Example usage for javax.servlet ServletContext getContextPath

List of usage examples for javax.servlet ServletContext getContextPath

Introduction

In this page you can find the example usage for javax.servlet ServletContext getContextPath.

Prototype

public String getContextPath();

Source Link

Document

Returns the context path of the web application.

Usage

From source file:org.red5.server.tomcat.TomcatVHostLoader.java

/**
 * Starts a web application and its red5 (spring) component. This is basically a stripped down
 * version of init()./*from  w  w  w . j  a  va2 s  .  co m*/
 * 
 * @return true on success
 */
@SuppressWarnings("cast")
public boolean startWebApplication(String applicationName) {
    boolean result = false;
    log.info("Starting Tomcat virtual host - Web application");

    log.info("Virtual host root: {}", webappRoot);

    log.info("Virtual host context id: {}", defaultApplicationContextId);

    // application directory
    String contextName = '/' + applicationName;

    Container cont = null;

    //check if the context already exists for the host
    if ((cont = host.findChild(contextName)) == null) {
        log.debug("Context did not exist in host");
        String webappContextDir = FileUtil.formatPath(webappRoot, applicationName);
        //prepend slash
        Context ctx = addContext(contextName, webappContextDir);
        //set the newly created context as the current container
        cont = ctx;
    } else {
        log.debug("Context already exists in host");
    }

    try {
        ServletContext servletContext = ((Context) cont).getServletContext();
        log.debug("Context initialized: {}", servletContext.getContextPath());

        String prefix = servletContext.getRealPath("/");
        log.debug("Path: {}", prefix);

        Loader cldr = cont.getLoader();
        log.debug("Loader type: {}", cldr.getClass().getName());
        ClassLoader webClassLoader = cldr.getClassLoader();
        log.debug("Webapp classloader: {}", webClassLoader);
        //create a spring web application context
        XmlWebApplicationContext appctx = new XmlWebApplicationContext();
        appctx.setClassLoader(webClassLoader);
        appctx.setConfigLocations(new String[] { "/WEB-INF/red5-*.xml" });
        //check for red5 context bean
        if (applicationContext.containsBean(defaultApplicationContextId)) {
            appctx.setParent((ApplicationContext) applicationContext.getBean(defaultApplicationContextId));
        } else {
            log.warn("{} bean was not found in context: {}", defaultApplicationContextId,
                    applicationContext.getDisplayName());
            //lookup context loader and attempt to get what we need from it
            if (applicationContext.containsBean("context.loader")) {
                ContextLoader contextLoader = (ContextLoader) applicationContext.getBean("context.loader");
                appctx.setParent(contextLoader.getContext(defaultApplicationContextId));
            } else {
                log.debug("Context loader was not found, trying JMX");
                MBeanServer mbs = JMXFactory.getMBeanServer();
                //get the ContextLoader from jmx
                ObjectName oName = JMXFactory.createObjectName("type", "ContextLoader");
                ContextLoaderMBean proxy = null;
                if (mbs.isRegistered(oName)) {
                    proxy = (ContextLoaderMBean) MBeanServerInvocationHandler.newProxyInstance(mbs, oName,
                            ContextLoaderMBean.class, true);
                    log.debug("Context loader was found");
                    appctx.setParent(proxy.getContext(defaultApplicationContextId));
                } else {
                    log.warn("Context loader was not found");
                }
            }
        }
        if (log.isDebugEnabled()) {
            if (appctx.getParent() != null) {
                log.debug("Parent application context: {}", appctx.getParent().getDisplayName());
            }
        }
        //
        appctx.setServletContext(servletContext);
        //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.refresh();

        result = true;
    } catch (Throwable t) {
        log.error("Error setting up context: {}", applicationName, t);
        if (log.isDebugEnabled()) {
            t.printStackTrace();
        }
    }

    return result;
}

From source file:com.alibaba.dubbo.rpc.protocol.rest.RestProtocol.java

protected <T> Runnable doExport(T impl, Class<T> type, URL url) throws RpcException {
    String addr = url.getIp() + ":" + url.getPort();
    Class implClass = ServiceClassHolder.getInstance().popServiceClass();
    RestServer server = servers.get(addr);
    if (server == null) {
        server = serverFactory.createServer(url.getParameter(Constants.SERVER_KEY, "jetty"));
        server.start(url);/*w w w  . j av a  2 s.  c  om*/
        servers.put(addr, server);
    }

    String contextPath = getContextPath(url);
    if ("servlet".equalsIgnoreCase(url.getParameter(Constants.SERVER_KEY, "jetty"))) {
        ServletContext servletContext = ServletManager.getInstance()
                .getServletContext(ServletManager.EXTERNAL_SERVER_PORT);
        if (servletContext == null) {
            throw new RpcException("No servlet context found. Since you are using server='servlet', "
                    + "make sure that you've configured " + BootstrapListener.class.getName() + " in web.xml");
        }
        String webappPath = servletContext.getContextPath();
        if (StringUtils.isNotEmpty(webappPath)) {
            webappPath = webappPath.substring(1);
            if (!contextPath.startsWith(webappPath)) {
                throw new RpcException("Since you are using server='servlet', "
                        + "make sure that the 'contextpath' property starts with the path of external webapp");
            }
            contextPath = contextPath.substring(webappPath.length());
            if (contextPath.startsWith("/")) {
                contextPath = contextPath.substring(1);
            }
        }
    }

    final Class resourceDef = GetRestful.getRootResourceClass(implClass) != null ? implClass : type;

    server.deploy(resourceDef, impl, contextPath);

    final RestServer s = server;
    return new Runnable() {
        public void run() {
            // TODO due to dubbo's current architecture,
            // it will be called from registry protocol in the shutdown process and won't appear in logs
            s.undeploy(resourceDef);
        }
    };
}

From source file:com.ctg.itrdc.janus.rpc.protocol.rest.RestProtocol.java

protected <T> Runnable doExport(T impl, Class<T> type, URL url) throws RpcException {
    String addr = url.getIp() + ":" + url.getPort();
    Class implClass = ServiceClassHolder.getInstance().popServiceClass();
    RestServer server = servers.get(addr);
    if (server == null) {
        server = serverFactory.createServer(url.getParameter(Constants.SERVER_KEY, "jetty"));
        server.start(url);//from ww w . j  av a2s  .  co m
        servers.put(addr, server);
    }

    String contextPath = getContextPath(url);
    if ("servlet".equalsIgnoreCase(url.getParameter(Constants.SERVER_KEY, "jetty"))) {
        ServletContext servletContext = ServletManager.getInstance()
                .getServletContext(ServletManager.EXTERNAL_SERVER_PORT);
        if (servletContext == null) {
            throw new RpcException("No servlet context found. Since you are using server='servlet', "
                    + "make sure that you've configured " + BootstrapListener.class.getName() + " in web.xml");
        }
        String webappPath = servletContext.getContextPath();
        if (StringUtils.isNotEmpty(webappPath)) {
            webappPath = webappPath.substring(1);
            if (!contextPath.startsWith(webappPath)) {
                throw new RpcException("Since you are using server='servlet', "
                        + "make sure that the 'contextpath' property starts with the path of external webapp");
            }
            contextPath = contextPath.substring(webappPath.length());
            if (contextPath.startsWith("/")) {
                contextPath = contextPath.substring(1);
            }
        }
    }

    final Class resourceDef = GetRestful.getRootResourceClass(implClass) != null ? implClass : type;

    server.deploy(resourceDef, impl, contextPath);

    final RestServer s = server;
    return new Runnable() {
        public void run() {
            // TODO due to janus's current architecture,
            // it will be called from registry protocol in the shutdown process and won't appear in logs
            s.undeploy(resourceDef);
        }
    };
}

From source file:org.apache.dubbo.rpc.protocol.rest.RestProtocol.java

@Override
protected <T> Runnable doExport(T impl, Class<T> type, URL url) throws RpcException {
    String addr = getAddr(url);/*w  ww .  j  a  v a 2  s .  c o  m*/
    Class implClass = ServiceClassHolder.getInstance().popServiceClass();
    RestServer server = servers.get(addr);
    if (server == null) {
        server = serverFactory.createServer(url.getParameter(Constants.SERVER_KEY, "jetty"));
        server.start(url);
        servers.put(addr, server);
    }

    String contextPath = getContextPath(url);
    if ("servlet".equalsIgnoreCase(url.getParameter(Constants.SERVER_KEY, "jetty"))) {
        ServletContext servletContext = ServletManager.getInstance()
                .getServletContext(ServletManager.EXTERNAL_SERVER_PORT);
        if (servletContext == null) {
            throw new RpcException("No servlet context found. Since you are using server='servlet', "
                    + "make sure that you've configured " + BootstrapListener.class.getName() + " in web.xml");
        }
        String webappPath = servletContext.getContextPath();
        if (StringUtils.isNotEmpty(webappPath)) {
            webappPath = webappPath.substring(1);
            if (!contextPath.startsWith(webappPath)) {
                throw new RpcException("Since you are using server='servlet', "
                        + "make sure that the 'contextpath' property starts with the path of external webapp");
            }
            contextPath = contextPath.substring(webappPath.length());
            if (contextPath.startsWith("/")) {
                contextPath = contextPath.substring(1);
            }
        }
    }

    final Class resourceDef = GetRestful.getRootResourceClass(implClass) != null ? implClass : type;

    server.deploy(resourceDef, impl, contextPath);

    final RestServer s = server;
    return new Runnable() {
        @Override
        public void run() {
            // TODO due to dubbo's current architecture,
            // it will be called from registry protocol in the shutdown process and won't appear in logs
            s.undeploy(resourceDef);
        }
    };
}

From source file:com.alibaba.dubbo.rpc.protocol.resteasy.RestProtocol.java

protected <T> Runnable doExport(T impl, Class<T> type, URL url) throws RpcException {
    String addr = url.getIp() + ":" + url.getPort();
    Class implClass = ServiceClassHolder.getInstance().popServiceClass();
    RestServer server = servers.get(addr);
    if (server == null) {
        server = serverFactory.createServer(url.getParameter(Constants.SERVER_KEY, "jetty"));
        server.start(url);/*from   ww w. j  ava 2 s  . c o  m*/
        servers.put(addr, server);
    }

    String contextPath = getContextPath(url);
    if ("servlet".equalsIgnoreCase(url.getParameter(Constants.SERVER_KEY, "jetty"))) {
        ServletContext servletContext = ServletManager.getInstance()
                .getServletContext(ServletManager.EXTERNAL_SERVER_PORT);
        if (servletContext == null) {
            throw new RpcException("No servlet context found. Since you are using server='servlet', "
                    + "make sure that you've configured " + BootstrapListener.class.getName() + " in web.xml");
        }
        String webappPath = servletContext.getContextPath();
        if (StringUtils.isNotEmpty(webappPath)) {
            webappPath = webappPath.substring(1);
            if (!contextPath.startsWith(webappPath)) {
                throw new RpcException("Since you are using server='servlet', "
                        + "make sure that the 'contextpath' property starts with the path of external webapp");
            }
            contextPath = contextPath.substring(webappPath.length());
            if (contextPath.startsWith("/")) {
                contextPath = contextPath.substring(1);
            }
        }
    }

    final Class resourceDef = GetRestful.getRootResourceClass(implClass) != null ? implClass : type;

    // dubbo ?
    String version = url.getParameter(Constants.VERSION_KEY);
    if (StringUtils.isNotEmpty(version)) {
        contextPath = version + "/" + contextPath;
    }
    server.deploy(resourceDef, impl, contextPath);

    final RestServer s = server;
    return new Runnable() {
        public void run() {
            // TODO due to dubbo's current architecture,
            // it will be called from registry protocol in the shutdown process and won't appear in logs
            s.undeploy(resourceDef);
        }
    };
}

From source file:org.red5.server.tomcat.TomcatVHostLoader.java

/**
 * Initialization./*from w  ww  . j a v  a 2 s . c o m*/
 */
@SuppressWarnings("cast")
public void init() {
    log.info("Loading tomcat virtual host");

    if (webappFolder != null) {
        //check for match with base webapp root
        if (webappFolder.equals(webappRoot)) {
            log.error("Web application root cannot be the same as base");
            return;
        }
    }

    ClassLoader classloader = Thread.currentThread().getContextClassLoader();

    //ensure we have a host
    if (host == null) {
        host = createHost();
    }

    host.setParentClassLoader(classloader);

    String propertyPrefix = name;
    if (domain != null) {
        propertyPrefix += '_' + domain.replace('.', '_');
    }
    log.debug("Generating name (for props) {}", propertyPrefix);
    System.setProperty(propertyPrefix + ".webapp.root", webappRoot);

    log.info("Virtual host root: {}", webappRoot);

    log.info("Virtual host context id: {}", defaultApplicationContextId);

    // Root applications directory
    File appDirBase = new File(webappRoot);
    // Subdirs of root apps dir
    File[] dirs = appDirBase.listFiles(new TomcatLoader.DirectoryFilter());
    // Search for additional context files
    for (File dir : dirs) {
        String dirName = '/' + dir.getName();
        // check to see if the directory is already mapped
        if (null == host.findChild(dirName)) {
            String webappContextDir = FileUtil.formatPath(appDirBase.getAbsolutePath(), dirName);
            Context ctx = null;
            if ("/root".equals(dirName) || "/root".equalsIgnoreCase(dirName)) {
                log.debug("Adding ROOT context");
                ctx = addContext("/", webappContextDir);
            } else {
                log.debug("Adding context from directory scan: {}", dirName);
                ctx = addContext(dirName, webappContextDir);
            }
            log.debug("Context: {}", ctx);
            webappContextDir = null;
        }
    }
    appDirBase = null;
    dirs = null;

    // Dump context list
    if (log.isDebugEnabled()) {
        for (Container cont : host.findChildren()) {
            log.debug("Context child name: {}", cont.getName());
        }
    }

    engine.addChild(host);

    // Start server
    try {
        log.info("Starting Tomcat virtual host");

        //may not have to do this step for every host
        LoaderBase.setApplicationLoader(new TomcatApplicationLoader(embedded, host, applicationContext));

        for (Container cont : host.findChildren()) {
            if (cont instanceof StandardContext) {
                StandardContext ctx = (StandardContext) cont;

                ServletContext servletContext = ctx.getServletContext();
                log.debug("Context initialized: {}", servletContext.getContextPath());

                //set the hosts id
                servletContext.setAttribute("red5.host.id", getHostId());

                String prefix = servletContext.getRealPath("/");
                log.debug("Path: {}", prefix);

                try {
                    Loader cldr = ctx.getLoader();
                    log.debug("Loader type: {}", cldr.getClass().getName());
                    ClassLoader webClassLoader = cldr.getClassLoader();
                    log.debug("Webapp classloader: {}", webClassLoader);
                    //create a spring web application context
                    XmlWebApplicationContext appctx = new XmlWebApplicationContext();
                    appctx.setClassLoader(webClassLoader);
                    appctx.setConfigLocations(new String[] { "/WEB-INF/red5-*.xml" });
                    //check for red5 context bean
                    if (applicationContext.containsBean(defaultApplicationContextId)) {
                        appctx.setParent(
                                (ApplicationContext) applicationContext.getBean(defaultApplicationContextId));
                    } else {
                        log.warn("{} bean was not found in context: {}", defaultApplicationContextId,
                                applicationContext.getDisplayName());
                        //lookup context loader and attempt to get what we need from it
                        if (applicationContext.containsBean("context.loader")) {
                            ContextLoader contextLoader = (ContextLoader) applicationContext
                                    .getBean("context.loader");
                            appctx.setParent(contextLoader.getContext(defaultApplicationContextId));
                        } else {
                            log.debug("Context loader was not found, trying JMX");
                            MBeanServer mbs = JMXFactory.getMBeanServer();
                            //get the ContextLoader from jmx
                            ObjectName oName = JMXFactory.createObjectName("type", "ContextLoader");
                            ContextLoaderMBean proxy = null;
                            if (mbs.isRegistered(oName)) {
                                proxy = (ContextLoaderMBean) MBeanServerInvocationHandler.newProxyInstance(mbs,
                                        oName, ContextLoaderMBean.class, true);
                                log.debug("Context loader was found");
                                appctx.setParent(proxy.getContext(defaultApplicationContextId));
                            } else {
                                log.warn("Context loader was not found");
                            }
                        }
                    }
                    if (log.isDebugEnabled()) {
                        if (appctx.getParent() != null) {
                            log.debug("Parent application context: {}", appctx.getParent().getDisplayName());
                        }
                    }
                    //
                    appctx.setServletContext(servletContext);
                    //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.refresh();
                } catch (Throwable t) {
                    log.error("Error setting up context: {}", servletContext.getContextPath(), t);
                    if (log.isDebugEnabled()) {
                        t.printStackTrace();
                    }
                }
            }
        }
    } catch (Exception e) {
        log.error("Error loading Tomcat virtual host", e);
    }

}

From source file:net.community.chest.gitcloud.facade.AbstractEnvironmentInitializer.java

protected void contextInitialized(ServletContext context) {
    PlaceholderResolver contextResolver = ServletUtils.toPlaceholderResolver(context);
    Pair<File, Boolean> result = ConfigUtils.resolveGitcloudBase(new AggregatedExtendedPlaceholderResolver(
            contextResolver, ExtendedPlaceholderResolverUtils.SYSPROPS_RESOLVER,
            ExtendedPlaceholderResolverUtils.ENVIRON_RESOLVER));
    File rootDir = result.getLeft();
    Boolean baseExists = result.getRight();
    if (!baseExists.booleanValue()) {
        System.setProperty(ConfigUtils.GITCLOUD_BASE_PROP, rootDir.getAbsolutePath());
        logger.info("contextInitialized(" + context.getContextPath() + ") - added "
                + ConfigUtils.GITCLOUD_BASE_PROP + ": " + ExtendedFileUtils.toString(rootDir));
    } else {//from   ww w  .  ja v a 2  s  .  c  om
        logger.info("contextInitialized(" + context.getContextPath() + ") using "
                + ConfigUtils.GITCLOUD_BASE_PROP + ": " + ExtendedFileUtils.toString(rootDir));
    }

    extractConfigFiles(new File(rootDir, ConfigUtils.CONF_DIR_NAME));
}

From source file:org.red5.server.winstone.WinstoneLoader.java

/**
 * Initialization./*from w w w .  j a  v  a  2 s  . co  m*/
 */
@SuppressWarnings({ "unchecked", "rawtypes" })
public void init() {
    log.info("Loading Winstone context");
    //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");
    log.info("Server root: {}", serverRoot);
    String confRoot = System.getProperty("red5.config_root");
    log.info("Config root: {}", confRoot);
    // configure the webapps folder, make sure we have one
    if (webappFolder == null) {
        // Use default webapps directory
        webappFolder = FileUtil.formatPath(System.getProperty("red5.root"), "/webapps");
    }
    System.setProperty("red5.webapp.root", webappFolder);
    log.info("Application root: {}", webappFolder);
    // create one embedded (server) and use it everywhere
    Map args = new HashMap();
    //args.put("webroot", webappFolder + "/root");
    args.put("webappsDir", webappFolder);
    // Start server
    try {
        log.info("Starting Winstone servlet engine");
        Launcher.initLogger(args);
        // spawns threads, so your application doesn't block
        embedded = new StoneLauncher(args);
        log.trace("Classloader for embedded: {} TCL: {}", Launcher.class.getClassLoader(), originalClassLoader);
        // get the default host
        HostConfiguration host = embedded.getHostGroup().getHostByName(null);
        // set the primary application loader
        LoaderBase.setApplicationLoader(new WinstoneApplicationLoader(host, applicationContext));
        // get root first, we may want to start a spring config internally but for now skip it
        WebAppConfiguration root = host.getWebAppByURI("/");
        log.trace("Root: {}", root);
        // scan the sub directories to determine our context names
        buildContextNameList(webappFolder);
        // loop the other contexts
        for (String contextName : contextNames) {
            WebAppConfiguration ctx = host.getWebAppByURI(contextName);
            // get access to the servlet context
            final ServletContext servletContext = ctx.getContext(contextName);
            log.debug("Context initialized: {}", servletContext.getContextPath());
            //set the hosts id
            servletContext.setAttribute("red5.host.id", host.getHostname());
            // get the path
            String prefix = servletContext.getRealPath("/");
            log.debug("Path: {}", prefix);
            try {
                final ClassLoader cldr = ctx.getLoader();
                log.debug("Loader type: {}", cldr.getClass().getName());
                // 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);
                log.debug("Spring parent context key: {}", parentContextKey);
                //set current threads classloader to the webapp classloader
                Thread.currentThread().setContextClassLoader(cldr);
                //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(cldr);
                        //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, cldr);
                            appctx = (ConfigurableWebApplicationContext) clazz.newInstance();
                        } catch (Throwable e) {
                            throw new RuntimeException("Failed to load webapplication context class.", e);
                        }
                        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);
                        }
                        // 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);
                        //refresh the factory
                        log.trace("Classloader prior to refresh: {}", appctx.getClassLoader());
                        appctx.refresh();
                        if (log.isDebugEnabled()) {
                            log.debug("Red5 app is active: {} running: {}", appctx.isActive(),
                                    appctx.isRunning());
                        }
                    }
                };
                thread.setDaemon(true);
                thread.start();
            } catch (Throwable t) {
                log.error("Error setting up context: {} due to: {}", servletContext.getContextPath(),
                        t.getMessage());
                t.printStackTrace();
            } finally {
                //reset the classloader
                Thread.currentThread().setContextClassLoader(originalClassLoader);
            }
        }
    } catch (Exception e) {
        if (e instanceof BindException || e.getMessage().indexOf("BindException") != -1) {
            log.error(
                    "Error loading Winstone, unable to bind connector. You may not have permission to use the selected port",
                    e);
        } else {
            log.error("Error loading Winstone", e);
        }
    } finally {
        registerJMX();
    }

}

From source file:org.openmrs.web.Listener.java

/**
 * Hacky way to get the current contextPath. This will usually be "openmrs". This method will be
 * obsolete when servlet api ~2.6 comes out...at which point a call like
 * servletContext.getContextRoot() would be sufficient
 *
 * @return current contextPath of this webapp without initial slash
 *//*from  ww w .  j av a  2 s  .  c om*/
private String getContextPath(ServletContext servletContext) {
    // Get the context path without the request.
    String contextPath = "";
    try {
        contextPath = servletContext.getContextPath();
    } catch (NoSuchMethodError ex) {
        // ServletContext.getContextPath() was added in version 2.5 of the Servlet API. Tomcat 5.5
        // has version 2.4 of the servlet API, so we fall back to the hacky code we were previously
        // using
        try {
            String path = servletContext.getResource("/").getPath();
            contextPath = path.substring(0, path.lastIndexOf("/"));
            contextPath = contextPath.substring(contextPath.lastIndexOf("/"));
        } catch (Exception e) {
            log.error(e);
        }
    } catch (Exception e) {
        log.error(e);
    }

    // trim off initial slash if it exists
    if (contextPath.indexOf("/") != -1) {
        contextPath = contextPath.substring(1);
    }

    return contextPath;
}

From source file:no.kantega.publishing.spring.OpenAksessContextLoaderListener.java

@Override
protected void customizeContext(ServletContext servletContext, ConfigurableWebApplicationContext wac) {
    Configuration.setApplicationDirectory(dataDirectory);

    // Make dataDir available as Servlet Context attribute
    servletContext.setAttribute(APPLICATION_DIRECTORY, dataDirectory);

    // Set up @Autowired support
    ApplicationContextUtils.addAutowiredSupport(wac);

    final Configuration configuration = new Configuration(properties);

    if (configuration.getBoolean("caching.enabled", true)) {
        wac.getEnvironment().setActiveProfiles("useCaching");
    }//ww w. java 2  s.c o m

    Aksess.setContextPath(servletContext.getContextPath());
    // Set and load configuration on these classes since they are not DI-based (hackish..)
    Aksess.setConfiguration(configuration);
    Aksess.loadConfiguration();

    // Add ${appDir} property for the Spring Context
    ApplicationContextUtils.addAppDirPropertySupport(wac);

    dbConnectionFactory.setServletContext(servletContext);
    dbConnectionFactory.setConfiguration(configuration);
    dbConnectionFactory.loadConfiguration();

    // Add the Configuration and the ConfigurationLoader as Spring beans
    addConfigurationAndLoaderAsSingletonsInContext(wac, configuration, configurationLoader);

    // Replace ${} properties in Spring with config properties
    addConfigurationPropertyReplacer(wac, properties);

    RootContext.setInstance(wac);

}