Examples of org.apache.catalina.Host

org.apache.catalina.Host
A Host is a Container that represents a virtual host in the Catalina servlet engine. It is useful in the following types of scenarios:
- You wish to use Interceptors that see every single request processed by this particular virtual host.
- You wish to run Catalina in with a standalone HTTP connector, but still want support for multiple virtual hosts.
In general, you would not use a Host when deploying Catalina connected to a web server (such as Apache), because the Connector will have utilized the web server's facilities to determine which Context (or perhaps even which Wrapper) should be utilized to process this request.
The parent Container attached to a Host is generally an Engine, but may be some other implementation, or may be omitted if it is not necessary.
The child containers attached to a Host are generally implementations of Context (representing an individual servlet context). @author Craig R. McClanahan @version $Id: Host.java 1060467 2011-01-18 17:01:07Z markt $

            context.stop();
            context.destroy();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        Host host = (Host) context.getParent();
        host.removeChild(context);
    }

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        // cache the engine
        engines.put(engine.getName(), engine);


        // create a default virtual host; others will be created as needed
        Host host = createHost(engine, hostName);
        hosts.put(engineName + "._DEFAULT", host);


        // configure clustering
        List<ContainerConfig.Container.Property> clusterProps = engineConfig.getPropertiesWithValue("cluster");
        if (clusterProps != null && clusterProps.size() > 1) {

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    protected Host createHost(Engine engine, String hostName) throws ContainerException {
        if (embedded == null) {
            throw new ContainerException("Cannot create Host without Embedded instance!");
        }


        Host host = embedded.createHost(hostName, CATALINA_HOSTS_HOME);
        host.setDeployOnStartup(true);
        host.setAutoDeploy(true);
        host.setRealm(engine.getRealm());
        engine.addChild(host);
        hosts.put(engine.getName() + hostName, host);


        return host;
    }

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        for (Map.Entry<String, String> entry: initParameters.entrySet()) {
            context.addParameter(entry.getKey(), entry.getValue());
        }


        if (UtilValidate.isEmpty(virtualHosts)) {
            Host host = hosts.get(engine.getName() + "._DEFAULT");
            context.setRealm(host.getRealm());
            host.addChild(context);
            context.getMapper().setDefaultHostName(host.getName());
        } else {
            // assume that the first virtual-host will be the default; additional virtual-hosts will be aliases
            Iterator<String> vhi = virtualHosts.iterator();
            String hostName = vhi.next();


            boolean newHost = false;
            Host host = hosts.get(engine.getName() + "." + hostName);
            if (host == null) {
                host = createHost(engine, hostName);
                newHost = true;
            }
            while (vhi.hasNext()) {
                host.addAlias(vhi.next());
            }
            context.setRealm(host.getRealm());
            host.addChild(context);
            context.getMapper().setDefaultHostName(host.getName());


            if (newHost) {
                hosts.put(engine.getName() + "." + hostName, host);
            }
        }

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        if (!logged && useDefault) {
            AccessLog newDefaultAccessLog = defaultAccessLog.get();
            if (newDefaultAccessLog == null) {
                // If we reached this point, this Engine can't have an AccessLog
                // Look in the defaultHost
                Host host = (Host) findChild(getDefaultHost());
                Context context = null;
                boolean checkHost = (host != null);
                if (checkHost && host instanceof ContainerBase) {
                    checkHost = ((ContainerBase) host).started;
                }
                if (checkHost) {
                    newDefaultAccessLog = host.getAccessLog();


                    if (newDefaultAccessLog != null) {
                        if (defaultAccessLog.compareAndSet(null,
                                newDefaultAccessLog)) {
                            AccessLogListener l = new AccessLogListener(this,
                                    host, null);
                            l.install();
                        }
                    } else {
                        // Try the ROOT context of default host
                        context = (Context) host.findChild("");
                        boolean checkContext = (context != null);
                        if (checkContext && context instanceof ContainerBase) {
                            checkContext = ((ContainerBase) context).started;
                        }
                        if (checkContext) {

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        Iterator<Map.Entry<String,String>> iterator =
            sortedHostNamesMap.entrySet().iterator();
        while (iterator.hasNext()) {
            Map.Entry<String,String> entry = iterator.next();
            String hostName = (String) entry.getKey();
            Host host = (Host) engine.findChild(hostName);


            if (host != null ) {
                args = new Object[2];
                args[0] = RequestUtil.filter(hostName);
                String[] aliases = host.findAliases();
                StringBuffer buf = new StringBuffer();
                if (aliases.length > 0) {
                    buf.append(aliases[0]);
                    for (int j = 1; j < aliases.length; j++) {
                        buf.append(", ").append(aliases[j]);

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        if ((uri == null) || (!uri.startsWith("/")))
            return (null);


        Context child = null;
        try {
            Host host = (Host) context.getParent();
            String mapuri = uri;
            while (true) {
                child = (Context) host.findChild(mapuri);
                if (child != null)
                    break;
                int slash = mapuri.lastIndexOf('/');
                if (slash < 0)
                    break;

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                        ",name=" + quotedResourceName);
        } else if (container instanceof Context) {                    
            String path = ((Context)container).getPath();
            if (path.length() < 1)
                path = "/";
            Host host = (Host) ((Context)container).getParent();
            Engine engine = (Engine) host.getParent();
            Service service = engine.getService();
            name = new ObjectName(domain + ":type=DataSource" +
                        ",path=" + path + 
                        ",host=" + host.getName() +
                        ",class=" + resource.getType() +
                        ",name=" + quotedResourceName);
        }
        
        return (name);

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        for (org.apache.catalina.Service service : standardServer.findServices()) {
            if (service.getContainer() instanceof Engine) {
                Engine engine = (Engine) service.getContainer();
                for (Container engineChild : engine.findChildren()) {
                    if (engineChild instanceof Host) {
                        Host host = (Host) engineChild;
                        for (Container hostChild : host.findChildren()) {
                            if (hostChild instanceof StandardContext) {
                                StandardContext standardContext = (StandardContext) hostChild;
                                int state = TomcatHelper.getContextState(standardContext);
                                if (state == 0) {
                                    // context only initialized

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                    ContextInfo contextInfo = addContextInfo(host, standardContext);
                    contextInfo.appInfo = appInfo;
                    contextInfo.deployer = deployer;
                    deployer.manageApp(standardContext);
                } else if (hosts.containsKey(host)) {
                    Host theHost = hosts.get(host);


                    ContextInfo contextInfo = addContextInfo(host, standardContext);
                    contextInfo.appInfo = appInfo;
                    contextInfo.host = theHost;


                    theHost.addChild(standardContext);
                }
            }
        }
    }

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