{


        String filename = request.getHeader("X-File-Name");
        if (filename) {
            def webRootDir = servletContext.getRealPath("/")
            def userDir = new File(webRootDir, "/zalaczniki/${params.id}")
            userDir.mkdirs()
            String hashCode= System.currentTimeMillis()

            def is = request.getInputStream()
            def file = new File(userDir, hashCode + "_" + filename)
            def fos = new FileOutputStream(file)
            IOUtils.copy(is, fos)
            is.close()
            fos.close()

Attachement attachement = new Attachement(user: session.user.toString(), fileName: file.name, fileHash: hashCode, fileSize: file.length(), fileType: new MimetypesFileTypeMap().getContentType(file))
            try {
        ServiceAction.withTransaction { status ->
            ServiceAction action = ServiceAction.get(Long.parseLong(params.param1))

                    action.addToFiles(attachement)
                    if (action.save(flush: true)) {
                        render "{'success': 'true'}"
                    }
        }
            } catch (StaleObjectStateException e) {
                log.debug 'alojz'
                boolean success = false
                for (int i = 0; i < 10; i++) {
                    try {
        ServiceAction.withTransaction { status ->
            ServiceAction action = ServiceAction.get(Long.parseLong(params.param1))

                    action.addToFiles(attachement)
                    action.save(flush: true)
        }

                        success = true
                        break;
                    } catch (StaleObjectStateException e2) {}
                }
                if (!success) throw e
                else render "{'success': 'true'}"
            }
        }
    }