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From "Siegfried Goeschl (JIRA)" <j...@apache.org>
Subject [jira] Commented: (EMAIL-72) sending several emails in a batch
Date Sun, 05 Apr 2009 20:31:12 GMT

    [ https://issues.apache.org/jira/browse/EMAIL-72?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12695910#action_12695910
] 

Siegfried Goeschl commented on EMAIL-72:
----------------------------------------

The behaviour of email.setMailSession() has changed in the current trunk - so if you are using
mail authentication and set NO username/password the mail session is used as it is.

> sending several emails in a batch
> ---------------------------------
>
>                 Key: EMAIL-72
>                 URL: https://issues.apache.org/jira/browse/EMAIL-72
>             Project: Commons Email
>          Issue Type: New Feature
>         Environment: any
>            Reporter: Hao Zheng
>         Attachments: DemoMailer.java
>
>
> I found when i want to send several emails in one connection, Commons Email doesn't help.
It connects to the SMTP server per email, and it spends more time on connecting and authentication
than sending the mails themselve (most SMTP server needs authentication). So I have to code
on the javamail api directly, something like:
>         SMTPSSLTransport strans = (SMTPSSLTransport) sess.getTransport();
>         strans.connect();
>         int num = 1000;
>         for (int i = 0; i < num; i++) {
>             SMTPMessage email = createMessage(sess, num);
>             strans.sendMessage(email, email.getAllRecipients());
>         }
>         strans.close();
> In my straightforward test, it saves me 2/3 of the time. So I think it would be nice
to add this kind of function into Commons Email, to make it more useful.
> My suggestion is to extract a cleaner Email bean, which contains all email dependent
information, e.g. TO, CC, Subject, etc, but leaves out all host/server dependent information,
e.g. authenticator, host address, host port, etc. After that, we can still provide simple
convenience method for those who only want to send one mail every time. And it is possible
to add methods like 'addEmail' to add several mails before sending, and later on, when it
is called 'send', we can send them in one SMTP connection. It's much like the API of javamail
itself, but we can provide more convenient usage than it. Code will look like this:
>  EmailTransmission trans = new EmailTransmission();
>  trans.setHostName("smtp.myserver.org");
>  HtmlEmail email1 = new HtmlEmail();
>  ...
>  HtmlEmail email2 = new HtmlEmail();
>  ...
>  trans.addEmail(email1);
>  trans.addEmail(email2);
>  ..
>  trans.send();

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