Claus Skou Nielsen created CAMEL-14533:
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Summary: camel-ftp: fileExist=Append and tempPrefix options do not
work together
Key: CAMEL-14533
URL: https://issues.apache.org/jira/browse/CAMEL-14533
Project: Camel
Issue Type: Bug
Components: camel-ftp
Affects Versions: 3.0.1, 2.24.2, 2.22.2
Reporter: Claus Skou Nielsen
If you both have fileExist=Append and tempPrefix=<something> options on a sftp
to-endpoint, the de facto behaviour of the route is as if it was configured
with fileExist=Override.
When you think about how fileExist and tempPrefix works, this bug actually
makes sense. The temporary prefix makes it so that a "new" file is written
every time, and therefore fileExist=Append is just working like it does when
there isn't an existing file to append to.
I think there are a couple of possible solutions to this problem:
* Document this behaviour in the camel documentation, and let the user be
responsible for knowing that these two options are incompatible
* Throw an exception when building the route if these two mutually exclusive
options are used on the same route
* Make fileExist=Append and tempPrefix=<something> be compatible, by making
the 'mv' operation after writing the temporary file merge the two files,
instead of replacing it
* Some other brilliant solution that the camel maintainers will see, that has
escaped me
*Recreate the issue*
Define and start up the following route:
```
from("timer://loltimer?delay=5000&period=5000")
.setHeader("CamelFileName", constant("foo.txt"))
.setBody(constant("Davs"))
.to("sftp://mysftpserver:22/fileappendtest?username=myusername&password=mypassword&fileExist=Append&tempPrefix=.uploading";);
```
Then you can observe the folder on the sftp-server, and see that the file size
never increases, but the files Last-Modified timestamp gets renewed every five
seconds.
If you remove the "tempPrefix=.uploading" option from the sftp uri it works
like it should, and the file size increases every 5 seconds.
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