[google-appengine] Remote API + File API
Hi,
Maybe I've misunderstood docs, but I thought it was possible an
external application to integrate with App Engine by creating a file
in Blobstore. Am I doing something wrong?? Any way to accomplish
this??
http://code.google.com/appengine/docs/java/blobstore/overview.html#Writing_Files_to_the_Blobstore
Thanks.
Code:
public class RemoteAPI {
public static void main(String[] args) throws IOException {
String username = "x...@gmail.com";
String password = "x";
RemoteApiOptions options = new RemoteApiOptions()
.server("primepartes.appspot.com", 443)
.credentials(username, password);
RemoteApiInstaller installer = new RemoteApiInstaller();
installer.install(options);
FileService fileService = FileServiceFactory.getFileService();
BlobstoreService blobstoreService =
BlobstoreServiceFactory.getBlobstoreService();
AppEngineFile file = fileService.createNewBlobFile("text/
plain");
FileWriteChannel writeChannel =
fileService.openWriteChannel(file, true);
PrintWriter out = new
PrintWriter(Channels.newWriter(writeChannel, "UTF8"));
out.println("The woods are lovely dark and deep.");
out.println("But I have promises to keep.");
out.close();
writeChannel.closeFinally(); // This line throwns the excepion
bellow
..
java.lang.IllegalStateException: The current request does not hold the
exclusive lock.
at
com.google.appengine.api.files.FileServiceImpl.close(FileServiceImpl.java:
315)
at
com.google.appengine.api.files.FileWriteChannelImpl.closeFinally(FileWriteChannelImpl.java:
78)
at br.com.teste.RemoteAPI.main(RemoteAPI.java:82)
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[google-appengine] Re: Remote API + File API
Without "out.close()" throws this exception on or
"writeChannel.closeFinally()":
Exception in thread "main" java.lang.IllegalStateException: The
current request does not hold the exclusive lock.
at
com.google.appengine.api.files.FileServiceImpl.close(FileServiceImpl.java:
315)
at
com.google.appengine.api.files.FileWriteChannelImpl.closeFinally(FileWriteChannelImpl.java:
78)
at br.com.teste.RemoteAPI.main(RemoteAPI.java:94)
Excuse me, bill is not enabled for my app, but exception should be
clear about this.
"Note: The Blobstore API is only available for apps with billing
enabled. You still get an amount of quota for free, but billing must
be enabled to use it."
http://code.google.com/appengine/docs/quotas.html#Blobstore
Thanks.
On 18 ago, 17:35, "Wen (Google)" wrote:
> I read the doc. you pointed out as such: when "out.close()" was
> called, the "writeChannel" was not closed; when "readChannel.close()"
> was called, the "reader" itself was not closed. So, looks like you
> only need to do one or the other. It may have to do with how closing
> is implemented on the channels.
>
> So remove "out.close()", and see if the exception would go away.
>
> Wen
>
> On Aug 18, 7:05 am, André Salvati wrote:
>
>
>
>
>
>
>
> > Hi,
>
> > Maybe I've misunderstood docs, but I thought it was possible an
> > external application to integrate with App Engine by creating a file
> > in Blobstore. Am I doing something wrong?? Any way to accomplish
> > this??
>
> >http://code.google.com/appengine/docs/java/blobstore/overview.html#Wr...
>
> > Thanks.
>
> > Code:
>
> > public class RemoteAPI {
>
> > public static void main(String[] args) throws IOException {
>
> > String username = "x...@gmail.com";
> > String password = "x";
>
> > RemoteApiOptions options = new RemoteApiOptions()
> > .server("primepartes.appspot.com", 443)
> > .credentials(username, password);
> > RemoteApiInstaller installer = new RemoteApiInstaller();
> > installer.install(options);
>
> > FileService fileService = FileServiceFactory.getFileService();
> > BlobstoreService blobstoreService =
> > BlobstoreServiceFactory.getBlobstoreService();
>
> > AppEngineFile file = fileService.createNewBlobFile("text/
> > plain");
>
> > FileWriteChannel writeChannel =
> > fileService.openWriteChannel(file, true);
>
> > PrintWriter out = new
> > PrintWriter(Channels.newWriter(writeChannel, "UTF8"));
> > out.println("The woods are lovely dark and deep.");
> > out.println("But I have promises to keep.");
>
> > out.close();
> > writeChannel.closeFinally(); // This line throwns the excepion
> > bellow
>
> > ..
>
> > java.lang.IllegalStateException: The current request does not hold the
> > exclusive lock.
> > at
> > com.google.appengine.api.files.FileServiceImpl.close(FileServiceImpl.java:
> > 315)
> > at
> > com.google.appengine.api.files.FileWriteChannelImpl.closeFinally(FileWriteC
> > hannelImpl.java:
> > 78)
> > at br.com.teste.RemoteAPI.main(RemoteAPI.java:82)
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[google-appengine] Re: How to set Task Queue order?
Hi Leandro, I've asked same question os stackoverflow. http://stackoverflow.com/questions/9982369/is-there-a-way-to-assure-fifo-first-in-first-out-behavior-with-task-queues-on Please star it ;) On Apr 4, 10:47 am, Leandro Rezende wrote: > Nicholas Verne, i will try the , what about the > order? > > as i read in doc, it says that is FIFO, but in my tests it was running in a > random order. > > thx > > 2012/4/4 David Hardwick > > > > > > > > > The Pipeline would be my recommendation. > > >http://code.google.com/p/appengine-pipeline/ > > > On Apr 4, 4:10 am, Nicholas Verne wrote: > > > You could add task 2 from task 1, add task 3 from task 2 etc. > > > > To prevent task2 starting before task1 finishes, set > > > max_concurrent_requests to 1 for the queue. > > > > Nick Verne > > > > On Wed, Apr 4, 2012 at 3:37 PM, Leandro Rezende > > > > wrote: > > > > im adding 10 taskes at the Queue, but i would like to a Task wait the > > > > previous task finish before it run.. > > > > > Example: > > > > > - Added 10 tasks. > > > > - Task 1 Run > > > > - Task 1 Finish > > > > - Task 2 Begin > > > > - Task 2 Finish > > > > - Task 3 Begin > > > > - .. > > > > > is it possible? > > > > > Leandro > > > > > -- > > > > You received this message because you are subscribed to the Google > > Groups > > > > "Google App Engine" group. > > > > To post to this group, send email to google-appengine@googlegroups.com > > . > > > > To unsubscribe from this group, send email to > > > > google-appengine+unsubscr...@googlegroups.com. > > > > For more options, visit this group at > > > >http://groups.google.com/group/google-appengine?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google App Engine" group. > > To post to this group, send email to google-appengine@googlegroups.com. > > To unsubscribe from this group, send email to > > google-appengine+unsubscr...@googlegroups.com. > > For more options, visit this group at > >http://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
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