Package com.vaadin.observability.micrometer

Class ClientResourceLoader

java.lang.Object

com.vaadin.observability.micrometer.ClientResourceLoader

public final class ClientResourceLoader
extends Object

Loads a bundled client-side JavaScript resource into a UI exactly once. The classpath resource is read, stripped of comments and executed via Page.executeJs(java.lang.String, java.lang.Object...). A per-UI flag keyed by initKey guards against repeated injection.

Method Summary

Modifier and Type	Method	Description
static void	loadOnce(com.vaadin.flow.component.UI ui, String initKey, String resource, Class<?> owner)	Injects resource into ui once.
static void	loadOnce(com.vaadin.flow.component.UI ui, String initKey, String resource, Class<?> owner, String prelude)	Injects resource into ui once, preceded by prelude in the same script.

Methods inherited from class java.lang.Object

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

Method Details

loadOnce

public static void loadOnce(com.vaadin.flow.component.UI ui,
 String initKey,
 String resource,
 Class<?> owner)

Injects resource into ui once. Subsequent calls with the same initKey for the same UI are no-ops. Missing resources or read failures are logged against owner and otherwise ignored.

Parameters:

ui - the target UI; null is ignored

initKey - the per-UI data key used to ensure single injection

resource - the classpath resource path of the JavaScript to load

owner - the class whose class loader and logger are used

loadOnce

public static void loadOnce(com.vaadin.flow.component.UI ui,
 String initKey,
 String resource,
 Class<?> owner,
 String prelude)

Injects resource into ui once, preceded by prelude in the same script.

Parameters:

ui - the target UI; null is ignored

initKey - the per-UI data key used to ensure single injection

resource - the classpath resource path of the JavaScript to load

owner - the class whose class loader and logger are used

prelude - JavaScript run immediately before the resource, or null for none. The way to hand the script a server-side decision it cannot read for itself; it is executed as written, so it must be server-authored and must carry no comments, which are stripped from the resource but not from this