How to use

getActiveEngineNames

method

in

org.apache.stanbol.enhancer.servicesapi.impl.EnginesTracker

private void update() throws ChainException {
  Set<String> activeEngineNames = new HashSet<String>(tracker.getActiveEngineNames());
  if(activeEngineNames.isEmpty()){
    throw new ChainException("Currently there are no active EnhancementEngines available");
  }
  List<EnhancementEngine> activeEngines = new ArrayList<EnhancementEngine>(activeEngineNames.size());
  Iterator<String> names = activeEngineNames.iterator();
  while(names.hasNext()){
    String name = names.next();
    EnhancementEngine engine = tracker.getEngine(name);
    if(engine != null){
      activeEngines.add(engine);
    } else { //looks like the config has changed in the meantime
      names.remove();
    }
  }
  Set<String> emptySet = Collections.emptySet();
  executionPlan = calculateExecutionPlan(
    getName(),activeEngines, 
    emptySet,//this Chain does not support optional engines
    emptySet); //only active meaning that no engines are missing
  engineNames = Collections.unmodifiableSet(activeEngineNames);
}