows. Failed: Send failure (javax.mail.MessagingException: Illegal Arguments (java.lang.IllegalArgumentException: Unauthorized Sender: Unauthorized sender)) or Failed: Unable to locate provider for protocol: smtp or Failed: Illegal Arguments (java.lang.IllegalArgumentException: Bad Request: Missing recipients) Does anyobody know a solution to this ? What I want to do is to function Resent-To/Resent-From header appropriately ! Thanks, -- 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: Google Calendar log on GAE: Redirect requested but followRedirects is disabled
I have just compiled and executed the Google Calendar sample from
http://code.google.com/p/gdata-java-client/downloads/list (version
1.40.1) locally without using any GAE stuffs. EventFeedDemo.java
private static void printUserCalendars(CalendarService service)
throws IOException, ServiceException {
// Send the request and receive the response:
CalendarFeed resultFeed = service.getFeed(metafeedUrl,
CalendarFeed.class);
System.out.println(Your calendars:);
System.out.println();
for (int i = 0; i resultFeed.getEntries().size(); i++) {
CalendarEntry entry = resultFeed.getEntries().get(i);
System.out.println(\t + entry.getTitle().getPlainText());
}
System.out.println();
}
It prints 2 calendars. On the other hand, using similar code but
running on GAE, it returns only 1 calendar.
I am using GAE 1.3.
On Dec 18, 7:46 am, Pion onlee2...@gmail.com wrote:
I have the following code snippets (remove exceptions code for
brevity) which is based on the example
onhttp://code.google.com/apis/calendar/data/2.0/developers_guide_java.h...
String appName = companyName-appName-1.0;
CalendarService myService = new CalendarService
(appName);
String id = myEmail;
String password = myPassword;
String host = http://www.google.com/calendar/feeds/;
+ id + @gmail.com/owncalendars/full;
myService.setUserCredentials(id, password);
URL feedUrl = new URL(host);
CalendarFeed resultFeed = myService.getFeed(feedUrl,
CalendarFeed.class);
for (int i = 0; i resultFeed.getEntries().size(); i++) {
entry = resultFeed.getEntries().get(i);
logger.info(entry.getTitle().getPlainText())
}
I receive the following log info:
Dec 18, 2009 3:25:34 PM
org.apache.commons.httpclient.HttpMethodDirector isRedirectNeeded
INFO: Redirect requested but followRedirects is disabled
Dec 18, 2009 3:25:35 PM org.apache.commons.httpclient.HttpMethodBase
getResponseBody
WARNING: Going to buffer response body of large or unknown size. Using
getResponseBodyAsStream instead is recommended.
Dec 18, 2009 3:25:35 PM com.galensystems.pchr.server.DoServer
doCalendar
INFO: myem...@gmail.com
I am wondering if I am doign something wrong and have to worry the
above INFO and WARNING.
--
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] embedding parent object in parent-child relation with jdo
I am using the app engine SDK 1.3.0 with the latest Google Eclipse
plugin.
Currently, in order to be able to run queries on attributes of the
parent object I have to embed parent object into a child. So, I have
created the following classes
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Parent {
@PrimaryKey @Persistent String parentName;
@Persistent(mappedBy = parent) ListChild children = new
ArrayListChild();
public Parent(String parentName) { this.parentName = parentName; }
public void setParentName(String parentName) { this.parentName =
parentName; }
public String getParentName() { return parentName; }
public ListChild getChildren() { return children; }
public void addChild(Child child) {
child.setParent(this);
children.add(child);
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Child {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) Key
childKey;
@Persistent String childName;
@Embedded(
members = { @Persistent(name = parentName, column =
childParentName) },
ownerMember = children)
@Persistent Parent parent;
public Child(String childName) { this.childName = childName; }
public void setChildName(String childName) { this.childName =
childName; }
public String getChildName() { return childName; }
public void setParent(Parent parent) { this.parent = parent; }
public Parent getParent() { return parent; }
}
and then I created a simple test to verify if I can persist and run
queries on those objects:
public class ParentTest {
public static void main(String[] args) {
Parent parent1 = new Parent(parent1);
parent1.addChild(new Child(child1));
parent1.addChild(new Child(child2));
Parent parent2 = new Parent(parent2);
parent2.addChild(new Child(child3));
ApiProxy.setEnvironmentForCurrentThread(new TestEnvironment());
ApiProxy.setDelegate(new ApiProxyLocalImpl(new File(.)) { });
ApiProxyLocalImpl proxy = (ApiProxyLocalImpl) ApiProxy.getDelegate
();
proxy.setProperty(LocalDatastoreService.NO_STORAGE_PROPERTY,
Boolean.TRUE.toString());
PersistenceManagerFactory pmf =
JDOHelper.getPersistenceManagerFactory(transactions-optional);
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistent(parent1);
tx.commit();
tx.begin();
pm.makePersistent(parent2);
tx.commit();
Query query2 = pm.newQuery(Child.class);
query2.setFilter(parent.parentName==parentNameParam);
query2.declareParameters(java.lang.String parentNameParam);
ListChild results2 = (ListChild) query2.executeWithArray
(parent1);
System.err.println(results2);
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
}
The DataNucleus Enhancer runs ok on the above code, but when I run
my test app, I am getting an IndexOutOfBoundException from somewhere
in the DataNucleus internals:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException: 0
at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
(DatastoreTable.java:356)
at org.datanucleus.store.appengine.DatastoreTable.buildMapping
(DatastoreTable.java:285)
at org.datanucleus.store.appengine.DatastoreManager.buildStoreData
(DatastoreManager.java:405)
at org.datanucleus.store.appengine.DatastoreManager.newStoreData
(DatastoreManager.java:363)
at org.datanucleus.store.AbstractStoreManager.addClasses
(AbstractStoreManager.java:788)
at org.datanucleus.store.AbstractStoreManager.addClass
(AbstractStoreManager.java:759)
at org.datanucleus.store.mapped.MappedStoreManager.getDatastoreClass
(MappedStoreManager.java:358)
at org.datanucleus.store.appengine.DatastoreManager.getDatastoreClass
(DatastoreManager.java:631)
at
org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer
(DatastoreFieldManager.java:1008)
at
org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer
(DatastoreFieldManager.java:998)
at org.datanucleus.store.appengine.DatastoreFieldManager.init
(DatastoreFieldManager.java:133)
at org.datanucleus.store.appengine.DatastoreFieldManager.init
(DatastoreFieldManager.java:167)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPreProcess
(DatastorePersistenceHandler.java:316)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects
(DatastorePersistenceHandler.java:236)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
(DatastorePersistenceHandler.java:225)
at org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent
(JDOStateManagerImpl.java:3185)
at org.datanucleus.state.JDOStateManagerImpl.makePersistent
(JDOStateManagerImpl.java:3161)
at
Re: [appengine-java] Meassuring Loading Request
All requests have their durations logged in the admin console. Was there something more you wanted than that? On Fri, Dec 18, 2009 at 3:42 AM, Marcel Overdijk marceloverd...@gmail.comwrote: On http://code.google.com/intl/nl/appengine/kb/java.html#performance there is info how to write a listener to log loading requests. Would it also be possible to log how much time a loading request caused? -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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: Meassuring Loading Request
On Fri, Dec 18, 2009 at 3:50 AM, Marcel Overdijk marceloverd...@gmail.comwrote: Now that I'm looking at the example code on http://code.google.com/intl/nl/appengine/kb/java.html#performance to distinguish normal request from loading request I'm wondering if the usage is correct... The example uses a HttpSessionListener but shouldn't this be a ServletContextListener? Yes, thanks for pointing that out. We'll get it fixed. On 18 dec, 09:42, Marcel Overdijk marceloverd...@gmail.com wrote: Onhttp://code.google.com/intl/nl/appengine/kb/java.html#performance there is info how to write a listener to log loading requests. Would it also be possible to log how much time a loading request caused? -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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] Chat Time transcript for December 16, 2009
This past Wednesday, the App Engine team hosted the latest session of its bimonthly IRC office hours. A transcript of the session and a summary of the topics covered is provided below. The next session will take place on Wednesday, January 6th from 7:00-8:00 p.m. PST in the #appengine channel on irc.freenode.net. - Jason --SUMMARY--- - Q: What kind of data redundancy do uploaded files and stored data have and is this redundancy counted towards the Stored Data quota? A: We use GFS for data storage, which has its own redundancy, and we also replicate to multiple datacenters and take backups. The cost of all of this replication is included in the per-gigabyte cost, so you are only charged for one copy of your data plus the indexes needed to query it. [9:02-9:03] - Discussion on feature request (http://code.google.com/p/ googleappengine/issues/detail?id=2377) to add more detail to the App Engine status page and/or create a per-app status page to check whether specific apps are being impacted by a particular issue since not all apps are affected by all issues. Note: we do post planned and unplanned downtime to the downtime-notify mailing list, so please subscribe to http://groups.google.com/group/google-appengine-downtime-notify to receive reminders about planned maintenance and status updates in the event of system issues. [9:04-9:10, 9:16] - Discussion on planned maintenances in general -- every 30-60 days, App Engine enters read-only mode where apps continue serving but the datastore can only be read, not written to. We're working on reducing the occurrences of these planned maintenances as well as the time it takes to complete each one, and will have a calendar set up soon so developers can keep up to date with the maintenance schedule. [9:34-9:39] - Q: Can one achieve better peformance by writing entities in different entity groups outside of a transaction over writing multiple entitites in the same entity group inside of a transaction? A: Yes! App Engine supports batch (parallel) writes for entities in distinct entity groups. Updates to multiple entities in the same entity group, regardless of whether you use transactions, forces the entities to be written serially which takes more time. In order to achieve the best performance, keep your entity groups as small as possible and only use transactions if you absolutely need atomic writes to two or more entities. [9:09-9:11, 9:13-9:15] - Q: Can you map subdomains to versions? A: You can do this right now -- when you deploy a new version, you can access it by hitting version_string.latest.app_id.appspot.com, even if it's not the default version. As of release 1.2.4, App Engine supports wildcard subdomains, which work without any explicit configuration. To determine which subdomain is being used, inspect the 'Host' request header -- see http://googleappengine.blogspot.com/2009/08/new-features-in-124.html. [9:11, 9:14, 9:16, 9:18] - Discussion on feature request to allow app deployment to domains other than appspot.com because of the crowded namespace. Note: App Engine already allows you to deploy your application to any Google Apps domain, so if you don't plan to host directly on appspot.com, a recognizable app ID isn't as important. You can always prefix your own username/alias to any app ID you choose to reduce the possibility that the app ID is taken. [9:16-9:17, 9:21] - Q: Is there any way to query for not null without using an inequality? A: not equal to or != is implemented as two inequality filters, so the answer is no. One workaround is using a calculated property instead -- at write time, determine if a certain property contains a value of interest. If so, store True in a boolean property, False otherwise, then use an equality filter on this boolean property. Or just filter the results in memory. Since empty property values (displayed as missing in the datastore viewer) are not indexed, you can just leave a particular property without a value so when you issue a query that filters on that property, entities with missing values don't get returned as results. You can't currently query on whether a field is empty yet, although you can query on whether a certain property value is null since null is an actual value. [9:19-9:26] - Q: Are there any plans to increase the size of a result set from 1,000? A: No, but datastore cursors, which are on the public roadmap, should make it easier to page through larger result sets. A cursor is an object that points to a particular point in the result set of a query which can be serialized and reconstituted so that you can pick up from where you left off in a query -- essentially, it's an object that helps you page through your result set, even if there are more than 1,000 results. [9:26-9:29] - Q: Are there any limits to the number of blobs you can store using the new Blobstore service? A: No, but space needed for blobs are counted against your storage
[appengine-java] Re: Use Blobstore Java API with GWT
Yes, I did like this and works without problems...thank for the
response!
On 17 Dec, 09:42, Raphael André Bauer raphael.andre.ba...@gmail.com
wrote:
hey henry,
the gwt frontend code looks like java, but it is crosscompiled. that's
the reason why the imports cannot be found - it's technically
something completely different.
so what you have to do is having an RPC call to your server, that
returns a valid form url where you can upload your files.
basically
BlobstoreService blobstoreService =
BlobstoreServiceFactory.getBlobstoreService();
must be in the servlet of your RPC and the value returned by
then you get this url back and add it to your client code
in .setAction
..
hope that helps,
ra
On Thu, Dec 17, 2009 at 12:08 AM, Henry enricrequ...@gmail.com wrote:
Hi Guys,
Im trying to upload images using the new Blobstore API to the app
engine with GWT.
Ive created a FormPanel() to upload the images to the app engine, but
when im trying to set up the action in the form using
BlobstoreService, i cant because the import com.google.appengine
cannot be resolved.
My question is: how can I set up the action on the form using the
BlobstoreService?? I've this code in the client side:
import com.google.appengine.api.blobstore.BlobstoreService;
FormPanel form = new FormPanel();
form.setEncoding(FormPanel.ENCODING_MULTIPART);
form.setMethod(FormPanel.METHOD_POST);
BlobstoreService blobstoreService =
BlobstoreServiceFactory.getBlobstoreService();
form.setAction(blobstoreService.createUploadUrl(handizo/
upload));
error: import com.google.appengine cannot be resolved.
Ive also tried to setup the action without the BlobstoreService, but
when the form is read in the server side using the BlobstoreService:
private BlobstoreService blobstoreService =
BlobstoreServiceFactory.getBlobstoreService();
protected void doPost(HttpServletRequest req, HttpServletResponse
resp)
throws ServletException, IOException {
MapString, BlobKey blobs =
blobstoreService.getUploadedBlobs(req);
BlobKey blobKey = blobs.get(myFile);
if (blobKey == null) {
resp.sendRedirect(/);
} else {
resp.sendRedirect(/serve?blob-key= +
blobKey.getKeyString());
}
I've this other error saying me that I've to set up the action using
the BlobstoreService.
Error: Must be called from a blob upload callback request.
at
com.google.appengine.api.blobstore.BlobstoreServiceImpl.getUploadedBlobs
(BlobstoreServiceImpl.java:97)
at com.handizo.server.service.FileUploadAnnouncementServlet.doPost
(FileUploadAnnouncementServlet.java:23)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
So its possible to user the BlobstoreService with GWT by the moment??
Thanks in advance :-)
--
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
athttp://groups.google.com/group/google-appengine-java?hl=en.
--
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: Is it possible to store ContactEntrys in the appengine datastore?
Yep. Finally came to the same conclusion. Thanks for your reply Andy. On Dec 18, 2:15 am, andy.booth andy.booth...@googlemail.com wrote: http://code.google.com/appengine/docs/java/datastore/dataclasses.html... Serializable objects can be stored as a field of an entity using @Persistent(serialized=true). However, the GData ContactEntry object does not appear to be marked as serializable, so you will probably have to create your own custom contact information class and convert between the two classes. Andy On Dec 17, 7:19 pm, Tb tho...@bertranfamily.com wrote: Any update on this? I'm getting the same error while trying to store a ContactEntry object per record... However, I don't mind storing an ArrayList if we can solve your problem! ;) On Dec 9, 9:38 am, Josh joshua.t.gr...@gmail.com wrote: One other thing I should add. The ContactEntrys are currently stored in an ArrayList. I'm trying to persist the whole list. -- 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: Google Calendar log on GAE: Redirect requested but followRedirects is disabled
By using the appropriate URLs as shown on the example,
// The base URL for a user's calendar metafeed (needs a username
appended).
private static final String METAFEED_URL_BASE = http://
www.google.com/calendar/feeds/;
// The string to add to the user's metafeedUrl to access the event
feed for their primary calendar.
private static final String EVENT_FEED_URL_SUFFIX = /private/full;
I could retrieve the calendars. But the log info messages below still
show:
Dec 18, 2009 3:25:34 PM
org.apache.commons.httpclient.HttpMethodDirector isRedirectNeeded
INFO: Redirect requested but followRedirects is disabled
Dec 18, 2009 3:25:35 PM
org.apache.commons.httpclient.HttpMethodBase getResponseBody
WARNING: Going to buffer response body of large or unknown size.
Using getResponseBodyAsStream instead is recommended.
On Dec 18, 9:44 am, Pion onlee2...@gmail.com wrote:
I have just compiled and executed the Google Calendar sample
fromhttp://code.google.com/p/gdata-java-client/downloads/list(version
1.40.1) locally without using any GAE stuffs. EventFeedDemo.java
private static void printUserCalendars(CalendarService service)
throws IOException, ServiceException {
// Send the request and receive the response:
CalendarFeed resultFeed = service.getFeed(metafeedUrl,
CalendarFeed.class);
System.out.println(Your calendars:);
System.out.println();
for (int i = 0; i resultFeed.getEntries().size(); i++) {
CalendarEntry entry = resultFeed.getEntries().get(i);
System.out.println(\t + entry.getTitle().getPlainText());
}
System.out.println();
}
It prints 2 calendars. On the other hand, using similar code but
running on GAE, it returns only 1 calendar.
I am using GAE 1.3.
On Dec 18, 7:46 am, Pion onlee2...@gmail.com wrote:
I have the following code snippets (remove exceptions code for
brevity) which is based on the example
onhttp://code.google.com/apis/calendar/data/2.0/developers_guide_java.h...
String appName = companyName-appName-1.0;
CalendarService myService = new CalendarService
(appName);
String id = myEmail;
String password = myPassword;
String host = http://www.google.com/calendar/feeds/;
+ id + @gmail.com/owncalendars/full;
myService.setUserCredentials(id, password);
URL feedUrl = new URL(host);
CalendarFeed resultFeed = myService.getFeed(feedUrl,
CalendarFeed.class);
for (int i = 0; i resultFeed.getEntries().size(); i++) {
entry = resultFeed.getEntries().get(i);
logger.info(entry.getTitle().getPlainText())
}
I receive the following log info:
Dec 18, 2009 3:25:34 PM
org.apache.commons.httpclient.HttpMethodDirector isRedirectNeeded
INFO: Redirect requested but followRedirects is disabled
Dec 18, 2009 3:25:35 PM org.apache.commons.httpclient.HttpMethodBase
getResponseBody
WARNING: Going to buffer response body of large or unknown size. Using
getResponseBodyAsStream instead is recommended.
Dec 18, 2009 3:25:35 PM com.galensystems.pchr.server.DoServer
doCalendar
INFO: myem...@gmail.com
I am wondering if I am doign something wrong and have to worry the
above INFO and WARNING.
--
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: Finding abandoned child entities
If you're using com.google.appengine.api.datastore.Key for your primary keys,
it has a getParent() method which returns null when the object doesn't have a
parent. Also, your code is fetching a List of Entity, and Entity also has a
getParent() which returns null if there is no parent.
m seleron wrote:
Sorry, did not have enough explanation.
I corrected it a little.
I think that the method of confirming the parent existence is simple.
It uses Entity#getParent()
How about the following examples?
String parentKindName = parentKind; //Parent Kindname
String kindName = kindName; // Child Kindname
DatastoreService service = DatastoreServiceFactory.getDatastoreService
();
Query query = new Query(kindName);
PreparedQuery pq = service.prepare(query);
ListEntity list = pq.asList(FetchOptions.Builder.withOffset(0));
for (Entity e : list) {
e.getProperty(xx); //get childproperty
//Parent check
PreparedQuery parentPq = service.prepare(new Query
(parentKindName,e.getParent()));
int parentCount = parentPq.countEntities();
if (parentCount == 0){
//abandoned children
}
}
Please try.
Thanks,
seleronm
--
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.
--
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] two entities into the same entity group - unowned relationship
My understanding is that the only way objects can be in the same entity group
with GAE is they have a parent/child relationship (or grandparent/grandchild
etc.).
aswath satrasala wrote:
I have two classes with unowned relationship. I am making tenant key as
a key field in the MasterUserLogin. How can I make them belong to the
same entity group
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Tenant {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
@Extension(vendorName = datanucleus, key=gae.encoded-pk,
value=true)
private String id;
@Persistent
@Extension(vendorName = datanucleus, key=gae.pk-name, value=true)
private String name;
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class MasterUserLogin {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private String id;
@Persistent
private Key currentTenantKey;
}
Regards
-Aswath
--
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.
--
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] embedding parent object in parent-child relation with jdo
Try making the parent's primary key be Key instead of String.
Eugene Kuleshov wrote:
I am using the app engine SDK 1.3.0 with the latest Google Eclipse
plugin.
Currently, in order to be able to run queries on attributes of the
parent object I have to embed parent object into a child. So, I have
created the following classes
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Parent {
@PrimaryKey @Persistent String parentName;
@Persistent(mappedBy = parent) ListChild children = new
ArrayListChild();
public Parent(String parentName) { this.parentName = parentName; }
public void setParentName(String parentName) { this.parentName =
parentName; }
public String getParentName() { return parentName; }
public ListChild getChildren() { return children; }
public void addChild(Child child) {
child.setParent(this);
children.add(child);
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Child {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) Key
childKey;
@Persistent String childName;
@Embedded(
members = { @Persistent(name = parentName, column =
childParentName) },
ownerMember = children)
@Persistent Parent parent;
public Child(String childName) { this.childName = childName; }
public void setChildName(String childName) { this.childName =
childName; }
public String getChildName() { return childName; }
public void setParent(Parent parent) { this.parent = parent; }
public Parent getParent() { return parent; }
}
and then I created a simple test to verify if I can persist and run
queries on those objects:
public class ParentTest {
public static void main(String[] args) {
Parent parent1 = new Parent(parent1);
parent1.addChild(new Child(child1));
parent1.addChild(new Child(child2));
Parent parent2 = new Parent(parent2);
parent2.addChild(new Child(child3));
ApiProxy.setEnvironmentForCurrentThread(new TestEnvironment());
ApiProxy.setDelegate(new ApiProxyLocalImpl(new File(.)) { });
ApiProxyLocalImpl proxy = (ApiProxyLocalImpl) ApiProxy.getDelegate
();
proxy.setProperty(LocalDatastoreService.NO_STORAGE_PROPERTY,
Boolean.TRUE.toString());
PersistenceManagerFactory pmf =
JDOHelper.getPersistenceManagerFactory(transactions-optional);
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistent(parent1);
tx.commit();
tx.begin();
pm.makePersistent(parent2);
tx.commit();
Query query2 = pm.newQuery(Child.class);
query2.setFilter(parent.parentName==parentNameParam);
query2.declareParameters(java.lang.String parentNameParam);
ListChild results2 = (ListChild) query2.executeWithArray
(parent1);
System.err.println(results2);
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
}
The DataNucleus Enhancer runs ok on the above code, but when I run
my test app, I am getting an IndexOutOfBoundException from somewhere
in the DataNucleus internals:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException: 0
at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
(DatastoreTable.java:356)
at org.datanucleus.store.appengine.DatastoreTable.buildMapping
(DatastoreTable.java:285)
at org.datanucleus.store.appengine.DatastoreManager.buildStoreData
(DatastoreManager.java:405)
at org.datanucleus.store.appengine.DatastoreManager.newStoreData
(DatastoreManager.java:363)
at org.datanucleus.store.AbstractStoreManager.addClasses
(AbstractStoreManager.java:788)
at org.datanucleus.store.AbstractStoreManager.addClass
(AbstractStoreManager.java:759)
at org.datanucleus.store.mapped.MappedStoreManager.getDatastoreClass
(MappedStoreManager.java:358)
at org.datanucleus.store.appengine.DatastoreManager.getDatastoreClass
(DatastoreManager.java:631)
at
org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer
(DatastoreFieldManager.java:1008)
at
org.datanucleus.store.appengine.DatastoreFieldManager.buildMappingConsumer
(DatastoreFieldManager.java:998)
at org.datanucleus.store.appengine.DatastoreFieldManager.init
(DatastoreFieldManager.java:133)
at org.datanucleus.store.appengine.DatastoreFieldManager.init
(DatastoreFieldManager.java:167)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPreProcess
(DatastorePersistenceHandler.java:316)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects
(DatastorePersistenceHandler.java:236)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
(DatastorePersistenceHandler.java:225)
at
Re: [appengine-java] com.google.appengine.api.datastore.DatastoreNeedIndexException
If you're deploying a new version that relies on indexes that haven't been built yet, you should be able to deploy this to a non-default version. This way, the indexes get built eventually but your application won't be serving index errors in the meantime. Then, when the indexes are built, make this new version the default to introduce your new functionality. - Jason On Wed, Dec 16, 2009 at 12:11 AM, Dmitry Anipko dmitry.ani...@gmail.comwrote: Jason, thanks for the info, this solved the problem. I've noticed however that the index building can take some time after the application has been deployed - is there any way to control that / prevent the new version of the application from being used if the indices are not ready yet? (Otherwise the app is guaranteed to produce errors if customers start using it when the indices are not yet fully ready) On Tue, Dec 15, 2009 at 4:16 PM, Jason (Google) apija...@google.com wrote: Hi Dmitry. What's your app ID? Indexes are auto-generated by the SDK when you run a query locally that requires a custom index. If you don't run a particular query locally and it uses multiple sort orders or otherwise requires a custom index, then the index won't be generated in datastore-indexes-auto.xml and you'll see an exception in production. You can see which indexes are created and serving for your app by clicking Datastore Indexes in your app's Admin Console. For now, I suggest adding the index definitions contained in your exception to your datastore-indexes.xml file, re-deploying your app, waiting for the indexes to build, and seeing if that fixes your problem. - Jason On Sun, Dec 13, 2009 at 10:00 PM, Dmitry Anipko dmitry.ani...@gmail.com wrote: Hello, our application recently started producing exceptions like: com.google.appengine.api.datastore.DatastoreNeedIndexException: no matching index found.. datastore-index kind=SketchCommandStore ancestor=false source=manual property name=sketchId direction=asc/ property name=orderId direction=asc/ /datastore-index or Server error 1: com.google.appengine.api.datastore.DatastoreNeedIndexException: no matching index found.. datastore-index kind=SketchCommentThread ancestor=true source=manual property name=lastUpdateTimestamp direction=desc/ /datastore-index for different tables in the data store. Our app doesn't use explicit index configuration / don't have datastore-indexes.xml . On the local development server the auto generated xml for these two tables looks like: !-- Indices written at Sun, 13 Dec 2009 23:01:11 UTC -- datastore-indexes !-- Used 1 time in query history -- datastore-index kind=SketchCommentThread ancestor=true source=auto property name=lastUpdateTimestamp direction=desc/ /datastore-index !-- Used 2 times in query history -- datastore-index kind=SketchCommandStore ancestor=false source=auto property name=sketchId direction=asc/ property name=epochDate direction=desc/ /datastore-index /datastore-indexes I wonder if anybody faced similar issues / can shed some light on how to deal with that? Thank you, Dmitry -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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
Re: [appengine-java] Chat Time transcript for December 16, 2009
Regarding the question about better performance by writing entities in different entity groups; that's not an option if you're using JDO is it, doesn't JDO require a transaction around writes? Jason (Google) wrote: This past Wednesday, the App Engine team hosted the latest session of its bimonthly IRC office hours. A transcript of the session and a summary of the topics covered is provided below. The next session will take place on Wednesday, January 6th from 7:00-8:00 p.m. PST in the #appengine channel on irc.freenode.net. - Jason --SUMMARY--- - Q: Can one achieve better peformance by writing entities in different entity groups outside of a transaction over writing multiple entitites in the same entity group inside of a transaction? A: Yes! App Engine supports batch (parallel) writes for entities in distinct entity groups. Updates to multiple entities in the same entity group, regardless of whether you use transactions, forces the entities to be written serially which takes more time. In order to achieve the best performance, keep your entity groups as small as possible and only use transactions if you absolutely need atomic writes to two or more entities. [9:09-9:11, 9:13-9:15] -- 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: embedding parent object in parent-child relation with jdo
It shouldn't be needed, since according to the docs [1], the Key
type is only required to record parent relation in the child.
But I tried it anyways and got pretty much the same exception:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException: 0
at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
(DatastoreTable.java:356)
at org.datanucleus.store.appengine.DatastoreTable.buildMapping
(DatastoreTable.java:285)
at org.datanucleus.store.appengine.DatastoreManager.buildStoreData
(DatastoreManager.java:405)
...
regards,
Eugene
[1]
http://code.google.com/appengine/docs/java/datastore/creatinggettinganddeletingdata.html#Keys
On Dec 18, 2:33 pm, Rusty Wright rwright.li...@gmail.com wrote:
Try making the parent's primary key be Key instead of String.
Eugene Kuleshov wrote:
I am using the app engine SDK 1.3.0 with the latest Google Eclipse
plugin.
Currently, in order to be able to run queries on attributes of the
parent object I have to embed parent object into a child. So, I have
created the following classes
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Parent {
@PrimaryKey @Persistent String parentName;
@Persistent(mappedBy = parent) ListChild children = new
ArrayListChild();
public Parent(String parentName) { this.parentName = parentName; }
public void setParentName(String parentName) { this.parentName =
parentName; }
public String getParentName() { return parentName; }
public ListChild getChildren() { return children; }
public void addChild(Child child) {
child.setParent(this);
children.add(child);
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Child {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) Key
childKey;
@Persistent String childName;
@Embedded(
members = { @Persistent(name = parentName, column =
childParentName) },
ownerMember = children)
@Persistent Parent parent;
public Child(String childName) { this.childName = childName; }
public void setChildName(String childName) { this.childName =
childName; }
public String getChildName() { return childName; }
public void setParent(Parent parent) { this.parent = parent; }
public Parent getParent() { return parent; }
}
and then I created a simple test to verify if I can persist and run
queries on those objects:
public class ParentTest {
public static void main(String[] args) {
Parent parent1 = new Parent(parent1);
parent1.addChild(new Child(child1));
parent1.addChild(new Child(child2));
Parent parent2 = new Parent(parent2);
parent2.addChild(new Child(child3));
ApiProxy.setEnvironmentForCurrentThread(new TestEnvironment());
ApiProxy.setDelegate(new ApiProxyLocalImpl(new File(.)) { });
ApiProxyLocalImpl proxy = (ApiProxyLocalImpl) ApiProxy.getDelegate
();
proxy.setProperty(LocalDatastoreService.NO_STORAGE_PROPERTY,
Boolean.TRUE.toString());
PersistenceManagerFactory pmf =
JDOHelper.getPersistenceManagerFactory(transactions-optional);
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistent(parent1);
tx.commit();
tx.begin();
pm.makePersistent(parent2);
tx.commit();
Query query2 = pm.newQuery(Child.class);
query2.setFilter(parent.parentName==parentNameParam);
query2.declareParameters(java.lang.String parentNameParam);
ListChild results2 = (ListChild) query2.executeWithArray
(parent1);
System.err.println(results2);
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
}
The DataNucleus Enhancer runs ok on the above code, but when I run
my test app, I am getting an IndexOutOfBoundException from somewhere
in the DataNucleus internals:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException: 0
at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
(DatastoreTable.java:356)
at org.datanucleus.store.appengine.DatastoreTable.buildMapping
(DatastoreTable.java:285)
at org.datanucleus.store.appengine.DatastoreManager.buildStoreData
(DatastoreManager.java:405)
at org.datanucleus.store.appengine.DatastoreManager.newStoreData
(DatastoreManager.java:363)
at org.datanucleus.store.AbstractStoreManager.addClasses
(AbstractStoreManager.java:788)
at org.datanucleus.store.AbstractStoreManager.addClass
(AbstractStoreManager.java:759)
at org.datanucleus.store.mapped.MappedStoreManager.getDatastoreClass
(MappedStoreManager.java:358)
at org.datanucleus.store.appengine.DatastoreManager.getDatastoreClass
(DatastoreManager.java:631)
at
[appengine-java] Freemarker Templates in Dev Server
I'm using freemarker as a template engine, but can't figure out how to get the dev server to accept changes in my templates. I have to restart the dev server. Research shows that the JRuby project has some success with this. Does anyone have any advise? -- 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: bulk download error 403
A quick test is if you can visit yourapp/remote_api in the web browser--it should work if you log in as an admin, well it should say This request did not contain a necessary header but not any other errors. On Dec 16, 2:52 pm, lembas keremo...@gmail.com wrote: I get exactly the same error when I try to bulkupload with this command: appcfg.py upload_data --auth_domain=mydomain.com --db_filename=skip -- url=http://remote.latest.myprogram.appspot.com/remote_api--no_cookies --has_header --config_file=loader.py --filename=kind.csv --kind=Kind myprogram On Dec 17, 12:37 am, lembas keremo...@gmail.com wrote: Hi, I have a java app on myprogram.appspot.com. I use google eclipse plugin to deploy it.(Eclipse 3.5, App Engine SDK 1.3.0, GWT SDK 2.0.0) I set the version to bulkload and deployed it. Now I have bulkload.latest.myprogram.appspot.com as I can see onhttps://appengine.google.com/deployment?app_id=myprogram I try to bulkdownload data to my app but cannot succeed. I use: bulkloader.py --dump --batch_size=5 --kind=Kind -- auth_domain=mydomain.com --url=http:// bulkload.latest.myprogram.appspot.com/remote_api --filename=dump.sql3 myprogram when I execute this command it asks my an email and a password. I enter ad...@mydomain.com and its password but the result is: [ERROR ] Exception during authentication Traceback (most recent call last): File C:\Program Files\Google\google_appengine\google\appengine\tools \bulkload er.py, line 2985, in Run request_manager.Authenticate() File C:\Program Files\Google\google_appengine\google\appengine\tools \bulkload er.py, line 1152, in Authenticate remote_api_stub.MaybeInvokeAuthentication() File C:\Program Files\Google\google_appengine\google\appengine\ext \remote_api \remote_api_stub.py, line 494, in MaybeInvokeAuthentication datastore_stub._server.Send(datastore_stub._path, payload=None) File C:\Program Files\Google\google_appengine\google\appengine\tools \appengin e_rpc.py, line 344, in Send f = self.opener.open(req) File C:\Python26\lib\urllib2.py, line 389, in open response = meth(req, response) File C:\Python26\lib\urllib2.py, line 502, in http_response 'http', request, response, code, msg, hdrs) File C:\Python26\lib\urllib2.py, line 427, in error return self._call_chain(*args) File C:\Python26\lib\urllib2.py, line 361, in _call_chain result = func(*args) File C:\Python26\lib\urllib2.py, line 510, in http_error_default raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) HTTPError: HTTP Error 403: Forbidden [INFO ] Authentication Failed I got exactly the same error above when I tried downloading with this command: appcfg.py download_data --auth_domain=mydomain.com --url=http:// bulkload.latest.myprogram.appspot.com/remote_api -- config_file=exporter.py --filename=kind_data_archive.csv --kind=Kind myprogram If I enter my gmail.com account and password, which I use to deploy the app in google eclipse plugin, the error is: Invalid username or password. Please enter login credentials for bukload.latest.myprogram.appspot.com My app.yaml in myprogram folder is: application: myprogram version: bulkload runtime: python api_version: 1 handlers: - url: /remote_api script: $PYTHON_LIB/google/appengine/ext/remote_api/handler.py login: admin Any help? Or should I ask it on google-appengine-python group or google-appengine group? Thanks. -- 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: Finding abandoned child entities
Hi. Thank you for following. Movement might be different depending on the entry method in JDO. thanks. -- 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] Dynamically create classes using JPA/JDO and bytecode instrumentation
Thanks DataNucleus team and Toby. Sorry, but I have some more questions 1. How do I delete a particular table dynamically? would just unloading the class do it? Iin that case, what if there are changes to the dynamic table, i.e. column addition/dropping, wouldnt that require unloading the class and hence deletion of table? 2. I am going through the Queries and Indexes section in the documentation at http://code.google.com/appengine/docs/java/datastore/queriesandindexes.html This section says that inequality operators are allowed only one property. Is anybody handling a situation where there are multiple properties with inequality operators? If yes, how have you done it? Thanks On Wed, Dec 16, 2009 at 12:18 PM, Toby Reyelts to...@google.com wrote: One other thing you might consider is using the native App Engine datastore, since it's already schemaless. You can even mix and match using the native API and JDO/JPA. On Wed, Dec 16, 2009 at 1:30 AM, Bombay Goose bombaygo...@gmail.comwrote: Hello All, I am doing a feasibility study of whether we can develop our application on appengine or not. Our application has a requirement where we have to create tables dynamically, without restarting the application. Is that possible in Appengine? Datanucleus supports this through JDO, with some byte code instrumentation. More info - http://www.jpox.org/servlet/wiki/pages/viewpage.action?pageId=6619188 Is it possible through JPA? if yes, does appengine allow it? if not, does Appengine allow Bytecode instrumentation so that we can create classes dynamically according to the link above using JDO. Any help is greatly appreciated. Thanks, G -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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.comgoogle-appengine-java%2bunsubscr...@googlegroups.com . For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en. -- 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: embedding parent object in parent-child relation with jdo
Could you not split your query into two? The first to find the parent
and the second to return all children with an ancestor query.
Alternatively, Twig makes embedding objects very simple. If you use
the AnnotationTypesafeDatastore you can achieve the above with a
single annotation:
@Component
Parent parent;
However, currently Twig does not support the parent being _both_ an
embedded component and an entity. It must be one of the other.
It will support this type of denormalisation in the next release which
I hope to get out a week or so after new year.
http://code.google.com/p/twig-persist/
John
On Dec 19, 3:58 am, Eugene Kuleshov ekules...@gmail.com wrote:
It shouldn't be needed, since according to the docs [1], the Key
type is only required to record parent relation in the child.
But I tried it anyways and got pretty much the same exception:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException: 0
at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
(DatastoreTable.java:356)
at org.datanucleus.store.appengine.DatastoreTable.buildMapping
(DatastoreTable.java:285)
at org.datanucleus.store.appengine.DatastoreManager.buildStoreData
(DatastoreManager.java:405)
...
regards,
Eugene
[1]http://code.google.com/appengine/docs/java/datastore/creatinggettinga...
On Dec 18, 2:33 pm, Rusty Wright rwright.li...@gmail.com wrote:
Try making the parent's primary key be Key instead of String.
Eugene Kuleshov wrote:
I am using the app engine SDK 1.3.0 with the latest Google Eclipse
plugin.
Currently, in order to be able to run queries on attributes of the
parent object I have to embed parent object into a child. So, I have
created the following classes
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Parent {
@PrimaryKey @Persistent String parentName;
@Persistent(mappedBy = parent) ListChild children = new
ArrayListChild();
public Parent(String parentName) { this.parentName = parentName; }
public void setParentName(String parentName) { this.parentName =
parentName; }
public String getParentName() { return parentName; }
public ListChild getChildren() { return children; }
public void addChild(Child child) {
child.setParent(this);
children.add(child);
}
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class Child {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) Key
childKey;
@Persistent String childName;
@Embedded(
members = { @Persistent(name = parentName, column =
childParentName) },
ownerMember = children)
@Persistent Parent parent;
public Child(String childName) { this.childName = childName; }
public void setChildName(String childName) { this.childName =
childName; }
public String getChildName() { return childName; }
public void setParent(Parent parent) { this.parent = parent; }
public Parent getParent() { return parent; }
}
and then I created a simple test to verify if I can persist and run
queries on those objects:
public class ParentTest {
public static void main(String[] args) {
Parent parent1 = new Parent(parent1);
parent1.addChild(new Child(child1));
parent1.addChild(new Child(child2));
Parent parent2 = new Parent(parent2);
parent2.addChild(new Child(child3));
ApiProxy.setEnvironmentForCurrentThread(new TestEnvironment());
ApiProxy.setDelegate(new ApiProxyLocalImpl(new File(.)) { });
ApiProxyLocalImpl proxy = (ApiProxyLocalImpl) ApiProxy.getDelegate
();
proxy.setProperty(LocalDatastoreService.NO_STORAGE_PROPERTY,
Boolean.TRUE.toString());
PersistenceManagerFactory pmf =
JDOHelper.getPersistenceManagerFactory(transactions-optional);
PersistenceManager pm = pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
try {
tx.begin();
pm.makePersistent(parent1);
tx.commit();
tx.begin();
pm.makePersistent(parent2);
tx.commit();
Query query2 = pm.newQuery(Child.class);
query2.setFilter(parent.parentName==parentNameParam);
query2.declareParameters(java.lang.String parentNameParam);
ListChild results2 = (ListChild) query2.executeWithArray
(parent1);
System.err.println(results2);
} finally {
if (tx.isActive()) {
tx.rollback();
}
pm.close();
}
}
}
The DataNucleus Enhancer runs ok on the above code, but when I run
my test app, I am getting an IndexOutOfBoundException from somewhere
in the DataNucleus internals:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException: 0
at org.datanucleus.store.appengine.DatastoreTable.initializeNonPK
(DatastoreTable.java:356)
at
