On Apr 26, 7:42 am, branflake2267 <branflake2...@gmail.com> wrote:
> My code snippet that procured the above trace:
>
> public long uploadBlob_ByFile(long fileThingId, String fileName, String
> contentType, byte[] filebytes) {
> if (filebytes == null || filebytes.length == 0) {
> log.warning("uploadBlob_ByFile(): Warn: filebytes is null or length=0");
> return -1;
> }
>
> log.info("uploadBlob_ByFile(): filebytes.length=" + filebytes.length);
>
> // Get a file service
> FileService fileService = FileServiceFactory.getFileService();
>
> // Create a new Blob file with mime-type
> AppEngineFile file = null;
> try {
> file = fileService.createNewBlobFile(contentType, fileName);
> } catch (IOException e) {
> log.severe("uploadBlob_ByFile(): Error 1: could not
> fileService.createNewBlobFile: " + e.toString());
> e.printStackTrace();
> return 0;
> }
>
> if (file == null) {
> log.severe("uploadBlob_ByFile(): Error: file is null. exiting file
> upload.");
> return 0;
> }
>
> // Open a channel to write to it
> boolean lock = true;
> FileWriteChannel writeChannel = null;
> try {
> writeChannel = fileService.openWriteChannel(file, lock);
> } catch (FileNotFoundException e) {
> e.printStackTrace();
> log.severe("uploadBlob_ByFile(): Error 2:" + e.toString());
> return 0;
> } catch (FinalizationException e) {
> e.printStackTrace();
> } catch (LockException e) {
> log.severe("uploadBlob_ByFile(): Error 3:" + e.toString());
> e.printStackTrace();
> return 0;
> } catch (IOException e) {
> log.severe("uploadBlob_ByFile(): Error 4:" + e.toString());
> e.printStackTrace();
> return 0;
> }
>
> ByteBuffer bb = ByteBuffer.wrap(filebytes);
>
> // This time we write to the channel using standard Java
> try {
> writeChannel.write(bb);
> } catch (IOException e) {
> log.severe("uploadBlob_ByFile(): Error 5:" + e.toString());
> e.printStackTrace();
> return 0;
> }
>
> BlobKey blobKey = FileServiceFactory.getFileService().getBlobKey(file);
At this point the file has not been finalized so null will be
returned. See
http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/files/FileService.html#getBlobKey(com.google.appengine.api.files.AppEngineFile)
> if (blobKey == null) {
> log.severe("uploadBlob_ByFile(): Error 5.1, Testing if blobKey is null
> before closing channel: ");
> } else {
> log.info("uploadBlob_ByFile(): INFO 5.1, blobkey WORKED
> !!!!!!!!!!!!!!!!! ");
> }
>
> try {
> writeChannel.close();
> } catch (IOException e) {
> log.severe("uploadBlob_ByFile(): Error 5.5:" + e.toString());
> e.printStackTrace();
> }
>
> // Now finalize
> try {
> writeChannel.closeFinally();
> } catch (IllegalStateException e) {
> log.severe("uploadBlob_ByFile(): Error 6:" + e.toString());
> e.printStackTrace();
> return 0;
> } catch (IOException e) {
> log.severe("uploadBlob_ByFile(): Error 7:" + e.toString());
> e.printStackTrace();
> return 0;
> }
>
> blobKey = FileServiceFactory.getFileService().getBlobKey(file);
>
> FileSystem fileSytem = file.getFileSystem();
> String path = file.getFullPath();
> String namePart = file.getNamePart();
>
> String fs = "null";
> if (fileSytem != null) {
> fs = fileSytem.toString();
> }
>
> log.info("uploadBlob_ByFile(): Info: fileSystem: " + fs + " path=" + path
> + " namePart=" + namePart + " file.toString()=" + file.toString());
>
> if (blobKey == null) {
> log.severe("uploadBlob_ByFile(): Error 8: blobkey is null");
> return 0;
> }
> //...
>
> }
>
> Brandon Donnelsonhttp://gwt-examples.googlecode.com
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