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Custom Transformer Parameters

When you open a custom transformer, a Transformer Parameters node appears in the Workbench Navigator. This node contains parameters that are common to all custom transformers.

Parameter Description
Password If a custom transformer is exported, it can be password-protected.
Transformer Insert Mode Determines how the transformer is referenced in workspaces. May depend on whether the transformer is exported or not.
Deprecated If Yes, the transformer is no longer available for use in newly-created workspaces. It remains usable only in existing workspaces.
Check for missing attribute references If Yes, the transformer returns a warning if an attribute is not present on the features entering the transformer. See Check for Missing Attribute References.
Enable Blocked Looping

If Yes, the transformer can bypass its blocking behavior when used in a loop, and the following additional parameters apply:

  • Maximum number of iterations
  • Atttribute to hold iteration count

For more information, see Looping with a Blocking Transformer.
Parallel Processing Level

Specifies the number of threads the custom transformer can process in parallel.

Level Number of Processes
No Parallelism 1
Minimal Cores / 2
Moderate Exact number of cores
Aggressive Cores * 1.5
Extreme Cores * 2

For more information, see "About Parallel Processing" in the FME Transformers Help.
Parallel Process By Specifies an attribute or parameter by which to group parallel processing threads. For example, if the attribute 'STATE' is specified, the transformer processes each state in parallel.
Parallel Process Groups are Ordered If Yes, the FME engine can assume that data is inputted to the custom transformer in order for each 'Parallel Process By' parameter value. This setting provides a performance and memory boost, because the engine does not need to wait for all features to arrive before beginning a process. Set this value to Yes only if the structure of your dataset allows for data throughput in order by the 'Parallel Process By' setting.