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From "Fabio Berchtold (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAMEL-5459) Folder closed to early when working asynchronously
Date Mon, 23 Jul 2012 12:58:34 GMT
Fabio Berchtold created CAMEL-5459:
--------------------------------------

             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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