Extend FileExistsMode with RENAME mode [INT-4475]

[spring-operator]

Martins M opened INT-4475 and commented

Currently classes that make use of org.springframework.integration.file.support.FileExistsMode does not have an option to rename the new file if one already exists. The simplest renaming implementation could just add to a filename a suffix consisting of a current timestamp in millis.

Yes, this functionality can be achieved in other ways (e.g. via advice) however having inbuilt RENAME mode would make it more concise and readable.

Obviously all the handler classes would have to be updated to handle the new mode.

Is there a specific reason why this haven't been implemented (e.g. considered not needed)?

 

---

No further details from INT-4475

[spring-operator]

Gary Russell commented

Is there a specific reason why this haven't been implemented (e.g. considered not needed)?

It's never been asked for; in general fileNameExpression can be used to generate a destination name with a timestamp.

It seems a bit odd to store a file as x<timestamp>.txt if x.txt already exists, rather than always as x<timestamp>.txt.

We could could consider adding some strategy interface such as

@FunctionalInterface
public interface LastChanceNamingStrategy {

    public String lastChanceFileName(String targetName, boolean exists);

}