/wro4j-core/src/main/java/ro/isdc/wro/model/group/processor/PreProcessorExecutor.java
futures.add( executor.submit( decoratedCallable) ) ;
futures.add ( exec.submit ( decoratedCallable ) ) ;
}); } final ExecutorService exec = getExecutorService(); final List<Future<String>> futures = new ArrayList<Future<String>>(); for (final Callable<String> callable : callables) { final Callable<String> decoratedCallable = new ContextPropagatingCallable<String>(callable); <extra_id_0> } for (final Future<String> future : futures) { try { result.append(future.get()); } catch (final Exception e) { final Throwable cause = e.getCause();