How to create mbox using Java JavaMail?

Question

How to read mail inbox using IMAP protocol and JavaMail and then use local disk to store mails. There is no documentation of mstor. I try this way but it seems that MStorStore just read local mbox instead of creating and updating it according to the external server passed as params in connect() function. I get error: Folder [Inbox] does not exist.

Session lSession = Session.getDefaultInstance(props);
MStorStore lStore = new MStorStore(lSession , new URLName("mstor:c:/some_path/" + _mailModel.account.login));
lStore.connect(_mailModel.account.imap, _mailModel.account.login, _mailModel.account.password);
Folder lInbox = lStore.getDefaultFolder().getFolder("Inbox");

The questioin is how to create MBox from javax.mail.Store that i could read and update using Mstor.

After having a quick look [MStorFolder](https://github.com/benfortuna/mstor/blob/master/src/main/java/net/fortuna/mstor/MStorFolder.java) might be what you are looking for. — SubOptimal, Mar 04 '16 at 08:55
No, MStorFolder extends java.mail.Folder and from what i see it is only to read from folder that already exist — Bartek Szczypien, Mar 04 '16 at 09:34
[MStorFolder.create](https://github.com/benfortuna/mstor/blob/master/src/main/java/net/fortuna/mstor/MStorFolder.java#L206) sounds like creating a folder. If it exists an exceptioin `new MessagingException("Folder already exists")` would be thrown. Sounds not to bad for me. — SubOptimal, Mar 04 '16 at 09:39
yes but the problem is MStorStore which is passed as argument in constructor to MStorFolder use either mstor protocol (local storage) or imaps and i cant download mbox from server and keep it sync — Bartek Szczypien, Mar 04 '16 at 09:51

score 0 · Answer 1 · answered May 06 '16 at 10:45

I don't know if I am answering the right question (or answering a question at all), but, here is a method I wrote in a Scala program that takes an array of javamail Messages (acquired via imap) and writes them to a new mbox file in a directory named "mbox" in the root of my project using MStorStore. The new file is named whatever is passed in the "mboxName" parameter.

def writeToMbox(messages: Array[Message], mboxName: String) {    
    val mProps = System.getProperties
    mProps.setProperty("mstor.mbox.metadataStrategy", "none")
    val mSession = Session.getDefaultInstance(mProps)
    val mStore = new MStorStore(mSession, new URLName("mstor:mbox"))
    mStore.connect
    val mFolder = mStore.getDefaultFolder
    val localMbox = (new File("mbox", mboxName)).createNewFile
    val mbox = mFolder.getFolder(mboxName)
    mbox.open(Folder.READ_WRITE)
    mbox.appendMessages(messages)
    mbox.close(false)
    mStore.close
  }

How to create mbox using Java JavaMail?

1 Answers1