CmsValidationScheduler (OpenCms GWT Components API, version 17.0)

java.lang.Object
- org.opencms.gwt.client.validation.CmsValidationScheduler

```
public class CmsValidationScheduler
extends java.lang.Object
```
This is a helper class for scheduling form validations.
Since validations can be asynchronous, it would be possible for a validation to start while another one is still waiting for a response from the server if it were ran directly. This might result in an inconsistent state of the form fields being validated. To prevent this, validation controllers use this class to schedule validations, and call this class again after they're finished to execute the next validation.
The result of this is that a validation will only start after all unfinished validations which have been scheduled before it have finished running.

Since:

8.0.0

Constructor Summary

Constructors
Modifier Constructor Description

protected CmsValidationScheduler()
Hidden default constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`executeNext()`	This method should be called by the validation controller when it has finished running.
`static CmsValidationScheduler`	`get()`	Returns the singleton instance of the validation scheduler.
`void`	`schedule(CmsValidationController action)`	This schedules a new validation to be run after all currently scheduled or running validations have finished.

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

- Constructor Detail
  - CmsValidationScheduler
```
protected CmsValidationScheduler()
```
    Hidden default constructor.
- Method Detail
  - get
```
public static CmsValidationScheduler get()
```
    Returns the singleton instance of the validation scheduler.
    
    Returns:
    
    the validation scheduler
  - executeNext
```
public void executeNext()
```
    This method should be called by the validation controller when it has finished running.
    It will execute the next validation if there is one.
  - schedule
```
public void schedule(CmsValidationController action)
```
    This schedules a new validation to be run after all currently scheduled or running validations have finished.
    If there are no validations running, the validation will be started immediately.
    
    Parameters:
    
    action - the validation to be scheduled