/** * Perform scanning of classes for annotations * * @param context * @throws Exception */ protected void scanForAnnotations(WebAppContext context) throws Exception { AnnotationParser parser = createAnnotationParser(); _parserTasks = new ArrayList<ParserTask>(); long start = 0; if (LOG.isDebugEnabled()) LOG.debug( "Annotation scanning commencing: webxml={}, metadatacomplete={}, configurationDiscovered={}, multiThreaded={}, maxScanWait={}", context.getServletContext().getEffectiveMajorVersion(), context.getMetaData().isMetaDataComplete(), context.isConfigurationDiscovered(), isUseMultiThreading(context), getMaxScanWait(context)); parseContainerPath(context, parser); // email from Rajiv Mordani jsrs 315 7 April 2010 // If there is a <others/> then the ordering should be // WEB-INF/classes the order of the declared elements + others. // In case there is no others then it is // WEB-INF/classes + order of the elements. parseWebInfClasses(context, parser); parseWebInfLib(context, parser); start = System.nanoTime(); // execute scan, either effectively synchronously (1 thread only), or asynchronously (limited by // number of processors available) final Semaphore task_limit = (isUseMultiThreading(context) ? new Semaphore(Runtime.getRuntime().availableProcessors()) : new Semaphore(1)); final CountDownLatch latch = new CountDownLatch(_parserTasks.size()); final MultiException me = new MultiException(); for (final ParserTask p : _parserTasks) { task_limit.acquire(); context .getServer() .getThreadPool() .execute( new Runnable() { @Override public void run() { try { p.call(); } catch (Exception e) { me.add(e); } finally { task_limit.release(); latch.countDown(); } } }); } boolean timeout = !latch.await(getMaxScanWait(context), TimeUnit.SECONDS); if (LOG.isDebugEnabled()) { for (ParserTask p : _parserTasks) LOG.debug( "Scanned {} in {}ms", p.getResource(), TimeUnit.MILLISECONDS.convert(p.getStatistic().getElapsed(), TimeUnit.NANOSECONDS)); LOG.debug( "Scanned {} container path jars, {} WEB-INF/lib jars, {} WEB-INF/classes dirs in {}ms for context {}", _containerPathStats.getTotal(), _webInfLibStats.getTotal(), _webInfClassesStats.getTotal(), (TimeUnit.MILLISECONDS.convert(System.nanoTime() - start, TimeUnit.NANOSECONDS)), context); } if (timeout) me.add(new Exception("Timeout scanning annotations")); me.ifExceptionThrow(); }