All Known Implementing Classes:

LegacyVaadinServlet, VaadinServlet
```
public interface Constants
```
Internal constants used by both the client and the server side framework.

Since:

6.2

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ATMOSPHERE_MISSING_ERROR`
`static String`	`CANNOT_ACQUIRE_CLASSLOADER_SEVERE`
`static int`	`DEFAULT_BUFFER_SIZE`
`static int`	`DEFAULT_THEME_CACHETIME`
`static String`	`DEFAULT_THEME_NAME`
`static String`	`DEFAULT_WIDGETSET`
`static String`	`ERROR_NO_UI_FOUND`	Deprecated. As of 7.1, this message is no longer used and might be removed from the code.
`static String`	`INVALID_ATMOSPHERE_VERSION_WARNING`
`static String`	`INVALID_SECURITY_KEY_MSG`
`static int`	`MAX_BUFFER_SIZE`
`static String`	`NOT_PRODUCTION_MODE_INFO`
`static String`	`PARAMETER_VAADIN_RESOURCES`
`static String`	`PARAMETER_WIDGETSET`
`static String`	`PORTAL_PARAMETER_VAADIN_RESOURCE_PATH`
`static String`	`PORTAL_PARAMETER_VAADIN_THEME`
`static String`	`PORTAL_PARAMETER_VAADIN_WIDGETSET`
`static String`	`PORTLET_CONTEXT`
`static String`	`PUSH_NOT_SUPPORTED_ERROR`
`static String`	`REQUIRED_ATMOSPHERE_RUNTIME_JAKARTA_VERSION`
`static String`	`REQUIRED_ATMOSPHERE_RUNTIME_VERSION`
`static String`	`SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS`
`static String`	`SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION`
`static String`	`SERVLET_PARAMETER_HEARTBEAT_INTERVAL`
`static String`	`SERVLET_PARAMETER_LEGACY_DESIGN_PREFIX`	Name of system or context property to write declarative syntax with the old "v-" prefix or with the new "vaadin-" prefix.
`static String`	`SERVLET_PARAMETER_PRODUCTION_MODE`
`static String`	`SERVLET_PARAMETER_PUSH_MODE`
`static String`	`SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING`
`static String`	`SERVLET_PARAMETER_RESOURCE_CACHE_TIME`
`static String`	`SERVLET_PARAMETER_SENDURLSASPARAMETERS`
`static String`	`SERVLET_PARAMETER_SYNC_ID_CHECK`
`static String`	`SERVLET_PARAMETER_UI_PRIORITY`
`static String`	`SERVLET_PARAMETER_UI_PROVIDER`
`static String`	`THEME_DIR_PATH`
`static String`	`URL_PARAMETER_THEME`
`static String`	`WARNING_HEARTBEAT_INTERVAL_NOT_NUMERIC`
`static String`	`WARNING_PUSH_MODE_NOT_RECOGNIZED`
`static String`	`WARNING_RESOURCE_CACHING_TIME_NOT_NUMERIC`
`static String`	`WARNING_XSRF_PROTECTION_DISABLED`
`static String`	`WIDGETSET_DIR_PATH`
`static String`	`WIDGETSET_MISMATCH_INFO`

- Field Detail
  - NOT_PRODUCTION_MODE_INFO
```
static final String NOT_PRODUCTION_MODE_INFO
```
    See Also:
    
    Constant Field Values
  - WARNING_XSRF_PROTECTION_DISABLED
```
static final String WARNING_XSRF_PROTECTION_DISABLED
```
    See Also:
    
    Constant Field Values
  - WARNING_RESOURCE_CACHING_TIME_NOT_NUMERIC
```
static final String WARNING_RESOURCE_CACHING_TIME_NOT_NUMERIC
```
    See Also:
    
    Constant Field Values
  - WARNING_HEARTBEAT_INTERVAL_NOT_NUMERIC
```
static final String WARNING_HEARTBEAT_INTERVAL_NOT_NUMERIC
```
    See Also:
    
    Constant Field Values
  - WARNING_PUSH_MODE_NOT_RECOGNIZED
```
static final String WARNING_PUSH_MODE_NOT_RECOGNIZED
```
    See Also:
    
    Constant Field Values
  - WIDGETSET_MISMATCH_INFO
```
static final String WIDGETSET_MISMATCH_INFO
```
    See Also:
    
    Constant Field Values
  - REQUIRED_ATMOSPHERE_RUNTIME_VERSION
```
static final String REQUIRED_ATMOSPHERE_RUNTIME_VERSION
```
    See Also:
    
    Constant Field Values
  - REQUIRED_ATMOSPHERE_RUNTIME_JAKARTA_VERSION
```
static final String REQUIRED_ATMOSPHERE_RUNTIME_JAKARTA_VERSION
```
    See Also:
    
    Constant Field Values
  - INVALID_ATMOSPHERE_VERSION_WARNING
```
static final String INVALID_ATMOSPHERE_VERSION_WARNING
```
    See Also:
    
    Constant Field Values
  - ATMOSPHERE_MISSING_ERROR
```
static final String ATMOSPHERE_MISSING_ERROR
```
  - PUSH_NOT_SUPPORTED_ERROR
```
static final String PUSH_NOT_SUPPORTED_ERROR
```
  - CANNOT_ACQUIRE_CLASSLOADER_SEVERE
```
static final String CANNOT_ACQUIRE_CLASSLOADER_SEVERE
```
    See Also:
    
    Constant Field Values
  - URL_PARAMETER_THEME
```
static final String URL_PARAMETER_THEME
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PRODUCTION_MODE
```
static final String SERVLET_PARAMETER_PRODUCTION_MODE
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION
```
static final String SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_RESOURCE_CACHE_TIME
```
static final String SERVLET_PARAMETER_RESOURCE_CACHE_TIME
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_HEARTBEAT_INTERVAL
```
static final String SERVLET_PARAMETER_HEARTBEAT_INTERVAL
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS
```
static final String SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PUSH_MODE
```
static final String SERVLET_PARAMETER_PUSH_MODE
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_UI_PROVIDER
```
static final String SERVLET_PARAMETER_UI_PROVIDER
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_UI_PRIORITY
```
static final String SERVLET_PARAMETER_UI_PRIORITY
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_SYNC_ID_CHECK
```
static final String SERVLET_PARAMETER_SYNC_ID_CHECK
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_SENDURLSASPARAMETERS
```
static final String SERVLET_PARAMETER_SENDURLSASPARAMETERS
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING
```
static final String SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING
```
    See Also:
    
    Constant Field Values
  - SERVLET_PARAMETER_LEGACY_DESIGN_PREFIX
```
static final String SERVLET_PARAMETER_LEGACY_DESIGN_PREFIX
```
    Name of system or context property to write declarative syntax with the old "v-" prefix or with the new "vaadin-" prefix. The default value depends on the Vaadin branch used.
    
    Since:
    
    7.5.7
    
    See Also:
    
    DesignContext, Constant Field Values
  - PARAMETER_VAADIN_RESOURCES
```
static final String PARAMETER_VAADIN_RESOURCES
```
    See Also:
    
    Constant Field Values
  - DEFAULT_BUFFER_SIZE
```
static final int DEFAULT_BUFFER_SIZE
```
    See Also:
    
    Constant Field Values
  - MAX_BUFFER_SIZE
```
static final int MAX_BUFFER_SIZE
```
    See Also:
    
    Constant Field Values
  - THEME_DIR_PATH
```
static final String THEME_DIR_PATH
```
    See Also:
    
    Constant Field Values
  - DEFAULT_THEME_CACHETIME
```
static final int DEFAULT_THEME_CACHETIME
```
    See Also:
    
    Constant Field Values
  - WIDGETSET_DIR_PATH
```
static final String WIDGETSET_DIR_PATH
```
    See Also:
    
    Constant Field Values
  - DEFAULT_WIDGETSET
```
static final String DEFAULT_WIDGETSET
```
    See Also:
    
    Constant Field Values
  - PARAMETER_WIDGETSET
```
static final String PARAMETER_WIDGETSET
```
    See Also:
    
    Constant Field Values
  - ERROR_NO_UI_FOUND
```
@Deprecated
static final String ERROR_NO_UI_FOUND
```
    Deprecated.
    As of 7.1, this message is no longer used and might be removed from the code.
    
    See Also:
    
    Constant Field Values
  - DEFAULT_THEME_NAME
```
static final String DEFAULT_THEME_NAME
```
    See Also:
    
    Constant Field Values
  - INVALID_SECURITY_KEY_MSG
```
static final String INVALID_SECURITY_KEY_MSG
```
    See Also:
    
    Constant Field Values
  - PORTAL_PARAMETER_VAADIN_WIDGETSET
```
static final String PORTAL_PARAMETER_VAADIN_WIDGETSET
```
    See Also:
    
    Constant Field Values
  - PORTAL_PARAMETER_VAADIN_RESOURCE_PATH
```
static final String PORTAL_PARAMETER_VAADIN_RESOURCE_PATH
```
    See Also:
    
    Constant Field Values
  - PORTAL_PARAMETER_VAADIN_THEME
```
static final String PORTAL_PARAMETER_VAADIN_THEME
```
    See Also:
    
    Constant Field Values
  - PORTLET_CONTEXT
```
static final String PORTLET_CONTEXT
```
    See Also:
    
    Constant Field Values

Interface Constants

Field Summary

Field Detail

NOT_PRODUCTION_MODE_INFO

WARNING_XSRF_PROTECTION_DISABLED

WARNING_RESOURCE_CACHING_TIME_NOT_NUMERIC

WARNING_HEARTBEAT_INTERVAL_NOT_NUMERIC

WARNING_PUSH_MODE_NOT_RECOGNIZED

WIDGETSET_MISMATCH_INFO

REQUIRED_ATMOSPHERE_RUNTIME_VERSION

REQUIRED_ATMOSPHERE_RUNTIME_JAKARTA_VERSION

INVALID_ATMOSPHERE_VERSION_WARNING

ATMOSPHERE_MISSING_ERROR

PUSH_NOT_SUPPORTED_ERROR

CANNOT_ACQUIRE_CLASSLOADER_SEVERE

URL_PARAMETER_THEME

SERVLET_PARAMETER_PRODUCTION_MODE

SERVLET_PARAMETER_DISABLE_XSRF_PROTECTION

SERVLET_PARAMETER_RESOURCE_CACHE_TIME

SERVLET_PARAMETER_HEARTBEAT_INTERVAL

SERVLET_PARAMETER_CLOSE_IDLE_SESSIONS

SERVLET_PARAMETER_PUSH_MODE

SERVLET_PARAMETER_UI_PROVIDER

SERVLET_PARAMETER_UI_PRIORITY

SERVLET_PARAMETER_SYNC_ID_CHECK

SERVLET_PARAMETER_SENDURLSASPARAMETERS

SERVLET_PARAMETER_PUSH_SUSPEND_TIMEOUT_LONGPOLLING

SERVLET_PARAMETER_LEGACY_DESIGN_PREFIX

PARAMETER_VAADIN_RESOURCES

DEFAULT_BUFFER_SIZE

MAX_BUFFER_SIZE

THEME_DIR_PATH

DEFAULT_THEME_CACHETIME

WIDGETSET_DIR_PATH

DEFAULT_WIDGETSET

PARAMETER_WIDGETSET

ERROR_NO_UI_FOUND

DEFAULT_THEME_NAME

INVALID_SECURITY_KEY_MSG

PORTAL_PARAMETER_VAADIN_WIDGETSET

PORTAL_PARAMETER_VAADIN_RESOURCE_PATH

PORTAL_PARAMETER_VAADIN_THEME

PORTLET_CONTEXT