java.lang.Object
- com.vaadin.flow.server.SystemMessages
- - com.vaadin.flow.server.CustomizedSystemMessages

All Implemented Interfaces:

Serializable
```
public class CustomizedSystemMessages
extends SystemMessages
```
Contains the system messages used to notify the user about various critical situations that can occur.
Vaadin gets the SystemMessages from your application by calling a static getSystemMessages() method. By default the Application.getSystemMessages() is used. You can customize this by defining a static MyApplication.getSystemMessages() and returning CustomizedSystemMessages. Note that getSystemMessages() is static - changing the system messages will by default change the message for all users of the application.
The default behavior is to show a notification, and restart the application the user clicks the message.
Instead of restarting the application, you can set a specific URL that the user is taken to.
Setting both caption and message to null will restart the application (or go to the specified URL) without displaying a notification. set*NotificationEnabled(false) will achieve the same thing.
The situations are:
- Session expired: the user session has expired, usually due to inactivity.
- Communication error: the client failed to contact the server, or the server returned an invalid response.
- Internal error: unhandled critical server error (e.g out of memory, database crash)
Since:

1.0

See Also:

Serialized Form

Field Summary
- Fields inherited from class com.vaadin.flow.server.SystemMessages
  cookiesDisabledCaption, cookiesDisabledMessage, cookiesDisabledNotificationEnabled, cookiesDisabledURL, internalErrorCaption, internalErrorMessage, internalErrorNotificationEnabled, internalErrorURL, sessionExpiredCaption, sessionExpiredMessage, sessionExpiredNotificationEnabled, sessionExpiredURL

Constructor Summary

Constructors
Constructor Description

CustomizedSystemMessages()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`setCookiesDisabledCaption(String cookiesDisabledCaption)`	Sets the caption to show in an "cookies disabled" notification.
`void`	`setCookiesDisabledMessage(String cookiesDisabledMessage)`	Sets the message to show in a "cookies disabled" notification.
`void`	`setCookiesDisabledNotificationEnabled(boolean cookiesDisabledNotificationEnabled)`	Sets whether a "cookies disabled" notification should be shown to the end user.
`void`	`setCookiesDisabledURL(String cookiesDisabledURL)`	Sets the URL the user will be redirected to after dismissing a "cookies disabled" message.
`void`	`setInternalErrorCaption(String internalErrorCaption)`	Sets the caption to show in an "internal error" notification.
`void`	`setInternalErrorMessage(String internalErrorMessage)`	Sets the message to show in an "internal error" notification.
`void`	`setInternalErrorNotificationEnabled(boolean internalErrorNotificationEnabled)`	Sets whether an "internal error" notification should be shown to the end user.
`void`	`setInternalErrorURL(String internalErrorURL)`	Sets the URL the user will be redirected to after dismissing an "internal error" message.
`void`	`setSessionExpiredCaption(String sessionExpiredCaption)`	Sets the caption to show in a "session expired" notification.
`void`	`setSessionExpiredMessage(String sessionExpiredMessage)`	Sets the message to show in a "session expired" notification.
`void`	`setSessionExpiredNotificationEnabled(boolean sessionExpiredNotificationEnabled)`	Sets whether a "session expired" notification should be shown to the end user.
`void`	`setSessionExpiredURL(String sessionExpiredURL)`	Sets the URL the user will be redirected to after dismissing a "session expired" message.

Methods inherited from class com.vaadin.flow.server.SystemMessages
getCookiesDisabledCaption, getCookiesDisabledMessage, getCookiesDisabledURL, getInternalErrorCaption, getInternalErrorMessage, getInternalErrorURL, getSessionExpiredCaption, getSessionExpiredMessage, getSessionExpiredURL, isCookiesDisabledNotificationEnabled, isInternalErrorNotificationEnabled, isSessionExpiredNotificationEnabled

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

- Constructor Detail
  - CustomizedSystemMessages
```
public CustomizedSystemMessages()
```
- Method Detail
  - setSessionExpiredURL
```
public void setSessionExpiredURL(String sessionExpiredURL)
```
    Sets the URL the user will be redirected to after dismissing a "session expired" message.
    
    Parameters:
    
    sessionExpiredURL - the URL to redirect to, or null to refresh the page
  - setSessionExpiredNotificationEnabled
```
public void setSessionExpiredNotificationEnabled(boolean sessionExpiredNotificationEnabled)
```
    Sets whether a "session expired" notification should be shown to the end user. If the notification is disabled the user will be immediately redirected to the URL returned by SystemMessages.getSessionExpiredURL().
    
    Parameters:
    
    sessionExpiredNotificationEnabled - true to show the notification to the end user, false to redirect directly
  - setSessionExpiredCaption
```
public void setSessionExpiredCaption(String sessionExpiredCaption)
```
    Sets the caption to show in a "session expired" notification.
    If both SystemMessages.getSessionExpiredCaption() and SystemMessages.getSessionExpiredMessage() return null, the user will automatically be forwarded to the URL returned by SystemMessages.getSessionExpiredURL() when the session expires.
    
    Parameters:
    
    sessionExpiredCaption - The caption to show or null to show no caption.
  - setSessionExpiredMessage
```
public void setSessionExpiredMessage(String sessionExpiredMessage)
```
    Sets the message to show in a "session expired" notification.
    If both SystemMessages.getSessionExpiredCaption() and SystemMessages.getSessionExpiredMessage() return null, the user will automatically be forwarded to the URL returned by SystemMessages.getSessionExpiredURL() when the session expires.
    
    Parameters:
    
    sessionExpiredMessage - The message to show or null to show no message.
  - setInternalErrorURL
```
public void setInternalErrorURL(String internalErrorURL)
```
    Sets the URL the user will be redirected to after dismissing an "internal error" message.
    
    Parameters:
    
    internalErrorURL - the URL to redirect to, or null to refresh the page
  - setInternalErrorNotificationEnabled
```
public void setInternalErrorNotificationEnabled(boolean internalErrorNotificationEnabled)
```
    Sets whether an "internal error" notification should be shown to the end user. If the notification is disabled the user will be immediately redirected to the URL returned by SystemMessages.getInternalErrorURL().
    
    Parameters:
    
    internalErrorNotificationEnabled - true to show the notification to the end user, false to redirect directly
  - setInternalErrorCaption
```
public void setInternalErrorCaption(String internalErrorCaption)
```
    Sets the caption to show in an "internal error" notification.
    
    Parameters:
    
    internalErrorCaption - The caption to show or null to show no caption.
  - setInternalErrorMessage
```
public void setInternalErrorMessage(String internalErrorMessage)
```
    Sets the message to show in an "internal error" notification.
    
    Parameters:
    
    internalErrorMessage - The message to show or null to show no message.
  - setCookiesDisabledURL
```
public void setCookiesDisabledURL(String cookiesDisabledURL)
```
    Sets the URL the user will be redirected to after dismissing a "cookies disabled" message.
    
    Parameters:
    
    cookiesDisabledURL - the URL to redirect to, or null to refresh the page
  - setCookiesDisabledNotificationEnabled
```
public void setCookiesDisabledNotificationEnabled(boolean cookiesDisabledNotificationEnabled)
```
    Sets whether a "cookies disabled" notification should be shown to the end user. If the notification is disabled the user will be immediately redirected to the URL returned by SystemMessages.getCookiesDisabledURL().
    
    Parameters:
    
    cookiesDisabledNotificationEnabled - true to show the notification to the end user, false to redirect directly
  - setCookiesDisabledCaption
```
public void setCookiesDisabledCaption(String cookiesDisabledCaption)
```
    Sets the caption to show in an "cookies disabled" notification.
    
    Parameters:
    
    cookiesDisabledCaption - The caption to show or null to show no caption.
  - setCookiesDisabledMessage
```
public void setCookiesDisabledMessage(String cookiesDisabledMessage)
```
    Sets the message to show in a "cookies disabled" notification.
    
    Parameters:
    
    cookiesDisabledMessage - The message to show or null to show no message.

Class CustomizedSystemMessages

Field Summary

Fields inherited from class com.vaadin.flow.server.SystemMessages

Constructor Summary

Method Summary

Methods inherited from class com.vaadin.flow.server.SystemMessages

Methods inherited from class java.lang.Object

Constructor Detail

CustomizedSystemMessages

Method Detail

setSessionExpiredURL

setSessionExpiredNotificationEnabled

setSessionExpiredCaption

setSessionExpiredMessage

setInternalErrorURL

setInternalErrorNotificationEnabled

setInternalErrorCaption

setInternalErrorMessage

setCookiesDisabledURL

setCookiesDisabledNotificationEnabled

setCookiesDisabledCaption

setCookiesDisabledMessage