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 $

    protected void antiLocking() {


        if ((context instanceof StandardContext) 
            && ((StandardContext) context).getAntiResourceLocking()) {
            
            Host host = (Host) context.getParent();
            String appBase = host.getAppBase();
            String docBase = context.getDocBase();
            if (docBase == null)
                return;
            if (originalDocBase == null) {
                originalDocBase = docBase;

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        for (i = 0; i < wrapperListeners.length; i++) {
            context.removeWrapperListener(wrapperListeners[i]);
        }


        // Remove (partially) folders and files created by antiLocking
        Host host = (Host) context.getParent();
        String appBase = host.getAppBase();
        String docBase = context.getDocBase();
        if ((docBase != null) && (originalDocBase != null)) {
            File docBaseFile = new File(docBase);
            if (!docBaseFile.isAbsolute()) {
                docBaseFile = new File(appBase, docBase);

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     * Adjust docBase.
     */
    protected void fixDocBase()
        throws IOException {
        
        Host host = (Host) context.getParent();
        String appBase = host.getAppBase();


        boolean unpackWARs = true;
        if (host instanceof StandardHost) {
            unpackWARs = ((StandardHost) host).isUnpackWARs() 
                && ((StandardContext) context).getUnpackWAR();

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        throws IOException {


        if ((context instanceof StandardContext) 
            && ((StandardContext) context).getAntiResourceLocking()) {
            
            Host host = (Host) context.getParent();
            String appBase = host.getAppBase();
            String docBase = context.getDocBase();
            if (docBase == null)
                return;
            if (originalDocBase == null) {
                originalDocBase = docBase;

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        for (i = 0; i < wrapperListeners.length; i++) {
            context.removeWrapperListener(wrapperListeners[i]);
        }


        // Remove (partially) folders and files created by antiLocking
        Host host = (Host) context.getParent();
        String appBase = host.getAppBase();
        String docBase = context.getDocBase();
        if ((docBase != null) && (originalDocBase != null)) {
            File docBaseFile = new File(docBase);
            if (!docBaseFile.isAbsolute()) {
                docBaseFile = new File(appBase, docBase);

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   public synchronized void containerEvent(ContainerEvent event)
   {
      if (event.getData() instanceof Host)
      {
         Host host = (Host)event.getData();


         //
         if (Container.ADD_CHILD_EVENT.equals(event.getType()))
         {
            registerHost(host);

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      Container[] childrenContainers = engine.findChildren();
      for (Container childContainer : childrenContainers)
      {
         if (childContainer instanceof Host)
         {
            Host host = (Host)childContainer;
            registerHost(host);
         }
      }


      //

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      Container[] childrenContainers = engine.findChildren();
      for (Container childContainer : childrenContainers)
      {
         if (childContainer instanceof Host)
         {
            Host host = (Host)childContainer;
            unregisterHost(host);
         }
      }


      //

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        } else if (container instanceof Context) {
                    String path = ((Context)container).getPath();
                    if (path.length() < 1) {
                        path = "/";
                    }
                    Host host = (Host) container.getParent();
                    parentName=",path=" + path + ",host=" +
                            host.getName();
        } else if (container instanceof Wrapper) {
            Context ctx = (Context) container.getParent();
            String path = ctx.getPath();
            if (path.length() < 1) {
                path = "/";
            }
            Host host = (Host) ctx.getParent();
            parentName=",servlet=" + container.getName() +
                    ",path=" + path + ",host=" + host.getName();
        }


        String className=this.getClass().getName();
        int period = className.lastIndexOf('.');
        if (period >= 0)

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   public synchronized void containerEvent(ContainerEvent event)
   {
      if (event.getData() instanceof Host)
      {
         Host host = (Host)event.getData();


         //
         if (Container.ADD_CHILD_EVENT.equals(event.getType()))
         {
            registerHost(host);

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