[appengine-java] Re: HttpServletRequest.getLocalPort() returns 0
Thank you Gabriel. Obrigado/FilipeAlvesFerreira#4(1942)
2009/8/25 Gabriel Moreira gabrielmore...@gmail.com
Im trying this on google appengine:
public class MyFilter implements javax.servlet.Filter {
public void doFilter(ServletRequest servletRequest, ServletResponse
response, FilterChain filterChain) throws IOException,
ServletException {
response.getWriter().print(port + ((HttpServletRequest)
servletRequest).getLocalPort() );
}
}
Testing this local url: http://localhost:8080/test.servlet
AppEngine is returning 8080 on HttpServletRequest.getLocalPort().
Testing this remote url: http://myapp.appspot.com/test.servlet
AppEngine is returning 0 on HttpServletRequest.getLocalPort().
Anyone can test this?
--
FilipeAlvesFerreira#4(1942)
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[appengine-java] Not able to upload application after adding com.google.gdata.DisableCookieHandler in appengine-web.xml file
I am using contact api in my application. According to google documents I have to add the following property in appengine-web.xml file see the link http://code.google.com/intl/zh-HK/appengine/kb/java.html#googledata system-properties property name=com.google.gdata.DisableCookieHandler value=true / /system-properties When I try to upload I get the following error An internal error occurred during: Deploying application to Google. XML error validating D:\opt\MyWorkSpace\CordysContact\war\WEB-INF \appengine-web.xml against D:\opt\Eclipse33\plugins \com.google.appengine.eclipse.sdkbundle_1.2.2.v200907131018\appengine- java-sdk-1.2.2\docs\appengine-web.xsd --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Accept-Encoding doesn't seem to get passed to the application
Hi I'm getting really strange behavior here where it looks as if the Accept-Encoding wouldn't get passed to the application. My request looks like this: GET /the/url HTTP/1.1 Accept-Encoding: gzip User-Agent: Jakarta Commons-HttpClient/3.1 Host: myapp.appspot.com Cookie: the cookie However the only headers I see are User-Agent, Host and Cookie. Cheers Philippe --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Probleme with Relationships managed by JDO
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[appengine-java] Getting Started: Using JSPs
hello together, i'm starting with development of google AppEngine. i tried to go through the getting started in the user doc. but i come to a problem. Up to this point i do not have problems with the getting started tutorial. my problem: in the tutorial is mentioned that the guestbook app will use JSP pages. if i add the *.jsp into the eclipse framework at the recommended position (in the war directory) eclipse marks the JSP as corrupted (with this nice red icon) without any suggestion why this file is not wanted at the current position. any ideas what there is the problem??? would be great... greatz valentino --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Getting Started: Using JSPs
Make sure you are using JDK, not just a JRE so your jsps can be compiled. Also JSP editor in Eclipse is not very clever :) Sometimes it marks valid jsps as corrupted. Closing and reopening editor sometimes helps. On Tue, Aug 25, 2009 at 12:30 PM, Valentino Hankypants f.hirs...@gmx.atwrote: hello together, i'm starting with development of google AppEngine. i tried to go through the getting started in the user doc. but i come to a problem. Up to this point i do not have problems with the getting started tutorial. my problem: in the tutorial is mentioned that the guestbook app will use JSP pages. if i add the *.jsp into the eclipse framework at the recommended position (in the war directory) eclipse marks the JSP as corrupted (with this nice red icon) without any suggestion why this file is not wanted at the current position. any ideas what there is the problem??? would be great... greatz valentino --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Getting Started: Using JSPs
no changes. i copied the file javac.exe from C:\Program Files\Java\jdk1.6.0_14\bin to C:\Program Files\Java\jre6\bin. then i closed eclipse opened it, nothing changed On 25 Aug., 11:38, Thanasis t.deleni...@gmail.com wrote: Hi, Copy file javac.exe from your jdk/bin directory to the jre/bin directory and recompile. On Aug 25, 12:30 pm, Valentino Hankypants f.hirs...@gmx.at wrote: hello together, i'm starting with development of google AppEngine. i tried to go through the getting started in the user doc. but i come to a problem. Up to this point i do not have problems with the getting started tutorial. my problem: in the tutorial is mentioned that the guestbook app will use JSP pages. if i add the *.jsp into the eclipse framework at the recommended position (in the war directory) eclipse marks the JSP as corrupted (with this nice red icon) without any suggestion why this file is not wanted at the current position. any ideas what there is the problem??? would be great... greatz valentino --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Getting Started: Using JSPs
Hmm... I had the same problem with you - I got this solution from other threads reporting the same error and it worked for me. I don't remember doing anything else... On Aug 25, 12:48 pm, Valentino Hankypants f.hirs...@gmx.at wrote: no changes. i copied the file javac.exe from C:\Program Files\Java\jdk1.6.0_14\bin to C:\Program Files\Java\jre6\bin. then i closed eclipse opened it, nothing changed On 25 Aug., 11:38, Thanasis t.deleni...@gmail.com wrote: Hi, Copy file javac.exe from your jdk/bin directory to the jre/bin directory and recompile. On Aug 25, 12:30 pm, Valentino Hankypants f.hirs...@gmx.at wrote: hello together, i'm starting with development of google AppEngine. i tried to go through the getting started in the user doc. but i come to a problem. Up to this point i do not have problems with the getting started tutorial. my problem: in the tutorial is mentioned that the guestbook app will use JSP pages. if i add the *.jsp into the eclipse framework at the recommended position (in the war directory) eclipse marks the JSP as corrupted (with this nice red icon) without any suggestion why this file is not wanted at the current position. any ideas what there is the problem??? would be great... greatz valentino --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Compile and execute at runtime
Hi Toby: Thanks for you feedback. I've did a small prototype: http://ask-me.appspot.com/ . It's working fine locally, but it's throwing the following exception when executed on the app-engine: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.albertattard.askme.client.utils.AssessmentTO com.albertattard.askme.client.AssessorService.assessCode(java.lang.String)' threw an unexpected exception: java.lang.VerifyError: (class: org/codehaus/janino/ByteArrayClassLoader, method: findClass signature: (Ljava/lang/String;)Ljava/lang/Class;) Illegal type in constant pool at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86) at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:237) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:139) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:4823) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:4821) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:359) at com.google.net.rpc.impl.Server$2.run(Server.java:820) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:516) at com.google.net.rpc.impl.Server.startRpc(Server.java:775) at com.google.net.rpc.impl.Server.processRequest(Server.java:348) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:436) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:428) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:762) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:374) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.VerifyError: (class: org/codehaus/janino/ByteArrayClassLoader, method: findClass signature: (Ljava/lang/String;)Ljava/lang/Class;) Illegal type in constant pool at org.codehaus.janino.SimpleCompiler.compileToClassLoader(SimpleCompiler.java) at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java) at org.codehaus.janino.Cookable.cook(Cookable.java) at org.codehaus.janino.Cookable.cook(Cookable.java) at org.codehaus.janino.Cookable.cook(Cookable.java) at com.albertattard.askme.server.DemoSwapAssessor.assess(DemoSwapAssessor.java:21) at com.albertattard.askme.server.AssessorServiceImpl.assessCode(AssessorServiceImpl.java:15) at
[appengine-java] Re: Getting Started: Using JSPs
thx a lot albert, your description in the blog solved my problem!!! On 25 Aug., 12:13, Albert Attard albertatt...@gmail.com wrote: Hi: All you need to do is configure eclipse to use the JDK instead of the default jre. See this blog for details:http://albertattard.blogspot.com/2009/08/jsp-compile-error-in-eclipse... http://albertattard.blogspot.com/2009/08/jsp-compile-error-in-eclipse...Hope this helps, Albert Attard Stephen Leacockhttp://www.brainyquote.com/quotes/authors/s/stephen_leacock.html - I detest life-insurance agents: they always argue that I shall some day die, which is not so. 2009/8/25 Thanasis t.deleni...@gmail.com Hmm... I had the same problem with you - I got this solution from other threads reporting the same error and it worked for me. I don't remember doing anything else... On Aug 25, 12:48 pm, Valentino Hankypants f.hirs...@gmx.at wrote: no changes. i copied the file javac.exe from C:\Program Files\Java\jdk1.6.0_14\bin to C:\Program Files\Java\jre6\bin. then i closed eclipse opened it, nothing changed On 25 Aug., 11:38, Thanasis t.deleni...@gmail.com wrote: Hi, Copy file javac.exe from your jdk/bin directory to the jre/bin directory and recompile. On Aug 25, 12:30 pm, Valentino Hankypants f.hirs...@gmx.at wrote: hello together, i'm starting with development of google AppEngine. i tried to go through the getting started in the user doc. but i come to a problem. Up to this point i do not have problems with the getting started tutorial. my problem: in the tutorial is mentioned that the guestbook app will use JSP pages. if i add the *.jsp into the eclipse framework at the recommended position (in the war directory) eclipse marks the JSP as corrupted (with this nice red icon) without any suggestion why this file is not wanted at the current position. any ideas what there is the problem??? would be great... greatz valentino --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Differences AppEngine Datastore and Azure Storage
Helll, i allready worked with azure and deployed some apps using storage and other technologies from windwos azure services platform. so my question, can anybody give me a short overview (or a link) where the differences between azure storage and AppEngine Datastore is clearly explained? greatz valentino --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Unicode to ASCII equivalence (java.text.Normalizer not supported by app-engine VM)
Hello!
I need to save unicode strings and also create a ascii version of
them (to make a keyword list for searching purposes) such as:
Animale, cu excepţia peştelui = [ANIMALE, EXCEPTIA, PESTELUI]
For that i need the following conversions: ţ - t, ş - s and so on.
My first approach was the following:
orig = Normalizer.normalize(field, Form.NFKD).toCharArray();
ascii = new byte[orig.length];
count = 0;
for (int i = 0; i orig.length; i++) {
if (orig[i] 128) {
ascii[count++] = (byte) orig[i];
}
}
try {
field = new String(ascii, UTF-8);
}
catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
This works very well in java generally, but when i tried it in an app-
engine project i got a compiler error:
java.text.Normalizer.Form is not supported by Google App Engine's
Java runtime environment
What workaround do you suggest?
Thank you,
Cornel
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[appengine-java] Re: Retrieving child records using entity group parent's primary key.
Hello
we have similar type of problem and code is
there is company class model.
public class Company implements ICompany {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private String name;
@Persistent
private Category catId;
}
this is my category class model
public class Category extends BaseObject implements ICategory {
private static final long serialVersionUID = 1L;
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key id;
@Persistent
private String name;
@Persistent
private Key parent;
}
catId of company is foreign key.
I want to retrieve company info with category details in single object
how implement in jdo . because in hibernate it joined automatically
and get details in single object.
I am trying to get the details of both in single object , but only
company info. is coming and category id is coming , not coming
category full details .
On Jul 28, 2:47 am, Jason (Google) apija...@google.com wrote:
Hi Shishir. Given that you mention annotations, I'm assuming that you're
using JDO. Please let me know if I'm incorrect.
If you're using JDO, this becomes very easy. You shouldn't have to manually
create the Key objects for your AccountInfo instances since App Engine will
create this for you when you persist your Customer entities (assuming you're
modeling an owned relationship between Customer and AccountInfo). To fetch
all AccountInfo entities associated with a given Customer, just create an
accessor for the accounts field in your Customer class that you used to
persist the AccountInfo entities in the first place.
See the documentation on Relationships for more information, and please let
me know if you have any more questions, and please feel free to paste your
JDO classes inline.
http://code.google.com/appengine/docs/java/datastore/relationships.ht...
Thanks,
- Jason
On Sat, Jul 25, 2009 at 9:49 PM, shishirm...@gmail.com
shishirm...@gmail.com wrote:
I have two classes; one is Customer and one is AccountInfo. A customer
can have multiple account numbers. I use the KeyBuilder.addChild()
method to create the AccountInfo keys. Now for each customer i wish to
retrieve all the accounts. How can this be achieved if there is no
foreign key reference in AccountInfo.
Secondly, if i have to create a foreign key reference of customerId in
AccountInfo, how can it be done using annotations?
Regards,
Shishir.
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[appengine-java] Re: java.rmi.server.UID Error
Hi Jason,
Sorry about the delay... I didn't get a mail regarding response to
this thread.
The fix I made was :
1. Within the Jena distribution, cd to src/com/hp/hpl/jena/rdf/model,
modify the constructor so that it does not use the offending rmi UID
generator
public AnonId() {
if (JenaParameters.disableBNodeUIDGeneration) {
synchronized (AnonId.class) {
id = A + idCount++; // + rand.nextLong();
}
} else {
id = java.util.UUID.randomUUID().toString();
}
}
You would need to import java.util.UUID for this.
There is another change as well ( attributed to Taylor Cowan)... both
of these can be found on the link here :
http://tech.groups.yahoo.com/group/jena-dev/message/39575
-Ic
On Aug 12, 5:19 am, Jason (Google) apija...@google.com wrote:
Can you detail the fix? I'd love to add your pointer(s) to the Will it play
in App Engine wiki
page:http://groups.google.com/group/google-appengine-java/web/will-it-play...
- Jason
On Mon, Aug 10, 2009 at 3:16 PM, Icarus pr.a...@gmail.com wrote:
The issue was with the Jena Framework source code and fixing that made
it possible to run the app.
On Aug 11, 2:21 am, Icarus pr.a...@gmail.com wrote:
Hi,
While using the Jena Semantic Framework for extracting RDF based
data, I come across the following error on GAE :
Uncaught exception from servlet
java.lang.NoClassDefFoundError: java.rmi.server.UID is a restricted
class. Please see the Google App Engine developer's guide for more
details.
at
com.google.apphosting.runtime.security.shared.stub.java.rmi.server.UID.clinit
(UID.java)
at com.hp.hpl.jena.rdf.model.AnonId.init(AnonId.java:78)
at com.hp.hpl.jena.rdf.model.AnonId.create(AnonId.java:60)
at com.hp.hpl.jena.graph.Node.createAnon(Node.java:45)
at com.hp.hpl.jena.rdf.arp.JenaReader.convert(JenaReader.java:
116)
at com.hp.hpl.jena.rdf.arp.JenaReader.convert(JenaReader.java:
128)
at com.hp.hpl.jena.rdf.arp.JenaHandler.statement
(JenaHandler.java:73)
at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.triple
(XMLHandler.java:
100)
at com.hp.hpl.jena.rdf.arp.impl.ParserSupport.triple
(ParserSupport.java:240)
at
com.hp.hpl.jena.rdf.arp.states.WantPropertyElement.aPredAndObj
(WantPropertyElement.java:187)
at
com.hp.hpl.jena.rdf.arp.states.Frame.processPropertyAttributes
(Frame.java:112)
at
com.hp.hpl.jena.rdf.arp.states.WantPropertyElement.startElement
(WantPropertyElement.java:116)
at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.startElement
(XMLHandler.java:137)
at org.apache.xerces.parsers.AbstractSAXParser.startElement
(Unknown
Source)
at
org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement
(Unknown Source)
at org.apache.xerces.impl.XMLNamespaceBinder.handleStartElement
(Unknown Source)
at org.apache.xerces.impl.XMLNamespaceBinder.emptyElement
(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement
(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl
$FragmentContentDispatcher.dispatch(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument
(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
Source)
at com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser.parse
(RDFXMLParser.java:
107)
at com.hp.hpl.jena.rdf.arp.JenaReader.read(JenaReader.java:158)
at com.hp.hpl.jena.rdf.arp.JenaReader.read(JenaReader.java:145)
at com.hp.hpl.jena.rdf.arp.JenaReader.read(JenaReader.java:215)
at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:
188)
This runs in dev mode on my local machine but gives problem from the
deployment on GAE server.
Any suggestions would be highly appreciated.
-Ic
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[appengine-java] Tutorial Java em Português
Pessoal, Alguém pode me ajudar indicando um tutorial onde mostre como trabalhar com o Google App Engine usando Java em português. Atenciosamente, Almir F. Rivas Jr Sincro Tecnologia (34) 9944-5791 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: JDO request IN
Right, you won't be able to do that. The underlying datastore doesn't support OR queries (and IN - OR). Yes you *can* do that. I already pointed out the query above, which the user seems to ignore for some reason. IN in Java equates to collParam.contains(theField) i.e this value is IN this collection. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: JDO request IN
Yes you *can* do that. I already pointed out the query above, which the user seems to ignore for some reason. IN in Java equates to collParam.contains(theField) i.e this value is IN this collection. Obviously that assumes that Google have implemented such a thing, though they could easily enough with the DataNucleus in-memory evaluator. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Any example for JPA One-To-Many relationship
It's not really any different in JPA and JDO, so the docs should cover what you want. http://code.google.com/appengine/docs/java/datastore/relationships.html I also wrote a few things that used JPA if it's useful (under the Modeling section): http://objectuser.wordpress.com/google-app-engine/ On Aug 24, 10:32 pm, niuy michael...@gmail.com wrote: Hi there, I am struggling to implements one-to-many relationship ,but I never make it work. Does any body make any relationship based on JPA? or it is impossible on GAE / J ? 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-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] How to query multivalued properties in low-level Datastore API?
Hi All,
I am using the low-level Datastore API in my application.
Suppose I store a bunch of 'Recipe' entities, where each entity has a
multivalued property named 'ingredients, and the ingredients property
is a set of Strings.
For instance:
Entity recipe= new Entity(recipe, tater tot casserole);
recipe.setProperty(ingredients, new HashSet() {{
add(Tater Tots);
add(peas);
add(Cream of Celery Soup);
add(hamburger);
}});
Can I create a Query in the low-level API that will select all recipes
that include 'hamburger in the ingredients???
I'm thinking that it's possible since it's supported in the JDO API,
but I cannot see how it should be done.
Thanks in advance,
-ted stockwell
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[appengine-java] Re: Issue to retrieve the data
Hello can you give me some idea how can I do this. On Tue, Aug 25, 2009 at 6:07 PM, datanucleus andy_jeffer...@yahoo.comwrote: I want to retrieve company info with category details in single object how implement in jdo . because in hibernate it joined automatically and get details in single object. How can it be a single object when you would have an object of type Company, with an internal Category object ? No, Hibernate will use lazy loading just like JDO does. Perhaps you ought to familiarise yourself with fetch groups, as per the DataNucleus docs. -- Rohit Jain 9313239880 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Datanucleus + Eclipse problems
Hi, Would you be able to post a quick sample code snippet that shows your behavior? Thanks, jason On Mon, Aug 24, 2009 at 11:22 PM, linhares linha...@gmail.com wrote: I have the same problem. And in my case it´s related to the use of the @PersistenceAware annotation. If I don´t use it, it works fine, otherwise eclipse starts an infinite loop with the enhancer. On Jul 7, 12:25 pm, Alex Rudnick a...@google.com wrote: Alright, thanks for the detailed report! I'll try to reproduce the problem and figure out what's going on. On Tue, Jul 7, 2009 at 4:07 AM, Rolandrol...@mbiproductions.com wrote: Well, I only have one project at the time: I have used an Eclipse JEE Ganymede SR1 installation on Windows XP (SP3) I use for another project (in C:\eclipse\) and just installed the Google Plugin for Eclipse 3.4 via Software Updates - Available Software - Add Site (http://dl.google.com/eclipse/plugin/3.4). Then I followed the GAE Guestbook tutorial and it worked fine. Then I switched on the GWT in the plugin and enhanced the GUI to use GWT (the result is onhttp://mbi-t1.appspot.com/). During development I shared the project in my SVN repository and worked additionally on my home PC (Windows Vista SP2). There I have several Eclipse versions installed and for this project I used Eclipse Ganymede SR2 for plain Java (not JEE) that was installed in C:\eclipse34. In the Preferences - Google Section I found that the Google plugin did not recognize the included SDKs for GAE and GWT as valid. Therefore I downloaded both SDKs separately and put them into the SVN in parallel to the project folder. I also ensured that the SVN checkout folder was the same on both PCs: D:\JAVA. Also I configured the Google Plugin to use the separate SDKs on both PCs. This worked so far.. In the course of the project I configured the Java compiler to use project specific settings, as such my standard Code templates, code formatter settings, and some slightly more restrictive compiler warning settings. I'm not sure when it began that the Enhancer Builder ran in an endless loop, but now it is the case and I have to disable it in the project settings to stop this behavior. I also had the impression that when I edit some file and store it, the Enhancer Builder did not find the class to enhance, because the edited file was in a subpackage: for example: edited file: src/guestbook/client/Guestbook.java file to be enhanced: src/guestbook/Greeting.java Actually I completed the project by using ANT and used Eclipse as an editor only. BTW: You can find the Sources on my Site: http://roland.blochberger.us/dl/guestbook_20090706.zip -- Alex Rudnick swe, gwt, atl --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: JDO usage of setRange
Hello Ennio,
I am hiting the same problem. I have only 9000 records. As you said
I can retrieve them in a single call. But since I do processing which
each of them I need to split it up in order not to use to much time.
So I thought it would be good to use the setRange. But at a certain
point it hits this magic border that you describe.
I can not believe that this has been implemented so poorly.
Did you find any solution to this?
Thanks,
Tobias
On Aug 7, 9:55 am, ennio piovesan ennio.piove...@gmail.com wrote:
It is not really true that queries can return at most 1000 results. I didn't
say to you that in my test application, if I setRange(0,5000) I get 5000
entities! You can try this athttp://unaprovadiennio.appspot.com/ writing
DISPLAY0Z5000 in the text box (you have to wait a bit). If you try
DISPLAY1050Z1060 you get the error.
Here the pieces of code used (it's a pie from StockWatcher sample
application):
[when you clic the Add button]
...
if(symbol.startsWith(DISPLAY)){
int posSep=symbol.indexOf(Z);
int daOffset = Integer.parseInt(symbol.substring(7,posSep));
int topLimit = Integer.parseInt(symbol.substring(posSep+1));
getAllLimited(daOffset, topLimit);
return;
}
...
[ the method called getAllLimited]
private void getAllLimited(int daOffset, int quanti) {
prodottoBaseService = GWT.create(ProdottoBaseService.class);
prodottoBaseService.getAll(Integer.valueOf(daOffset),
Integer.valueOf(quanti), new AsyncCallbackListProdottoBaseI() {
public void onFailure(Throwable error) {
Window.alert(failure + error.getMessage());
}
public void onSuccess(ListProdottoBaseI async) {
StringBuffer sb = new StringBuffer();
for(ProdottoBaseI pbi:async){
sb.append(pbi.toString()+\n);}
Window.alert(Totale + async.size()+ + sb.toString());
}
});
}
[ the method called getAll]
public ListProdottoBaseI getAll(Integer offset, Integer topLimit) {
PersistenceManager pm = PMF.get().getPersistenceManager();
ListProdottoBase prodotti = new ArrayListProdottoBase();
ListProdottoBaseI prodottiDTO = new ArrayListProdottoBaseI();
try {
Query q = pm.newQuery(SELECT FROM
com.google.gwt.sample.stockwatcher.server.ProdottoBase);
q.setOrdering(codice);
*q.setRange(offset.longValue(), topLimit.longValue());*
prodotti = (ListProdottoBase) q.execute();
for(ProdottoBase pb:prodotti){
prodottiDTO.add(getDTOProdottoBase(pb));
}
}finally {
pm.close();
}
return prodottiDTO;
}
...
I read the article you suggested on paging. I can hardly speak of best
practice. It is an (awesome) workaround. The final result is that I can't
use setRange to obtain 10 records when I look past the 1000th.
It is promising the item in the roadmap you recall.
Let's hope the road won't be long ...
Thanx again.
Ennio.
2009/8/6 Jason (Google) apija...@google.com:
Hi. Queries can return at most 1000 results, so I believe this is the
issue
you're experiencing -- results 1050-1060 don't exist. At most, you can use
setRange(989, 999).
This is a known restriction, and there is an item in the roadmap to
address
it: Cursors for continuing results of Datastore queries past the 1000
entity limit. In the meantime, if you need paging support, the following
article lays out the best practices that doesn't involve ranges/offsets.
The
code in the article is Python-based, but the principle is the same.
http://code.google.com/appengine/articles/paging.html
Also, Extent is a part of the JDO spec so I don't know what you mean by
saying you won't be able to use the JDO features.
- Jason
On Wed, Aug 5, 2009 at 12:31 AM, ennio1958 ennio.piove...@gmail.com
wrote:
I have some problem with the usage of setRange.
If I setRange(0,10) all works fine, and also if I setRange(400,700),
but if I setRange(1050, 1060) I get a server error probably due to
limit/quota problems. I read some comments on this in this group, but
not a great sequel. If the implementation of setRange involve limit/
quota even if what I expect is a 10 record list, I think it must be
rethinked.
The workaround I read (putting a limit on a property in the where
clause) is poor and not always applicable because if the range is,
say, of 10 records and there are more than 10 entities with the same
value for that property, I can't paginate because of an infinite
loop...
So I think it is a serious problem, because pagination is often and
widely used in applications and it is mandatory a general solution,
not workarounds.
I hope someone will give a positive answer to this.
Thank you.
Ennio.
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[appengine-java] Re: How to query multivalued properties in low-level Datastore API?
Thanks much. One more question... If I want to select recipes that have both hamburger and olives should I just add two filters??? Query query = new Query(recipe); query.addFilter(ingredients, Query.FilterOperator.EQUAL, hamburger); query.addFilter(ingredients, Query.FilterOperator.EQUAL, olives); --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Request to update jars in http://google-maven-repository.googlecode.com
Hi, 1.2.2 had been released more than a month ago but was not uploaded on the repository. The latest in there is 1.2.1 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-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Performance optimization of insert into datastore (cpu_ms/api_cpu_ms showing red)
Just curious - are the writes cheaper now, or is it still the same?
On Aug 25, 8:09 am, sree sraj...@gmail.com wrote:
Thanks for your reply.
My app id is my-sree.appspot.com. I have only 1 index defined on a
date property.
We get 6.5 hours of cpu time each reset on a daily basis. Do both
cpu_ms and api_cpu_ms gets counted for this? My app requires a lot of
writes and hence I want to optimize for best performance. I have very
few indexes created as well. And on a average my entity has around 10
properties.
On Aug 21, 8:39 pm, Don Schwarz schwa...@google.com wrote:
What is your app id? Do you have a large number of indexes defined for this
entity kind?
FYI, it's certainly a good idea to optimize for performance, but I wouldn't
worry too much about the particular point at which warnings appear in the
request logs. These are just guidelines to let you know which requests are
consuming the most CPU. If you're only planning to update these entities on
a fraction of your requests then the overall CPU cost should not be too
high. However, if your application is doing a lot of writes then by all
means, try to optimize this (e.g. by reducing the number of indexes, or
perhaps by reducing the number of columns if you don't query them
independently).
On Fri, Aug 21, 2009 at 6:55 AM, sree sraj...@gmail.com wrote:
In a test app I have created, I am able to insert only 2 rows per
request (for 1 entity with 10 properties only) into the datastore by
using low-level api without getting any warnings for cpu_ms /
api_cpu_ms usage.
However if I try to insert 3 rows or more (again only 1 entity being
inserted), the cpu gets used for more than 1s thereby generating a
warning or error from GAE.
Stats from GAE log:
For inserting 2 records - /insert.do 200 77ms 655cpu_ms 643api_cpu_ms
(everything ok)
For inserting 3 records - /insert.do 200 134ms 979cpu_ms
964api_cpu_ms (yellow warning)
For inserting 10 records - /insert.do 200 178ms 3249cpu_ms
3216api_cpu_ms (red warning)
How to optimize the ‘cpu_ms and api_cpu_ms’ usage? Can GAE perform
only as many operations as 2 inserts into datastore if we want to keep
within the warning levels?
Can you please provide some feedback as to whether I am doing anything
wrong in code or have not used a good practice to achieve better
performance. Thanks in advance.
Code in servlet (parsing and split operations have been benchmarked
and they are not causing any adverse impact on performance):
Pattern p1 = Pattern.compile(,); // created as servlet instance
variable
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
try {
DatastoreService datastore =
DatastoreServiceFactory.getDatastoreService();
ListEntity entity = new ArrayListEntity();
for (int i = 0; i n; i++) {
String[] record =
p1.split(1,tester,1.0,1.0,1.0,1.0,1.0,1.0);
data1 = Long.parseLong(record[0]);
data2 = record[1];
data3 = Double.parseDouble(record[2]);
data4 = Double.parseDouble(record[3]);
data5 = Double.parseDouble(record[4]);
data6 = Double.parseDouble(record[5]);
data7 = Double.parseDouble(record[6]);
data8 = Float.parseFloat(record[7]);
Entity e = new
Entity(DetailsBean.class.getSimpleName());
e.setProperty(column1, i);
e.setProperty(column2, data2);
e.setProperty(column3, i + data3);
e.setProperty(column4, i + data4);
e.setProperty(column5, i + data5);
e.setProperty(column6, i + data6);
e.setProperty(column7, i + data7);
e.setProperty(column8, i + data8);
e.setProperty(crDate, new Date());
e.setProperty(modDate, new Date());
entity.add(e);
}
datastore.put(entity);
} catch (Exception e) {
e.printStackTrace();
} finally {
persistenceManager.close();
}
}
Entity bean code:
package com.pojo;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import javax.jdo.annotations.IdGeneratorStrategy;
import
[appengine-java] Re: How to query multivalued properties in low-level Datastore API?
Yes, adding multiple filters (with any FilterOperator) does an AND operation. Vince On Tue, Aug 25, 2009 at 10:51 AM, ted stockwellemorn...@gmail.com wrote: Thanks much. One more question... If I want to select recipes that have both hamburger and olives should I just add two filters??? Query query = new Query(recipe); query.addFilter(ingredients, Query.FilterOperator.EQUAL, hamburger); query.addFilter(ingredients, Query.FilterOperator.EQUAL, olives); --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] datastore request returning the previous result...
Ive implemented the stockwatcher application and have adjusted it so
that it stores names and phone numbers. That all seems to be working
ok, however Ive now implemented a get function which looks for a
name, and returns a phone number. However, whats happening is that the
first search i do returns nothing, then if i search for the same name
again, then it returns the correct phone number, then if i search for
another name, it returns the first name's phone instead.
eg I have the following data in the datastore:
john
paul
i request the phone number for john and i get back
I request the phone number for paul and i get back
I request the phone number for john and i get back
Client side Java file contains:
private String GetOneContact(String Name) {
ContactService = GWT.create(ContactService.class);
ContactService.getoneContact(Name,new AsyncCallbackString()
{
public void onFailure(Throwable error) {
PhoneResult=ERROR;
}
public void onSuccess(String Phone) {
PhoneResult=Phone;
}
});
return (PhoneResult);
}
Server side (ContactServiceImpl.java) contains:
public String getoneContact(String Name) throws NotLoggedInException
{
checkLoggedIn();
String Phone=x;
PersistenceManager pm = getPersistenceManager();
try {
//Query q = pm.newQuery(Contact.class, user == u
Name==n);
Query q = pm.newQuery(Contact.class, user == u);
q.declareParameters(com.google.appengine.api.users.User u);
//q.declareParameters(John n);
ListContact Contacts = (ListContact) q.execute(getUser
());
for (Contact contact : Contacts) {
if (Name.equals(contact.getName()))
{Phone=contact.getPhone
();}
}
} finally {
pm.close();
}
return (Phone);
}
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[appengine-java] Developing JPA app - data not persisting
Hi, I am developing on my local computer using EclipseEE. I created a persistent class following the instructions in the how to. When I run the code to persist the object em.persist(this);, I don't get any errors, but I don't see any data anywhere. When I try to query, I do not find any objects with the data that I just set. Do I have to set up a database/datastore on my local computer in order for this to work? How would I go about doing so? 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-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Request to update jars in http://google-maven-repository.googlecode.com
On Aug 25, 6:37 pm, David david.yu@gmail.com wrote: Hi, 1.2.2 had been released more than a month ago but was not uploaded on the repository. The latest in there is 1.2.1 +1 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Request to update jars in http://google-maven-repository.googlecode.com
+1 On Aug 25, 8:00 pm, Philippe Marschall philippe.marsch...@gmail.com wrote: On Aug 25, 6:37 pm, David david.yu@gmail.com wrote: Hi, 1.2.2 had been released more than a month ago but was not uploaded on the repository. The latest in there is 1.2.1 +1 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: datastore request returning the previous result...
OK, after a little further investigation Ive confirmed now that the
client side function is taking in the correct search name, the problem
is certainly that the server side appears to be receiving the previous
request.
Ive changed the returns in both functions such that i now get the
following:
john:null
paul:(john)john:
john:(paul)paul:
where the format is:
input to client function : (input to server function):name of found
contact from query:phone of found contact from query
Thanks,
John
On Aug 25, 6:23 pm, John V Denley johnvden...@googlemail.com wrote:
Ive implemented the stockwatcher application and have adjusted it so
that it stores names and phone numbers. That all seems to be working
ok, however Ive now implemented a get function which looks for a
name, and returns a phone number. However, whats happening is that the
first search i do returns nothing, then if i search for the same name
again, then it returns the correct phone number, then if i search for
another name, it returns the first name's phone instead.
eg I have the following data in the datastore:
john
paul
i request the phone number for john and i get back
I request the phone number for paul and i get back
I request the phone number for john and i get back
Client side Java file contains:
private String GetOneContact(String Name) {
ContactService = GWT.create(ContactService.class);
ContactService.getoneContact(Name,new AsyncCallbackString()
{
public void onFailure(Throwable error) {
PhoneResult=ERROR;
}
public void onSuccess(String Phone) {
PhoneResult=Phone;
}
});
return (PhoneResult);
}
Server side (ContactServiceImpl.java) contains:
public String getoneContact(String Name) throws NotLoggedInException
{
checkLoggedIn();
String Phone=x;
PersistenceManager pm = getPersistenceManager();
try {
//Query q = pm.newQuery(Contact.class, user == u
Name==n);
Query q = pm.newQuery(Contact.class, user == u);
q.declareParameters(com.google.appengine.api.users.User u);
//q.declareParameters(John n);
ListContact Contacts = (ListContact) q.execute(getUser
());
for (Contact contact : Contacts) {
if (Name.equals(contact.getName()))
{Phone=contact.getPhone
();}
}
} finally {
pm.close();
}
return (Phone);
}
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[appengine-java] Re: Accept-Encoding doesn't seem to get passed to the application
On Aug 25, 8:31 pm, Martin Caslavsky mcaslav...@gmail.com wrote: Hi, App Engine does automatic gzip compression, so that may be the reason why it removes the header before it passes request to an application. That's a bit uncool, is there a way to disable this? I store my content in gzip for space reasons, for my use case that's a factor six to seven improvement. I store it in a Blob and need no indexing. If I know that the client accepts gzip I can save the decompression which saves CPU time. Uncompressing only that AppEngine compresses it again is a bit schizophrenic. Cheers Philippe --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Owned relationship with generated parent key
Hi John. No, you can persist both entities in a single transaction. Just follow the example in the documentation: http://code.google.com/appengine/docs/java/datastore/relationships.html#Owned_One_to_One_Relationships If you create new ContactInfo and Employee objects, then associate the objects using the Employee class' setContactInfo method, calling makePersistent(employee) will persist the ContactInfo object as well. - Jason On Fri, Aug 21, 2009 at 11:22 PM, jd jdpatter...@gmail.com wrote: Hi, I want to create an owned one to many relationship where the key for the parent is auto generated. Is this possible to to in a single transaction? Or do I need to commit the parent first so I can then get its key and set the parent key on the child? Thanks, John --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: How to model this scenario
Hi Sam. It may be somewhat redundant, but if you include a list property
with the two endpoints (in addition to the from and to properties), you can
do a reasonably efficient query to find all edges connected to A. Or, if you
know in advance which nodes you are interested in, you can keep track of
these when new edges are added so you don't have to query at all. So there
are numerous ways to tackle this problem.
- Jason
On Sat, Aug 22, 2009 at 1:27 PM, Sam Walker am.sam.wal...@gmail.com wrote:
Hi Jason,
I want to do a query like: Find all relationships in which A is involved. I
think I cannot do anything like filter(A.key in key). So the only way is to
do something like: filter(from = A.key fromAttribute = false) + filter(to
= A.key toAttribute = false) (1st model in original post) or filter(both =
A.key) followed by filtering the attributes from the result (second model in
original post). Is this the best way? Just felt a bit ugly thats why I
wanted to double check.
Constructing the key by concatenating keys of A and B will ensure that I
dont have multiple of Relationships between A and B.
Thanks.
On Thu, Aug 20, 2009 at 12:17 PM, Jason (Google) apija...@google.comwrote:
Hi Sam. Are you saying that, given two node names, you want to see if
there's an edge between them? In that case, couldn't you concatenate the two
node names, putting the smallest one first, and doing a direct get to see if
an entity is returned? If you get a result, that means there is an edge from
A-B, otherwise you'll get null (JPA) or trigger an exception (JDO).
Or are you asking how you'll access the individual nodes given that the
key is a concatenation. If this is your question, I'd recommend keeping A
and B as separate entities and creating a new kind for edges. Then you can
still get the individual nodes back and easily find whether any two nodes
are connected or not using my suggestion from the first paragraph. Does this
answer your question?
- Jason
On Wed, Aug 19, 2009 at 10:42 PM, Sam Walker am.sam.wal...@gmail.comwrote:
I want to create a key for this relationship, lets say if A - B exists,
B - A cannot exist together. I was thinking of concatenating key A and key
B, sth like A-B. I make sure the smallest key is first, so that I dont have
any B-As.
But, how would I do a query for the two entitites? Is the only solution
to have extra ArrayListKey or Key from, Key to attributes and put them in
the criteria?
On Mon, Aug 10, 2009 at 5:08 AM, objectuser kevin.k.le...@gmail.comwrote:
If that's as complex as your queries get, I'd recommend just doing to
queries and merging the results.
Also, if the semantics of fromAttribute and toAttribute are different,
then you've lost that in your second model.
On Aug 9, 10:45 pm, Sam Walker am.sam.wal...@gmail.com wrote:
I have a directed graph scenario and I want to model the relationship
with
App Engine data store.
Relationship {
Key from;
Key to;
boolean fromAttribute;
boolean toAttribute;
}
I want to do this query: where (from = key and fromAttribute =
attribute) or (to = key and toAttribute = attribute). Ors are
not
allowed. So, I am not sure how to do it. I am now thinking of doing:
Relationship {
ArrayListKey both; // Will always have two keys
ArrayListboolean attributes;
}
Now, I could change the query to: where key in both, and then check
for
respective attributes, but that's kinda ugly.
I am sure there will be a better way, please help.
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[appengine-java] Re: Are 1.2.2 sdk jars available in a public maven repository?
It looks like you already found this thread: http://groups.google.com/group/google-appengine-java/browse_thread/thread/6130b425d90e0e6a In short, no, Google does not provide a Maven repository although there are user-provided Maven descriptors available. - Jason On Sat, Aug 22, 2009 at 12:45 PM, Marcel Overdijk marceloverd...@gmail.comwrote: Are 1.2.2 sdk jars available in a public maven repository? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: DatastoreService.put(IterableEntity) success/failure indicators
Hi Vince. If the put completes, without throwing an exception, all entities are guaranteed to be persisted to the datastore. But if you don't use transactions and the put call fails, some entities may be written. Using transactions allows you to rollback in case the call fails. - Jason On Fri, Aug 21, 2009 at 11:43 AM, Vince Bonfanti vbonfa...@gmail.comwrote: I think I've seen this question somewhere else, but I've searched and can't seem to find it, so I apologize in advance is this is a duplicate. I'm using the datastore low-level API to do a batch put via DatastoreService.put(IterableEntity). Some questions related to this method: 1. If this method succeeds (does not throw an exception) does that guarantee that all entities were written to the datastore successfully? 2. If this method fails (throws a DatastoreFailureException) does that mean that none of the entities were written, or that some were and some weren't? If the latter, is there any way to know which entities were successfully written and which weren't? 3. If I invoke DatastoreService.put(Transaction, IterableEntity) and it throws a DatastoreFailureException, does invoking Transaction.rollback() guarantee that none of the entities are written to the datastore? (I'm pretty sure the answer to this one must be yes). When doing a batch put, I need to be able to guarantee that all entities are either written, or all not written. I think the best way is to use a transaction, but thought I'd ask to make sure my understanding of how this works is correct. 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-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] JPA support for enum's
Has anyone managed to get an enum persisted via JPA? I can't I get an exception from the runtime, no such method init() V, which I take to mean that it cannot locate a public no-args constructor for the enum ... go figure ... :( --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Performance implications of embedded classes
Hello, I just went through the getting started documents and have a question regarding embedded classes, which I haven't found discussed elsewhere (maybe because it is trivial ;-): What are the performance implications of defining a class as embedded? Is it the same as if the fields of the embedded class are directly defined in the parent class? Or do I gain any performance benefits by defining a class as embedded - maybe because the fields of the embedded class become part of a different index? Or maybe because the fields of the embedded class are lazily retrieved if the parent class is retrieved? thanks, franz --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Bulk update throws exception
I have exactly the same problem, I instantiate a number of @Entity objects (all of the same type) persist them, and flush them in the context of the same transaction. Since they are all of the same type, and their are no relationships (although there is an @Embedded class/field) I would imagine that they are all modelled as being in the same entity group .. but apparently not. The documentation is basically useless at this point ... On Aug 15, 1:09 pm, Foreigner foreigne...@gmail.com wrote: While trying to do a bulk update on my entities using JPA I get the exception bellow. I understand that you can't do a bulk update on different entity groups in the same transaction but I guess I don't quite understand what an entity group is and how I go about making all entities part of the same group I want. Thanks for the help. fbr Illegal argument org.datanucleus.exceptions.NucleusUserException: Illegal argument at org.datanucleus.store.appengine.DatastoreExceptionTranslator.wrapIllegalArgumentException(DatastoreExceptionTranslator.java:42) at org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.put(RuntimeExceptionWrappingDatastoreService.java:106) at org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:125) at org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:94) at org.datanucleus.store.appengine.DatastorePersistenceHandler.updateObject(DatastorePersistenceHandler.java:398) at org.datanucleus.state.JDOStateManagerImpl.flush(JDOStateManagerImpl.java:4458) at org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java:2807) at org.datanucleus.ObjectManagerImpl.markDirty(ObjectManagerImpl.java:2617) at org.datanucleus.state.JDOStateManagerImpl.postWriteField(JDOStateManagerImpl.java:4241) at org.datanucleus.state.JDOStateManagerImpl.setObjectField(JDOStateManagerImpl.java:2287) at com.yicook.entities.TwitterDailyTip.jdoSetlastSet(TwitterDailyTip.java) at com.yicook.entities.TwitterDailyTip.setLastSet(TwitterDailyTip.java:36) at com.yicook.control.bco.TwitterStatusSetterBCO.resetTDT(TwitterStatusSetterBCO.java:60) at com.yicook.control.bco.TwitterStatusSetterBCO.execute(TwitterStatusSetterBCO.java:40) at com.yicook.control.ApplicationController.executeControllers(ApplicationController.java:61) at com.yicook.control.ApplicationController.dispatch(ApplicationController.java:41) at com.yicook.servlets.FrontController.doPost(FrontController.java:31) at com.yicook.servlets.FrontController.doGet(FrontController.java:25) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:54) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:306) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396) at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442) Caused by: java.lang.IllegalArgumentException: can't operate on multiple entity groups in a single transaction. found both
[appengine-java] Re: datastore request returning the previous result...
A, after some investigation, looks like what im doing is
initiating an asynchronous request to the server, and then not waiting
long enough for the reply, hence why im getting the reply whenever i
make the second request
Can anyone tell me how i can make sure i get the reply ive asked for?
what am i missing here?
Thanks,
John
On Aug 25, 7:30 pm, John V Denley johnvden...@googlemail.com wrote:
OK, after a little further investigation Ive confirmed now that the
client side function is taking in the correct search name, the problem
is certainly that the server side appears to be receiving the previous
request.
Ive changed the returns in both functions such that i now get the
following:
john:null
paul:(john)john:
john:(paul)paul:
where the format is:
input to client function : (input to server function):name of found
contact from query:phone of found contact from query
Thanks,
John
On Aug 25, 6:23 pm, John V Denley johnvden...@googlemail.com wrote:
Ive implemented the stockwatcher application and have adjusted it so
that it stores names and phone numbers. That all seems to be working
ok, however Ive now implemented a get function which looks for a
name, and returns a phone number. However, whats happening is that the
first search i do returns nothing, then if i search for the same name
again, then it returns the correct phone number, then if i search for
another name, it returns the first name's phone instead.
eg I have the following data in the datastore:
john
paul
i request the phone number for john and i get back
I request the phone number for paul and i get back
I request the phone number for john and i get back
Client side Java file contains:
private String GetOneContact(String Name) {
ContactService = GWT.create(ContactService.class);
ContactService.getoneContact(Name,new AsyncCallbackString()
{
public void onFailure(Throwable error) {
PhoneResult=ERROR;
}
public void onSuccess(String Phone) {
PhoneResult=Phone;
}
});
return (PhoneResult);
}
Server side (ContactServiceImpl.java) contains:
public String getoneContact(String Name) throws NotLoggedInException
{
checkLoggedIn();
String Phone=x;
PersistenceManager pm = getPersistenceManager();
try {
//Query q = pm.newQuery(Contact.class, user == u
Name==n);
Query q = pm.newQuery(Contact.class, user == u);
q.declareParameters(com.google.appengine.api.users.User
u);
//q.declareParameters(John n);
ListContact Contacts = (ListContact) q.execute(getUser
());
for (Contact contact : Contacts) {
if (Name.equals(contact.getName()))
{Phone=contact.getPhone
();}
}
} finally {
pm.close();
}
return (Phone);
}
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[appengine-java] Re: Compile and execute at runtime
Hey Albert, That code should actually work ok, but you've managed to tickle a bug in our runtime. I've filed an issuehttp://code.google.com/p/googleappengine/issues/detail?id=2028for you here. The fix for this probably won't make the next release, but it should come shortly thereafter. On Tue, Aug 25, 2009 at 6:33 AM, Albert Attard albertatt...@gmail.comwrote: Hi Toby: Thanks for you feedback. I've did a small prototype: http://ask-me.appspot.com/ . It's working fine locally, but it's throwing the following exception when executed on the app-engine: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.albertattard.askme.client.utils.AssessmentTO com.albertattard.askme.client.AssessorService.assessCode(java.lang.String)' threw an unexpected exception: java.lang.VerifyError: (class: org/codehaus/janino/ByteArrayClassLoader, method: findClass signature: (Ljava/lang/String;)Ljava/lang/Class;) Illegal type in constant pool at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86) at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:237) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:139) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:4823) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:4821) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:359) at com.google.net.rpc.impl.Server$2.run(Server.java:820) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:516) at com.google.net.rpc.impl.Server.startRpc(Server.java:775) at com.google.net.rpc.impl.Server.processRequest(Server.java:348) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:436) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:428) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:762) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:374) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.VerifyError: (class: org/codehaus/janino/ByteArrayClassLoader, method: findClass signature: (Ljava/lang/String;)Ljava/lang/Class;) Illegal type in constant pool
[appengine-java] why is my asynccallback not working?
The following code returns null the first time it is run, and then
returns the previous request on the second time it is called can
anyone see whats going wrong? Surely it should wait until it gets the
server response before returning a value? or am I missing the point
here?
private String GetOneContact(String Name) {
//ContactService = GWT.create(ContactService.class);
ContactService.getoneContact(Name,new AsyncCallbackString()
{
public void onFailure(Throwable error) {
PhoneResult=ERROR;
}
public void onSuccess(String Phone) {
PhoneResult=Phone;
}
});
return (Phone);
}
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[appengine-java] Re: Bulk update throws exception
h' ... so it would seem that 2 or more entity (instances) persisted in the same tx cause this error ... this cannot be so ... how is the mapping from instance to entity (group) made? On Aug 25, 2:33 pm, Larry Cable larry.ca...@gmail.com wrote: I have exactly the same problem, I instantiate a number of @Entity objects (all of the same type) persist them, and flush them in the context of the same transaction. Since they are all of the same type, and their are no relationships (although there is an @Embedded class/field) I would imagine that they are all modelled as being in the sameentitygroup.. but apparently not. The documentation is basically useless at this point ... On Aug 15, 1:09 pm, Foreigner foreigne...@gmail.com wrote: While trying to do a bulk update on my entities using JPA I get the exception bellow. I understand that you can't do a bulk update on differententitygroups in the same transaction but I guess I don't quite understand what anentity groupis and how I go about making all entities part of the samegroupI want. Thanks for the help. fbr Illegal argument org.datanucleus.exceptions.NucleusUserException: Illegal argument at org.datanucleus.store.appengine.DatastoreExceptionTranslator.wrapIllegalArgumentException(DatastoreExceptionTranslator.java:42) at org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.put(RuntimeExceptionWrappingDatastoreService.java:106) at org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:125) at org.datanucleus.store.appengine.DatastorePersistenceHandler.put(DatastorePersistenceHandler.java:94) at org.datanucleus.store.appengine.DatastorePersistenceHandler.updateObject(DatastorePersistenceHandler.java:398) at org.datanucleus.state.JDOStateManagerImpl.flush(JDOStateManagerImpl.java:4458) at org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java:2807) at org.datanucleus.ObjectManagerImpl.markDirty(ObjectManagerImpl.java:2617) at org.datanucleus.state.JDOStateManagerImpl.postWriteField(JDOStateManagerImpl.java:4241) at org.datanucleus.state.JDOStateManagerImpl.setObjectField(JDOStateManagerImpl.java:2287) at com.yicook.entities.TwitterDailyTip.jdoSetlastSet(TwitterDailyTip.java) at com.yicook.entities.TwitterDailyTip.setLastSet(TwitterDailyTip.java:36) at com.yicook.control.bco.TwitterStatusSetterBCO.resetTDT(TwitterStatusSetterBCO.java:60) at com.yicook.control.bco.TwitterStatusSetterBCO.execute(TwitterStatusSetterBCO.java:40) at com.yicook.control.ApplicationController.executeControllers(ApplicationController.java:61) at com.yicook.control.ApplicationController.dispatch(ApplicationController.java:41) at com.yicook.servlets.FrontController.doPost(FrontController.java:31) at com.yicook.servlets.FrontController.doGet(FrontController.java:25) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:54) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:306) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) at
[appengine-java] Re: datastore request returning the previous result...
I have had a reply to another thread which indicated that I had
misunderstood how the coding for ths async call was working... I
include the explaination below for completeness, incase anyone else
has the same problem. and finds this thread rather than my other
thread!!
private String GetOneContact(String Name) {
ContactService = GWT.create(ContactService.class);
ContactService.getoneContact(Name,new AsyncCallbackString()
{
public void onFailure(Throwable error) {
PhoneResult=ERROR;
}
public void onSuccess(String Phone) {
PhoneResult=Phone;
***This area of the code is what happens immediately after the
asynccallback completes successfully
}
});
return (PhoneResult);
***This area of the code actually gets executed immediately
after the AsyncCallback is initiated, and as such can happen before
the code above!!
}
On Aug 25, 10:35 pm, John V Denley johnvden...@googlemail.com wrote:
A, after some investigation, looks like what im doing is
initiating an asynchronous request to the server, and then not waiting
long enough for the reply, hence why im getting the reply whenever i
make the second request
Can anyone tell me how i can make sure i get the reply ive asked for?
what am i missing here?
Thanks,
John
On Aug 25, 7:30 pm, John V Denley johnvden...@googlemail.com wrote:
OK, after a little further investigation Ive confirmed now that the
client side function is taking in the correct search name, the problem
is certainly that the server side appears to be receiving the previous
request.
Ive changed the returns in both functions such that i now get the
following:
john:null
paul:(john)john:
john:(paul)paul:
where the format is:
input to client function : (input to server function):name of found
contact from query:phone of found contact from query
Thanks,
John
On Aug 25, 6:23 pm, John V Denley johnvden...@googlemail.com wrote:
Ive implemented the stockwatcher application and have adjusted it so
that it stores names and phone numbers. That all seems to be working
ok, however Ive now implemented a get function which looks for a
name, and returns a phone number. However, whats happening is that the
first search i do returns nothing, then if i search for the same name
again, then it returns the correct phone number, then if i search for
another name, it returns the first name's phone instead.
eg I have the following data in the datastore:
john
paul
i request the phone number for john and i get back
I request the phone number for paul and i get back
I request the phone number for john and i get back
Client side Java file contains:
private String GetOneContact(String Name) {
ContactService = GWT.create(ContactService.class);
ContactService.getoneContact(Name,new AsyncCallbackString()
{
public void onFailure(Throwable error) {
PhoneResult=ERROR;
}
public void onSuccess(String Phone) {
PhoneResult=Phone;
}
});
return (PhoneResult);
}
Server side (ContactServiceImpl.java) contains:
public String getoneContact(String Name) throws NotLoggedInException
{
checkLoggedIn();
String Phone=x;
PersistenceManager pm = getPersistenceManager();
try {
//Query q = pm.newQuery(Contact.class, user == u
Name==n);
Query q = pm.newQuery(Contact.class, user == u);
q.declareParameters(com.google.appengine.api.users.User
u);
//q.declareParameters(John n);
ListContact Contacts = (ListContact) q.execute(getUser
());
for (Contact contact : Contacts) {
if (Name.equals(contact.getName()))
{Phone=contact.getPhone
();}
}
} finally {
pm.close();
}
return (Phone);
}
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[appengine-java] Re: Can't persist objects -- impossible method is called
Hey I'm still getting this error. Here is my entity code. This is very
frustrating and I have no idea how to resolve. Please help me out.
package com.todoroo.model;
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Transient;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.Text;
@SuppressWarnings(serial)
@Entity
public class Message extends BaseObject implements TDRIdentifiable {
public enum Medium {
EMAIL, SMS, ANDROID, IPHONE
}
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Key key = null;
/** The subject is optional, and not even applicable for SMS. */
private String subject = null;
@Enumerated
private Text body = null;
private Medium medium = Medium.EMAIL;
private Long user = null;
@Enumerated
private Key actionPlan = null;
/** Denormalize the coach name to send via API quicker. */
private String coachName = null;
/** Denormalize the coach ID to send via API quicker. */
@Enumerated
private Key coach = null;
/** When the message was created (i.e. enqueued) */
private Date created = null;
/** Has the user acknowledged this message yet? */
private Boolean acknowledged = false;
/**
* @return the key
*/
public Key getKey() {
return key;
}
/**
* @param key
*the key to set
*/
public void setKey(Key key) {
this.key = key;
}
/**
* @return the subject
*/
public String getSubject() {
return subject;
}
/**
* @param subject
*the subject to set
*/
public void setSubject(String subject) {
this.subject = subject;
}
/**
* @return the body
*/
public Text getBody() {
return body;
}
/**
* @param body
*the body to set
*/
public void setBody(Text body) {
this.body = body;
}
/**
* @return the medium
*/
public Medium getMedium() {
return medium;
}
/**
* @param medium the medium to set
*/
public void setMedium(Medium medium) {
this.medium = medium;
}
/**
* @return the user
*/
public Long getUser() {
return user;
}
/**
* @param user the user to set
*/
public void setUser(Long user) {
this.user = user;
}
/**
* @return the actionPlan
*/
public Key getActionPlan() {
return actionPlan;
}
/**
* @param actionPlan the actionPlan to set
*/
public void setActionPlan(Key actionPlan) {
this.actionPlan = actionPlan;
}
/**
* @return the created
*/
public Date getCreated() {
return created;
}
/**
* @param created the created to set
*/
public void setCreated(Date created) {
this.created = created;
}
/**
* @return the acknowledged
*/
public Boolean getAcknowledged() {
return acknowledged;
}
/**
* @param acknowledged the acknowledged to set
*/
public void setAcknowledged(Boolean acknowledged) {
this.acknowledged = acknowledged;
}
/**
* @return the coachName
*/
public String getCoachName() {
return coachName;
}
/**
* @param coachName the coachName to set
*/
public void setCoachName(String coachName) {
this.coachName = coachName;
}
/**
* @return the coach
*/
public Key getCoach() {
return coach;
}
/**
* @param coach the coach to set
*/
public void setCoach(Key coach) {
this.coach = coach;
}
@Transient
public boolean wasAcknowledged() {
return getAcknowledged();
}
@Transient
public boolean isAcknowledged() {
return getAcknowledged();
}
@Transient
public Object getIdOrKey() {
return key;
}
}
On Aug 24, 2:55 am, Abe Parvand eparv...@gmail.com wrote:
All I'm doing is
[appengine-java] Re: Performance implications of embedded classes
Embedding is the same as defining the fields on the parent. Assuming you need the embedded data most of the time, and it is small, I think you gain a performance boost as to load the data you only load one entity, not two. This assumes the embedded class is small in size, and you require its data. The data would not be lazily loaded. If you hardly use its data, or it is large and you only sometimes need it, you will loose performance as it is loaded each time. Also using embedded means you can search the parent via the embedded fields. Otherwise you cannot. On Aug 26, 7:25 am, Larry Cable larry.ca...@gmail.com wrote: I'd be surprised if you can even get them to work!!! I am having no end of trouble getting a pretyt basic @Embedded scenarios to work ... good luck! On Aug 25, 2:19 pm, fx.mueller fr.x.muel...@gmail.com wrote: Hello, I just went through the getting started documents and have a question regarding embedded classes, which I haven't found discussed elsewhere (maybe because it is trivial ;-): What are the performance implications of defining a class as embedded? Is it the same as if the fields of the embedded class are directly defined in the parent class? Or do I gain any performance benefits by defining a class as embedded - maybe because the fields of the embedded class become part of a different index? Or maybe because the fields of the embedded class are lazily retrieved if the parent class is retrieved? thanks, franz- Hide quoted text - - Show quoted text - --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Re: Unable to upload
This could be complicated. My ISP (mstar) recently partnered with google and so I ended up with a google account and gmail with the account name randalljohn...@mstar.net (my email account name). Last week I signed up for an App Engine account using the same username but a different password. I have logged into appengine.google.com and created two applications. I know that they are created because their names (optasst and optionassistant) changed from being available to unavailable after I created them. However they do not show up on the app engine start page. When I deploy to app engine, the applications fail to upload with indicated message (username and password do not match) even though I use the same username and password I use to log into appengine.google.com. The apps work as expected when run locally. I am not aware of having a Google Apps account, but I'm not sure what my ISP did when they partnered with Google. Thanks for the help. Randall Johnson On Aug 25, 2:39 pm, Jason (Google) apija...@google.com wrote: Hi Randall. What is your application's ID and which email address are you using during deployment? Are you using an account on a Google Apps domain by any chance? If so, have you tried signing in tohttp://appengine.google.com/a/DOMAIN to see if your apps appear there? Thanks, - Jason On Fri, Aug 21, 2009 at 3:05 PM, Randall randalljohn...@mstar.net wrote: I get the message Email xx and password do not match when I try to deploy to AppEngine. However I use the same username and password to log into the appengine website successfully. I get the same error message whether I deploy using the Netbeans plug-in or appcfg from the command line. Also, I have created two applications but they do not appear when I log into appengine.google.com. I have verified that the application names were really created by checking their (non)availibility. Does anyone know why my username/password won't work for upload when it works for log in?- Hide quoted text - - Show quoted text - --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
[appengine-java] Local server works, Appspot fails with java.lang.StackOverflowError when Spring AOP is enabled
My app is using Spring 3.0. If i disable Spring AOP, my app runs fine both on local and appspot. But when i enable Spring AOP (tested with advice or aspects), in local runtime everything is fine and works, but in appspot im getting this error: java.lang.StackOverflowError at java.lang.String.endsWith(Unknown Source) at sun.security.provider.PolicyFile.canonPath(Unknown Source) at java.io.FilePermission$1.run(Unknown Source) at java.io.FilePermission$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.io.FilePermission.init(Unknown Source) at java.io.FilePermission.init(Unknown Source) at sun.net.www.protocol.file.FileURLConnection.getPermission(Unknown Source) at sun.misc.URLClassPath.check(Unknown Source) at sun.misc.URLClassPath$FileLoader.getResource(Unknown Source) at sun.misc.URLClassPath$FileLoader.findResource(Unknown Source) at sun.misc.URLClassPath.findResource(Unknown Source) at java.net.URLClassLoader$2.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findResource(Unknown Source) at com.google.apphosting.runtime.security.UserClassLoader.findResource (UserClassLoader.java:631) at java.lang.ClassLoader.getResource(Unknown Source) at com.google.apphosting.runtime.security.UserClassLoader$4.run (UserClassLoader.java:665) at com.google.apphosting.runtime.security.UserClassLoader$4.run (UserClassLoader.java:659) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.UserClassLoader.findResource (UserClassLoader.java:659) at java.lang.ClassLoader.getResource(Unknown Source) at com.google.apphosting.runtime.security.UserClassLoader$4.run (UserClassLoader.java:665) at com.google.apphosting.runtime.security.UserClassLoader$4.run (UserClassLoader.java:659) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.UserClassLoader.findResource (UserClassLoader.java:659) at java.lang.ClassLoader.getResource(Unknown Source) at com.google.apphosting.runtime.security.UserClassLoader$4.run (UserClassLoader.java:665) at com.google.apphosting.runtime.security.UserClassLoader$4.run (UserClassLoader.java:659) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.UserClassLoader.findResour... My applicationContext.xml: ?xml version=1.0 encoding=UTF-8? beans xmlns=http://www.springframework.org/schema/beans; xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance; xmlns:aop=http://www.springframework.org/schema/aop; xmlns:context=http://www.springframework.org/schema/context; xmlns:tx=http://www.springframework.org/schema/tx; xsi:schemaLocation=http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd; !-- Habilita annotations para JPA -- !-- VERIFICAR: bean class=org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor / -- bean class=org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor / context:property-placeholder location=classpath:application.properties / !-- JPA Entity Manager -- bean id=entityManagerFactory class=org.springframework.orm.jpa.LocalEntityManagerFactoryBean property name=persistenceUnitName value=transactions-optional / /bean !-- Activates spring transaction container -- bean id=transactionManager class=org.springframework.orm.jpa.JpaTransactionManager property name=entityManagerFactory ref=entityManagerFactory / /bean !-- Cache configuration -- bean id=cacheManager class=org.springframework.cache.ehcache.EhCacheManagerFactoryBean property name=configLocation valueclasspath:ehcache.xml/value /property /bean !-- Activates annotations to be detected in bean classes: @Transaction -- tx:annotation-driven transaction-manager=transactionManager /
[appengine-java] Re: Model to Optimize Queries
Any ideas, anyone?
On Sun, Aug 23, 2009 at 11:18 PM, Sam Walker am.sam.wal...@gmail.comwrote:
Also, I get this error: *Can only filter by properties of a sub-object if
the sub-object is embedded.* when I tried to access article while setting
a fitler: query.setFilter(reviewer == reviewerParam article.status =
articleStatusParam);
What am I missing?
On Sat, Aug 22, 2009 at 6:02 PM, Sam Walker am.sam.wal...@gmail.comwrote:
In the second model, how will I find all Articles being reviewed by A and
B?
The only way I can think of is adding another derived field in Article:
Article {
HashSetReview reviews;
HashSetReviewer reviewers; // keys of Reviewers to help the query
find all articles reviewed by A and B
HashSetString tags;
int status; // derived from all Reviews' statuses.
}
Review {
Article article;
Reviewer reviewer;
int status;
}
Now I should be able to do reviewers.contains(A.key) and
reviewers.contains(B.key). Is that the best way?
On Sat, Aug 22, 2009 at 2:02 PM, Sam Walker am.sam.wal...@gmail.comwrote:
Oh sweet, I didn't know that.
That's awesome! Thanks for the quick reply.
On Sat, Aug 22, 2009 at 1:51 PM, datanucleus
andy_jeffer...@yahoo.comwrote:
I dont think I can do sth like (I can't access article.tags,
article.status
as far as I know, correct?):
Of course you can. JDO spec defines JDOQL, using Java syntax.
query.setFilter(reviewer == reviewerParam status == statusParam
article.tags == tagParam article.status = articleStatusParam);
What is tagParam ? an element of the hashSet?
You can't do Collection == element in Java so you can't in JDOQL.
You could do article.tags.contains(tagParam)
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[appengine-java] Re: 401 Unauthorized Must authenticate first. I can't upload my project
I finally solved the problem. For some reason, the date/time setting on my windows was incorectly set to a future point in time. Setting the correct date/time solved the issue. -Cyr On 23 Aug., 18:35, Cyrano dirk_ehrh...@yahoo.de wrote: As I have the same problem, I take the freedon to respond wiht my details. I tred with both Eclipse and Ant. When I enter a wrong password, I get the error email and password do not match. If I enter them correctly, I get the 401Must authenticate first error. I am definetely not behind a proxy -Cyr On 22 Aug., 10:22, bb1987 bb1987 bbd1...@gmail.com wrote: Are you trying to deploy from Eclipse or using Ant? Have you tried both? Yes, I have tried both several times. And are you behind a proxy server by any chance? No, I don't think so. This is probably a given, but are you certain that you're entering the correct credentials at the username and password prompt? Yes,I'm entering correct credentials. I'm using credentials when I register application. On Aug 21, 11:56 am, Jason (Google) apija...@google.com wrote: This is probably a given, but are you certain that you're entering the correct credentials at the username and password prompt? The Google account has to match the one that you used to register the application (the same one that you're posting with). - Jason On Fri, Aug 21, 2009 at 11:53 AM, Jason (Google) apija...@google.comwrote: Your app configuration file looks good, so there must be something more insidious. Are you trying to deploy from Eclipse or using Ant? Have you tried both? And are you behind a proxy server by any chance? - Jason On Thu, Aug 20, 2009 at 1:10 AM, bb1987 bb1987 bbd1...@gmail.com wrote: My web.xml file contains: ?xml version=1.0 encoding=utf-8? appengine-web-app xmlns=http://appengine.google.com/ns/1.0; applicationbuildfunnyface/application version1/version !-- Configure java.util.logging -- system-properties property name=java.util.logging.config.file value=WEB-INF/ logging.properties/ /system-properties /appengine-web-app And my application ID is : buildfunnyface On Aug 19, 11:24 am, Jason apija...@google.com wrote: What is your application ID? Also, can you paste your appengine- web.xml file? Thanks, - Jason On Aug 18, 5:31 am, bb1987 bb1987 bbd1...@gmail.com wrote: Hello Today I have received Your Google App Engine Account has been enabled! email because I couldn't activated via sms. Then I registered my application. My project's application id and registered application is same. I read (Get 401Unauthorized on deploying ) discussion and checked all settings. But it always says 401Unauthorized I don't know what is wrong. Please give me hint. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google App Engine for Java group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~--~~~~--~~--~--~---
