org.cloudfoundry.util

Class OperationUtils

java.lang.Object

org.cloudfoundry.util.OperationUtils

public final class OperationUtils
extends Object

Utilities with operations that do not (yet) exist

Method Summary

Modifier and Type	Method and Description
static <IN extends OUT,OUT> Function<IN,OUT>	cast() Casts an item from one type to another
static Mono<byte[]>	collectByteArray(Flux<byte[]> bytes) Operation to collect a Flux<byte[]> into a contiguous single byte array, delivered as a single element of a Mono<byte[]>.
static <T,U> Function<Mono<T>,Mono<T>>	thenKeep(Function<T,Mono<U>> thenFunction) Produces a Mono transformer that preserves the type of the source Mono<IN>.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

cast

public static <IN extends OUT,OUT> Function<IN,OUT> cast()

Casts an item from one type to another

Type Parameters:

IN - the source type

OUT - the target type

Returns:

the same instance

collectByteArray

public static Mono<byte[]> collectByteArray(Flux<byte[]> bytes)

Operation to collect a Flux<byte[]> into a contiguous single byte array, delivered as a single element of a Mono<byte[]>.

Parameters:

bytes - a Flux of 0 or more byte arrays

Returns:

a Mono of a byte array

thenKeep

public static <T,U> Function<Mono<T>,Mono<T>> thenKeep(Function<T,Mono<U>> thenFunction)

Produces a Mono transformer that preserves the type of the source Mono<IN>.

The Mono produced expects a single element from the source, passes this to the function (as in .then) and requests an element from the resulting Mono<OUT>. When successful, the result (if any) is discarded and the input value is signalled.

Summary: does a .then on the new Mono but keeps the input to pass on unchanged.

Usage: Can be used inline thus: .as(thenKeep(in -> funcOf(in)))

Type Parameters:

T - the source element type

U - the element type of the Mono produced by thenFunction

Parameters:

thenFunction - from source input element to some Mono<OUT>

Returns:

a Mono transformer