如何使Apache Camel在“直接”路由的末尾删除文件？

Question

I have a situation where I'm consuming from a direct endpoint. The body of the Exchange contains a File . Is there a way via the Spring DSL to delete this File at the end of the route?

For example, I have a route that looks like

<route>
    <from uri="direct:start"/>
    <to uri="file:/data/files"/>
</route>

The file gets copied to /data/files , but the original is left alone.

I know I can add something like

<to uri="bean:deleter?method=delete"/>

to the end of the route to perform the deletion, but I was wondering if there were a camel specific way to handle it.

Answer 1

Well, that really depends on how you pick up the file. But seeing how in comments you seem to imply that the file is not coming from a file endpoint then I'm afraid that you're left with having to do the cleanup yourself.

If you are using ProducerTemplate to send the file to direct then you can delete it in the sender method:

try {
    ProducerTemplate template = ...;
    template.sendBody("direct:start", file);
} finally {
    file.delete();
}

Otherwise, you can either have a bean method that will do the deletion for you or - my suggestion - you could try to move the file reading behavior to Camel, so that your route with file instead of direct .

EDIT:

If you are using Camel 2.15+, you can also try using pollEnrich() with dynamic URIs , given that you previously set the file or filename name somewhere in the exchange (eg body, exchange property, header...):

<route>
    <from uri="direct:start"/>
    <pollEnrich>
        <!--Example for  java.io.File body-->
        <simple>file:${body.parent}?fileName=${body.name}&delete=true</simple>

        <!--Example for file dir and file name as exchange properties-->
        <!--<simple>file:${exchangeProperty.myFileDir}?fileName=${exchangeProperty.myFileName}&delete=true</simple>-->
    </pollEnrich>
    <to uri="file:/data/files"/>
</route>

Answer 2

You need to set the delete parameter to equal true in your original from endpoint when the file is picked up. For example:

from("file://inobox?delete=true")

For more parameters: http://camel.apache.org/file2.html