Examples of org.apache.catalina.Engine

org.apache.catalina.Engine
An Engine is a Container that represents the entire Catalina servlet engine. It is useful in the following types of scenarios:
- You wish to use Interceptors that see every single request processed by the entire engine.
- 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 an Engine 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 child containers attached to an Engine are generally implementations of Host (representing a virtual host) or Context (representing individual an individual servlet context), depending upon the Engine implementation.
If used, an Engine is always the top level Container in a Catalina hierarchy. Therefore, the implementation's setParent() method should throw IllegalArgumentException. @author Craig R. McClanahan @version $Revision: 466595 $ $Date: 2006-10-21 23:24:41 +0100 (Sat, 21 Oct 2006) $

    public static ObjectName createObjectName(String domain,
                                              Host host)
        throws MalformedObjectNameException {


        ObjectName name = null;
        Engine engine = (Engine)host.getParent();
        Service service = engine.getService();
        name = new ObjectName(domain + ":type=Host,host=" +
                              host.getName() + ",service=" +
                              service.getName());
        return (name);

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        if (container instanceof Engine) {
            Service service = ((Engine)container).getService();
            name = new ObjectName(domain + ":type=Loader,service=" +
                              service.getName());
        } else if (container instanceof Host) {
            Engine engine = (Engine) container.getParent();
            Service service = engine.getService();
            name = new ObjectName(domain + ":type=Loader,host=" +
                              container.getName() + ",service=" +
                              service.getName());
        } else if (container instanceof Context) {
            String path = ((Context)container).getPath();
            if (path.length() < 1) {
                path = "/";
            }
            Host host = (Host) container.getParent();
            Engine engine = (Engine) host.getParent();
            Service service = engine.getService();
            name = new ObjectName(domain + ":type=Loader,path=" + path +
                              ",host=" + host.getName() + ",service=" +
                              service.getName());
        } else if (container == null) {
            DefaultContext defaultContext = loader.getDefaultContext();
            if (defaultContext != null) {
                Container parent = defaultContext.getParent();
                if (parent instanceof Engine) {
                    Service service = ((Engine)parent).getService();
                    name = new ObjectName(domain + ":type=DefaultLoader,service=" +
                            service.getName());
                } else if (parent instanceof Host) {
                    Engine engine = (Engine) parent.getParent();
                    Service service = engine.getService();
                    name = new ObjectName(domain + ":type=DefaultLoader,host=" +
                            parent.getName() + ",service=" + service.getName());
                }
            }
        }

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

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        String type = pname.getKeyProperty("type");
        Server server = ServerFactory.getServer();
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        if (type.equals("Context")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            String pathStr = getPathStr(pname.getKeyProperty("path"));
            Context context = (Context) host.findChild(pathStr);
            ((StandardContext)context).addValve(valve);
        } else if (type.equals("Engine")) {
            ((StandardEngine)engine).addValve(valve);
        } else if (type.equals("Host")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            ((StandardHost)host).addValve(valve);
        }


        // Return the corresponding MBean name
        ManagedBean managed = registry.findManagedBean("RequestDumperValve");

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        String type = pname.getKeyProperty("type");
        Server server = ServerFactory.getServer();
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        if (type.equals("Context")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            String pathStr = getPathStr(pname.getKeyProperty("path"));
            Context context = (Context) host.findChild(pathStr);
            ((StandardContext)context).addValve(valve);
        } else if (type.equals("Engine")) {
            ((StandardEngine)engine).addValve(valve);
        } else if (type.equals("Host")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            ((StandardHost)host).addValve(valve);
        }


        // Return the corresponding MBean name
        ManagedBean managed = registry.findManagedBean("SingleSignOn");

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        Server server = ServerFactory.getServer();
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        Host host = (Host) engine.findChild(pname.getKeyProperty("host"));


        // Add context to the host
        host.addChild(context);
        
        // Return the corresponding MBean name

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        Server server = ServerFactory.getServer();
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        engine.addChild(host);


        // Return the corresponding MBean name
        ManagedBean managed = registry.findManagedBean("StandardHost");
        ObjectName oname =
            MBeanUtils.createObjectName(managed.getDomain(), host);

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        Server server = ServerFactory.getServer();
        String type = pname.getKeyProperty("type");
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        if ((type != null) && (type.equals("Context"))) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            String pathStr = getPathStr(pname.getKeyProperty("path"));
            Context context = (Context) host.findChild(pathStr);
            context.setManager(manager);
        } else if ((type != null) && (type.equals("DefaultContext"))) {
            String hostName = pname.getKeyProperty("host");
            DefaultContext defaultContext = null;
            if (hostName == null) {
                defaultContext = engine.getDefaultContext();
            } else {
                Host host = (Host)engine.findChild(hostName);
                defaultContext = host.getDefaultContext();
            }
            if (defaultContext != null ){
                manager.setDefaultContext(defaultContext);
                defaultContext.setManager(manager);

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        String type = pname.getKeyProperty("type");
        Server server = ServerFactory.getServer();
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        if (type.equals("Context")) {        
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            String pathStr = getPathStr(pname.getKeyProperty("path"));
            Context context = (Context) host.findChild(pathStr);
            context.setLogger(logger);
        } else if (type.equals("Engine")) {
            engine.setLogger(logger);
        } else if (type.equals("Host")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            host.setLogger(logger);
        }


        // Return the corresponding MBean name
        ManagedBean managed = registry.findManagedBean("SystemErrLogger");

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        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        String type = pname.getKeyProperty("type");
        Server server = ServerFactory.getServer();
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        if (type.equals("Context")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            String pathStr = getPathStr(pname.getKeyProperty("path"));
            Context context = (Context) host.findChild(pathStr);
            context.setLogger(logger);
        } else if (type.equals("Engine")) {
            engine.setLogger(logger);
        } else if (type.equals("Host")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            host.setLogger(logger);
        }


        // Return the corresponding MBean name
        ManagedBean managed = registry.findManagedBean("SystemOutLogger");

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