Make Tomcat shut down automatically if any component fails to start up (written for tomcat version 7.0.47)

StartTomcat.java

import static org.apache.catalina.Lifecycle.*;
import static org.apache.catalina.LifecycleState.*;
import org.apache.catalina.*;
import org.apache.catalina.connector.Connector;
import org.apache.catalina.startup.Tomcat;

  // ...
  tomcat.getServer().addLifecycleListener(new LifecycleListener() {
    @Override
    public void lifecycleEvent(final LifecycleEvent event) {
      boolean isInit = AFTER_INIT_EVENT.equals(event.getType());
      if (isInit || AFTER_START_EVENT.equals(event.getType())) {
        Server server = (Server) event.getLifecycle();
        boolean failed = checkServer(isInit, server);
        if (failed) {
          LOGGER.error("Startup failure, initiating TomCat shutdown");
          triggerShutdown(isInit, server);
        } else if (!isInit) {
          LOGGER.info("Startup successful");
        }
      }
    }

    private boolean checkServer(final boolean isInit, final Server server) {
      boolean failed = checkState(isInit, server);
      for (Service service : server.findServices()) {
        failed |= checkService(isInit, service);
      }
      return failed;
    }

    private boolean checkService(final boolean isInit, final Service service) {
      boolean failed = checkState(isInit, service);
      failed |= checkContainer(isInit, service.getContainer());
      for (Connector connector : service.findConnectors()) {
        failed |= checkState(isInit, connector);
      }
      for (Executor executor : service.findExecutors()) {
        failed |= checkState(isInit, executor);
      }
      return failed;
    }

    private boolean checkContainer(final boolean isInit, final Container container) {
      boolean failed = checkState(isInit, container);
      for (Container child : container.findChildren()) {
        failed |= checkContainer(isInit, child);
      }
      return failed;
    }

    private boolean checkState(final boolean isInit, final Lifecycle lifecycle) {
      LifecycleState state = lifecycle.getState();
      if (isInit ? state != NEW && state != INITIALIZED : state != STARTED) {
        LOGGER.error("Component {} failed to {}: state {}", lifecycle, isInit ? "initialize" : "start", state);
        return true;
      }
      return false;
    }

    private void triggerShutdown(final boolean isInit, final Server server) {
      if (isInit) {
        throw new RuntimeException("One or more TomCat components failed to initialize");
      }
      try {
        server.stop();
        server.destroy();
      } catch (LifecycleException e) {
        // ignore
      }
    }
  });

  // ...
  tomcat.start();

Hi, is it ok with you if I copy this and publish it with some modifications as a maven artifact?

Go ahead :) Where is it going?

rev 3: In addition to checking for failures AFTER_START, also check AFTER_INIT in order to fail faster on errors during init

how do I add this to web.xml?