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) $

        // 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.setRealm(realm);
        } else if (type.equals("Engine")) {
            engine.setRealm(realm);
        } else if (type.equals("Host")) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            host.setRealm(realm);
        }


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

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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.setLoader(loader);
        } 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 ){
                loader.setDefaultContext(defaultContext);
                defaultContext.setLoader(loader);

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        String serviceName = oname.getKeyProperty("service");
        String hostName = oname.getKeyProperty("host");
        String contextName = getPathStr(oname.getKeyProperty("path"));
        Server server = ServerFactory.getServer();
        Service service = server.findService(serviceName);
        Engine engine = (Engine) service.getContainer();
        Host host = (Host) engine.findChild(hostName);
        Context context = (Context) host.findChild(contextName);


        // Remove this component from its parent component
        host.removeChild(context);

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        ObjectName oname = new ObjectName(name);
        String serviceName = oname.getKeyProperty("service");
        String hostName = oname.getKeyProperty("host");
        Server server = ServerFactory.getServer();
        Service service = server.findService(serviceName);
        Engine engine = (Engine) service.getContainer();
        Host host = (Host) engine.findChild(hostName);


        // Remove this component from its parent component
        engine.removeChild(host);


    }

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        ObjectName oname = new ObjectName(name);
        String type = oname.getKeyProperty("type");
        String serviceName = oname.getKeyProperty("service");
        Server server = ServerFactory.getServer();
        Service service = server.findService(serviceName);
        Engine engine = (Engine) service.getContainer();  
        String hostName = oname.getKeyProperty("host");
        if ((type != null) && (type.equals("Loader"))) {      
            String contextName = getPathStr(oname.getKeyProperty("path"));
            Host host = (Host) engine.findChild(hostName);
            Context context = (Context) host.findChild(contextName);
            // Remove this component from its parent component
            context.setLoader(null);
        } else if ((type != null) && (type.equals("DefaultLoader"))) {
            DefaultContext defaultContext = null;
            if (hostName == null) {    
                defaultContext = engine.getDefaultContext();
            } else {
                Host host = (Host) engine.findChild(hostName);
                defaultContext = host.getDefaultContext();
            }
            if (defaultContext != null) {
                // Remove this component from its parent component
                defaultContext.setLoader(null);

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        ObjectName oname = new ObjectName(name);
        String type = oname.getKeyProperty("type");
        String serviceName = oname.getKeyProperty("service");
        Server server = ServerFactory.getServer();
        Service service = server.findService(serviceName);
        Engine engine = (Engine) service.getContainer();  
        String hostName = oname.getKeyProperty("host");
        if ((type != null) && (type.equals("Manager"))) {      
            String contextName = getPathStr(oname.getKeyProperty("path"));
            Host host = (Host) engine.findChild(hostName);
            Context context = (Context) host.findChild(contextName);
            // Remove this component from its parent component
            context.setManager(null);
        } else if ((type != null) && (type.equals("DefaultManager"))) {
            DefaultContext defaultContext = null;
            if (hostName == null) {    
                defaultContext = engine.getDefaultContext();
            } else {
                Host host = (Host) engine.findChild(hostName);
                defaultContext = host.getDefaultContext();
            }
            if (defaultContext != null) {
                // Remove this component from its parent component
                defaultContext.setManager(null);

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        String fileSeparator = System.getProperty("file.separator");
        if (!tmpDir.endsWith(fileSeparator))
            tmpDir = tmpDir + fileSeparator;
        tomcatServer.setCatalinaHome(tmpDir + "tomcat");


        final Engine engine = tomcatServer.createEngine();
        engine.setDefaultHost("localhost");


        final Host host = tomcatServer.createHost("localhost", expandedPath);
        engine.addChild(host);


        final Context context = tomcatServer.createContext(contextPath, expandedPath);


        // Without a servlet the filter will not get run.
        final Wrapper wrapper = context.createWrapper();

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        for (int j = 0; j < connectors.length; j++) {
            createMBeans(connectors[j]);
        }


        // Create the MBean for the associated Engine and friends
        Engine engine = (Engine) service.getContainer();
        if (engine != null) {
            createMBeans(engine);
        }


    }

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     * @exception Exception if an exception is thrown during MBean destruction
     */
    protected void destroyMBeans(Service service) throws Exception {


        // Deregister the MBeans for the associated Engine
        Engine engine = (Engine) service.getContainer();
        if (engine != null) {
            destroyMBeans(engine);
        }


        // Deregister the MBeans for the corresponding Connectors

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        // Find any components that have already been initialized since the
        // MBean listener won't be notified as those components will have
        // already registered their MBeans
        findDefaultHost();
        
        Engine engine = (Engine) connector.getService().getContainer();
        addListeners(engine);
        
        Container[] conHosts = engine.findChildren();
        for (Container conHost : conHosts) {
            Host host = (Host) conHost;
            if (!LifecycleState.NEW.equals(host.getState())) {
                // Registering the host will register the context and wrappers
                registerHost(host);

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