X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-base.git/blobdiff_plain/c4e45141f8612ae5977869c4ea6babb777cf6bd6..f2acfa0565a11ed251ad390461a5c428640681c2:/files/usr/share/python-support/sipb-xen-base/invirt/config.py

diff --git a/files/usr/share/python-support/sipb-xen-base/invirt/config.py b/files/usr/share/python-support/sipb-xen-base/invirt/config.py
deleted file mode 100644
index 29f7ce5..0000000
--- a/files/usr/share/python-support/sipb-xen-base/invirt/config.py
+++ /dev/null
@@ -1,57 +0,0 @@
-import json
-from invirt.common import *
-from os.path import getmtime
-
-default_src_path   = '/etc/invirt/master.yaml'
-default_cache_path = '/var/lib/invirt/cache.json'
-lock_file          = '/var/lib/invirt/cache.lock'
-
-def load(src_path = default_src_path,
-         cache_path = default_cache_path,
-         force_refresh = False):
-    """
-    Try loading the configuration from the faster-to-load JSON cache at
-    cache_path.  If it doesn't exist or is outdated, load the configuration
-    instead from the original YAML file at src_path and regenerate the cache.
-    I assume I have the permissions to write to the cache directory.
-    """
-    # Namespace container for various state variables, so that they can be
-    # updated by closures.
-    ns = struct()
-
-    if force_refresh:
-        ns.do_refresh = True
-    else:
-        src_mtime = getmtime(src_path)
-        try:            cache_mtime   = getmtime(cache_path)
-        except OSError: ns.do_refresh = True
-        else:           ns.do_refresh = src_mtime > cache_mtime
-
-    if not ns.do_refresh:
-        # Try reading from the cache first.  This must be transactionally
-        # isolated from concurrent writes to prevent reading an incomplete
-        # (changing) version of the data (but the transaction can share the
-        # lock with other concurrent reads).
-        @with_lock_file(lock_file, False)
-        def read_cache():
-            try: ns.cfg = with_closing(file(cache_path))(lambda f: json.read(f.read()))
-            except: ns.do_refresh = True
-
-    if ns.do_refresh:
-        # Atomically reload the source and regenerate the cache.  The read and
-        # write must be a single transaction, or a stale version may be
-        # written.
-        @with_lock_file(lock_file)
-        def refresh_cache():
-            import yaml
-            try:    default_loader = yaml.CSafeLoader
-            except: default_loader = yaml.SafeLoader
-            ns.cfg = with_closing(file(src_path))(lambda f: yaml.load(f, default_loader))
-            try: with_closing(file(cache_path, 'w'))(lambda f: f.write(json.write(ns.cfg)))
-            except: pass # silent failure
-    return ns.cfg
-
-dicts = load()
-structs = dicts2struct(dicts)
-
-# vim:et:sw=4:ts=4