General cleanup and refactor of a lot of the API/WSGI service code.

bin/nova-api

@@ -24,6 +24,8 @@ import gettext
 import os
 import sys
 
+import eventlet.pool
+
 # If ../nova/__init__.py exists, add ../ to Python search path, so that
 # it will override what happens to be installed in /usr/(local/)lib/python...
 possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
@@ -46,6 +48,13 @@ LOG = logging.getLogger('nova.api')
 
 FLAGS = flags.FLAGS
 
+
+def launch(service_name):
+    _service = service.WSGIService(service_name)
+    _service.start()
+    _service.wait()
+
+
 if __name__ == '__main__':
     utils.default_flagfile()
     FLAGS(sys.argv)
@@ -57,5 +66,10 @@ if __name__ == '__main__':
         flag_get = FLAGS.get(flag, None)
         LOG.debug("%(flag)s : %(flag_get)s" % locals())
 
-    service = service.serve_wsgi(service.ApiService)
-    service.wait()
+
+    pool = eventlet.pool.Pool()
+    pool.execute(launch, "ec2")
+    pool.execute(launch, "osapi")
+    pool.wait_all()
+
+    print >>sys.stderr, "Exiting..."

nova/log.py

@@ -314,3 +314,16 @@ logging.setLoggerClass(NovaLogger)
 def audit(msg, *args, **kwargs):
     """Shortcut for logging to root log with sevrity 'AUDIT'."""
     logging.root.log(AUDIT, msg, *args, **kwargs)
+
+
+class WritableLogger(object):
+    """A thin wrapper that responds to `write` and logs."""
+
+    def __init__(self, logger, level=logging.DEBUG):
+        self.logger = logger
+        self.level = level
+
+    def write(self, msg):
+        self.logger.log(self.level, msg)
+
+