rickyma commented on PR #1819:
URL:
https://github.com/apache/incubator-uniffle/pull/1819#issuecomment-2185834179
Maybe we can just use pure Java codes, something like:
```
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Supplier;
public class FunctionUtils {
public static <T> Supplier<T> once(Supplier<T> supplier) {
return new Supplier<T>() {
private final AtomicBoolean computed = new AtomicBoolean(false);
private T value;
@Override
public T get() {
if (computed.compareAndSet(false, true)) {
value = supplier.get();
}
return value;
}
};
}
public static void main(String[] args) {
Supplier<String> supplier = () -> {
System.out.println("Called only once");
return "Hello, World!";
};
Supplier<String> memoizedSupplier = once(supplier);
System.out.println(memoizedSupplier.get());
System.out.println(memoizedSupplier.get());
System.out.println(memoizedSupplier.get());
}
}
```
Then we can avoid the Scala compatibility issue. WDYT?
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