Examples with ResourceCache org.eclipse.jetty.server.ResourceCache used on opensource projects

Example 1 with ResourceCache

use of org.eclipse.jetty.server.ResourceCache in project jetty.project by eclipse.

the class OverlayedAppProvider method createContextHandler.

/**
     * Create Context Handler.
     * <p>
     * Callback from the deployment manager to create a context handler instance.
     * @see org.eclipse.jetty.deploy.AppProvider#createContextHandler(org.eclipse.jetty.deploy.App)
     */
public synchronized ContextHandler createContextHandler(App app) throws Exception {
    final OverlayedApp overlayed = (OverlayedApp) app;
    final String origin = overlayed.getOriginId();
    final Instance instance = overlayed.getInstance();
    final Template template = instance.getTemplate();
    final Webapp webapp = template.getWebapp();
    final Node node = _node;
    // remember the original loader
    ClassLoader orig_loader = Thread.currentThread().getContextClassLoader();
    try {
        // Look for existing shared resources
        String key = (node == null ? "" : node.getLoadedKey()) + template.getLoadedKey() + (webapp == null ? "" : webapp.getLoadedKey());
        instance.setSharedKey(key);
        TemplateContext shared = _shared.get(key);
        // Create shared resourced
        if (shared == null)
            shared = createTemplateContext(key, webapp, template, node, orig_loader);
        // Build the instance lib loader
        ClassLoader shared_loader = shared.getWebappLoader() != null ? shared.getWebappLoader() : (shared.getLibLoader() != null ? shared.getLibLoader() : orig_loader);
        ClassLoader loader = shared_loader;
        Resource instance_lib = instance.getResource(LIB);
        if (instance_lib.exists()) {
            List<URL> libs = new ArrayList<URL>();
            for (String jar : instance_lib.list()) {
                if (!jar.toLowerCase(Locale.ENGLISH).endsWith(".jar"))
                    continue;
                libs.add(instance_lib.addPath(jar).getURL());
            }
            __log.debug("{}: libs={}", origin, libs);
            loader = URLClassLoader.newInstance(libs.toArray(new URL[] {}), loader);
        }
        // set the thread loader
        Thread.currentThread().setContextClassLoader(loader);
        // Create properties to be shared by overlay.xmls
        Map<String, Object> idMap = new HashMap<String, Object>();
        idMap.putAll(shared.getIdMap());
        idMap.put(_serverID, getDeploymentManager().getServer());
        // Create the instance context for the template
        ContextHandler context = null;
        Resource template_context_xml = template.getResource(OVERLAY_XML);
        if (template_context_xml.exists()) {
            __log.debug("{}: overlay.xml={}", origin, template_context_xml);
            XmlConfiguration xmlc = newXmlConfiguration(template_context_xml.getURL(), idMap, template, instance);
            context = (ContextHandler) xmlc.configure();
            idMap = xmlc.getIdMap();
        } else if (webapp == null)
            // If there is no webapp, this is a plain context
            context = new ContextHandler();
        else
            // It is a webapp context
            context = new WebAppContext();
        // Set the resource base
        final Resource instance_webapp = instance.getResource(WEBAPP);
        if (instance_webapp.exists()) {
            context.setBaseResource(new ResourceCollection(instance_webapp, shared.getBaseResource()));
            // Create the resource cache
            ResourceCache cache = new ResourceCache(shared.getResourceCache(), instance_webapp, context.getMimeTypes(), false, false);
            context.setAttribute(ResourceCache.class.getCanonicalName(), cache);
        } else {
            context.setBaseResource(shared.getBaseResource());
            context.setAttribute(ResourceCache.class.getCanonicalName(), shared.getResourceCache());
        }
        __log.debug("{}: baseResource={}", origin, context.getResourceBase());
        // Set the shared session scavenger timer
        context.setAttribute("org.eclipse.jetty.server.session.timer", _sessionScavenger);
        // Apply any node or instance overlay.xml
        for (Resource context_xml : getLayeredResources(OVERLAY_XML, node, instance)) {
            __log.debug("{}: overlay.xml={}", origin, context_xml);
            XmlConfiguration xmlc = newXmlConfiguration(context_xml.getURL(), idMap, template, instance);
            xmlc.getIdMap().put("Cache", context.getAttribute(ResourceCache.class.getCanonicalName()));
            xmlc.configure(context);
            idMap = xmlc.getIdMap();
        }
        // Is it a webapp?
        if (context instanceof WebAppContext) {
            final WebAppContext webappcontext = (WebAppContext) context;
            if (Arrays.asList(((WebAppContext) context).getServerClasses()).toString().equals(Arrays.asList(WebAppContext.__dftServerClasses).toString())) {
                __log.debug("clear server classes");
                webappcontext.setServerClasses(null);
            }
            // set classloader
            webappcontext.setCopyWebDir(false);
            webappcontext.setCopyWebInf(false);
            webappcontext.setExtractWAR(false);
            if (instance_webapp.exists()) {
                final Resource classes = instance_webapp.addPath("WEB-INF/classes");
                final Resource lib = instance_webapp.addPath("WEB-INF/lib");
                if (classes.exists() || lib.exists()) {
                    final AtomicBoolean locked = new AtomicBoolean(false);
                    WebAppClassLoader webapp_loader = new WebAppClassLoader(loader, webappcontext) {

                        @Override
                        public void addClassPath(Resource resource) throws IOException {
                            if (!locked.get())
                                super.addClassPath(resource);
                        }

                        @Override
                        public void addClassPath(String classPath) throws IOException {
                            if (!locked.get())
                                super.addClassPath(classPath);
                        }

                        @Override
                        public void addJars(Resource lib) {
                            if (!locked.get())
                                super.addJars(lib);
                        }
                    };
                    if (classes.exists())
                        webapp_loader.addClassPath(classes);
                    if (lib.exists())
                        webapp_loader.addJars(lib);
                    locked.set(true);
                    loader = webapp_loader;
                }
            }
            // Make sure loader is unique for JNDI
            if (loader == shared_loader)
                loader = new URLClassLoader(new URL[] {}, shared_loader);
            // add default descriptor
            List<Resource> webdefaults = getLayeredResources(WEB_DEFAULT_XML, instance, node, template);
            if (webdefaults.size() > 0) {
                Resource webdefault = webdefaults.get(0);
                __log.debug("{}: defaultweb={}", origin, webdefault);
                webappcontext.setDefaultsDescriptor(webdefault.toString());
            }
            // add overlay descriptors
            for (Resource override : getLayeredResources(WEB_FRAGMENT_XML, template, node, instance)) {
                __log.debug("{}: web override={}", origin, override);
                webappcontext.addOverrideDescriptor(override.toString());
            }
        }
        context.setClassLoader(loader);
        __log.debug("{}: baseResource={}", origin, context.getBaseResource());
        Resource jetty_web_xml = context.getResource("/WEB-INF/" + JettyWebXmlConfiguration.JETTY_WEB_XML);
        if (jetty_web_xml != null && jetty_web_xml.exists())
            context.setAttribute(JettyWebXmlConfiguration.XML_CONFIGURATION, newXmlConfiguration(jetty_web_xml.getURL(), idMap, template, instance));
        // Add listener to expand parameters from descriptors before other listeners execute
        Map<String, String> params = new HashMap<String, String>();
        populateParameters(params, template, instance);
        context.addEventListener(new ParameterExpander(params, context));
        System.err.println("created:\n" + context.dump());
        return context;
    } finally {
        Thread.currentThread().setContextClassLoader(orig_loader);
    }
}