Add support for Cache API

This change provides support for the Cache API changes and
deprecation path for glance-cache-manage command.

Change-Id: I6fca9bbe6bc0bd9b14d8dba685405838131160af

glanceclient/v2/shell.py

@@ -23,6 +23,7 @@ from glanceclient._i18n import _
 from glanceclient.common import progressbar
 from glanceclient.common import utils
 from glanceclient import exc
+from glanceclient.v2 import cache
 from glanceclient.v2 import image_members
 from glanceclient.v2 import image_schema
 from glanceclient.v2 import images
@@ -1479,6 +1480,76 @@ def do_md_tag_list(gc, args):
     utils.print_list(tags, columns, field_settings=column_settings)
 
 
+@utils.arg('--target', default='both',
+           choices=cache.TARGET_VALUES,
+           help=_('Specify which target you want to clear'))
+def do_cache_clear(gc, args):
+    """Clear all images from cache, queue or both"""
+    if not gc.endpoint_provided:
+        utils.exit("Direct server endpoint needs to be provided. Do not use "
+                   "loadbalanced or catalog endpoints.")
+    try:
+        gc.cache.clear(args.target)
+    except exc.HTTPForbidden:
+        msg = _("You are not permitted to delete image(s) "
+                "from cache.")
+        utils.print_err(msg)
+    except exc.HTTPException as e:
+        msg = _("'%s': Unable to delete image(s) from cache." % e)
+        utils.print_err(msg)
+
+
+@utils.arg('id', metavar='<IMAGE_ID>', nargs='+',
+           help=_('ID of image(s) to delete from cache/queue.'))
+def do_cache_delete(gc, args):
+    """Delete image from cache/caching queue."""
+    if not gc.endpoint_provided:
+        utils.exit("Direct server endpoint needs to be provided. Do not use "
+                   "loadbalanced or catalog endpoints.")
+
+    for args_id in args.id:
+        try:
+            gc.cache.delete(args_id)
+        except exc.HTTPForbidden:
+            msg = _("You are not permitted to delete the image '%s' "
+                    "from cache." % args_id)
+            utils.print_err(msg)
+        except exc.HTTPException as e:
+            msg = _("'%s': Unable to delete image '%s' from cache."
+                    % (e, args_id))
+            utils.print_err(msg)
+
+
+def do_cache_list(gc, args):
+    """Get cache state."""
+    if not gc.endpoint_provided:
+        utils.exit("Direct server endpoint needs to be provided. Do not use "
+                   "loadbalanced or catalog endpoints.")
+    cached_images = gc.cache.list()
+    utils.print_cached_images(cached_images)
+
+
+@utils.arg('id', metavar='<IMAGE_ID>', nargs='+',
+           help=_('ID of image(s) to queue for caching.'))
+def do_cache_queue(gc, args):
+    """Queue image(s) for caching."""
+    if not gc.endpoint_provided:
+        utils.exit("Direct server endpoint needs to be provided. Do not use "
+                   "loadbalanced or catalog endpoints.")
+
+    for args_id in args.id:
+        try:
+            gc.cache.queue(args_id)
+        except exc.HTTPForbidden:
+            msg = _("You are not permitted to queue the image '%s' "
+                    "for caching." % args_id)
+            utils.print_err(msg)
+        except exc.HTTPException as e:
+            msg = _("'%s': Unable to queue image '%s' for caching."
+                    % (e, args_id))
+            utils.print_err(msg)
+
+
 @utils.arg('--sort-key', default='status',
            choices=tasks.SORT_KEY_VALUES,
            help=_('Sort task list by specified field.'))