java.lang.Object
- com.vaadin.flow.shared.ApplicationConstants

All Implemented Interfaces:

Serializable
```
public class ApplicationConstants
extends Object
implements Serializable
```
A utility class providing static constants. Mostly for internal use.
Also available for the client side part of the framework.

Since:

1.0

Author:

Vaadin Ltd

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`APP_WC_MODE`	Whether the application is run in as a exported Web Component.
`static String`	`BASE_PROTOCOL_PREFIX`	Protocol used for referencing resources relative the base URI of the loaded page.
`static String`	`CLIENT_ENGINE_PATH`	Path to the Vaadin client engine folder, relative to the context root.
`static String`	`CLIENT_ROUTING`	Whether the application is running vaadin-router in client side.
`static String`	`CLIENT_TO_SERVER_ID`	The name of the parameter used to transmit the id of the client to server messages.
`static String`	`CONTENT_TYPE_TEXT_HTML_UTF_8`	Content type to use for text/html responses (should always be UTF-8).
`static String`	`CONTENT_TYPE_TEXT_JAVASCRIPT_UTF_8`	Content type to use for text/javascript responses (should always be UTF-8).
`static String`	`CONTEXT_PROTOCOL_PREFIX`	Protocol used for referencing the application context path.
`static String`	`CONTEXT_ROOT_URL`	Configuration parameter giving the (in some cases relative) URL to the web application context root.
`static String`	`CSRF_TOKEN`	The name of the parameter used to transmit the CSRF token.
`static String`	`CSRF_TOKEN_DEFAULT_VALUE`	Default value to use in case the security protection is disabled.
`static String`	`DEBUG_WINDOW_CONNECTION`	Web socket parameter which identifies connection as live reload connection.
`static String`	`DEV_TOOLS_ENABLED`	Boolean client configuration parameter enabling the development tools.
`static String`	`FRONTEND_URL_ES6`	Configuration parameter for the build URL of ES6 web components.
`static String`	`PUSH_ID_PARAMETER`	Name of the parameter used to transmit the push connection identifier.
`static String`	`REQUEST_LOCATION_PARAMETER`	Parameter for the initial router location when JavaScript bootstrapping.
`static String`	`REQUEST_QUERY_PARAMETER`	Parameter for the initial query string when JavaScript bootstrapping.
`static String`	`REQUEST_TYPE_HEARTBEAT`	Request type parameter value indicating a heartbeat request.
`static String`	`REQUEST_TYPE_INIT`	Request type parameter value indicating an init request.
`static String`	`REQUEST_TYPE_PARAMETER`	Get parameter used in framework requests to identify the request type.
`static String`	`REQUEST_TYPE_PUSH`	Request type parameter value indicating a push request.
`static String`	`REQUEST_TYPE_UIDL`	Request type parameter value indicating a UIDL request.
`static String`	`REQUEST_TYPE_WEBCOMPONENT_RESYNC`	Request type parameter value indicating a WebComponent resynchronization request.
`static String`	`RESYNCHRONIZE_ID`	The name of the parameter used for re-synchronizing.
`static String`	`ROUTER_LINK_ATTRIBUTE`	Attribute name for marking internal router link anchors.
`static String`	`RPC_INVOCATIONS`	The name of the parameter used to transmit RPC invocations.
`static String`	`SERVER_SYNC_ID`	The name of the parameter used to transmit the sync id.
`static String`	`SERVICE_URL`	The URL which should be used to connect server-side VaadinService.
`static String`	`UI_ID`	The name of the parameter used to transmit the id of UI used in given request.
`static String`	`UI_ID_PARAMETER`	Name of the parameter used to transmit UI ids back and forth.
`static String`	`UIDL_PUSH_ID`	The identifier used for Push messages.
`static String`	`UIDL_SECURITY_TOKEN_ID`	The identifier used for the CSRF token.
`static String`	`VAADIN_PUSH_DEBUG_JS`	The name of the debug version of the javascript containing push support.
`static String`	`VAADIN_PUSH_JS`	The name of the javascript containing push support.
`static String`	`VAADIN_STATIC_FILES_PATH`	The prefix used for all internal static files, relative to context root.

Constructor Summary

Constructors
Constructor Description

ApplicationConstants()

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

- Field Detail
  - CONTEXT_PROTOCOL_PREFIX
```
public static final String CONTEXT_PROTOCOL_PREFIX
```
    Protocol used for referencing the application context path.
    
    See Also:
    
    Constant Field Values
  - BASE_PROTOCOL_PREFIX
```
public static final String BASE_PROTOCOL_PREFIX
```
    Protocol used for referencing resources relative the base URI of the loaded page.
    
    See Also:
    
    Constant Field Values
  - UIDL_SECURITY_TOKEN_ID
```
public static final String UIDL_SECURITY_TOKEN_ID
```
    The identifier used for the CSRF token.
    
    See Also:
    
    Constant Field Values
  - UIDL_PUSH_ID
```
public static final String UIDL_PUSH_ID
```
    The identifier used for Push messages.
    
    See Also:
    
    Constant Field Values
  - SERVICE_URL
```
public static final String SERVICE_URL
```
    The URL which should be used to connect server-side VaadinService.
    
    See Also:
    
    Constant Field Values
  - APP_WC_MODE
```
public static final String APP_WC_MODE
```
    Whether the application is run in as a exported Web Component.
    
    See Also:
    
    Constant Field Values
  - CLIENT_ROUTING
```
public static final String CLIENT_ROUTING
```
    Whether the application is running vaadin-router in client side.
    
    See Also:
    
    Constant Field Values
  - CONTEXT_ROOT_URL
```
public static final String CONTEXT_ROOT_URL
```
    Configuration parameter giving the (in some cases relative) URL to the web application context root.
    
    See Also:
    
    Constant Field Values
  - VAADIN_STATIC_FILES_PATH
```
public static final String VAADIN_STATIC_FILES_PATH
```
    The prefix used for all internal static files, relative to context root.
    
    See Also:
    
    Constant Field Values
  - VAADIN_PUSH_JS
```
public static final String VAADIN_PUSH_JS
```
    The name of the javascript containing push support.
    
    See Also:
    
    Constant Field Values
  - VAADIN_PUSH_DEBUG_JS
```
public static final String VAADIN_PUSH_DEBUG_JS
```
    The name of the debug version of the javascript containing push support.
    
    See Also:
    
    Constant Field Values
  - PUSH_ID_PARAMETER
```
public static final String PUSH_ID_PARAMETER
```
    Name of the parameter used to transmit the push connection identifier.
    
    See Also:
    
    Constant Field Values
  - RPC_INVOCATIONS
```
public static final String RPC_INVOCATIONS
```
    The name of the parameter used to transmit RPC invocations.
    
    See Also:
    
    Constant Field Values
  - CSRF_TOKEN
```
public static final String CSRF_TOKEN
```
    The name of the parameter used to transmit the CSRF token.
    
    See Also:
    
    Constant Field Values
  - SERVER_SYNC_ID
```
public static final String SERVER_SYNC_ID
```
    The name of the parameter used to transmit the sync id. The value can be set to -1 e.g. when testing with pre-recorded requests to make the framework ignore the sync id.
    
    See Also:
    
    UIInternals.getServerSyncId(), Constant Field Values
  - CLIENT_TO_SERVER_ID
```
public static final String CLIENT_TO_SERVER_ID
```
    The name of the parameter used to transmit the id of the client to server messages.
    
    See Also:
    
    Constant Field Values
  - UI_ID
```
public static final String UI_ID
```
    The name of the parameter used to transmit the id of UI used in given request.
    
    See Also:
    
    Constant Field Values
  - CSRF_TOKEN_DEFAULT_VALUE
```
public static final String CSRF_TOKEN_DEFAULT_VALUE
```
    Default value to use in case the security protection is disabled.
    
    See Also:
    
    Constant Field Values
  - RESYNCHRONIZE_ID
```
public static final String RESYNCHRONIZE_ID
```
    The name of the parameter used for re-synchronizing.
    
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE_TEXT_HTML_UTF_8
```
public static final String CONTENT_TYPE_TEXT_HTML_UTF_8
```
    Content type to use for text/html responses (should always be UTF-8).
    
    See Also:
    
    Constant Field Values
  - CONTENT_TYPE_TEXT_JAVASCRIPT_UTF_8
```
public static final String CONTENT_TYPE_TEXT_JAVASCRIPT_UTF_8
```
    Content type to use for text/javascript responses (should always be UTF-8).
    
    See Also:
    
    Constant Field Values
  - UI_ID_PARAMETER
```
public static final String UI_ID_PARAMETER
```
    Name of the parameter used to transmit UI ids back and forth.
    
    See Also:
    
    Constant Field Values
  - CLIENT_ENGINE_PATH
```
public static final String CLIENT_ENGINE_PATH
```
    Path to the Vaadin client engine folder, relative to the context root.
    
    See Also:
    
    Constant Field Values
  - REQUEST_LOCATION_PARAMETER
```
public static final String REQUEST_LOCATION_PARAMETER
```
    Parameter for the initial router location when JavaScript bootstrapping. It is optional when REQUEST_TYPE_PARAMETER has the REQUEST_TYPE_INIT value
    
    See Also:
    
    Constant Field Values
  - REQUEST_QUERY_PARAMETER
```
public static final String REQUEST_QUERY_PARAMETER
```
    Parameter for the initial query string when JavaScript bootstrapping.
    
    See Also:
    
    Constant Field Values
  - REQUEST_TYPE_PARAMETER
```
public static final String REQUEST_TYPE_PARAMETER
```
    Get parameter used in framework requests to identify the request type.
    
    See Also:
    
    Constant Field Values
  - REQUEST_TYPE_INIT
```
public static final String REQUEST_TYPE_INIT
```
    Request type parameter value indicating an init request.
    
    See Also:
    
    Constant Field Values
  - REQUEST_TYPE_UIDL
```
public static final String REQUEST_TYPE_UIDL
```
    Request type parameter value indicating a UIDL request.
    
    See Also:
    
    Constant Field Values
  - REQUEST_TYPE_HEARTBEAT
```
public static final String REQUEST_TYPE_HEARTBEAT
```
    Request type parameter value indicating a heartbeat request.
    
    See Also:
    
    Constant Field Values
  - REQUEST_TYPE_PUSH
```
public static final String REQUEST_TYPE_PUSH
```
    Request type parameter value indicating a push request.
    
    See Also:
    
    Constant Field Values
  - REQUEST_TYPE_WEBCOMPONENT_RESYNC
```
public static final String REQUEST_TYPE_WEBCOMPONENT_RESYNC
```
    Request type parameter value indicating a WebComponent resynchronization request.
    
    See Also:
    
    Constant Field Values
  - ROUTER_LINK_ATTRIBUTE
```
public static final String ROUTER_LINK_ATTRIBUTE
```
    Attribute name for marking internal router link anchors.
    
    See Also:
    
    Constant Field Values
  - FRONTEND_URL_ES6
```
public static final String FRONTEND_URL_ES6
```
    Configuration parameter for the build URL of ES6 web components.
    
    See Also:
    
    Constant Field Values
  - DEBUG_WINDOW_CONNECTION
```
public static final String DEBUG_WINDOW_CONNECTION
```
    Web socket parameter which identifies connection as live reload connection.
    
    See Also:
    
    Constant Field Values
  - DEV_TOOLS_ENABLED
```
public static final String DEV_TOOLS_ENABLED
```
    Boolean client configuration parameter enabling the development tools.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ApplicationConstants
```
public ApplicationConstants()
```

Class ApplicationConstants

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

CONTEXT_PROTOCOL_PREFIX

BASE_PROTOCOL_PREFIX

UIDL_SECURITY_TOKEN_ID

UIDL_PUSH_ID

SERVICE_URL

APP_WC_MODE

CLIENT_ROUTING

CONTEXT_ROOT_URL

VAADIN_STATIC_FILES_PATH

VAADIN_PUSH_JS

VAADIN_PUSH_DEBUG_JS

PUSH_ID_PARAMETER

RPC_INVOCATIONS

CSRF_TOKEN

SERVER_SYNC_ID

CLIENT_TO_SERVER_ID

UI_ID

CSRF_TOKEN_DEFAULT_VALUE

RESYNCHRONIZE_ID

CONTENT_TYPE_TEXT_HTML_UTF_8

CONTENT_TYPE_TEXT_JAVASCRIPT_UTF_8

UI_ID_PARAMETER

CLIENT_ENGINE_PATH

REQUEST_LOCATION_PARAMETER

REQUEST_QUERY_PARAMETER

REQUEST_TYPE_PARAMETER

REQUEST_TYPE_INIT

REQUEST_TYPE_UIDL

REQUEST_TYPE_HEARTBEAT

REQUEST_TYPE_PUSH

REQUEST_TYPE_WEBCOMPONENT_RESYNC

ROUTER_LINK_ATTRIBUTE

FRONTEND_URL_ES6

DEBUG_WINDOW_CONNECTION

DEV_TOOLS_ENABLED

Constructor Detail

ApplicationConstants