com.vaadin.annotations

Annotation Type VaadinServletConfiguration

@Retention(value=RUNTIME)
 @Target(value=TYPE)
 @Inherited
public @interface VaadinServletConfiguration

Annotation for configuring subclasses of VaadinServlet. For a VaadinServlet class that has this annotation, the defined values are read during initialization and will be available using DeploymentConfiguration.getApplicationOrSystemProperty(String, String) as well as from specific methods in DeploymentConfiguration. Init params defined in web.xml or the @WebServlet annotation take precedence over values defined in this annotation.

Since:

7.1

Author:

Vaadin Ltd

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
boolean	productionMode Whether Vaadin is in production mode.
Class<? extends UI>	ui Gets the default UI class to use for the servlet.

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
boolean	closeIdleSessions Whether a session should be closed when all its open UIs have been idle for longer than its configured maximum inactivity time.
int	heartbeatInterval The number of seconds between heartbeat requests of a UI, or a non-positive number if heartbeat is disabled.
int	resourceCacheTime The time resources can be cached in the browser, in seconds.
String	widgetset The default widgetset to use for the servlet.

Element Detail

productionMode

@VaadinServletConfiguration.InitParameterName(value="productionMode")
public abstract boolean productionMode

Whether Vaadin is in production mode.

Returns:

true if in production mode, false otherwise.

See Also:

DeploymentConfiguration.isProductionMode()

ui

@VaadinServletConfiguration.InitParameterName(value="UI")
public abstract Class<? extends UI> ui

Gets the default UI class to use for the servlet.

Returns:

the default UI class

resourceCacheTime

@VaadinServletConfiguration.InitParameterName(value="resourceCacheTime")
public abstract int resourceCacheTime

The time resources can be cached in the browser, in seconds. The default value is 3600 seconds, i.e. one hour.

Returns:

the resource cache time

See Also:

DeploymentConfiguration.getResourceCacheTime()

Default:

3600

heartbeatInterval

@VaadinServletConfiguration.InitParameterName(value="heartbeatInterval")
public abstract int heartbeatInterval

The number of seconds between heartbeat requests of a UI, or a non-positive number if heartbeat is disabled. The default value is 300 seconds, i.e. 5 minutes.

Returns:

the time between heartbeats

See Also:

DeploymentConfiguration.getHeartbeatInterval()

Default:

300

closeIdleSessions

@VaadinServletConfiguration.InitParameterName(value="closeIdleSessions")
public abstract boolean closeIdleSessions

Whether a session should be closed when all its open UIs have been idle for longer than its configured maximum inactivity time. The default value is false.

Returns:

true if UIs and sessions receiving only heartbeat requests are eventually closed; false if heartbeat requests extend UI and session lifetime indefinitely

See Also:

DeploymentConfiguration.isCloseIdleSessions()

Default:

false

widgetset

@VaadinServletConfiguration.InitParameterName(value="widgetset")
public abstract String widgetset

The default widgetset to use for the servlet. The default value is "", which will cause com.vaadin.DefaultWidgetSet to be used unless overridden by an init parameter or unless an automatically generated AppWidgetset is used.

Returns:

the default widgetset name

Default:

""