<h:commandButton image="#{gotov_data.status}" actionListener="#{image.Izmenit}" >
           <f:attribute name="serv" value="148" />
           <f:attribute name="ra" value="#{check_Session.ra }" />
</h:commandButton>

public void Izmenit(ActionEvent event) throws Exception {

        String serv = (String) event.getComponent().getAttributes().get("serv");
        String ra = (String) event.getComponent().getAttributes().get("ra");
...........
}

public String getStatus(String ra) throws Exception {

   
    
    String status = ra;
.......................
....................

        return status;
}