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7.2. Collections

For this tutorial, start two instances of the demo GUI. In this tutorial, we will:

  • Attach a POJO to the cache and see it being replicated.
  • Set a Collection attribute in this POJO
  • Manipulate this Collection attribute and see the changes visible in the GUI and being replicated
  • Detach a POJO from the cache.

  1. In the 1st GUI instance, create a POJO with a Collection attribute: 
       joe = new Person();
   joe.setName("Joe Black");

   lang = new ArrayList();
   lang.add("Spanish");

   joe.setLanguages(lang);
  2. Attach the POJO to the cache: 
       cache.attach("pojo/joe", joe);
  3. Get a proxy reference to the Collection and add a new element to it: 
       proxyLang = joe.getLanguages();
   proxyLang.add("English");
  4. Detach the pojo from the cache: 
       cache.detach("pojo/joe");
  5. Use the proxy reference to the Collection to add another element and see how this does not get added to the cache: 
       proxyLang.add("French");