Refactor au_test_harness into modules and refactor to use worker design.

bin/au_test_harness/dev_server_wrapper.py

Index: bin/au_test_harness/dev_server_wrapper.py
diff --git a/bin/au_test_harness/dev_server_wrapper.py b/bin/au_test_harness/dev_server_wrapper.py
new file mode 100644
index 0000000000000000000000000000000000000000..01b52d4d7d93f5500e4cc375370b112b1fe35a50
--- /dev/null
+++ b/bin/au_test_harness/dev_server_wrapper.py
@@ -0,0 +1,50 @@
+# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Module containing methods and classes to interact with a devserver instance.
+"""
+
+import threading
+
+import cros_build_lib as cros_lib
+
+def GenerateUpdateId(target, src, key):
+  """Returns a simple representation id of target and src paths."""
+  update_id = target
+  if src: update_id = '->'.join([update_id, src])
+  if key: update_id = '+'.join([update_id, key])
+  return update_id
+
+class DevServerWrapper(threading.Thread):
+  """A Simple wrapper around a dev server instance."""
+
+  def __init__(self):
+    self.proc = None
+    threading.Thread.__init__(self)
+
+  def run(self):
+    # Kill previous running instance of devserver if it exists.
+    cros_lib.RunCommand(['sudo', 'pkill', '-f', 'devserver.py'], error_ok=True,
+                        print_cmd=False)
+    cros_lib.RunCommand(['sudo',
+                         'start_devserver',
+                         '--archive_dir=./static',
+                         '--client_prefix=ChromeOSUpdateEngine',
+                         '--production',
+                        ], enter_chroot=True, print_cmd=False)
+
+  def Stop(self):
+    """Kills the devserver instance."""
+    cros_lib.RunCommand(['sudo', 'pkill', '-f', 'devserver.py'], error_ok=True,
+                        print_cmd=False)
+
+  @classmethod
+  def GetDevServerURL(cls, port, sub_dir):
+    """Returns the dev server url for a given port and sub directory."""
+    ip_addr = cros_lib.GetIPAddress()
+    if not port: port = 8080
+    url = 'http://%(ip)s:%(port)s/%(dir)s' % {'ip': ip_addr,
+                                              'port': str(port),
+                                              'dir': sub_dir}
+    return url