How to use

setNull

method

in

org.dd4t.caching.CacheElement

/**
 * Store given item in the cache with a simple time-to-live property.
 *
 * @param key          String representing the key to store the payload under
 * @param cacheElement CacheElement a wrapper around the actual value to store in
 *                     cache
 */
@Override
public <T> void storeInItemCache(String key, CacheElement<T> cacheElement) {
  if (!isEnabled()) {
    return;
  }
  if (!cacheExists()) {
    LOG.error("Cache configuration is invalid! NOT Caching. Check EH Cache configuration.");
    return;
  }
  // detect undeclared nulls, complain, and set to null
  if (!cacheElement.isNull() && cacheElement.getPayload() == null) {
    Exception exToLogToHaveStacktraceWhoCausedIt = new Exception();
    LOG.error("Detected undeclared null payload on element with key " + key + " at insert time!",
        exToLogToHaveStacktraceWhoCausedIt);
    cacheElement.setNull(true);
  }
  cacheElement.setExpired(false);
  storeElement(key, cacheElement);
}

@Override
public <T> void storeInItemCache(String key, CacheElement<T> cacheElement, List<CacheDependency> dependencies) {
  if (!isEnabled()) {
    return;
  }
  if (!cacheExists()) {
    LOG.error("Cache configuration is invalid! NOT Caching. Check EH Cache configuration.");
    return;
  }
  // detect undeclared nulls, complain, and set to null
  if (!cacheElement.isNull() && cacheElement.getPayload() == null) {
    Exception exToLogToHaveStacktraceWhoCausedIt = new Exception();
    LOG.error("Detected undeclared null payload on element with key " + key + " at insert time!",
        exToLogToHaveStacktraceWhoCausedIt);
    cacheElement.setNull(true);
  }
  cacheElement.setExpired(false);
  Element element = cache.get(key);
  if (element == null) {
    element = new Element(key, cacheElement);
  }
  cache.put(element);
  element.setTimeToLive(cacheDependencyTTL);
  for (CacheDependency dep : dependencies) {
    String dependentKey = getKey(dep.getPublicationId(), dep.getItemId());
    cacheElement.setDependentKey(dependentKey);
    addDependency(key, dependentKey);
    updateTTL(dependencyCache.get(dependentKey));
  }
}

cacheElement.setNull(true);
cacheProvider.storeInItemCache(uri, cacheElement);
throw new ItemNotFoundException("Unable to find page by id " + uri);

@Override
public <T> void storeInItemCache(final String key, final CacheElement<T> cacheElement, final
List<CacheDependency> dependencies) {
  if (!isEnabled()) {
    return;
  }
  if (!cacheExists()) {
    LOG.error("Cache configuration is invalid! NOT Caching. Check EH Cache configuration.");
    return;
  }
  // detect undeclared nulls, complain, and set to null
  if (!cacheElement.isNull() && cacheElement.getPayload() == null) {
    Exception exToLogToHaveStacktraceWhoCausedIt = new Exception();
    LOG.error("Detected undeclared null payload on element with key " + key + " at insert time!",
        exToLogToHaveStacktraceWhoCausedIt);
    cacheElement.setNull(true);
    cacheElement.setExpired(true);
  }
  cacheElement.setExpired(false);
  if (cache.containsKey(key)) {
    cache.replace(key, cacheElement);
  } else {
    cache.put(key, cacheElement);
  }
  for (CacheDependency dep : dependencies) {
    String dependentKey = getKey(dep.getPublicationId(), dep.getItemId());
    cacheElement.setDependentKey(dependentKey);
    addDependency(key, dependentKey);
  }
}

cacheElement.setNull(true);
cacheProvider.storeInItemCache(key, cacheElement, publicationId, componentId);
throw new ItemNotFoundException(String.format("Could not find DCP with componentURI: %s and " +