/**
 * Creates a temporary file.
 *
 * @return a new Temp File from getDiskFilename(), default prefix, postfix and baseDirectory
 */
static synchronized File tempFile(HttpServerFileUpload upload) {
    String newpostfix;
    String diskFilename = new File(upload.filename()).getName();
    newpostfix = '_' + diskFilename;
    File tmpFile;
    try {
        if (baseDirectory == null) {
            // create a temporary file
            tmpFile = File.createTempFile(prefix, newpostfix);
        } else {
            tmpFile = File.createTempFile(prefix, newpostfix, new File(
                    baseDirectory));
        }
        if (deleteOnExitTemporaryFile) {
            tmpFile.deleteOnExit();
        }
        return tmpFile;
    } catch (IOException e) {
        // Really bad, can't create the tmp file.
        throw new IllegalStateException(e);
    }

}
 

@Override
public HttpServerRequest uploadHandler(Handler<HttpServerFileUpload> handler) {
    delegate.uploadHandler(handler);
    if (!userSetState) {
        delegate.resume();
    }
    return this;
}
 

/**
 * Creates an instance of {@link org.wisdom.framework.vertx.file.VertxFileUpload}.
 *
 * @param vertx     the Vert.X instance
 * @param upload    the upload object
 * @param limitSize the threshold. If the amount of uploaded data is below this limit,
 *                  {@link org.wisdom.framework.vertx.file.MemoryFileUpload} is used to backend the uploaded file.
 *                  Otherwise, it uses a {@link org.wisdom.framework.vertx.file.DiskFileUpload}.
 */
public MixedFileUpload(final Vertx vertx,
                       final HttpServerFileUpload upload,
                       final long limitSize,
                       final long maxSize,
                       final Handler<Result> errorHandler) {
    super(upload, errorHandler);
    delegate = new MemoryFileUpload(upload, errorHandler);

    upload.exceptionHandler(event -> LoggerFactory.getLogger(MixedFileUpload.class)
            .error("Cannot read the uploaded item {} ({})", upload.name(), upload.filename(), event))
            .endHandler(event -> delegate.close())
            .handler(
                    event -> {
                        if (event != null) {
                            // We are still in memory.
                            if (delegate instanceof MemoryFileUpload) {
                                MemoryFileUpload mem = (MemoryFileUpload) delegate;
                                checkSize(mem.buffer.length() + event.length(), maxSize, upload);
                                if (mem.buffer.length() + event.length() > limitSize) {
                                    // Switch to disk file upload.
                                    DiskFileUpload disk = new DiskFileUpload(vertx, upload, errorHandler);
                                    // Initial push (mem + current buffer)
                                    disk.push(mem.buffer.appendBuffer(event));
                                    // No cleanup required for the memory based backend.
                                    delegate = disk;

                                    // the disk based implementation use a pump.
                                } else {
                                    delegate.push(event);
                                }
                            }
                        }
                    }
            );
}
 

@Override
public HttpServerRequest uploadHandler(Handler<HttpServerFileUpload> handler) {
    delegate.uploadHandler(handler);
    return this;
}
 

@Override
public HttpServerRequest uploadHandler(Handler<HttpServerFileUpload> handler) {
    delegate.uploadHandler(handler);
    return this;
}
 

public FileUploadImpl(String uploadedFileName, HttpServerFileUpload upload) {
  this.uploadedFileName = uploadedFileName;
  this.upload = upload;
}
 

/**
 * Checks whether we exceed the max allowed file size.
 *
 * @param newSize the expected size once the current chunk is consumed
 * @param maxSize the max allowed size.
 * @param upload  the upload
 */
private void checkSize(long newSize, long maxSize, HttpServerFileUpload upload) {
    if (maxSize >= 0 && newSize > maxSize) {
        upload.handler(null);
        report(new IllegalStateException("Size exceed allowed maximum capacity"));
    }
}
 

/**
 * Creates an instance of {@link org.wisdom.framework.vertx.file.DiskFileUpload}.
 *
 * @param vertx        the Vert.X instance
 * @param upload       the Vert.X file upload object
 * @param errorHandler the error handler
 */
public DiskFileUpload(Vertx vertx, HttpServerFileUpload upload, Handler<Result> errorHandler) {
    super(upload, errorHandler);
    this.file = tempFile(upload);
    this.vertx = vertx;
}
 

/**
 * Creates an instance of {@link org.wisdom.framework.vertx.file.MemoryFileUpload}.
 *
 * @param upload       the Vert.X file upload object
 * @param errorHandler the error handler
 */
public MemoryFileUpload(HttpServerFileUpload upload, Handler<Result> errorHandler) {
    super(upload, errorHandler);

}
 

/**
 * Creates the {@link org.wisdom.framework.vertx.file.VertxFileUpload}.
 *
 * @param upload       the {@link HttpServerFileUpload} that is uploaded.
 * @param errorHandler the error handler.
 */
protected VertxFileUpload(HttpServerFileUpload upload, Handler<Result> errorHandler) {
    this.upload = upload;
    this.errorHandler = errorHandler;
}