Interface ReactiveFindOperation.TerminatingResults<T>

All Known Subinterfaces:

ReactiveFindOperation.FindWithCollection<T>, ReactiveFindOperation.FindWithProjection<T>, ReactiveFindOperation.FindWithQuery<T>, ReactiveFindOperation.ReactiveFind<T>, ReactiveFindOperation.TerminatingFind<T>

Enclosing interface:

ReactiveFindOperation

public static interface ReactiveFindOperation.TerminatingResults<T>

Compose find execution by calling one of the terminating methods.

Since:

5.0

Author:

Mark Paluch, Christoph Strobl, Juergen Zimmermann

Method Summary

Modifier and Type	Method	Description
Flux<T>	all()	Get all matching elements.
Mono<T>	first()	Get the first or no result.
<R> ReactiveFindOperation.TerminatingResults<R>	map(QueryResultConverter<? super T, ? extends R> converter)	Map the query result to a different type using QueryResultConverter.
Mono<T>	one()	Get exactly zero or one result.
Mono<Window<T>>	scroll(ScrollPosition scrollPosition)	Return a scroll of elements either starting or resuming at ScrollPosition.
Flux<T>	tail()	Get all matching elements using a tailable cursor.

Method Details

map

@Contract("_ -> new")
<R> ReactiveFindOperation.TerminatingResults<R> map(QueryResultConverter<? super T, ? extends R> converter)

Map the query result to a different type using QueryResultConverter.

Type Parameters:

R - type of the result.

Parameters:

converter - the converter, must not be null.

Returns:

new instance of ReactiveFindOperation.TerminatingResults.

Throws:

IllegalArgumentException - if converter is null.

Since:

5.0

one

Mono<T> one()

Get exactly zero or one result.

Returns:

Mono.empty() if no match found. Never null.

Throws:

IncorrectResultSizeDataAccessException - if more than one match found.

first

Mono<T> first()

Get the first or no result.

Returns:

Mono.empty() if no match found. Never null.

all

Flux<T> all()

Get all matching elements.

Returns:

never null.

scroll

Mono<Window<T>> scroll(ScrollPosition scrollPosition)

Return a scroll of elements either starting or resuming at ScrollPosition.

When using KeysetScrollPosition, make sure to use non-nullable sort properties as MongoDB does not support criteria to reconstruct a query result from absent document fields or null values through $gt/$lt operators.

Parameters:

scrollPosition - the scroll position.

Returns:

a scroll of the resulting elements.

Since:

4.1

See Also:

• OffsetScrollPosition
• KeysetScrollPosition

tail

Flux<T> tail()

Get all matching elements using a tailable cursor. The stream will not be completed unless the Subscription is canceled.
However, the stream may become dead, or invalid, if either the query returns no match or the cursor returns the document at the "end" of the collection and then the application deletes that document.
A stream that is no longer in use must be Disposable.dispose() disposed} otherwise the streams will linger and exhaust resources.
NOTE: Requires a capped collection.

Returns:

the Flux emitting converted objects.

Since:

2.1