Upload image doesn't work ?

General
1

I created a image upload using submitUpload() does work when I click in my Button but when I add the submitUpload() in a method doesn’t.

This is the class I am using:



// save image Receiver
public class ImageUpload implements Receiver{
   private File file;
   private String foto;
   private final String path = "/home/fernando/curriculum/";
   private String cpf;

/** add cpf document */
public void setCpf(String cpf){
    this.cpf = cpf;
}

/** save image */
@Override
public OutputStream receiveUpload(String filename, String mimeType) {       
    FileOutputStream fos = null;                
    try{
        file = new File(filename);          
        if(file.getName().endsWith("jpg")){             
            String cpfNumeros = this.cpf.replaceAll("\\.", "").replace("-", ""); //remove mask cpf
            String[] imagem = filename.split("\\."); //get jpg
            String novaImagem = cpfNumeros + "." + imagem[1]
; // define name new image

            // new image                
            File newFile = new File(path + novaImagem);
            if(newFile.exists()){
                newFile.delete();                   
            }
            fos = new FileOutputStream(newFile); //salva imagem             
        }else{
            new Notification("Erro de arquivo<br/>", 
                            "Somente arquivos jpg são permitidos", 
                            Notification.Type.ERROR_MESSAGE)
                            .show(Page.getCurrent());
        }           
    }catch(FileNotFoundException ex){
        new Notification("File not found<br/>", 
                     ex.getLocalizedMessage(), 
                     Notification.Type.ERROR_MESSAGE)
                     .show(Page.getCurrent());
        return null;
    }
    return fos;
}   
}


//view
public class ImageUploadView extends CustomComponents {      
    //upload image
    ImageUpload imageUpload = new ImageUpload();
    final Upload upload = new Upload("", imageUpload);
    upload.setCaption("Image");     
    upload.setButtonCaption(null);  
    mainLayout.addComponent(upload);

    Button btnSave = new Button("Save");
    btnSave.addClickListener(new Button.ClickListener() {
        @Override
        public void buttonClick(ClickEvent event) {
            save(); //call save method          
        }
    });

}

/** save informations on db and save image of user */
private void save(){
     if(!cpf.getValue().trim().isEmpty()){
          imageUpload.setCpf(cpf.getValue());
          upload.submitUpload();     
     }
}

If I call the method save the submitUpload() doesn’t work, but when I test submitUpload() directly on Button listener does work.

Any idea ?