Filter

Filter passes records which satisfies its condition. It can have one or two outputs. First output is for records satisfying the condition, second (optional) is for others. filter graph

Records from the source which meet filter's condition go to the true sink, and others go to the false sink.

filter graph single

Records from the source which meets condition go to the blue sink, and others are filtered out.

Parameters

filter window There are two parameters: Expression, and Disabled.

Expression is written in SpEL and it is evaluated for each record to logical value. Outgoing data flow depends on expression result.

When the node is Disabled, expression isn't evaluated, and always returns true.

Flow

Filter has one input and one or two outputs.

If there is one output, only outgoing pipe is named true, and each record which expression evaluates to true passes. Otherwise record is gone.

If there are two outputs, one pipe is named true and another false. Each record which expression evaluates to true goes to true pipe, and other record goes to false pipe.

Split

Each output receives all records and processes them independently.

split graph

Every record from the source gos to sink 1 and sink 2.

Parameters

Split doesn't have additional parameters.

split window

Flow

Split has one or more outputs. Outputs have the same record as input, so all outputs are identical.

Switch

Distributes incoming records between outputs.

switch graph

Each record form the source is tested against condition defined on the edge. If color is blue record goes to the blue sink. If color is green record goes to the green sink. For every other value record goes to the sink for others.

Parameters

switch window

There are two parameters Expression and exprVal. Expression contains expression which is evaluated for each record, and evaluated value is assigned to variable named in exprVal.

Edges outgoing from Switch node can be of one of two types.

switch_edge_condition

Edge of the Condition type has an Expression. Record go to the first output with matching condition. Order of matching outgoing edges is not guaranteed.

switch_edge_default

There can be at most one edge of type Default, and it gets all records that don't match any Condition edge.

Flow

For each incoming record Expression is evaluated and result is assigned to exprVal variable. After that, records are tested against condition Expressions from output edges one by one. Record goes to first output which condition it satisfies. If record doesn't match any conditional output, and default output exists, record goes to default output. Otherwise mismatching record is filtered out.

Variable

Evaluates Expression, and assigns to Variable Name.

variable graph

Parameters

variable_window

Flow

Doesn't change records flow. Have to have exactly one output. Variable once defined cannot be overwritten.

Map Variable

Defines a new variable with one or more fields. Each field value is evaluated by using Expression.

Parameters

map_variable_window

Flow

Doesn't change records flow. Once defined value of this type cannot be overwritten.

Sql Variable

Evaluates sql Expression, and assigns to Variable Name.

Parameters

sql_variable_window

Flow

Doesn't change records flow. Have to have exactly one output. Variable once defined cannot be overwritten.

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