[undertow-dev] Embedding undertow into Red5
Mondain
mondain at gmail.com
Thu Feb 6 12:45:51 EST 2014
I've got a first rev of my web.xml parser now and I've run into a curious
thing regarding filters. How do I add the url-pattern to a FilterInfo
mapping as I do with a ServletInfo mapping?
On Thu, Feb 6, 2014 at 7:35 AM, Mondain <mondain at gmail.com> wrote:
> Thanks for the reply, now I know I have more work to do.
>
>
> On Thu, Feb 6, 2014 at 12:33 AM, Stuart Douglas <sdouglas at redhat.com>wrote:
>
>>
>>
>> ------------------------------
>>
>> *From: *"Mondain" <mondain at gmail.com>
>> *To: *undertow-dev at lists.jboss.org
>> *Sent: *Thursday, 6 February, 2014 9:36:34 AM
>> *Subject: *[undertow-dev] Embedding undertow into Red5
>>
>>
>> I'm a core dev on the Red5 project and I would like to offer undertow as
>> an alternative to our current embedded tomcat server. I have read through
>> the examples, unit tests, and documentation regarding undertow. I have
>> coded and run my "plugin" implementation, but all I am getting are "Not
>> Found" responses in the browser. My suspicion is that the web.xml is not
>> being read in and / or parsed, but I'm not sure since I'm new with this
>> code base. Below you will see how I'm setting up and starting things; let
>> me know what I'm doing incorrectly.
>>
>> Hi Mondain,
>>
>> You are correct in your suspicion that Undertow is not parsing the
>> web.xml. Undertow provides an embedded Servlet implementation but it does
>> not implement the discovery/parsing parts, as this is left up to the
>> embedding application.
>>
>> Basically instead of using web.xml you need to add servlets, filters etc
>> to the DeploymentInfo structure programatically. The main reason for this
>> is basically because Undertow is designed to integrate well into other
>> applications (especially Wildfly), and application servers generally
>> provide their own implementation of parsers, annotation processors etc.
>>
>> With that said though at some point we will probably do a standalone
>> parser/annotation processor to make this work out of the box (probably by
>> just copying the relevant bits from wildfly and packaging them in their own
>> jar). This is a fairly low priority item at the moment though.
>>
>> Stuart
>>
>>
>>
>>
>>
>> //get a reference to the current threads classloader
>> final ClassLoader originalClassLoader =
>> Thread.currentThread().getContextClassLoader();
>> // root location for servlet container
>> String serverRoot = System.getProperty("red5.root");
>> String confRoot = System.getProperty("red5.config_root");
>> System.setProperty("UNDERTOW_HOME", serverRoot);
>> if (webappFolder == null) {
>> // Use default webapps directory
>> webappFolder = FileUtil.formatPath(System.getProperty("red5.root"),
>> "/webapps");
>> }
>> System.setProperty("red5.webapp.root", webappFolder);
>> // scan the sub directories to determine our context paths
>> buildContextPathList(webappFolder);
>> try {
>> // create our servlet container
>> container = ServletContainer.Factory.newInstance();
>> // create a root path handler
>> final PathHandler rootHandler = new PathHandler();
>> // create one server and use it everywhere
>> Undertow.Builder builder = Undertow.builder();
>> // loop through connectors adding listeners to the builder
>> for (UndertowConnector undertowConnector : connectors) {
>> InetSocketAddress addr = undertowConnector.getSocketAddress();
>> builder.addListener(addr.getPort(), addr.getHostName(),
>> (undertowConnector.isSecure() ? ListenerType.HTTPS : ListenerType.HTTP));
>> }
>> // loop the other contexts
>> for (String contextPath : contextPaths) {
>> // create a class loader for the context
>> ClassLoader classLoader = buildWebClassLoader(originalClassLoader,
>> webappFolder, contextPath);
>> // create deployment info
>> DeploymentInfo info = deployment()
>> .setClassLoader(classLoader)
>> .setContextPath(contextPath.equalsIgnoreCase("/ROOT") ?
>> "/" : contextPath)
>> .setDefaultEncoding("UTF-8")
>> .setDeploymentName(contextPath.substring(1) + ".war")
>> .setUrlEncoding("UTF-8");
>> // add the new deployment to the servlet container
>> DeploymentManager manager = container.addDeployment(info);
>> // deploy
>> manager.deploy();
>> // add path
>> rootHandler.addPrefixPath(info.getContextPath(),
>> manager.start());
>> // get deployment
>> Deployment deployment = manager.getDeployment();
>> // get servlet context
>> final ServletContext servletContext = deployment.getServletContext();
>> log.debug("Context initialized: {}", servletContext.getContextPath());
>> try {
>> log.debug("Context: {}", servletContext);
>> final ClassLoader webClassLoader = info.getClassLoader();
>> log.debug("Webapp classloader: {}", webClassLoader);
>> // get the (spring) config file path
>> final String contextConfigLocation =
>> servletContext.getInitParameter(org.springframework.web.context.ContextLoader.CONFIG_LOCATION_PARAM)
>> == null ? defaultSpringConfigLocation
>> :
>> servletContext.getInitParameter(org.springframework.web.context.ContextLoader.CONFIG_LOCATION_PARAM);
>> log.debug("Spring context config location: {}", contextConfigLocation);
>> // get the (spring) parent context key
>> final String parentContextKey =
>> servletContext.getInitParameter(org.springframework.web.context.ContextLoader.LOCATOR_FACTORY_KEY_PARAM)
>> == null ? defaultParentContextKey
>> :
>> servletContext.getInitParameter(org.springframework.web.context.ContextLoader.LOCATOR_FACTORY_KEY_PARAM);
>> // set current threads classloader to the webapp classloader
>> Thread.currentThread().setContextClassLoader(webClassLoader);
>> // create a thread to speed-up application loading
>> Thread thread = new Thread("Launcher:" +
>> servletContext.getContextPath()) {
>> public void run() {
>> //set thread context classloader to web classloader
>> Thread.currentThread().setContextClassLoader(webClassLoader);
>> //get the web app's parent context
>> ApplicationContext parentContext = null;
>> if (applicationContext.containsBean(parentContextKey)) {
>> parentContext = (ApplicationContext)
>> applicationContext.getBean(parentContextKey);
>> } else {
>> log.warn("Parent context was not found: {}", parentContextKey);
>> }
>> // create a spring web application context
>> final String contextClass =
>> servletContext.getInitParameter(org.springframework.web.context.ContextLoader.CONTEXT_CLASS_PARAM)
>> == null ? XmlWebApplicationContext.class
>> .getName() :
>> servletContext.getInitParameter(org.springframework.web.context.ContextLoader.CONTEXT_CLASS_PARAM);
>> // web app context (spring)
>> ConfigurableWebApplicationContext appctx = null;
>> try {
>> Class<?> clazz = Class.forName(contextClass, true, webClassLoader);
>> appctx = (ConfigurableWebApplicationContext) clazz.newInstance();
>> // set the root webapp ctx attr on the each servlet context so spring can
>> find it later
>> servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE,
>> appctx);
>> appctx.setConfigLocations(new String[] { contextConfigLocation });
>> appctx.setServletContext(servletContext);
>> // set parent context or use current app context
>> if (parentContext != null) {
>> appctx.setParent(parentContext);
>> } else {
>> appctx.setParent(applicationContext);
>> }
>> // refresh the factory
>> appctx.refresh();
>> appctx.start();
>> } catch (Throwable e) {
>> throw new RuntimeException("Failed to load webapplication context class",
>> e);
>> }
>> }
>> };
>> thread.setDaemon(true);
>> thread.start();
>> } catch (Throwable t) {
>> t.printStackTrace();
>> } finally {
>> //reset the classloader
>> Thread.currentThread().setContextClassLoader(originalClassLoader);
>> }
>> }
>> // Dump deployments list
>> if (log.isDebugEnabled()) {
>> for (String deployment : container.listDeployments()) {
>> log.debug("Container deployment: {}", deployment);
>> }
>> }
>> // add a root handler
>> builder.setHandler(rootHandler);
>> // build the server instance
>> server = builder.build();
>> log.info("Starting Undertow");
>> server.start();
>> } catch (Exception e) {
>> if (e instanceof BindException || e.getMessage().indexOf("BindException")
>> != -1) {
>> log.error("Error loading undertow, unable to bind connector. You may
>> not have permission to use the selected port", e);
>> } else {
>> log.error("Error loading undertow", e);
>> }
>> }
>>
>>
>>
>> Regards,
>> Paul
>>
>> --
>> http://gregoire.org/
>> http://code.google.com/p/red5/
>>
>> _______________________________________________
>> undertow-dev mailing list
>> undertow-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/undertow-dev
>>
>>
>>
>
>
> --
> http://gregoire.org/
> http://code.google.com/p/red5/
>
--
http://gregoire.org/
http://code.google.com/p/red5/
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