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Stream typesTransformations
Stream type Iterable<R> → R

FlatMapIterable

Unwraps an iterable stream without a generated function.

When to use

Use this structural operator when the source already produces an iterable container.

Behavior

  • Emits each item separately.
  • Does not own user business logic.

General properties

Identity, ownership and operator-specific mode.

PropertyTypeDescription
typeTransformationType

Operator kind. It controls available properties, valid sources and generated interfaces.

RequiredAllowed: Input, Map, Filter, Join, MultiJoin, Process, FlatMap, FlatMapIterable, KeyBy, Merge, Split, Case, Sink, CycleLink, Error, Delay, When
namestring

Human-readable stream name shown in the designer and used to derive default generated symbols.

Required
serviceService

Service that owns the stream. Connected streams must belong to the same service.

Required

Connections properties

Upstream graph references accepted by this operator.

PropertyTypeDescription
sourceStream

Single upstream stream. The designer only offers structurally and type-compatible candidates.

Required

Data Types properties

Message contracts visible at this node.

PropertyTypeDescription
valueTypeType

Output or response message contract. The exact meaning is operator-specific.

RequiredDefault: UnknownType

Execution properties

Pipeline placement and runtime policy.

PropertyTypeDescription
pipelinestring

Visual and configuration grouping inside the owning service.

Position properties

Designer-only canvas coordinates.

PropertyTypeDescription
xPosnumber

Horizontal designer coordinate. It has no runtime effect.

Required
yPosnumber

Vertical designer coordinate. It has no runtime effect.

Required

Configuration example

type: FlatMapIterable
source: orderBatch
valueType: Order