How to use

cacheExists

method

in

org.dd4t.caching.providers.EHCache3Provider

@Override
public void flush() {
  if (!isEnabled()) {
    return;
  }
  if (!cacheExists()) {
    LOG.error("Cache configuration is invalid! NOT Caching. Check EH Cache configuration.");
    return;
  }
  LOG.info("Expiring all items in cache");
  cache.clear();
  LOG.info("Expiring all items in dependency cache");
  dependencyCache.clear();
}

@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);
  }
}