CODEWITHSUNDEEP
javaspringspring-bootspring-integration
FiguringThisOut
FiguringThisOut

Reputation: 910

How to have Spring Integration FTP Message Source produce Message<String> straight to channel, not creating a File

Is it possible to read a file from an FTP message source and send it straight to a channel as a Message<String> with the file contents as the message payload and the filename in a header? How would I do this?

Right now, it is writing the file from the FTP source to disk, which I don't want it to do. I'd then have to read off of the disk and then convert it into a message or write a file source of some sort. I want it to go straight from the FTP source directly into the channel as a Message<String>.

To explain the situation, I am having multiple FTP sources all polling into a channel as one flow. I am then wanting all messages in that channel to go to a JdbcOutboundGateway to write the messages to a DB table in another flow. However, when it gets into the channel from the FTP source, the message payload ends up just being the file path. I want the FTP message source to not create a file, just a Message<String> and place into the channel.

Upvotes: 2

Views: 801

Answers (1)

Ruslan Stelmachenko
Ruslan Stelmachenko

Reputation: 5420

Did you check FTP Streaming Inbound Channel Adapter documentation?

The streaming inbound channel adapter was introduced in version 4.3. This adapter produces message with payloads of type InputStream, allowing files to be fetched without writing to the local file system.

I think this is exactly what you want. You end up with Message<InputStream> in your channel, but you always can transform these into Message<String> using message transformers, like StreamTransformer.

Upvotes: 3

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