File Binding

[jcoders]

Good Morning,

                     I have a project that i am working on that requires File polling, to poll for changes to a text file and read it in only if there are changes to it.I am using the switchyard version 1.1.1-p5-redhat-1.I created a file binding that does the polling but am unable to figure out how to pull in a file only if it has changed versus reading it each time.I saw a post on a camel site detailing the following to make this happen

from("file:/somedir?noop=true&idempotentKey=${file:name}-${file:size}")


Or

from("file:/somedir?noop=true&idempotentKey=${file:name}-${file:modified}")

source  - http://camel.apache.org/file2

I see options for noop and idempotent but none for idempotentKey -  so i tried setting this via the additional URI parameters tab and that fails the build itself with schema validation errors.Additionally also set the  idempotent flag to true, but no luck.I was hoping someone could help me out/point me in the right direction.

Regards

Rajat

[trohovsky]

Hi Rajat,

the version of SY you are using contains Camel 2.10.0. As the file component documentation says, the idempotentKey parameter is present since the version 2.11. Camel is upgraded to the version 2.12.2 in the 2.0 ([SWITCHYARD-1943] Upgrade Camel to 2.12.2 - JBoss Issue Tracker). See SwitchYard 2.0.0.Alpha2 Now Available for the details where to download 2.0 runtime/tooling.

Tomas

[jcoders]

Thank you for the prompt reply.So in the current version of sy that i have its not possible to read a file -  after the first read only if it has changed ?

[trohovsky]

Hy Rajat,

I am not a Camel expert, but you may workaround that by implementing your own idempotent repository. See vijayp's comment from Feb 11, 2010 in http://camel.465427.n5.nabble.com/Identifying-and-processing-changed-file-when-noop-true-td478672.html

Tomas