com.vaadin.flow.server.

java.lang.Object
- com.vaadin.flow.server.Constants

All Implemented Interfaces:

Serializable
```
public final class Constants
extends Object
implements Serializable
```
Constants used by the server side framework.
Not available on the client side, for that use ApplicationConstants.

Since:

1.0

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ALLOW_APPSHELL_ANNOTATIONS` Internal parameter which prevent validation for annotations which are allowed on an AppShell class in non V14 bootstrap mode.
`static String`	`APPLICATION_THEME_ROOT` The name of the application theme root folder.
`static String`	`COMPATIBILITY_RESOURCES_FRONTEND_DEFAULT` Location for the frontend resources in jar files for compatibility mode (also obsolete but supported for NPM mode).
`static String`	`COMPILED_WEB_COMPONENTS_PATH` Deprecated. Use `InitParameters.COMPILED_WEB_COMPONENTS_PATH` instead.
`static String`	`CONNECT_APPLICATION_PROPERTIES_TOKEN`
`static String`	`CONNECT_JAVA_SOURCE_FOLDER_TOKEN`
`static String`	`CONNECT_OPEN_API_FILE_TOKEN`
`static String`	`DEFAULT_EXTERNAL_STATS_URL` Default location to look for the external stats.json.
`static String`	`DISABLE_AUTOMATIC_SERVLET_REGISTRATION` Deprecated. Use `InitParameters.DISABLE_AUTOMATIC_SERVLET_REGISTRATION` instead.
`static String`	`ENABLE_PNPM_DEFAULT_STRING` Constant for whether pnpm is default or not.
`static String`	`EXTERNAL_STATS_FILE` Property boolean for marking stats.json to be fetched from external location.
`static String`	`EXTERNAL_STATS_FILE_TOKEN`
`static String`	`EXTERNAL_STATS_URL` Property String for external stats.json location url.
`static String`	`EXTERNAL_STATS_URL_TOKEN`
`static String`	`FRONTEND_TOKEN`
`static String`	`GENERATED_TOKEN`
`static String`	`I18N_PROVIDER` Deprecated. Use `InitParameters.I18N_PROVIDER` instead.
`static String`	`LOCAL_FRONTEND_RESOURCES_PATH` Default path for local frontend resources packaged for jar add-ons.
`static String`	`META_INF` The path used in the vaadin servlet for handling static resources.
`static String`	`NPM_TOKEN`
`static String`	`PACKAGE_JSON` Name of the `npm` main file.
`static String`	`POLYFILLS_DEFAULT_VALUE`
`static String`	`PROJECT_FRONTEND_GENERATED_DIR_TOKEN`
`static String`	`REQUIRE_HOME_NODE_EXECUTABLE` Deprecated. Use `InitParameters.REQUIRE_HOME_NODE_EXECUTABLE` instead.
`static String`	`REQUIRED_ATMOSPHERE_RUNTIME_VERSION`
`static String`	`RESOURCES_FRONTEND_DEFAULT` Location for the frontend resources in jar files.
`static String`	`RESOURCES_JAR_DEFAULT` Location for the resources in jar files.
`static String`	`RESOURCES_THEME_JAR_DEFAULT` Location for the theme resources in jar files.
`static String`	`SERVLET_PARAMETER_BROTLI` Deprecated. Use `InitParameters.SERVLET_PARAMETER_BROTLI` instead.
`static String`	`SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS` Deprecated. Use `InitParameters.SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS` instead.
`static String`	`SERVLET_PARAMETER_DEVMODE_ENABLE_LIVE_RELOAD` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DEVMODE_ENABLE_LIVE_RELOAD` instead.
`static String`	`SERVLET_PARAMETER_DEVMODE_OPTIMIZE_BUNDLE` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DEVMODE_OPTIMIZE_BUNDLE` instead.
`static String`	`SERVLET_PARAMETER_DEVMODE_WEBPACK_ERROR_PATTERN` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_ERROR_PATTERN` instead.
`static String`	`SERVLET_PARAMETER_DEVMODE_WEBPACK_OPTIONS` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_OPTIONS` instead.
`static String`	`SERVLET_PARAMETER_DEVMODE_WEBPACK_SUCCESS_PATTERN` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_SUCCESS_PATTERN` instead.
`static String`	`SERVLET_PARAMETER_DEVMODE_WEBPACK_TIMEOUT` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_TIMEOUT` instead.
`static String`	`SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION` Deprecated. Use `InitParameters.SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION` instead.
`static String`	`SERVLET_PARAMETER_ENABLE_DEV_SERVER` Deprecated. Use `InitParameters.SERVLET_PARAMETER_ENABLE_DEV_SERVER` instead.
`static String`	`SERVLET_PARAMETER_ENABLE_PNPM` Deprecated. Use `InitParameters.SERVLET_PARAMETER_ENABLE_PNPM` instead.
`static String`	`SERVLET_PARAMETER_HEARTBEAT_INTERVAL` Deprecated. Use `InitParameters.SERVLET_PARAMETER_HEARTBEAT_INTERVAL` instead.
`static String`	`SERVLET_PARAMETER_INITIAL_UIDL` Deprecated. Use `InitParameters.SERVLET_PARAMETER_INITIAL_UIDL` instead.
`static String`	`SERVLET_PARAMETER_JSBUNDLE` Deprecated. Use `InitParameters.SERVLET_PARAMETER_JSBUNDLE` instead.
`static String`	`SERVLET_PARAMETER_MAX_MESSAGE_SUSPEND_TIMEOUT` Deprecated. Use `InitParameters.SERVLET_PARAMETER_MAX_MESSAGE_SUSPEND_TIMEOUT` instead.
`static String`	`SERVLET_PARAMETER_POLYFILLS` Deprecated. Use `InitParameters.SERVLET_PARAMETER_POLYFILLS` instead.
`static String`	`SERVLET_PARAMETER_PRODUCTION_MODE` Deprecated. Use `InitParameters.SERVLET_PARAMETER_PRODUCTION_MODE` instead.
`static String`	`SERVLET_PARAMETER_PUSH_MODE` Deprecated. Use `InitParameters.SERVLET_PARAMETER_PUSH_MODE` instead.
`static String`	`SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING` Deprecated. Use `InitParameters.SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING` instead.
`static String`	`SERVLET_PARAMETER_PUSH_URL` Deprecated. Use `InitParameters.SERVLET_PARAMETER_PUSH_URL` instead.
`static String`	`SERVLET_PARAMETER_REQUEST_TIMING` Deprecated. Use `InitParameters.SERVLET_PARAMETER_REQUEST_TIMING` instead.
`static String`	`SERVLET_PARAMETER_REUSE_DEV_SERVER` Deprecated. Use `InitParameters.SERVLET_PARAMETER_REUSE_DEV_SERVER` instead.
`static String`	`SERVLET_PARAMETER_SEND_URLS_AS_PARAMETERS` Deprecated. Use `InitParameters.SERVLET_PARAMETER_SEND_URLS_AS_PARAMETERS` instead.
`static String`	`SERVLET_PARAMETER_STATISTICS_JSON` Deprecated. Use `InitParameters.SERVLET_PARAMETER_STATISTICS_JSON` instead.
`static String`	`SERVLET_PARAMETER_SYNC_ID_CHECK` Deprecated. Use `InitParameters.SERVLET_PARAMETER_SYNC_ID_CHECK` instead.
`static String`	`SERVLET_PARAMETER_USE_V14_BOOTSTRAP` Deprecated. Use `InitParameters.SERVLET_PARAMETER_USE_V14_BOOTSTRAP` instead.
`static String`	`SERVLET_PARAMETER_WEB_COMPONENT_DISCONNECT` Deprecated. Use `InitParameters.SERVLET_PARAMETER_WEB_COMPONENT_DISCONNECT` instead.
`static int`	`SPRING_BOOT_DEFAULT_LIVE_RELOAD_PORT` Default live reload port as defined in Spring Boot Dev Tools.
`static String`	`STATISTIC_FLOW_BOOTSTRAPHANDLER` UsageEntry name for UsageStatistics BootstrapHandler.
`static String`	`STATISTIC_ROUTING_CLIENT` UsageEntry name for UsageStatistics Routing Client.
`static String`	`STATISTIC_ROUTING_HYBRID` UsageEntry name for UsageStatistics Hybrid.
`static String`	`STATISTIC_ROUTING_SERVER` UsageEntry name for UsageStatistics Routing Server.
`static String`	`STATISTICS_JSON_DEFAULT` Default path for the WebPack profile statistics json file.
`static String`	`URL_PARAMETER_CLOSE_APPLICATION` A request parameter that can be given in browser to force the Vaadin application to close an existing UI and session.
`static String`	`URL_PARAMETER_RESTART_APPLICATION` A request parameter that can be given in browser to force the Vaadin application to create a new UI and session instance, thus overriding `@PreserveOnRefresh` annotation.
`static String`	`VAADIN_BUILD` The static build resources folder.
`static String`	`VAADIN_BUILD_FILES_PATH` The prefix used for all internal static files, relative to context root.
`static String`	`VAADIN_CONFIGURATION` The static configuration resources folder.
`static String`	`VAADIN_MAPPING` The path used in the vaadin servlet for handling static resources.
`static String`	`VAADIN_PREFIX` The prefix used for System property parameters.
`static String`	`VAADIN_SERVLET_RESOURCES` The path to meta-inf/VAADIN/ where static resources are put on the servlet.
`static String`	`VAADIN_VERSIONS_JSON` The name of platform versions file.
`static String`	`VAADIN_WEBAPP` The static resources root folder.
`static String`	`VAADIN_WEBAPP_RESOURCES` The path to webapp/ public resources root.

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - REQUIRED_ATMOSPHERE_RUNTIME_VERSION
```
public static final String REQUIRED_ATMOSPHERE_RUNTIME_VERSION
```
    See Also:
    
    Constant Field Values
  - VAADIN_PREFIX
```
public static final String VAADIN_PREFIX
```
    The prefix used for System property parameters.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PRODUCTION_MODE
```
@Deprecated
public static final String SERVLET_PARAMETER_PRODUCTION_MODE
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_PRODUCTION_MODE instead.
    
    See Also:
    
    Constant Field Values
  - NPM_TOKEN
```
public static final String NPM_TOKEN
```
    See Also:
    
    Constant Field Values
  - FRONTEND_TOKEN
```
public static final String FRONTEND_TOKEN
```
    See Also:
    
    Constant Field Values
  - GENERATED_TOKEN
```
public static final String GENERATED_TOKEN
```
    See Also:
    
    Constant Field Values
  - CONNECT_JAVA_SOURCE_FOLDER_TOKEN
```
public static final String CONNECT_JAVA_SOURCE_FOLDER_TOKEN
```
    See Also:
    
    Constant Field Values
  - CONNECT_APPLICATION_PROPERTIES_TOKEN
```
public static final String CONNECT_APPLICATION_PROPERTIES_TOKEN
```
    See Also:
    
    Constant Field Values
  - CONNECT_OPEN_API_FILE_TOKEN
```
public static final String CONNECT_OPEN_API_FILE_TOKEN
```
    See Also:
    
    Constant Field Values
  - PROJECT_FRONTEND_GENERATED_DIR_TOKEN
```
public static final String PROJECT_FRONTEND_GENERATED_DIR_TOKEN
```
    See Also:
    
    Constant Field Values
  - EXTERNAL_STATS_FILE_TOKEN
```
public static final String EXTERNAL_STATS_FILE_TOKEN
```
    See Also:
    
    Constant Field Values
  - EXTERNAL_STATS_URL_TOKEN
```
public static final String EXTERNAL_STATS_URL_TOKEN
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_USE_V14_BOOTSTRAP
```
@Deprecated
public static final String SERVLET_PARAMETER_USE_V14_BOOTSTRAP
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_USE_V14_BOOTSTRAP instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_INITIAL_UIDL
```
@Deprecated
public static final String SERVLET_PARAMETER_INITIAL_UIDL
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_INITIAL_UIDL instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_ENABLE_DEV_SERVER
```
@Deprecated
public static final String SERVLET_PARAMETER_ENABLE_DEV_SERVER
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_ENABLE_DEV_SERVER instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_REUSE_DEV_SERVER
```
@Deprecated
public static final String SERVLET_PARAMETER_REUSE_DEV_SERVER
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_REUSE_DEV_SERVER instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_REQUEST_TIMING
```
@Deprecated
public static final String SERVLET_PARAMETER_REQUEST_TIMING
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_REQUEST_TIMING instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION
```
@Deprecated
public static final String SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_HEARTBEAT_INTERVAL
```
@Deprecated
public static final String SERVLET_PARAMETER_HEARTBEAT_INTERVAL
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_HEARTBEAT_INTERVAL instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_WEB_COMPONENT_DISCONNECT
```
@Deprecated
public static final String SERVLET_PARAMETER_WEB_COMPONENT_DISCONNECT
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_WEB_COMPONENT_DISCONNECT instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS
```
@Deprecated
public static final String SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PUSH_MODE
```
@Deprecated
public static final String SERVLET_PARAMETER_PUSH_MODE
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_PUSH_MODE instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PUSH_URL
```
@Deprecated
public static final String SERVLET_PARAMETER_PUSH_URL
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_PUSH_URL instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_SYNC_ID_CHECK
```
@Deprecated
public static final String SERVLET_PARAMETER_SYNC_ID_CHECK
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_SYNC_ID_CHECK instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_SEND_URLS_AS_PARAMETERS
```
@Deprecated
public static final String SERVLET_PARAMETER_SEND_URLS_AS_PARAMETERS
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_SEND_URLS_AS_PARAMETERS instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING
```
@Deprecated
public static final String SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_MAX_MESSAGE_SUSPEND_TIMEOUT
```
@Deprecated
public static final String SERVLET_PARAMETER_MAX_MESSAGE_SUSPEND_TIMEOUT
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_MAX_MESSAGE_SUSPEND_TIMEOUT instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_JSBUNDLE
```
@Deprecated
public static final String SERVLET_PARAMETER_JSBUNDLE
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_JSBUNDLE instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_POLYFILLS
```
@Deprecated
public static final String SERVLET_PARAMETER_POLYFILLS
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_POLYFILLS instead.
    
    See Also:
    
    Constant Field Values
  - POLYFILLS_DEFAULT_VALUE
```
public static final String POLYFILLS_DEFAULT_VALUE
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_BROTLI
```
@Deprecated
public static final String SERVLET_PARAMETER_BROTLI
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_BROTLI instead.
    
    See Also:
    
    Constant Field Values
  - I18N_PROVIDER
```
@Deprecated
public static final String I18N_PROVIDER
```
    Deprecated. Use InitParameters.I18N_PROVIDER instead.
    
    See Also:
    
    Constant Field Values
  - DISABLE_AUTOMATIC_SERVLET_REGISTRATION
```
@Deprecated
public static final String DISABLE_AUTOMATIC_SERVLET_REGISTRATION
```
    Deprecated. Use InitParameters.DISABLE_AUTOMATIC_SERVLET_REGISTRATION instead.
    
    See Also:
    
    Constant Field Values
  - COMPILED_WEB_COMPONENTS_PATH
```
@Deprecated
public static final String COMPILED_WEB_COMPONENTS_PATH
```
    Deprecated. Use InitParameters.COMPILED_WEB_COMPONENTS_PATH instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_STATISTICS_JSON
```
@Deprecated
public static final String SERVLET_PARAMETER_STATISTICS_JSON
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_STATISTICS_JSON instead.
    
    See Also:
    
    Constant Field Values
  - STATISTICS_JSON_DEFAULT
```
public static final String STATISTICS_JSON_DEFAULT
```
    Default path for the WebPack profile statistics json file. It can be modified by setting the system property "statistics.file.path".
    
    See Also:
    
    Constant Field Values
  - PACKAGE_JSON
```
public static final String PACKAGE_JSON
```
    Name of the npm main file.
    
    See Also:
    
    Constant Field Values
  - COMPATIBILITY_RESOURCES_FRONTEND_DEFAULT
```
public static final String COMPATIBILITY_RESOURCES_FRONTEND_DEFAULT
```
    Location for the frontend resources in jar files for compatibility mode (also obsolete but supported for NPM mode).
    
    See Also:
    
    Constant Field Values
  - RESOURCES_FRONTEND_DEFAULT
```
public static final String RESOURCES_FRONTEND_DEFAULT
```
    Location for the frontend resources in jar files.
    
    See Also:
    
    Constant Field Values
  - APPLICATION_THEME_ROOT
```
public static final String APPLICATION_THEME_ROOT
```
    The name of the application theme root folder.
    
    See Also:
    
    Constant Field Values
  - RESOURCES_JAR_DEFAULT
```
public static final String RESOURCES_JAR_DEFAULT
```
    Location for the resources in jar files.
    
    See Also:
    
    Constant Field Values
  - RESOURCES_THEME_JAR_DEFAULT
```
public static final String RESOURCES_THEME_JAR_DEFAULT
```
    Location for the theme resources in jar files.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DEVMODE_WEBPACK_TIMEOUT
```
@Deprecated
public static final String SERVLET_PARAMETER_DEVMODE_WEBPACK_TIMEOUT
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_TIMEOUT instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DEVMODE_WEBPACK_SUCCESS_PATTERN
```
@Deprecated
public static final String SERVLET_PARAMETER_DEVMODE_WEBPACK_SUCCESS_PATTERN
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_SUCCESS_PATTERN instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DEVMODE_WEBPACK_ERROR_PATTERN
```
@Deprecated
public static final String SERVLET_PARAMETER_DEVMODE_WEBPACK_ERROR_PATTERN
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_ERROR_PATTERN instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DEVMODE_WEBPACK_OPTIONS
```
@Deprecated
public static final String SERVLET_PARAMETER_DEVMODE_WEBPACK_OPTIONS
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DEVMODE_WEBPACK_OPTIONS instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DEVMODE_OPTIMIZE_BUNDLE
```
@Deprecated
public static final String SERVLET_PARAMETER_DEVMODE_OPTIMIZE_BUNDLE
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DEVMODE_OPTIMIZE_BUNDLE instead.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_ENABLE_PNPM
```
@Deprecated
public static final String SERVLET_PARAMETER_ENABLE_PNPM
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_ENABLE_PNPM instead.
    
    See Also:
    
    Constant Field Values
  - ENABLE_PNPM_DEFAULT_STRING
```
public static final String ENABLE_PNPM_DEFAULT_STRING
```
    Constant for whether pnpm is default or not. Mojos need the value as string and constant, so need to use string instead of boolean.
    
    See Also:
    
    Constant Field Values
  - REQUIRE_HOME_NODE_EXECUTABLE
```
@Deprecated
public static final String REQUIRE_HOME_NODE_EXECUTABLE
```
    Deprecated. Use InitParameters.REQUIRE_HOME_NODE_EXECUTABLE instead.
    
    See Also:
    
    Constant Field Values
  - ALLOW_APPSHELL_ANNOTATIONS
```
public static final String ALLOW_APPSHELL_ANNOTATIONS
```
    Internal parameter which prevent validation for annotations which are allowed on an AppShell class in non V14 bootstrap mode.
    
    See Also:
    
    Constant Field Values
  - META_INF
```
public static final String META_INF
```
    The path used in the vaadin servlet for handling static resources.
    
    See Also:
    
    Constant Field Values
  - VAADIN_MAPPING
```
public static final String VAADIN_MAPPING
```
    The path used in the vaadin servlet for handling static resources.
    
    See Also:
    
    Constant Field Values
  - VAADIN_BUILD
```
public static final String VAADIN_BUILD
```
    The static build resources folder.
    
    See Also:
    
    Constant Field Values
  - VAADIN_CONFIGURATION
```
public static final String VAADIN_CONFIGURATION
```
    The static configuration resources folder.
    
    See Also:
    
    Constant Field Values
  - VAADIN_WEBAPP
```
public static final String VAADIN_WEBAPP
```
    The static resources root folder.
    
    See Also:
    
    Constant Field Values
  - VAADIN_SERVLET_RESOURCES
```
public static final String VAADIN_SERVLET_RESOURCES
```
    The path to meta-inf/VAADIN/ where static resources are put on the servlet.
    
    See Also:
    
    Constant Field Values
  - VAADIN_WEBAPP_RESOURCES
```
public static final String VAADIN_WEBAPP_RESOURCES
```
    The path to webapp/ public resources root.
    
    See Also:
    
    Constant Field Values
  - VAADIN_BUILD_FILES_PATH
```
public static final String VAADIN_BUILD_FILES_PATH
```
    The prefix used for all internal static files, relative to context root.
    
    See Also:
    
    Constant Field Values
  - LOCAL_FRONTEND_RESOURCES_PATH
```
public static final String LOCAL_FRONTEND_RESOURCES_PATH
```
    Default path for local frontend resources packaged for jar add-ons.
    
    See Also:
    
    Constant Field Values
  - EXTERNAL_STATS_FILE
```
public static final String EXTERNAL_STATS_FILE
```
    Property boolean for marking stats.json to be fetched from external location.
    
    See Also:
    
    Constant Field Values
  - EXTERNAL_STATS_URL
```
public static final String EXTERNAL_STATS_URL
```
    Property String for external stats.json location url.
    
    See Also:
    
    Constant Field Values
  - DEFAULT_EXTERNAL_STATS_URL
```
public static final String DEFAULT_EXTERNAL_STATS_URL
```
    Default location to look for the external stats.json.
    
    See Also:
    
    Constant Field Values
  - URL_PARAMETER_RESTART_APPLICATION
```
public static final String URL_PARAMETER_RESTART_APPLICATION
```
    A request parameter that can be given in browser to force the Vaadin application to create a new UI and session instance, thus overriding @PreserveOnRefresh annotation.
    
    See Also:
    
    Constant Field Values
  - URL_PARAMETER_CLOSE_APPLICATION
```
public static final String URL_PARAMETER_CLOSE_APPLICATION
```
    A request parameter that can be given in browser to force the Vaadin application to close an existing UI and session. Unlike URL_PARAMETER_RESTART_APPLICATION, this will not create a new session.
    
    See Also:
    
    Constant Field Values
  - STATISTIC_FLOW_BOOTSTRAPHANDLER
```
public static final String STATISTIC_FLOW_BOOTSTRAPHANDLER
```
    UsageEntry name for UsageStatistics BootstrapHandler.
    
    See Also:
    
    Constant Field Values
  - STATISTIC_ROUTING_SERVER
```
public static final String STATISTIC_ROUTING_SERVER
```
    UsageEntry name for UsageStatistics Routing Server.
    
    See Also:
    
    Constant Field Values
  - STATISTIC_ROUTING_CLIENT
```
public static final String STATISTIC_ROUTING_CLIENT
```
    UsageEntry name for UsageStatistics Routing Client.
    
    See Also:
    
    Constant Field Values
  - STATISTIC_ROUTING_HYBRID
```
public static final String STATISTIC_ROUTING_HYBRID
```
    UsageEntry name for UsageStatistics Hybrid.
    
    See Also:
    
    Constant Field Values
  - VAADIN_VERSIONS_JSON
```
public static final String VAADIN_VERSIONS_JSON
```
    The name of platform versions file.
    
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DEVMODE_ENABLE_LIVE_RELOAD
```
@Deprecated
public static final String SERVLET_PARAMETER_DEVMODE_ENABLE_LIVE_RELOAD
```
    Deprecated. Use InitParameters.SERVLET_PARAMETER_DEVMODE_ENABLE_LIVE_RELOAD instead.
    
    See Also:
    
    Constant Field Values
  - SPRING_BOOT_DEFAULT_LIVE_RELOAD_PORT
```
public static final int SPRING_BOOT_DEFAULT_LIVE_RELOAD_PORT
```
    Default live reload port as defined in Spring Boot Dev Tools.
    
    See Also:
    
    Constant Field Values

com.vaadin.flow.server.

Class Constants

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

REQUIRED_ATMOSPHERE_RUNTIME_VERSION

VAADIN_PREFIX

SERVLET_PARAMETER_PRODUCTION_MODE

NPM_TOKEN

FRONTEND_TOKEN

GENERATED_TOKEN

CONNECT_JAVA_SOURCE_FOLDER_TOKEN

CONNECT_APPLICATION_PROPERTIES_TOKEN

CONNECT_OPEN_API_FILE_TOKEN

PROJECT_FRONTEND_GENERATED_DIR_TOKEN

EXTERNAL_STATS_FILE_TOKEN

EXTERNAL_STATS_URL_TOKEN

SERVLET_PARAMETER_USE_V14_BOOTSTRAP

SERVLET_PARAMETER_INITIAL_UIDL

SERVLET_PARAMETER_ENABLE_DEV_SERVER

SERVLET_PARAMETER_REUSE_DEV_SERVER

SERVLET_PARAMETER_REQUEST_TIMING

SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION

SERVLET_PARAMETER_HEARTBEAT_INTERVAL

SERVLET_PARAMETER_WEB_COMPONENT_DISCONNECT

SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS

SERVLET_PARAMETER_PUSH_MODE

SERVLET_PARAMETER_PUSH_URL

SERVLET_PARAMETER_SYNC_ID_CHECK

SERVLET_PARAMETER_SEND_URLS_AS_PARAMETERS

SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING

SERVLET_PARAMETER_MAX_MESSAGE_SUSPEND_TIMEOUT

SERVLET_PARAMETER_JSBUNDLE

SERVLET_PARAMETER_POLYFILLS

POLYFILLS_DEFAULT_VALUE

SERVLET_PARAMETER_BROTLI

I18N_PROVIDER

DISABLE_AUTOMATIC_SERVLET_REGISTRATION

COMPILED_WEB_COMPONENTS_PATH

SERVLET_PARAMETER_STATISTICS_JSON

STATISTICS_JSON_DEFAULT

PACKAGE_JSON

COMPATIBILITY_RESOURCES_FRONTEND_DEFAULT

RESOURCES_FRONTEND_DEFAULT

APPLICATION_THEME_ROOT

RESOURCES_JAR_DEFAULT

RESOURCES_THEME_JAR_DEFAULT

SERVLET_PARAMETER_DEVMODE_WEBPACK_TIMEOUT

SERVLET_PARAMETER_DEVMODE_WEBPACK_SUCCESS_PATTERN

SERVLET_PARAMETER_DEVMODE_WEBPACK_ERROR_PATTERN

SERVLET_PARAMETER_DEVMODE_WEBPACK_OPTIONS

SERVLET_PARAMETER_DEVMODE_OPTIMIZE_BUNDLE

SERVLET_PARAMETER_ENABLE_PNPM

ENABLE_PNPM_DEFAULT_STRING

REQUIRE_HOME_NODE_EXECUTABLE

ALLOW_APPSHELL_ANNOTATIONS

META_INF

VAADIN_MAPPING

VAADIN_BUILD

VAADIN_CONFIGURATION

VAADIN_WEBAPP

VAADIN_SERVLET_RESOURCES

VAADIN_WEBAPP_RESOURCES

VAADIN_BUILD_FILES_PATH

LOCAL_FRONTEND_RESOURCES_PATH

EXTERNAL_STATS_FILE

EXTERNAL_STATS_URL

DEFAULT_EXTERNAL_STATS_URL

URL_PARAMETER_RESTART_APPLICATION

URL_PARAMETER_CLOSE_APPLICATION

STATISTIC_FLOW_BOOTSTRAPHANDLER

STATISTIC_ROUTING_SERVER

STATISTIC_ROUTING_CLIENT

STATISTIC_ROUTING_HYBRID

VAADIN_VERSIONS_JSON

SERVLET_PARAMETER_DEVMODE_ENABLE_LIVE_RELOAD

SPRING_BOOT_DEFAULT_LIVE_RELOAD_PORT