<%@ page import="org.archive.crawler.admin.CrawlJobHandler"%><%@ page import="org.archive.crawler.admin.CrawlJob"%><%@ page import="org.archive.crawler.Heritrix"%><%@ page import="org.archive.crawler.framework.CrawlController"%><%    /**     * This include page ensures that the handler exists and is ready to be     * accessed.     */    CrawlJobHandler handler =        (CrawlJobHandler)application.getAttribute("handler");    Heritrix heritrix = (Heritrix)application.getAttribute("heritrix");        // If handler is empty then this is the first time this bit of code is    // being run since the server came online. In that case get or create the    // handler.    if (handler == null) {        if(Heritrix.isSingleInstance()) {            heritrix = Heritrix.getSingleInstance();            handler = heritrix.getJobHandler();            application.setAttribute("heritrix", heritrix);            application.setAttribute("handler", handler);        } else {            // TODO:            // If we get here, then there are multiple heritrix instances            // and we have to put up a screen allowing the user choose between.            // Otherwise, there is no Heritrix instance.  Thats a problem.            throw new RuntimeException("No heritrix instance (or multiple " +                    "to choose from and we haven't implemented this yet)");        }    }        // ensure controller's settingsHandler is always thread-installed     // in web ui threads    if(handler != null) {        CrawlJob job = handler.getCurrentJob();        if(job != null) {            CrawlController controller = job.getController();            if (controller != null) {                controller.installThreadContextSettingsHandler();            }        }    }%>