com.vaadin.flow.server.startup

Class ServletDeployer

java.lang.Object

com.vaadin.flow.server.startup.ServletDeployer

public class ServletDeployer
extends Object

Context listener that automatically registers Vaadin servlets.

The servlets registered are:

• Vaadin application servlet, mapped to '/*'
  The servlet won't be registered, if any VaadinServlet is registered already or if there are no classes annotated with Route annotation.
• Frontend files servlet, mapped to '/frontend/*'
  The servlet is registered when the application is started in the development mode or has InitParameters.USE_ORIGINAL_FRONTEND_RESOURCES parameter set to true.
• Static files servlet, mapped to '/VAADIN/static' responsible to resolve files placed in the '[webcontext]/VAADIN/static' folder or in the '[classpath]/META-INF/static' location. It prevents sensible files like 'stats.json' and 'flow-build-info.json' to be served. It manages cache headers based on the '.cache.' and '.nocache.' fragment in the file name.

In addition to the rules above, a servlet won't be registered, if any servlet had been mapped to the same path already or if InitParameters.DISABLE_AUTOMATIC_SERVLET_REGISTRATION system property is set to true.

Since:

1.0

Author:

Vaadin Ltd

See Also:

VaadinServletConfiguration.disableAutomaticServletRegistration()

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ServletDeployer.StubServletConfig Default ServletConfig implementation.

Constructor Summary

Constructors

Constructor and Description
ServletDeployer()

Method Summary

Modifier and Type	Method and Description
void	contextDestroyed(ServletContextEvent sce)
void	contextInitialized(ServletContextEvent sce)
static void	logAppStartupToConsole(ServletContext servletContext, boolean servletAutomaticallyCreated) Prints to sysout a notification to the user that the application has been deployed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServletDeployer

public ServletDeployer()

Method Detail

contextInitialized

public void contextInitialized(ServletContextEvent sce)

logAppStartupToConsole

public static void logAppStartupToConsole(ServletContext servletContext,
                                          boolean servletAutomaticallyCreated)

Prints to sysout a notification to the user that the application has been deployed.

This method is public so that it can be called in add-ons that map servlet automatically but don't use this class for that.

Parameters:

servletContext - the deployed servlet context

servletAutomaticallyCreated - whether the servlet was automatically created

Since:

contextDestroyed

public void contextDestroyed(ServletContextEvent sce)