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47 lines
2.1 KiB
Markdown
47 lines
2.1 KiB
Markdown
# TransformerDebug
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In addition to any normal logging, the t-engines, t-router and t-client also
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use the `TransformerDebug` class to provide request based logging. The
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following is an example from Alfresco after the upload of a `docx` file.
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~~~text
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163 docx json AGM 2016 - Masters report.docx 14.8 KB -- metadataExtract -- TransformService
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163 workspace://SpacesStore/0db3a665-328d-4437-85ed-56b753cf19c8 1563306426
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163 docx json 14.8 KB -- metadataExtract -- PoiMetadataExtractor
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163 cm:title=
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163 cm:author=James Dobinson
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163 Finished in 664 ms
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...
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164 docx png AGM 2016 - Masters report.docx 14.8 KB -- doclib -- TransformService
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164 workspace://SpacesStore/0db3a665-328d-4437-85ed-56b753cf19c8 1563306426
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164 docx png 14.8 KB -- doclib -- officeToImageViaPdf
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164.1 docx pdf libreoffice
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164.2 pdf png pdfToImageViaPng
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164.2.1 pdf png pdfrenderer
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164.2.2 png png imagemagick
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164.2.2 endPage="0"
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164.2.2 resizeHeight="100"
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164.2.2 thumbnail="true"
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164.2.2 startPage="0"
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164.2.2 resizeWidth="100"
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164.2.2 autoOrient="true"
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164.2.2 allowEnlargement="false"
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164.2.2 maintainAspectRatio="true"
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164 Finished in 725 ms
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~~~
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This log happens to be from the t-client, but similar log lines exist in the
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t-router and individual t-engines.
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All lines start with a reference, which starts with the client’s request
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number (`163`, `164` if known) and then a nested pipeline or failover
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structure. The first request extracts metadata and the second creates a
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thumbnail rendition (called `doclib`). The second request is handled by a
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pipeline called `officeToImageViaPdf` which uses `libreoffice` to transform
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to `pdf` and then another pipeline to convert to `png`. The last step
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(`164.2.2`) in the process resizes the `png` using a number of transform
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options.
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If requested, log information is passed back in the TransformReply's
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clientData.
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