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);
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 Donnelson
http://gwt-examples.googlecode.com
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