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package com.sun.faces.config;
import com.sun.faces.RIConstants;
import static com.sun.faces.RIConstants.ANNOTATED_CLASSES;
import com.sun.faces.application.ApplicationAssociate;
import com.sun.faces.application.WebappLifecycleListener;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.EnableLazyBeanValidation;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.EnableThreading;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.EnableWebsocketEndpoint;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.ForceLoadFacesConfigFiles;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.VerifyFacesConfigObjects;
import com.sun.faces.config.WebConfiguration.WebContextInitParameter;
import static com.sun.faces.config.WebConfiguration.WebContextInitParameter.JavaxFacesProjectStage;
import com.sun.faces.el.ChainTypeCompositeELResolver;
import com.sun.faces.el.ELContextImpl;
import com.sun.faces.el.ELContextListenerImpl;
import com.sun.faces.el.ELUtils;
import com.sun.faces.el.FacesCompositeELResolver;
import com.sun.faces.mgbean.BeanBuilder;
import com.sun.faces.mgbean.BeanManager;
import com.sun.faces.push.WebsocketEndpoint;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.MojarraThreadFactory;
import com.sun.faces.util.ReflectionUtils;
import com.sun.faces.util.Timer;
import com.sun.faces.util.Util;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.faces.FactoryFinder;
import javax.faces.application.Application;
import javax.faces.application.ApplicationFactory;
import javax.faces.application.ProjectStage;
import javax.faces.context.FacesContext;
import javax.faces.event.PreDestroyApplicationEvent;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextAttributeEvent;
import javax.servlet.ServletContextAttributeListener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletRequestAttributeEvent;
import javax.servlet.ServletRequestAttributeListener;
import javax.servlet.ServletRequestEvent;
import javax.servlet.ServletRequestListener;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import javax.servlet.jsp.JspApplicationContext;
import javax.servlet.jsp.JspFactory;
import javax.websocket.server.ServerContainer;
import javax.websocket.server.ServerEndpointConfig;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* <p>Parse all relevant JavaServer Faces configuration resources, and
* configure the Reference Implementation runtime environment.</p>
* <p/>
*/
public class ConfigureListener implements ServletRequestListener,
HttpSessionListener,
ServletRequestAttributeListener,
HttpSessionAttributeListener,
ServletContextAttributeListener,
ServletContextListener {
private static final Logger LOGGER = FacesLogger.CONFIG.getLogger();
private ScheduledThreadPoolExecutor webResourcePool;
protected WebappLifecycleListener webAppListener;
protected WebConfiguration webConfig;
// ------------------------------------------ ServletContextListener Methods
@Override
public void contextInitialized(ServletContextEvent sce) {
ServletContext context = sce.getServletContext();
Timer timer = Timer.getInstance();
if (timer != null) {
timer.startTiming();
}
ConfigManager configManager = ConfigManager.getInstance(context);
if (null == configManager) {
configManager = ConfigManager.createInstance(context);
}
if (configManager.hasBeenInitialized(context)) {
return;
}
InitFacesContext initContext = new InitFacesContext(context);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
MessageFormat.format(
"ConfigureListener.contextInitialized({0})",
getServletContextIdentifier(context)));
}
webConfig = WebConfiguration.getInstance(context);
// Check to see if the FacesServlet is present in the
// web.xml. If it is, perform faces configuration as normal,
// otherwise, simply return.
Object mappingsAdded = context.getAttribute(RIConstants.FACES_INITIALIZER_MAPPINGS_ADDED);
if (mappingsAdded != null) {
context.removeAttribute(RIConstants.FACES_INITIALIZER_MAPPINGS_ADDED);
}
WebXmlProcessor webXmlProcessor = new WebXmlProcessor(context);
if (mappingsAdded == null) {
if (!webXmlProcessor.isFacesServletPresent()) {
if (!webConfig.isOptionEnabled(ForceLoadFacesConfigFiles)) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
"No FacesServlet found in deployment descriptor - bypassing configuration");
}
WebConfiguration.clear(context);
configManager.destroy(context);
ConfigManager.removeInstance(context);
InitFacesContext.cleanupInitMaps(context);
return;
}
} else {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
"FacesServlet found in deployment descriptor - processing configuration.");
}
}
}
if (webXmlProcessor.isDistributablePresent()) {
webConfig.setOptionEnabled(WebConfiguration.BooleanWebContextInitParameter.EnableDistributable, true);
context.setAttribute(WebConfiguration.BooleanWebContextInitParameter.EnableDistributable.getQualifiedName(), Boolean.TRUE);
}
// bootstrap of faces required
webAppListener = new WebappLifecycleListener(context);
webAppListener.contextInitialized(sce);
ReflectionUtils.initCache(Thread.currentThread().getContextClassLoader());
Throwable caughtThrowable = null;
try {
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"jsf.config.listener.version",
getServletContextIdentifier(context));
}
if (webConfig.isOptionEnabled(VerifyFacesConfigObjects)) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.warning("jsf.config.verifyobjects.development_only");
}
// if we're verifying, force bean validation to occur at startup as well
webConfig.overrideContextInitParameter(EnableLazyBeanValidation, false);
Verifier.setCurrentInstance(new Verifier());
}
configManager.initialize(context);
if (shouldInitConfigMonitoring()) {
initConfigMonitoring(context);
}
// Step 7, verify that all the configured factories are available
// and optionall that configured objects can be created.
Verifier v = Verifier.getCurrentInstance();
if (v != null && !v.isApplicationValid() && LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.severe("jsf.config.verifyobjects.failures_detected");
StringBuilder sb = new StringBuilder(128);
for (String m : v.getMessages()) {
sb.append(m).append('\n');
}
LOGGER.severe(sb.toString());
}
registerELResolverAndListenerWithJsp(context, false);
ApplicationAssociate associate =
ApplicationAssociate.getInstance(context);
ELContext elctx = new ELContextImpl(initContext.getApplication().getELResolver());
elctx.putContext(FacesContext.class, initContext);
ExpressionFactory exFactory = ELUtils.getDefaultExpressionFactory(associate, initContext);
if (null != exFactory) {
elctx.putContext(ExpressionFactory.class, exFactory);
}
initContext.setELContext(elctx);
if (associate != null) {
associate.setContextName(getServletContextIdentifier(context));
BeanManager manager = associate.getBeanManager();
List<String> eagerBeans = manager.getEagerBeanNames();
if (!eagerBeans.isEmpty()) {
for (String name : eagerBeans) {
manager.create(name, initContext);
}
}
boolean isErrorPagePresent = webXmlProcessor.isErrorPagePresent();
associate.setErrorPagePresent(isErrorPagePresent);
context.setAttribute(RIConstants.ERROR_PAGE_PRESENT_KEY_NAME,
isErrorPagePresent);
}
// Register websocket endpoint if explicitly enabled.
// Note: websocket channel filter is registered in FacesInitializer.
if (webConfig.isOptionEnabled(EnableWebsocketEndpoint)) {
ServerContainer serverContainer = (ServerContainer) context.getAttribute(ServerContainer.class.getName());
if (serverContainer == null) {
throw new UnsupportedOperationException("Cannot enable f:websocket."
+ " The current websocket container implementation does not support programmatically registering a container-provided endpoint.");
}
serverContainer.addEndpoint(ServerEndpointConfig.Builder.create(WebsocketEndpoint.class, WebsocketEndpoint.URI_TEMPLATE).build());
}
webConfig.doPostBringupActions();
configManager.publishPostConfigEvent();
} catch (Throwable t) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Critical error during deployment: ", t);
}
caughtThrowable = t;
} finally {
sce.getServletContext().removeAttribute(ANNOTATED_CLASSES);
Verifier.setCurrentInstance(null);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
"jsf.config.listener.version.complete");
}
if (timer != null) {
timer.stopTiming();
timer.logResult("Initialization of context " +
getServletContextIdentifier(context));
}
if (null != caughtThrowable) {
throw new RuntimeException(caughtThrowable);
}
// Bug 20458755: The InitFacesContext was not being cleaned up, resulting in
// a partially constructed FacesContext being made available
// to other code that re-uses this Thread at init time.
initContext.removeInitContextEntryForCurrentThread();
}
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
ServletContext context = sce.getServletContext();
ConfigManager configManager = ConfigManager.getInstance(context);
// The additional check for a WebConfiguration instance was added at the request of JBoss
if ((null == configManager) && (WebConfiguration.getInstanceWithoutCreating(context) != null)) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Unexpected state during contextDestroyed: no ConfigManager instance in current ServletContext but one is expected to exist.");
}
}
if (null == configManager || !configManager.hasBeenInitialized(context)) {
return;
}
InitFacesContext initContext = null;
try {
initContext = getInitFacesContext(context);
if (null == initContext) {
initContext = new InitFacesContext(context);
} else {
InitFacesContext.getThreadInitContextMap().put(Thread.currentThread(), initContext);
}
if (webAppListener != null) {
webAppListener.contextDestroyed(sce);
webAppListener = null;
}
if (webResourcePool != null) {
webResourcePool.shutdownNow();
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
"ConfigureListener.contextDestroyed({0})",
context.getServletContextName());
}
ELContext elctx = new ELContextImpl(initContext.getApplication().getELResolver());
elctx.putContext(FacesContext.class, initContext);
ExpressionFactory exFactory = ELUtils.getDefaultExpressionFactory(initContext);
if (null != exFactory) {
elctx.putContext(ExpressionFactory.class, exFactory);
}
initContext.setELContext(elctx);
Application app = initContext.getApplication();
app.publishEvent(initContext,
PreDestroyApplicationEvent.class,
Application.class,
app);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
"Unexpected exception when attempting to tear down the Mojarra runtime",
e);
}
} finally {
ApplicationAssociate.clearInstance(context);
ApplicationAssociate.setCurrentInstance(null);
// Release the initialization mark on this web application
configManager.destroy(context);
ConfigManager.removeInstance(context);
FactoryFinder.releaseFactories();
ReflectionUtils.clearCache(Thread.currentThread().getContextClassLoader());
WebConfiguration.clear(context);
InitFacesContext.cleanupInitMaps(context);
}
}
// ------------------------------------- Methods from ServletRequestListener
@Override
public void requestDestroyed(ServletRequestEvent event) {
if (webAppListener != null) {
webAppListener.requestDestroyed(event);
}
}
@Override
public void requestInitialized(ServletRequestEvent event) {
if (webAppListener != null) {
webAppListener.requestInitialized(event);
}
}
// ----------------------------------------- Methods from HttpSessionListener
@Override
public void sessionCreated(HttpSessionEvent event) {
if (webAppListener != null) {
webAppListener.sessionCreated(event);
}
}
@Override
public void sessionDestroyed(HttpSessionEvent event) {
if (webAppListener != null) {
webAppListener.sessionDestroyed(event);
}
}
// ---------------------------- Methods from ServletRequestAttributeListener
@Override
public void attributeAdded(ServletRequestAttributeEvent event) {
// ignored
}
@Override
public void attributeRemoved(ServletRequestAttributeEvent event) {
if (webAppListener != null) {
webAppListener.attributeRemoved(event);
}
}
@Override
public void attributeReplaced(ServletRequestAttributeEvent event) {
if (webAppListener != null) {
webAppListener.attributeReplaced(event);
}
}
// ------------------------------- Methods from HttpSessionAttributeListener
@Override
public void attributeAdded(HttpSessionBindingEvent event) {
// ignored
}
@Override
public void attributeRemoved(HttpSessionBindingEvent event) {
if (webAppListener != null) {
webAppListener.attributeRemoved(event);
}
}
@Override
public void attributeReplaced(HttpSessionBindingEvent event) {
if (webAppListener != null) {
webAppListener.attributeReplaced(event);
}
}
// ---------------------------- Methods from ServletContextAttributeListener
@Override
public void attributeAdded(ServletContextAttributeEvent event) {
// ignored
}
@Override
public void attributeRemoved(ServletContextAttributeEvent event) {
if (webAppListener != null) {
webAppListener.attributeRemoved(event);
}
}
@Override
public void attributeReplaced(ServletContextAttributeEvent event) {
if (webAppListener != null) {
webAppListener.attributeReplaced(event);
}
}
// --------------------------------------------------------- Private Methods
private boolean shouldInitConfigMonitoring() {
boolean development = isDevModeEnabled();
boolean threadingOptionSpecified = webConfig.isSet(EnableThreading);
if (development && !threadingOptionSpecified) {
return true;
}
boolean threadingOption = webConfig.isOptionEnabled(EnableThreading);
return (development && threadingOptionSpecified && threadingOption);
}
private void initConfigMonitoring(ServletContext context) {
//noinspection unchecked
Collection<URI> webURIs =
(Collection<URI>) context.getAttribute("com.sun.faces.webresources");
if (isDevModeEnabled() && webURIs != null && !webURIs.isEmpty()) {
webResourcePool = new ScheduledThreadPoolExecutor(1, new MojarraThreadFactory("WebResourceMonitor"));
webResourcePool.scheduleAtFixedRate(new WebConfigResourceMonitor(context, webURIs),
2000,
2000,
TimeUnit.MILLISECONDS);
}
context.removeAttribute("com.sun.faces.webresources");
}
private boolean isDevModeEnabled() {
// interrogate the init parameter directly vs looking up the application
return "Development".equals(webConfig.getOptionValue(JavaxFacesProjectStage));
}
/**
* This method will be invoked {@link WebConfigResourceMonitor} when
* changes to any of the faces-config.xml files included in WEB-INF
* are modified.
*/
private void reload(ServletContext sc) {
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"Reloading JSF configuration for context {0}",
getServletContextIdentifier(sc));
}
// tear down the application
try {
// this will only be true in the automated test usage scenario
if (null != webAppListener) {
List<HttpSession> sessions = webAppListener.getActiveSessions();
if (sessions != null) {
for (HttpSession session : sessions) {
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"Invalidating Session {0}",
session.getId());
}
session.invalidate();
}
}
}
ApplicationAssociate associate = ApplicationAssociate.getInstance(sc);
if (associate != null) {
BeanManager manager = associate.getBeanManager();
for (Map.Entry<String, BeanBuilder> entry : manager.getRegisteredBeans().entrySet()) {
String name = entry.getKey();
BeanBuilder bean = entry.getValue();
if (ELUtils.Scope.APPLICATION.toString().equals(bean.getScope())) {
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"Removing application scoped managed bean: {0}",
name);
}
sc.removeAttribute(name);
}
}
}
// Release any allocated application resources
FactoryFinder.releaseFactories();
} catch (Exception e) {
e.printStackTrace();
} finally {
FacesContext initContext = new InitFacesContext(sc);
ApplicationAssociate
.clearInstance(initContext.getExternalContext());
ApplicationAssociate.setCurrentInstance(null);
// Release the initialization mark on this web application
ConfigManager configManager = ConfigManager.getInstance(sc);
if (null != configManager) {
configManager.destroy(sc);
ConfigManager.removeInstance(sc);
} else {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Unexpected state during reload: no ConfigManager instance in current ServletContext but one is expected to exist.");
}
}
initContext.release();
ReflectionUtils.clearCache(Thread.currentThread().getContextClassLoader());
WebConfiguration.clear(sc);
}
// bring the application back up, avoid re-registration of certain JSP
// artifacts. No verification will be performed either to make this
// light weight.
// init a new WebAppLifecycleListener so that the cached ApplicationAssociate
// is removed.
webAppListener = new WebappLifecycleListener(sc);
FacesContext initContext = new InitFacesContext(sc);
ReflectionUtils
.initCache(Thread.currentThread().getContextClassLoader());
try {
ConfigManager configManager = ConfigManager.createInstance(sc);
if (null != configManager) {
configManager.initialize(sc);
} else {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Unexpected state during reload: no ConfigManager instance in current ServletContext but one is expected to exist.");
}
}
registerELResolverAndListenerWithJsp(sc, true);
ApplicationAssociate associate =
ApplicationAssociate.getInstance(sc);
if (associate != null) {
Boolean errorPagePresent = (Boolean) sc.getAttribute(RIConstants.ERROR_PAGE_PRESENT_KEY_NAME);
if (null != errorPagePresent) {
associate.setErrorPagePresent(errorPagePresent);
associate.setContextName(getServletContextIdentifier(sc));
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
initContext.release();
}
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"Reload complete.",
getServletContextIdentifier(sc));
}
}
private static String getServletContextIdentifier(ServletContext context) {
if (context.getMajorVersion() == 2 && context.getMinorVersion() < 5) {
return context.getServletContextName();
} else {
try {
return context.getContextPath();
} catch(AbstractMethodError error){
return context.getServletContextName();
}
}
}
private static boolean isJspTwoOne(ServletContext context) {
// The following try/catch is a hack to work around
// a bug in Tomcat 6 where JspFactory.getDefaultFactory() will
// return null unless JspRuntimeContext has been loaded.
try {
Class.forName("org.apache.jasper.compiler.JspRuntimeContext");
} catch (ClassNotFoundException ignored) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "Dected JSP 2.1", ignored);
}
}
if (JspFactory.getDefaultFactory() == null) {
return false;
}
try {
JspFactory.class.getMethod("getJspApplicationContext",
ServletContext.class);
} catch (NoSuchMethodException | SecurityException e) {
return false;
}
try {
JspFactory.getDefaultFactory().getJspApplicationContext(context);
} catch (Throwable e) {
return false;
}
return true;
}
public void registerELResolverAndListenerWithJsp(ServletContext context, boolean reloaded) {
if (webConfig.isSet(WebContextInitParameter.ExpressionFactory)
|| !isJspTwoOne(context)) {
// first try to load a factory defined in web.xml
if (!installExpressionFactory(context,
webConfig.getOptionValue(
WebContextInitParameter.ExpressionFactory))) {
throw new ConfigurationException(
MessageUtils.getExceptionMessageString(
MessageUtils.INCORRECT_JSP_VERSION_ID,
WebContextInitParameter.ExpressionFactory.getDefaultValue(),
WebContextInitParameter.ExpressionFactory.getQualifiedName()));
}
} else {
// JSP 2.1 specific check
if (JspFactory.getDefaultFactory().getJspApplicationContext(context) == null) {
return;
}
// register an empty resolver for now. It will be populated after the
// first request is serviced.
FacesCompositeELResolver compositeELResolverForJsp =
new ChainTypeCompositeELResolver(FacesCompositeELResolver.ELResolverChainType.JSP);
ApplicationAssociate associate =
ApplicationAssociate.getInstance(context);
if (associate != null) {
associate.setFacesELResolverForJsp(compositeELResolverForJsp);
}
// get JspApplicationContext.
JspApplicationContext jspAppContext = JspFactory.getDefaultFactory()
.getJspApplicationContext(context);
// cache the ExpressionFactory instance in ApplicationAssociate
if (associate != null) {
associate.setExpressionFactory(jspAppContext.getExpressionFactory());
}
// register compositeELResolver with JSP
try {
jspAppContext.addELResolver(compositeELResolverForJsp);
}
catch (IllegalStateException e) {
ApplicationFactory factory = (ApplicationFactory)
FactoryFinder.getFactory(FactoryFinder.APPLICATION_FACTORY);
Application app = factory.getApplication();
if (app.getProjectStage() != ProjectStage.UnitTest && !reloaded) {
throw e;
}
}
// register JSF ELContextListenerImpl with Jsp
ELContextListenerImpl elContextListener = new ELContextListenerImpl();
jspAppContext.addELContextListener(elContextListener);
}
}
private boolean installExpressionFactory(ServletContext sc,
String elFactoryType) {
if (elFactoryType == null) {
return false;
}
try {
ExpressionFactory factory = (ExpressionFactory)
Util.loadClass(elFactoryType, this).newInstance();
ApplicationAssociate associate =
ApplicationAssociate.getInstance(sc);
if (associate != null) {
associate.setExpressionFactory(factory);
}
return true;
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.severe(MessageFormat.format("Unable to instantiate ExpressionFactory ''{0}''",
elFactoryType));
}
return false;
}
}
private InitFacesContext getInitFacesContext(ServletContext context) {
Map initContextServletContext = InitFacesContext.getInitContextServletContextMap();
Set entries = initContextServletContext.entrySet();
InitFacesContext initContext = null;
for (Iterator iterator1 = entries.iterator(); iterator1.hasNext();) {
Map.Entry entry1 = (Map.Entry)iterator1.next();
Object initContextKey = entry1.getKey();
Object value1 = entry1.getValue();
if (context == value1) {
initContext = (InitFacesContext)initContextKey;
break;
}
}
return initContext;
}
// ----------------------------------------------------------- Inner classes
/**
* <p>Processes a web application's deployment descriptor looking
* for a reference to <code>javax.faces.webapp.FacesServlet</code>.</p>
*/
private static class WebXmlProcessor {
private static final String WEB_XML_PATH = "/WEB-INF/web.xml";
private static final String WEB_FRAGMENT_PATH = "META-INF/web-fragment.xml";
private boolean facesServletPresent;
private boolean errorPagePresent;
private boolean distributablePresent;
/**
* <p>When instantiated, the web.xml of the current application
* will be scanned looking for a references to the
* <code>FacesServlet</code>. <code>isFacesServletPresent()</code>
* will return the appropriate value based on the scan.</p>
*
* @param context the <code>ServletContext</code> for the application
* of interest
*/
WebXmlProcessor(ServletContext context) {
if (context != null) {
scanForFacesServlet(context);
}
} // END WebXmlProcessor
/**
* @return <code>true</code> if the <code>WebXmlProcessor</code>
* detected a <code>FacesServlet</code> entry, otherwise return
* <code>false</code>.</p>
*/
boolean isFacesServletPresent() {
return facesServletPresent;
} // END isFacesServletPresent
/**
* @return <code>true</code> if <code>WEB-INF/web.xml</code> contains
* a <code><error-page></code> element.
*/
boolean isErrorPagePresent() {
return errorPagePresent;
}
/*
* return true if <distributable /> is present in the web.xml or a fragment.
*
*/
public boolean isDistributablePresent() {
return distributablePresent;
}
/**
* <p>Parse the web.xml for the current application and scan
* for a FacesServlet entry, if found, set the
* <code>facesServletPresent</code> property to true.
*
* @param context the ServletContext instance for this application
*/
private void scanForFacesServlet(ServletContext context) {
InputStream in = context.getResourceAsStream(WEB_XML_PATH);
if (in == null) {
if (context.getMajorVersion() < 3) {
throw new ConfigurationException("no web.xml present");
}
}
SAXParserFactory factory = getConfiguredFactory();
if (in != null) {
try {
SAXParser parser = factory.newSAXParser();
parser.parse(in, new WebXmlHandler());
} catch (ParserConfigurationException | SAXException | IOException e) {
warnProcessingError(e, context);
facesServletPresent = true;
return;
} finally {
if (in != null) {
try {
in.close();
} catch (Exception ioe) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "Closing stream", ioe);
}
}
}
}
}
if (!facesServletPresent && context.getMajorVersion() >= 3) {
ClassLoader cl = Util.getCurrentLoader(this);
Enumeration<URL> urls;
try {
urls = cl.getResources(WEB_FRAGMENT_PATH);
} catch (IOException ioe) {
throw new ConfigurationException(ioe);
}
if (urls != null) {
while (urls.hasMoreElements() && !facesServletPresent) {
InputStream fragmentStream = null;
try {
URL url = urls.nextElement();
URLConnection conn = url.openConnection();
conn.setUseCaches(false);
fragmentStream = conn.getInputStream();
SAXParser parser = factory.newSAXParser();
parser.parse(fragmentStream, new WebXmlHandler());
} catch (IOException | ParserConfigurationException | SAXException e) {
warnProcessingError(e, context);
facesServletPresent = true;
return;
} finally {
if (fragmentStream != null) {
try {
fragmentStream.close();
} catch (IOException ioe) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
"Exception whil scanning for FacesServlet", ioe);
}
}
}
}
}
}
}
} // END scanForFacesServlet
/**
* <p>Return a <code>SAXParserFactory</code> instance that is
* non-validating and is namespace aware.</p>
*
* @return configured <code>SAXParserFactory</code>
*/
private SAXParserFactory getConfiguredFactory() {
SAXParserFactory factory = Util.createSAXParserFactory();
factory.setValidating(false);
factory.setNamespaceAware(true);
return factory;
} // END getConfiguredFactory
private void warnProcessingError(Exception e, ServletContext sc) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
MessageFormat.format(
"jsf.configuration.web.xml.parse.failed",
getServletContextIdentifier(sc)),
e);
}
}
/**
* <p>A simple SAX handler to process the elements of interested
* within a web application's deployment descriptor.</p>
*/
private class WebXmlHandler extends DefaultHandler {
private static final String ERROR_PAGE = "error-page";
private static final String SERVLET_CLASS = "servlet-class";
private static final String FACES_SERVLET =
"javax.faces.webapp.FacesServlet";
private boolean servletClassFound;
@SuppressWarnings({"StringBufferField"})
private StringBuffer content;
@Override
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException {
return new InputSource(new StringReader(""));
} // END resolveEntity
@Override
public void startElement(String uri, String localName,
String qName, Attributes attributes)
throws SAXException {
if (!errorPagePresent && ERROR_PAGE.equals(localName)) {
errorPagePresent = true;
return;
}
if (!facesServletPresent) {
if (SERVLET_CLASS.equals(localName)) {
servletClassFound = true;
//noinspection StringBufferWithoutInitialCapacity
content = new StringBuffer();
} else {
servletClassFound = false;
}
}
if ("distributable".equals(localName)) {
distributablePresent = true;
}
} // END startElement
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (servletClassFound && !facesServletPresent) {
content.append(ch, start, length);
}
} // END characters
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if (servletClassFound && !facesServletPresent &&
FACES_SERVLET.equals(content.toString().trim())) {
facesServletPresent = true;
}
} // END endElement
} // END WebXmlHandler
} // END WebXmlProcessor
private class WebConfigResourceMonitor implements Runnable {
private List<Monitor> monitors;
private ServletContext sc;
// -------------------------------------------------------- Constructors
public WebConfigResourceMonitor(ServletContext sc, Collection<URI> uris) {
assert (uris != null);
this.sc = sc;
for (URI uri : uris) {
if (monitors == null) {
monitors = new ArrayList<>(uris.size());
}
try {
Monitor m = new Monitor(uri);
monitors.add(m);
} catch (IOException ioe) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.severe("Unable to setup resource monitor for "
+ uri.toString()
+ ". Resource will not be monitored for changes.");
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
ioe.toString(),
ioe);
}
}
}
}
// ----------------------------------------------- Methods from Runnable
/**
* PENDING javadocs
*/
@Override
public void run() {
assert (monitors != null);
boolean reloaded = false;
for (Iterator<Monitor> i = monitors.iterator(); i.hasNext(); ) {
Monitor m = i.next();
try {
if (m.hasBeenModified()) {
if (!reloaded) {
reloaded = true;
}
}
} catch (IOException ioe) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.severe("Unable to access url "
+ m.uri.toString()
+ ". Monitoring for this resource will no longer occur.");
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
ioe.toString(),
ioe);
}
i.remove();
}
}
if (reloaded) {
reload(sc);
}
}
// ------------------------------------------------------- Inner Classes
private class Monitor {
private URI uri;
private long timestamp = -1;
// ---------------------------------------------------- Constructors
Monitor(URI uri) throws IOException {
this.uri = uri;
this.timestamp = getLastModified();
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"Monitoring {0} for modifications",
uri.toURL().toExternalForm());
}
}
// ----------------------------------------- Package Private Methods
boolean hasBeenModified() throws IOException {
long temp = getLastModified();
if (timestamp < temp) {
timestamp = temp;
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
"{0} changed!",
uri.toURL().toExternalForm());
}
return true;
}
return false;
}
// ------------------------------------------------- Private Methods
private long getLastModified() throws IOException {
InputStream in = null;
try {
URLConnection conn = uri.toURL().openConnection();
conn.connect();
in = conn.getInputStream();
return conn.getLastModified();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException ignored) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST,
"Exception while closing stream", ignored);
}
}
}
}
}
} // END Monitor
} // END WebConfigResourceMonitor
}