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TimerExtension Add-on

A Vaadin add-on that enables component-based polling.

Do you need polling but only as long as a certain component is visible? If so, then the TimerExtension Add-on is the solution for you. Simply start the polling and then either stop the polling manually or just detach the component or a parent of it and the polling stops automatically. The extension is implemented using JavaScript, so no WidgetSet compilation is necessary.

Sample code

final TimerExtension timerExtension = new TimerExtension(extendedComponent);
timerExtension.setIntervalInMs(1000);  // polling interval in milliseconds
timerExtension.addTimerListener(e -> { /* handle polling event */ });
layout.addComponent(extendedComponent);

// ...

timerExtension.start();  // start the polling explicitly, it is stopped when the extended component is detached from the UI

Links

• Author Homepage
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• Source Code

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