wro4j-core/src/main/java/ro/isdc/wro/model/resource/support/change/ResourceWatcher.java
public void check(final CacheKey cacheKey, final Callback callback) {
    notNull(cacheKey);
    LOG.debug("started");
    final StopWatch watch = new StopWatch();
    watch.start("detect changes");
    try {
      final Group group = new WroModelInspector(modelFactory.create()).getGroupByName(cacheKey.getGroupName());
      if (isGroupChanged(group.collectResourcesOfType(cacheKey.getType()), callback)) {
        callback.onGroupChanged(cacheKey);
        cacheStrategy.put(cacheKey, null);
      }
      resourceChangeDetector.reset();
    } catch (final Exception e) {
      onException(e);
    } finally {
      watch.stop();
      LOG.debug("resource watcher info: {}", watch.prettyPrint());
    }
  }
public void check(final CacheKey cacheKey, final Callback callback) {
    notNull(cacheKey);
    LOG.debug("started");
    final StopWatch watch = new StopWatch();
    watch.start("detect changes");
    try {
      final Group group = new WroModelInspector(modelFactory.create()).getGroupByName(cacheKey.getGroupName());
      if (isGroupChanged(group.collectResourcesOfType(cacheKey.getType()), callback)) {
        callback.onGroupChanged(cacheKey);
        cacheStrategy.put(cacheKey, null);
      }
      resourceChangeDetector.reset();
    } catch (final Exception e) {
      onException(e);
    } finally {
      watch.stop();
      LOG.debug("resource watcher info: {}", watch.prettyPrint());
    }
  }
public void check ( final CacheKey cacheKey , final Callback callback ) { notNull ( cacheKey ) ; LOG . debug ( "started" ) ; final StopWatch watch = new StopWatch ( ) ; watch . start ( "detect changes" ) ; try { final Group group = new WroModelInspector ( modelFactory . create ( ) ) . getGroupByName ( cacheKey . getGroupName ( ) ) ; if ( isGroupChanged ( group . collectResourcesOfType ( cacheKey . getType ( ) ) , callback ) ) { callback . onGroupChanged ( cacheKey ) ; cacheStrategy . put ( cacheKey , null ) ; } resourceChangeDetector . reset ( ) ; } catch ( final Exception e ) { onException ( e ) ; } finally { watch . stop ( ) ; LOG . debug ( "resource watcher info: {}" , watch . prettyPrint ( ) ) ; } }
Check if resources from a group were changed. If a change is detected, the changeListener will be invoked.

@param cacheKey
the cache key which was requested. The key contains the groupName which has to be checked for changes.
Check if resources from a group were changed . If a change is detected the changeListener will be invoked .