Examples of javax.cache.Cache$EntryProcessor

javax.cache.Cache
Allows execution of code which may mutate a cache entry with exclusive access (including reads) to that entry.
Any mutations will not take effect till after the processor has completed; if an exception thown inside the processor, no changes will be made to the cache.
This enables a way to perform compound operations without transactions involving a cache entry atomically. Such operations may include mutations.
The mutations can be potentially done in place avoiding expensive network transfers. An example is a value which is a list and you simply want to append a new element to it.
An entry processor cannot invoke any cache operations, including processor operations.
If executed in a JVM remote from the one invoke was called in, an EntryProcessor equal to the local one will execute the invocation. For remote to execution to succeed, the EntryProcessor implementation class must be in the excecuting class loader as must K and V if {@link Cache.MutableEntry#getKey()} or {@link Cache.MutableEntry#getValue()}is invoked. @param < K> the type of keys maintained by this cache @param < V> the type of cached values @author Greg Luck @author Yannis Cosmadopoulos

  @SuppressWarnings("unchecked")
  public void setImage(Image image) {
    if (image != null) {
      try {
        CacheFactory cacheFactory = CacheManager.getInstance().getCacheFactory();
        Cache cache = cacheFactory.createCache(Collections.emptyMap());
        cache.put(value, image);
      } catch (CacheException e) {
        logger.error(e.getMessage(), e);
      }
    } else if (value != null) {
      image = findImage(value);

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  public static Image findImage(String value) {
    if (value != null) {
      try {
        CacheFactory cacheFactory = CacheManager.getInstance().getCacheFactory();
        Cache cache = cacheFactory.createCache(Collections.emptyMap());
        return (Image) cache.get(value);
      } catch (CacheException e) {
        logger.error(e.getMessage(), e);
      }
    }
    return null;

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    }
  }


  private void listeVolHistoric(HttpServletRequest request,HttpServletResponse response) throws IOException {
    try {
      Cache cache = DatacacheSingleton.getInstance();
    
      PreparedQuery preparedHistoricQuery = VolDAO.getSearchVol((String)cache.get("leavingFrom"),(String)cache.get("goingTo"),(Date)cache.get("departure")); 
      JSONObject search = new JSONObject();
      search.put("leaving", (String)cache.get("leavingFrom"));
      search.put("going", (String)cache.get("goingTo"));
      search.put("time", new SimpleDateFormat("HH:mm").format((Date)cache.get("departure")));
      search.put("date", new SimpleDateFormat("yyyy-MM-dd").format((Date)cache.get("departure")));
      cache.clear();
      JSONArray volHistoricList = new JSONArray();
      volHistoricList.put(search);
      for(Entity result : preparedHistoricQuery.asIterable())
      {        
        JSONObject vol = new JSONObject();

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    return datastore.put(newSearch);
  }


  public static void updateSearch(Key searchKey) throws EntityNotFoundException, CacheException {
    DatastoreService datastore = DatastoreSingleton.getInstance();  
    Cache cache = DatacacheSingleton.getInstance();
    Entity search = datastore.get(searchKey);
    cache.put("departure", search.getProperty("departure"));
    cache.put("goingTo", search.getProperty("goingTo"));
    cache.put("leavingFrom", search.getProperty("leavingFrom"));
    search.setProperty("date", new Date());
    datastore.put(search);
  }

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