Package com.vaadin.flow.component.trigger.internal

Class ServerCallbackAction

java.lang.Object

com.vaadin.flow.component.trigger.AbstractAction

com.vaadin.flow.component.trigger.internal.ServerCallbackAction

All Implemented Interfaces:

Action, Serializable

public final class ServerCallbackAction
extends AbstractAction

Action that runs a server-side SerializableRunnable when its trigger fires. Used by Trigger.triggers(SerializableRunnable).

On the client, the flow:server-callback factory's run() simply notifies the server via the per-host return channel; the server's TriggerSupport.dispatchMirror then invokes applyServerSideEffect() which calls the wrapped runnable on the UI thread.

For internal use only.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TYPE_ID

Constructor Summary

Constructors

Constructor	Description
ServerCallbackAction(SerializableRunnable handler)

Method Summary

Modifier and Type	Method	Description
void	applyServerSideEffect()	Mirrors the client-side effect on the server.
SerializableRunnable	getHandler()

Methods inherited from class com.vaadin.flow.component.trigger.AbstractAction

buildClientConfig, getTypeId

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

TYPE_ID

public static final String TYPE_ID

See Also:

• Constant Field Values

Constructor Details

ServerCallbackAction

public ServerCallbackAction(SerializableRunnable handler)

Parameters:

handler - the server-side handler, not null

Method Details

getHandler

public SerializableRunnable getHandler()

Returns:

the wrapped handler

applyServerSideEffect

public void applyServerSideEffect()

Description copied from class: AbstractAction

Mirrors the client-side effect on the server. Called on the UI thread, at the start of the same server cycle that processes the triggering DOM event, before any user-attached event listeners run, so that listener code observes the post-action state.

Default is a no-op. Subclasses with a server-observable effect (e.g. SetEnabledAction) override this.

Overrides:

applyServerSideEffect in class AbstractAction