Example #1
0
// restoreRelations reconciles the local relation state dirs with the
// remote state of the corresponding relations.
func (u *Uniter) restoreRelations() error {
	joinedRelations, err := u.getJoinedRelations()
	if err != nil {
		return err
	}
	knownDirs, err := relation.ReadAllStateDirs(u.relationsDir)
	if err != nil {
		return err
	}
	for id, dir := range knownDirs {
		if rel, ok := joinedRelations[id]; ok {
			if err := u.addRelation(rel, dir); err != nil {
				return err
			}
		} else if err := dir.Remove(); err != nil {
			return err
		}
	}
	for id, rel := range joinedRelations {
		if _, ok := knownDirs[id]; ok {
			continue
		}
		dir, err := relation.ReadStateDir(u.relationsDir, id)
		if err != nil {
			return err
		}
		if err := u.addRelation(rel, dir); err != nil {
			return err
		}
	}
	return nil
}
Example #2
0
func (s *ReadAllStateDirsSuite) TestReadAllStateDirs(c *gc.C) {
	basedir := c.MkDir()
	relsdir := setUpDir(c, basedir, "relations", map[string]string{
		"ignored":     "blah",
		"foo-bar-123": "gibberish",
	})
	setUpDir(c, relsdir, "123", map[string]string{
		"foo-0":     "change-version: 1\n",
		"foo-1":     "change-version: 2\nchanged-pending: true\n",
		"gibberish": "gibberish",
	})
	setUpDir(c, relsdir, "456", map[string]string{
		"bar-0": "change-version: 3\n",
		"bar-1": "change-version: 4\n",
	})
	setUpDir(c, relsdir, "789", nil)
	setUpDir(c, relsdir, "onethousand", map[string]string{
		"baz-0": "change-version: 3\n",
		"baz-1": "change-version: 4\n",
	})

	dirs, err := relation.ReadAllStateDirs(relsdir)
	c.Assert(err, gc.IsNil)
	for id, dir := range dirs {
		c.Logf("%d: %#v", id, dir)
	}
	assertState(c, dirs[123], relsdir, 123, msi{"foo/0": 1, "foo/1": 2}, "foo/1", false)
	assertState(c, dirs[456], relsdir, 456, msi{"bar/0": 3, "bar/1": 4}, "", false)
	assertState(c, dirs[789], relsdir, 789, msi{}, "", false)
	c.Assert(dirs, gc.HasLen, 3)
}
Example #3
0
func (s *ReadAllStateDirsSuite) TestBadStateDir(c *gc.C) {
	basedir := c.MkDir()
	relsdir := setUpDir(c, basedir, "relations", nil)
	setUpDir(c, relsdir, "123", map[string]string{
		"bad-0": "blah: blah\n",
	})
	_, err := relation.ReadAllStateDirs(relsdir)
	c.Assert(err, gc.ErrorMatches, `cannot load relations state from .*: cannot load relation state from .*: invalid unit file "bad-0": "changed-version" not set`)
}
Example #4
0
func (s *ReadAllStateDirsSuite) TestNoDir(c *gc.C) {
	basedir := c.MkDir()
	relsdir := filepath.Join(basedir, "relations")

	dirs, err := relation.ReadAllStateDirs(relsdir)
	c.Assert(err, gc.IsNil)
	c.Assert(dirs, gc.HasLen, 0)

	_, err = os.Stat(relsdir)
	c.Assert(err, jc.Satisfies, os.IsNotExist)
}