/** Setup renderer hints. */
public static void init() {
if (initialized.getAndSet(true)) return;
final Function<Double, Long> longValue =
new Function<Double, Long>() {
@Override
public Long apply(@Nullable Double input) {
if (input == null) return null;
return input.longValue();
}
};
RendererHints.register(UPTIME, RendererHints.displayValue(Time.toTimeStringRounded()));
RendererHints.register(CPU_USAGE, RendererHints.displayValue(MathFunctions.percent(2)));
RendererHints.register(AVERAGE_CPU_USAGE, RendererHints.displayValue(MathFunctions.percent(2)));
RendererHints.register(
FREE_MEMORY,
RendererHints.displayValue(
Functionals.chain(MathFunctions.times(1000L), ByteSizeStrings.metric())));
RendererHints.register(
TOTAL_MEMORY,
RendererHints.displayValue(
Functionals.chain(MathFunctions.times(1000L), ByteSizeStrings.metric())));
RendererHints.register(
USED_MEMORY,
RendererHints.displayValue(
Functionals.chain(MathFunctions.times(1000L), ByteSizeStrings.metric())));
RendererHints.register(
USED_MEMORY_DELTA_PER_SECOND_LAST,
RendererHints.displayValue(Functionals.chain(longValue, ByteSizeStrings.metric())));
RendererHints.register(
USED_MEMORY_DELTA_PER_SECOND_IN_WINDOW,
RendererHints.displayValue(Functionals.chain(longValue, ByteSizeStrings.metric())));
}
/**
* Supplies the value to be returned by each poll.
*
* <p>Note this <em>must</em> use generics, otherwise the return type of subsequent chained calls
* will (e.g. to {@link FeedConfig#onException(com.google.common.base.Function)} will return the
* wrong type.
*/
@SuppressWarnings("unchecked")
public <newS> FunctionPollConfig<newS, T> supplier(final Supplier<? extends newS> val) {
this.callable = Functionals.callable(checkNotNull(val, "supplier"));
return (FunctionPollConfig<newS, T>) this;
}