1 files changed, 77 insertions, 0 deletions
diff --git a/pygerrit/stream.py b/pygerrit/stream.py
new file mode 100644
index 0000000..1504dde
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+++ b/pygerrit/stream.py
@@ -0,0 +1,77 @@
+# The MIT License
+#
+# Copyright 2012 Sony Mobile Communications. All rights reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+""" Gerrit event stream interface.
+
+Class to listen to the Gerrit event stream and dispatch events.
+
+"""
+
+from threading import Thread, Event
+
+from .events import ErrorEvent
+
+
+class GerritStream(Thread):
+
+    """ Gerrit events stream handler. """
+
+    def __init__(self, gerrit, ssh_client):
+        Thread.__init__(self)
+        self.daemon = True
+        self._gerrit = gerrit
+        self._ssh_client = ssh_client
+        self._stop = Event()
+        self._channel = None
+
+    def stop(self):
+        """ Stop the thread. """
+        self._stop.set()
+        if self._channel is not None:
+            self._channel.close()
+
+    def _error_event(self, error):
+        """ Dispatch `error` to the Gerrit client. """
+        self._gerrit.put_event(ErrorEvent.error_json(error))
+
+    def run(self):
+        """ Listen to the stream and send events to the client. """
+        channel = self._ssh_client.get_transport().open_session()
+        self._channel = channel
+        channel.exec_command("gerrit stream-events")
+        stdout = channel.makefile()
+        stderr = channel.makefile_stderr()
+        while not self._stop.is_set():
+            try:
+                if channel.exit_status_ready():
+                    if channel.recv_stderr_ready():
+                        error = stderr.readline().strip()
+                    else:
+                        error = "Remote server connection closed"
+                    self._error_event(error)
+                    self._stop.set()
+                else:
+                    data = stdout.readline()
+                    self._gerrit.put_event(data)
+            except Exception as e:  # pylint: disable=W0703
+                self._error_event(repr(e))
+                self._stop.set()