Camel check file's last modified date frequently using scheduling service - file

Question

I want to use camel in my project to check a file's last modified date every xx minutes using camel's scheduling/timer service.
I read the document for file component it seems there is a polling function, however there is also a timer component for camel.
Anyone has some code example if i want to do with the requirement?

Answer 1

I would use the file consumer end point.
Something like this:
file:c:/foldername?delay=5000
This will scan the folder every 5 seconds for files and for each file send a message on the route.
You would probably need to store the previous times somewhere such as a text file or database and then compare the modified variable passed in the message to the modified one stored in the database or file.
A rough example of this would look like follows:
<route id="CheckFileRoute">
<from uri="file:d:/RMSInbox?delay=5000&readLock=changed/>
<log message="${ file:modified }/>
<bean ref="CompareDates"/>
</route>
The file consumer will place a lot of information regarding the file in the header such as modified date. Go read this link for more details on the variables in the header http://camel.apache.org/file2.html
The compare dates bean would be java class that acts like a processor which would have a structure like this:
public class CompareDates {
#Handler
public void CheckDates
(
#Body Object msgbody
, #Headers Map hdr
)
{
Date newDate = (Date)hdr.get("CamelFileLastModified");
Date oldDate = readfromfileorDatabase
if(newDate>oldDate)
{
//the date has changed look busy
}
}
Hope this gets you going.