"""

Email backend that writes messages to console instead of sending them.

"""

import sys

import threading

from django.core.mail.backends.base import BaseEmailBackend

class EmailBackend(BaseEmailBackend):

    def __init__(self, *args, **kwargs):

        self.stream = kwargs.pop('stream', sys.stdout)

        self._lock = threading.RLock()

        super(EmailBackend, self).__init__(*args, **kwargs)

    def send_messages(self, email_messages):

        """Write all messages to the stream in a thread-safe way."""

        if not email_messages:

            return

        self._lock.acquire()

        try:

            # The try-except is nested to allow for

            # Python 2.4 support (Refs #12147)

            try:

                stream_created = self.open()

                for message in email_messages:

                    self.stream.write('%s\n' % message.message().as_string())

                    self.stream.write('-'*79)

                    self.stream.write('\n')

                    self.stream.flush()  # flush after each message

                if stream_created:

                    self.close()

            except:

                if not self.fail_silently:

                    raise

        finally:

            self._lock.release()

        return len(email_messages)