@ronnie09 ,
I see some problems in your code. I do not see session.save(); and also, I do not an example of how you have obtained thee Node.class. Below is some example code that you can try; however, please keep in mind that you need to create your own service user.
Map<String, Object> param = new HashMap<String, Object>();
param.put(ResourceResolverFactory.SUBSERVICE, "myServiceUser");
ResourceResolver resourceResolver = null;
try {
resourceResolver = resourceFactory.getServiceResourceResolver(param);
Resource pageResource = resourceResolver.getResource("/content/my-site/en/home");
Node myPageNode = pageResource.adaptTo(Node.class);
myPageNode.setProperty("nameAs", "brian");
Session session = resourceResolver.adaptTo(Session.class);
session.save();
} catch (Exception exception) {
exception.printStackTrace();
}