/**
* Scan jars in WEB-INF/lib
*
* @param context
* @param parser
* @throws Exception
*/
public void parseWebInfLib(final WebAppContext context, final AnnotationParser parser)
throws Exception {
List<FragmentDescriptor> frags = context.getMetaData().getFragments();
// email from Rajiv Mordani jsrs 315 7 April 2010
// jars that do not have a web-fragment.xml are still considered fragments
// they have to participate in the ordering
ArrayList<URI> webInfUris = new ArrayList<URI>();
List<Resource> jars = context.getMetaData().getOrderedWebInfJars();
// No ordering just use the jars in any order
if (jars == null || jars.isEmpty()) jars = context.getMetaData().getWebInfJars();
_webInfLibStats = new CounterStatistic();
for (Resource r : jars) {
// for each jar, we decide which set of annotations we need to parse for
final Set<Handler> handlers = new HashSet<Handler>();
FragmentDescriptor f = getFragmentFromJar(r, frags);
// if its from a fragment jar that is metadata complete, we should skip scanning for
// @webservlet etc
// but yet we still need to do the scanning for the classes on behalf of the
// servletcontainerinitializers
// if a jar has no web-fragment.xml we scan it (because it is not excluded by the ordering)
// or if it has a fragment we scan it if it is not metadata complete
if (f == null
|| !isMetaDataComplete(f)
|| _classInheritanceHandler != null
|| !_containerInitializerAnnotationHandlers.isEmpty()) {
// register the classinheritance handler if there is one
if (_classInheritanceHandler != null) handlers.add(_classInheritanceHandler);
// register the handlers for the @HandlesTypes values that are themselves annotations if
// there are any
handlers.addAll(_containerInitializerAnnotationHandlers);
// only register the discoverable annotation handlers if this fragment is not metadata
// complete, or has no fragment descriptor
if (f == null || !isMetaDataComplete(f)) handlers.addAll(_discoverableAnnotationHandlers);
if (_parserTasks != null) {
ParserTask task = new ParserTask(parser, handlers, r, _webAppClassNameResolver);
_parserTasks.add(task);
_webInfLibStats.increment();
if (LOG.isDebugEnabled()) task.setStatistic(new TimeStatistic());
}
}
}
}
/**
* Scan classes in WEB-INF/classes
*
* @param context
* @param parser
* @throws Exception
*/
public void parseWebInfClasses(final WebAppContext context, final AnnotationParser parser)
throws Exception {
Set<Handler> handlers = new HashSet<Handler>();
handlers.addAll(_discoverableAnnotationHandlers);
if (_classInheritanceHandler != null) handlers.add(_classInheritanceHandler);
handlers.addAll(_containerInitializerAnnotationHandlers);
_webInfClassesStats = new CounterStatistic();
for (Resource dir : context.getMetaData().getWebInfClassesDirs()) {
if (_parserTasks != null) {
ParserTask task = new ParserTask(parser, handlers, dir, _webAppClassNameResolver);
_parserTasks.add(task);
_webInfClassesStats.increment();
if (LOG.isDebugEnabled()) task.setStatistic(new TimeStatistic());
}
}
}
/**
* Scan jars on container path.
*
* @param context
* @param parser
* @throws Exception
*/
public void parseContainerPath(final WebAppContext context, final AnnotationParser parser)
throws Exception {
// always parse for discoverable annotations as well as class hierarchy and
// servletcontainerinitializer related annotations
final Set<Handler> handlers = new HashSet<Handler>();
handlers.addAll(_discoverableAnnotationHandlers);
handlers.addAll(_containerInitializerAnnotationHandlers);
if (_classInheritanceHandler != null) handlers.add(_classInheritanceHandler);
_containerPathStats = new CounterStatistic();
for (Resource r : context.getMetaData().getContainerResources()) {
// queue it up for scanning if using multithreaded mode
if (_parserTasks != null) {
ParserTask task = new ParserTask(parser, handlers, r, _containerClassNameResolver);
_parserTasks.add(task);
_containerPathStats.increment();
if (LOG.isDebugEnabled()) task.setStatistic(new TimeStatistic());
}
}
}
/**
* 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();
}
/**
* @see org.eclipse.jetty.server.session.AbstractSessionCache#doPutIfAbsent(java.lang.String,
* org.eclipse.jetty.server.session.Session)
*/
@Override
public Session doPutIfAbsent(String id, Session session) {
Session s = _sessions.putIfAbsent(id, session);
if (s == null && !(session instanceof PlaceHolderSession)) _stats.increment();
return s;
}
/** @see org.eclipse.jetty.server.session.AbstractSessionCache#doDelete(java.lang.String) */
@Override
public Session doDelete(String id) {
Session s = _sessions.remove(id);
if (s != null && !(s instanceof PlaceHolderSession)) _stats.decrement();
return s;
}
public void resetStats() {
_stats.reset();
}
/** @return a running total of sessions in the cache */
public long getSessionsTotal() {
return _stats.getTotal();
}
/** @return the max number of sessions in the cache */
public long getSessionsMax() {
return _stats.getMax();
}
/** @return the number of sessions in the cache */
public long getSessionsCurrent() {
return _stats.getCurrent();
}
/**
* @see org.eclipse.jetty.server.session.AbstractSessionCache#doReplace(java.lang.String,
* org.eclipse.jetty.server.session.Session, org.eclipse.jetty.server.session.Session)
*/
@Override
public boolean doReplace(String id, Session oldValue, Session newValue) {
boolean result = _sessions.replace(id, oldValue, newValue);
if (result && (oldValue instanceof PlaceHolderSession)) _stats.increment();
return result;
}
