New item in a Map set as an attribute in session are not updated in remote cached session with version 14.0.7

[davidmestr]

In version 14.0.7, the way of save InfinispanSession (in org.infinispan.spring.common.session.AbstractInfinispanSessionRepository) has changed. So, there is a new mechanism that detect the changes in session and only update them.

In older versions I can add a new item to an existent Map in session and it is saved in remote cache and can be recovered in next request. The problem is that with new version, the item is only cached if the map is explicitly set as attribute.

As example:

  protected void doGet(final HttpServletRequest request, final HttpServletResponse response) {
    final Map<String, String> map;
    HttpSession ses = request.getSession(false);
    if (ses == null) {
      ses = request.getSession(true);
      map = new HashMap<>();
      ses.setAttribute("MAP", map);
    } else {
      map = (Map<String, String>) ses.getAttribute("MAP");
      if (map.get("new item") == null) {
        LOG.info("create item");
        map.put("new item", "new value");
      }
    }
  }
}

The session is created in the first call. In the following calls the "new item" is always created because it is never found in session.

Are there some configuration or workaround to keep the behaviour of previous versions?

[tristantarrant]

Maybe I should bring in @thelateperseus who made the latest modifications to the Spring Session code.

[thelateperseus]

@davidmestr you can call setSaveMode(SaveMode.ALWAYS) on AbstractInfinispanSessionRepository to ensure that the session is always saved at the end of the request processing. From the Javadoc in SaveMode:

Always save all session attributes, regardless of the interaction with the session. In highly concurrent environments, this mode increases the risk of attributes being overwritten during processing of parallel requests.

[davidmestr]

Thank you. I can see that may be SaveMode.ON_GET_ATTRIBUTE works for us too