Vaadin 8 DataProvider

So, Grid uses DataProvider

May use this method, just provide two callbacks

public void setDataProvider(FetchItemsCallback<T> fetchItems,

            SerializableSupplier<Integer> sizeCallback) {

And follow these samples and articles:

https://vaadin.com/blog/lazy-loading-with-vaadin-8

https://github.com/mstahv/jpa-helper-libraries

https://jaxenter.com/top-3-jpa-productivity-boosters-for-java-ee-developers-querydsl-116135.html

https://jaxenter.com/top-3-jpa-productivity-boosters-for-java-ee-developers-deltaspike-data-116136.html

https://jaxenter.com/top-3-jpa-productivity-boosters-for-java-ee-developers-spring-data-116126.html