Fabio Berchtold created CAMEL-5459:
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Summary: Folder closed to early when working asynchronously
Key: CAMEL-5459
URL: https://issues.apache.org/jira/browse/CAMEL-5459
Project: Camel
Issue Type: Bug
Components: camel-mail
Affects Versions: 2.10.0
Environment: IMAP connection to mailserver
Reporter: Fabio Berchtold
Priority: Minor
When using a MailConsumer connected with IMAP to a mailserver and routing the
messages to SEDA or any other asynchronous endpoint,
it can cause a com.sun.mail.util.FolderClosedIOException or
javax.mail.FolderClosedException to happen if you are trying to process the
mails/messages attachments.
This is because the IMAP folder gets closed at the end of each
MailConsumer.poll()
I propose to add a new MailConfiguration option "closeFolder", which can
override this behaviour.
Here's an example on how to reproduce the problem. (Scala code, sorry! But it
should be self-explanatory)
You need a couple of mails with attachments in your mailbox to test this.
~10 mails should be enough to cause the exceptions.
import javax.mail.internet.MimeMultipart
import org.apache.camel.impl.DefaultCamelContext
import org.apache.camel.scala.dsl.builder.RouteBuilder
import scala.io.Source
object Main {
def main(args: Array[String]): Unit = {
val camelContext = new DefaultCamelContext
val host = "imap.gmail.com"
val username = "*****@gmail.com"
val password = "*****"
// this will cause com.sun.mail.util.FolderClosedIOException or
javax.mail.FolderClosedException
val endpoint =
"imaps://"+host+"?password="+password+"&username="+username+"&folderName=INBOX&unseen=false&disconnect=false&mapMailMessage=true&connectionTimeout=60000"
// with fix / new feature 'closeFolder' set to false
//val endpoint =
"imaps://"+host+"?password="+password+"&username="+username+"&folderName=INBOX&unseen=false&disconnect=false&mapMailMessage=true&connectionTimeout=60000&closeFolder=false"
camelContext.addRoutes(
new RouteBuilder {
endpoint
.to("seda:process")
from("seda:process?concurrentConsumers=5") ==> {
process { ex =>
val att =
ex.getIn.getBody.asInstanceOf[MimeMultipart].getBodyPart(1)
println("Attachment Name:" + att.getFileName)
println("Attachment Content:" + att.getDataHandler.getContent)
println("Attachment Content:" +
Source.fromInputStream(att.getDataHandler.getInputStream).mkString)
Thread.sleep(2500) // simulate some work being done here with the
attachment, takes time..
}
}
}
)
camelContext.start()
Thread.sleep(45 * 1000)
camelContext.stop()
}
}
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