Logs each feature to the translation log at the specified severity. All attributes and geometry of the feature will be output.
Limits can be placed on both the number of features that will be logged, and the number of coordinates that will be logged per feature.
Input Ports
Input
Features to be logged.
Output Ports
Logged
All logged Input features are output to this port unchanged.
Parameters
Max Messages To Log
The maximum times for this logger to log features or messages.
Note: The Workbench parameter Max Features to Log takes precedence over this transformer parameter.
Severity Level
The level the feature and message should appear in the log. The Log window shows Information as black, Warning as blue and Error as red.
The setting indicates the logging level only and does not affect execution. Thus, if Error is chosen, even though the message is logged as ‘error’, the translation will not stop.
Feature Logging
Whether or not to log features with the message and whether or not to record.
If Log Only is selected, the message and feature will be logged to the log only.
If Log and Record is selected, in addition to being logged, the feature will also be recorded in an FFS file. The log message and severity will appear as an attribute on the feature. The FFS file will be located in the same directory as the log and named <workspacename>_log.ffs.
If Message Only is selected, the log message will be logged but not the feature.
Max Coordinates Per Feature
If logging features, this parameter specifies the number of coordinates to be logged. If a feature has more than the maximum allowed coordinates, then only a set of coordinates at the beginning and end of the feature will be logged.
If you enter -1, all coordinates will be logged. If any other value is specified, only the first <maxCoords> coordinates will be logged.
Feature Type Override
The Feature Type Override text will set the feature type of the feature just prior to it being logged. This setting is most useful to control the feature type of the features in the recorded FFS file.
If this parameter is left blank, the feature type is constructed from the transformer's name and output port. This can be useful to determine the origin of features when there are multiple Loggers in a workspace.
Log Message
If present, a message that is logged before each feature is logged.
Usage Notes
- An alternate way to see the attributes and geometries of features is to route them into an Inspector transformer, which will display them in the FME Data Inspector.
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- Null values will be logged as "is <null>", whereas strings whose content is "<null>" will be logged as "has value '<null>'".
- To quickly attach Logger transformers: right-click on one or more selected reader feature types and choose Connect Loggers.
Editing Transformer Parameters
Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click 
beside the applicable parameter. For more information, see Transformer Parameter Menu Options.
Transformer Categories
Technical History
Associated FME function or factory: @Log
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