Examples with ThreadDumpServlet com.codahale.metrics.servlets.ThreadDumpServlet used on opensource projects

Example 1 with ThreadDumpServlet

use of com.codahale.metrics.servlets.ThreadDumpServlet in project drill by apache.

the class WebServer method start.

/**
   * Start the web server including setup.
   * @throws Exception
   */
public void start() throws Exception {
    if (embeddedJetty == null) {
        return;
    }
    final boolean authEnabled = config.getBoolean(ExecConstants.USER_AUTHENTICATION_ENABLED);
    if (authEnabled && !context.getAuthProvider().containsFactory(PlainFactory.SIMPLE_NAME)) {
        logger.warn("Not starting web server. Currently Drill supports web authentication only through " + "username/password. But PLAIN mechanism is not configured.");
        return;
    }
    final ServerConnector serverConnector;
    if (config.getBoolean(ExecConstants.HTTP_ENABLE_SSL)) {
        serverConnector = createHttpsConnector();
    } else {
        serverConnector = createHttpConnector();
    }
    embeddedJetty.addConnector(serverConnector);
    // Add resources
    final ErrorHandler errorHandler = new ErrorHandler();
    errorHandler.setShowStacks(true);
    errorHandler.setShowMessageInTitle(true);
    final ServletContextHandler servletContextHandler = new ServletContextHandler(ServletContextHandler.SESSIONS);
    servletContextHandler.setErrorHandler(errorHandler);
    servletContextHandler.setContextPath("/");
    final ServletHolder servletHolder = new ServletHolder(new ServletContainer(new DrillRestServer(workManager)));
    servletHolder.setInitOrder(1);
    servletContextHandler.addServlet(servletHolder, "/*");
    servletContextHandler.addServlet(new ServletHolder(new MetricsServlet(metrics)), "/status/metrics");
    servletContextHandler.addServlet(new ServletHolder(new ThreadDumpServlet()), "/status/threads");
    final ServletHolder staticHolder = new ServletHolder("static", DefaultServlet.class);
    // Get resource URL for Drill static assets, based on where Drill icon is located
    String drillIconResourcePath = Resource.newClassPathResource(BASE_STATIC_PATH + DRILL_ICON_RESOURCE_RELATIVE_PATH).getURL().toString();
    staticHolder.setInitParameter("resourceBase", drillIconResourcePath.substring(0, drillIconResourcePath.length() - DRILL_ICON_RESOURCE_RELATIVE_PATH.length()));
    staticHolder.setInitParameter("dirAllowed", "false");
    staticHolder.setInitParameter("pathInfoOnly", "true");
    servletContextHandler.addServlet(staticHolder, "/static/*");
    if (authEnabled) {
        servletContextHandler.setSecurityHandler(createSecurityHandler());
        servletContextHandler.setSessionHandler(createSessionHandler(servletContextHandler.getSecurityHandler()));
    }
    if (config.getBoolean(ExecConstants.HTTP_CORS_ENABLED)) {
        FilterHolder holder = new FilterHolder(CrossOriginFilter.class);
        holder.setInitParameter(CrossOriginFilter.ALLOWED_ORIGINS_PARAM, StringUtils.join(config.getStringList(ExecConstants.HTTP_CORS_ALLOWED_ORIGINS), ","));
        holder.setInitParameter(CrossOriginFilter.ALLOWED_METHODS_PARAM, StringUtils.join(config.getStringList(ExecConstants.HTTP_CORS_ALLOWED_METHODS), ","));
        holder.setInitParameter(CrossOriginFilter.ALLOWED_HEADERS_PARAM, StringUtils.join(config.getStringList(ExecConstants.HTTP_CORS_ALLOWED_HEADERS), ","));
        holder.setInitParameter(CrossOriginFilter.ALLOW_CREDENTIALS_PARAM, String.valueOf(config.getBoolean(ExecConstants.HTTP_CORS_CREDENTIALS)));
        for (String path : new String[] { "*.json", "/storage/*/enable/*", "/status*" }) {
            servletContextHandler.addFilter(holder, path, EnumSet.of(DispatcherType.REQUEST));
        }
    }
    embeddedJetty.setHandler(servletContextHandler);
    embeddedJetty.start();
}