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Complete push example

This commit is contained in:
Marcus Hellberg 2024-03-07 14:07:25 -08:00
parent fcccce33e8
commit 0e34a27d24
1 changed files with 12 additions and 7 deletions
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19
vaadin/src/main/java/com/baeldung/introduction/PushView.java
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@ -1,6 +1,5 @@
package com.baeldung.introduction;
import com.vaadin.flow.component.html.H1;
import com.vaadin.flow.component.html.Span;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;
@ -16,12 +15,18 @@ public class PushView extends VerticalLayout {
public PushView() {
var output = new Span();
add(new H1("Server Push"), output);
// Publish server time once a second
var serverTime = Flux.interval(Duration.ofSeconds(1))
.map(o -> "Server time: " + Instant.now());
Flux.interval(Duration.ofSeconds(1))
.map(o -> "Server time: " + Instant.now())
.subscribe(time -> getUI().ifPresent(ui -> ui.access(() -> {
output.setText(time);
})));
serverTime.subscribe(time ->
// ui.access is required to update the UI from a background thread
getUI().ifPresent(ui ->
ui.access(() -> output.setText(time))
)
);
add(output);
}
}