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) $

     * Retrieve the enclosing Engine for this Manager.
     *
     * @return an Engine object (or null).
     */
    public Engine getEngine() {
        Engine e = null;
        for (Container c = getContext(); e == null && c != null ; c = c.getParent()) {
            if (c instanceof Engine) {
                e = (Engine)c;
            }
        }

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    /**
     * Retrieve the JvmRoute for the enclosing Engine.
     * @return the JvmRoute or null.
     */
    public String getJvmRoute() {
        Engine e = getEngine();
        return e == null ? null : e.getJvmRoute();
    }

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        if (container instanceof Server) {
            return (Server) container;
        }
        if (container instanceof Context) {
            // Could do this in one go. Lots of casts so split out for clarity
            Engine engine =
                (Engine) ((Context) container).getParent().getParent();
            return engine.getService().getServer();
        }
        return null;
    }

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            host = null;
            oname = null;
        } else {
            context = (Context) wrapper.getParent();
            host = (Host) context.getParent();
            Engine engine = (Engine) host.getParent();
            try {
                oname = new ObjectName(engine.getName() 
                        + ":type=Deployer,host=" + host.getName());
            } catch (Exception e) {
                // ?
            }
        }

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            // not registered yet - standalone or API
            if( container instanceof StandardContext) {
                // Register ourself. The container must be a webapp
                try {
                    StandardContext ctx=(StandardContext)container;
                    Engine eng=(Engine)ctx.getParent().getParent();
                    String path = ctx.getPath();
                    if (path.equals("")) {
                        path = "/";
                    }   
                    oname=new ObjectName(ctx.getEngineName() + ":type=Loader,path=" +

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            // Binding the Webapp class loader to the directory context
            DirContextURLStreamHandler.bind
                ((ClassLoader) classLoader, this.container.getResources());


            StandardContext ctx=(StandardContext)container;
            Engine eng=(Engine)ctx.getParent().getParent();
            String path = ctx.getPath();
            if (path.equals("")) {
                path = "/";
            }   
            ObjectName cloname = new ObjectName

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            ((Lifecycle) classLoader).stop();
        DirContextURLStreamHandler.unbind((ClassLoader) classLoader);


        try {
            StandardContext ctx=(StandardContext)container;
            Engine eng=(Engine)ctx.getParent().getParent();
            String path = ctx.getPath();
            if (path.equals("")) {
                path = "/";
            }
            ObjectName cloname = new ObjectName

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        if( log.isDebugEnabled() )
            log.debug("Adding engine (" + engine.getInfo() + ")");


        // Add this Engine to our set of defined Engines
        Engine results[] = new Engine[engines.length + 1];
        for (int i = 0; i < engines.length; i++)
            results[i] = engines[i];
        results[engines.length] = engine;
        engines = results;

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        log = Logger.getLogger(ManagerBase.class);
        
        if( oname==null ) {
            try {
                StandardContext ctx=(StandardContext)this.getContainer();
                Engine eng=(Engine)ctx.getParent().getParent();
                domain=ctx.getEngineName();
                distributable = ctx.getDistributable();
                StandardHost hst=(StandardHost)ctx.getParent();
                String path = ctx.getPath();
                if (path.equals("")) {

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     * Retrieve the enclosing Engine for this Manager.
     *
     * @return an Engine object (or null).
     */
    public Engine getEngine() {
        Engine e = null;
        for (Container c = getContainer(); e == null && c != null ; c = c.getParent()) {
            if (c != null && c instanceof Engine) {
                e = (Engine)c;
            }
        }

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