I'm a bit confused by your statement.
If you want to run in the DevAppserver or in AppEngine then you don't need
to use the LocalServiceTestHelper at all. The LocalExample only does that
as a demo of how to run it as a local executable or if you want to use it
within Junit.
If you don't include such a line, like in GcsExampleServlet then it should
work as part of your deployed application.
On Thu, Nov 21, 2013 at 3:41 PM, Ken Bowen <k...@form-runner.com> wrote:
> Thanks Tom.
> I went through pretty much the same servlet exercise a couple of hours
> before seeing your post this afternoon.
> The problem was that I missed the point the the docs that the code /must/
> run in a servlet.
> (I'm not clear where it's stated, but I guessed from the comment about the
> test harness in LocalExample.)
> I assumed that it would be ok to run in a deployed app on AppEngine.
> Thanks again,
> --Ken
>
> On Nov 21, 2013, at 2:51 PM, Tom Kaitchuck wrote:
>
> > Using the 1.8.8 version of the SDK and depending on appengine-gcs-client
> 0.3.3, the following servlet based on your above example works:
> >
> > public class GcsTest extends HttpServlet {
> > private void writeToFile(GcsService gcsService, GcsFilename
> fullGcsFilename, byte[] content)
> > throws IOException {
> > System.out.println("writeToFile:full=" + fullGcsFilename.toString());
> > GcsOutputChannel outputChannel =
> > gcsService.createOrReplace(fullGcsFilename,
> GcsFileOptions.getDefaultInstance());
> > outputChannel.write(ByteBuffer.wrap(content));
> > outputChannel.close();
> > }
> >
> >
> > private byte[] readFromFile(GcsService gcsService, GcsFilename
> fullGcsFilename)
> > throws IOException {
> > System.out.println("readFromFile:full=" +
> fullGcsFilename.toString());
> > int fileSize = (int)
> gcsService.getMetadata(fullGcsFilename).getLength();
> > ByteBuffer result = ByteBuffer.allocate(fileSize);
> > GcsInputChannel readChannel =
> gcsService.openReadChannel(fullGcsFilename, 0);
> > try {
> > readChannel.read(result);
> > } finally {
> > readChannel.close();
> > }
> > return result.array();
> > }
> >
> > @Override
> > public void doGet(HttpServletRequest req, HttpServletResponse resp)
> throws IOException {
> > GcsService gcsService = GcsServiceFactory.createGcsService();
> > GcsFilename fullGcsFilename = new GcsFilename("Foo", "Bar");
> > byte[] content = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
> > writeToFile(gcsService, fullGcsFilename, content);
> > byte[] result = readFromFile(gcsService, fullGcsFilename);
> > PrintWriter writer = resp.getWriter();
> > writer.append(Arrays.toString(content));
> > writer.append(Arrays.toString(result));
> > }
> > }
> >
> > I'm not really sure what could be different about your setup to cause
> that. Try creating a new project with the minimal possible dependencies and
> run the servlet above and see what happens.
> >
> >
> >
> > On Tue, Nov 19, 2013 at 12:57 PM, <k...@form-runner.com> wrote:
> > I've encountered a problem using the Google Cloud Storage GCS Client
> API, running on the local development server. I'm trying to write the
> bytes from a PDF file, and then read them back.
> >
> > The code appears to write the (local fake)GCS file ok: (1) There appears
> to be an appropriate entry in the Development Console, and (2) there's a
> physical file in ~war/WEB-APP/appengine-generated (details below).
> However, when I attempt to read the bytes from the GCS file, it throws a
> FileNotFound exception when it attempts to get the metadata (filesize).
> >
> > First, here's the core code, versions of GCS client read/write, with my
> debugging stmts left in for reference:
> >
> > private void writeToFile(GcsFilename fullGcsFilename, byte[] content)
> > throws IOException
> > {
> > System.out.println("writeToFile:full="+fullGcsFilename.toString());
> > GcsOutputChannel outputChannel =
> > gcsService.createOrReplace(fullGcsFilename,
> GcsFileOptions.getDefaultInstance());
> > outputChannel.write(ByteBuffer.wrap(content));
> > outputChannel.close();
> > }
> >
> > private byte[] readFromFile(GcsFilename fullGcsFilename)
> > throws IOException
> > {
> > System.out.println("readFromFile:full="+fullGcsFilename.toString());
> > int fileSize = (int)
> gcsService.getMetadata(fullGcsFilename).getLength(); [*][Exception thrown
> here]
> > ByteBuffer result = ByteBuffer.allocate(fileSize);
> > GcsInputChannel readChannel =
> gcsService.openReadChannel(fullGcsFilename, 0);
> > try {
> > readChannel.read(result);
> > } finally {
> > readChannel.close();
> > }
> > return result.array();
> > }
> >
> > Here's the debugging output (in/out filenames appear to be the same):
> > ----
> > writeToFile:full=GcsFilename(formrunnerbucket-r7yh23nb2,
> FA/MasterFormStore-6649846324789248)
> >
> > ----
> > readFromFile:full=GcsFilename(formrunnerbucket-r7yh23nb2,
> FA/MasterFormStore-6649846324789248)
> >
> > ----
> > Here's the observed results:
> >
> > IN ~war/WEB-APP/appengine-generated:
> >
> > -rw-r--r-- 1 ken staff 1679407 Nov 19 09:19
> encoded_gs_key:L2dzL2Zvcm1ydW5uZXJidWNrZXQtcjd5aDIzbmIyL0ZBL01hc3RlckZvcm1TdG9yZS02NjQ5ODQ2MzI0Nzg5MjQ4
> > This is the expected PDF file, which can be opened (with Preview on a
> Mac).
> >
> > ----
> > In the Development Console (http://localhost:8888/_ah/admin/datastore):
> > In __GsFileInfo__ (in the empty Namespace)
> >
> > Key:
> ag5mb3JtcnVubmVyLWhyZHJ7CxIOX19Hc0ZpbGVJbmZvX18iZ2VuY29kZWRfZ3Nfa2V5OkwyZHpMMlp2Y20xeWRXNXVaWEppZFdOclpYUXRjamQ1YURJemJtSXlMMFpCTDAxaGMzUmxja1p2Y20xVGRHOXlaUzAyTmpRNU9EUTJNekkwTnpnNU1qUTQM
> >
> > ID/Name:
> encoded_gs_key:L2dzL2Zvcm1ydW5uZXJidWNrZXQtcjd5aDIzbmIyL0ZBL01hc3RlckZvcm1TdG9yZS02NjQ5ODQ2MzI0Nzg5MjQ4
> >
> > content_type: application/octet-stream
> >
> > filename:
> /gs/formrunnerbucket-r7yh23nb2/FA/MasterFormStore-6649846324789248
> >
> > size: 1679407
> >
> > [[The ID/Name appears to be identical to the filename appearing in
> ~war/WEB-APP/appengine-generated]]
> >
> > ---------------
> > In the Development Console (http://localhost:8888/_ah/admin/datastore),
> in Namespace 5629499534213120 (where everything ran):
> > In _ah_FakeCloudStorate_formrunnerbucket-r7yh23nb2:
> >
> > Key:
> ag5mb3JtcnVubmVyLWhyZHJZCxIwX2FoX0Zha2VDbG91ZFN0b3JhZ2VfX2Zvcm1ydW5uZXJidWNrZXQtcjd5aDIzbmIyIiNGQS9NYXN0ZXJGb3JtU3RvcmUtNjY0OTg0NjMyNDc4OTI0OAyiARA1NjI5NDk5NTM0MjEzMTIw
> >
> > ID/Name: FA/MasterFormStore-6649846324789248
> >
> > options: <Blob: 483 bytes>
> >
> > ---------------
> > Here's the exception thrown in readFromFile above, at:
> >
> > int fileSize = (int)
> gcsService.getMetadata(fullGcsFilename).getLength(); [*][Exception thrown
> here]
> >
> > java.lang.RuntimeException: java.io.FileNotFoundException
> > at
> com.formrunner.pdf.PDFMaker.makePDFfromFormInstance(PDFMaker.java:132)
> > .........
> > Caused by: java.io.FileNotFoundException
> > at
> com.google.appengine.api.files.FileServiceImpl.translateException(FileServiceImpl.java:614)
> > at
> com.google.appengine.api.files.FileServiceImpl.makeSyncCall(FileServiceImpl.java:593)
> > at
> com.google.appengine.api.files.FileServiceImpl.stat(FileServiceImpl.java:383)
> > at
> com.google.appengine.tools.cloudstorage.dev.LocalRawGcsService.getObjectMetadata(LocalRawGcsService.java:215)
> > at
> com.google.appengine.tools.cloudstorage.GcsServiceImpl$2.run(GcsServiceImpl.java:73)
> > at
> com.google.appengine.tools.cloudstorage.GcsServiceImpl$2.run(GcsServiceImpl.java:70)
> > at
> com.google.appengine.tools.cloudstorage.RetryHelper.doRetry(RetryHelper.java:93)
> > at
> com.google.appengine.tools.cloudstorage.RetryHelper.runWithRetries(RetryHelper.java:138)
> > at
> com.google.appengine.tools.cloudstorage.GcsServiceImpl.getMetadata(GcsServiceImpl.java:70)
> > at
> com.formrunner.data.GoogleCloudStorage.readFromFile(GoogleCloudStorage.java:62)
> > at
> com.formrunner.data.GoogleCloudStorage.getBytesAt(GoogleCloudStorage.java:55)
> > at
> com.formrunner.db.MasterFormStore.getContent(MasterFormStore.java:92)
> > at com.formrunner.forms.FormUtils.getFormBlob(FormUtils.java:314)
> > at
> com.formrunner.pdf.PDFUtils.getPDFDocFromInstance(PDFUtils.java:50)
> > at
> com.formrunner.pdf.PDFMaker.makePDFfromFormInstance(PDFMaker.java:75)
> >
> > It may be worth noting that the LocalExample from the GCS Client API
> runs fine, but does not leave any trace in the
> > folder ~war/WEB-APP/appengine-generated nor in the Development Consolte
> (so far as I can find).
> >
> > I hope someone can point out to me where I'm stumbling.
> > Thanks in advance,
> > Ken Bowen
> >
> >
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