private byte[] readBlob(final Long blobId) {
try (BlobReader readBlob = blobstore.readBlob(blobId)) {
int blobSize = (int) readBlob.getSize();
byte[] result = new byte[blobSize];
readBlob.read(result, 0, blobSize);
return result;
}
}
private Long createBlob(final InputStream inputStream) {
Objects.requireNonNull(inputStream, "inputStream cannot be null");
try (BlobAccessor blobAccessor = blobstore.createBlob()) {
int nRead;
byte[] data = new byte[BUFFER_SIZE];
while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
blobAccessor.write(data, 0, nRead);
}
return blobAccessor.getBlobId();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private Attachment createAttachment(
final Long blobId, final String contentType, final String name) {
InputStreamSupplier inputStreamSupplier = null;
if (blobId != null) {
inputStreamSupplier =
() -> {
BlobReader readBlob = blobstore.readBlob(blobId);
return new BlobInputStream(readBlob);
};
}
Attachment attachment =
new Attachment()
.withContentType(contentType)
.withName(name)
.withInputStreamSupplier(inputStreamSupplier);
return attachment;
}
private void deleteBlob(final Long blobId) {
blobstore.deleteBlob(blobId);
}