7487dc8f61
Prior to this commit, each app documented its available config props in its README.adoc. Now that the functions have been moved to the function catalog, these inline docs are replaced w/ a link to the respective function catalog docs. See #524
82 lines
2.6 KiB
Plaintext
82 lines
2.6 KiB
Plaintext
//tag::ref-doc[]
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= FTP Source
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This source application supports transfer of files using the FTP protocol.
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Files are transferred from the `remote` directory to the `local` directory where the app is deployed.
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Messages emitted by the source are provided as a byte array by default. However, this can be
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customized using the `--mode` option:
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- *ref* Provides a `java.io.File` reference
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- *lines* Will split files line-by-line and emit a new message for each line
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- *contents* The default. Provides the contents of a file as a byte array
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When using `--mode=lines`, you can also provide the additional option `--withMarkers=true`.
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If set to `true`, the underlying `FileSplitter` will emit additional _start-of-file_ and _end-of-file_ marker messages before and after the actual data.
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The payload of these 2 additional marker messages is of type `FileSplitter.FileMarker`. The option `withMarkers` defaults to `false` if not explicitly set.
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See also link:../../../functions/common/metadata-store-common/README.adoc[MetadataStore] options for possible shared persistent store configuration used to prevent duplicate messages on restart.
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== Input
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N/A (Fetches files from an FTP server).
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== Output
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=== mode = contents
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==== Headers:
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* `Content-Type: application/octet-stream`
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* `file_originalFile: <java.io.File>`
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* `file_name: <file name>`
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==== Payload:
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A `byte[]` filled with the file contents.
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=== mode = lines
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==== Headers:
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* `Content-Type: text/plain`
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* `file_orginalFile: <java.io.File>`
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* `file_name: <file name>`
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* `correlationId: <UUID>` (same for each line)
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* `sequenceNumber: <n>`
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* `sequenceSize: 0` (number of lines is not know until the file is read)
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==== Payload:
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A `String` for each line.
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The first line is optionally preceded by a message with a `START` marker payload.
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The last line is optionally followed by a message with an `END` marker payload.
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Marker presence and format are determined by the `with-markers` and `markers-json` properties.
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=== mode = ref
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==== Headers:
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None.
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==== Payload:
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A `java.io.File` object.
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== Options
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The **$$ftp$$** $$source$$ has the following options:
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//tag::configuration-properties[link-to-catalog=true]
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https://github.com/spring-cloud/spring-functions-catalog/tree/main/supplier/spring-ftp-supplier#configuration-options[See Spring Functions Catalog for configuration options].
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//end::configuration-properties[]
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== Examples
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[source,shell]
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----
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java -jar ftp_source.jar --ftp.supplier.remote-dir=foo --file.consumer.mode=lines --ftp.factory.host=ftpserver \
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--ftp.factory.username=user --ftp.factory.password=pw --ftp.local-dir=/foo
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----
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//end::ref-doc[]
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