Ejemplo n.º 1
0
func (s *RelationerSuite) assertHook(c *C, expect hook.Info) {
	s.State.StartSync()
	select {
	case hi, ok := <-s.hooks:
		c.Assert(ok, Equals, true)
		expect.ChangeVersion = hi.ChangeVersion
		c.Assert(hi, DeepEquals, expect)
		c.Assert(s.dir.Write(hi), Equals, nil)
	case <-time.After(500 * time.Millisecond):
		c.Fatalf("timed out waiting for %#v", expect)
	}
}
Ejemplo n.º 2
0
func (s *RelationerSuite) assertHook(c *C, expect hook.Info) {
	s.State.StartSync()
	// We must ensure the local state dir exists first.
	c.Assert(s.dir.Ensure(), IsNil)
	select {
	case hi, ok := <-s.hooks:
		c.Assert(ok, Equals, true)
		expect.ChangeVersion = hi.ChangeVersion
		c.Assert(hi, DeepEquals, expect)
		c.Assert(s.dir.Write(hi), Equals, nil)
	case <-time.After(coretesting.LongWait):
		c.Fatalf("timed out waiting for %#v", expect)
	}
}
Ejemplo n.º 3
0
func (s *RelationerSuite) TestPrepareCommitHooks(c *C) {
	r := uniter.NewRelationer(s.ru, s.dir, s.hooks)
	err := r.Join()
	c.Assert(err, IsNil)
	ctx := r.Context()
	c.Assert(ctx.UnitNames(), HasLen, 0)

	// Check preparing an invalid hook changes nothing.
	changed := hook.Info{
		Kind:          hook.RelationChanged,
		RemoteUnit:    "u/1",
		ChangeVersion: 7,
		Members: map[string]map[string]interface{}{
			"u/1": {"private-address": "glastonbury"},
		},
	}
	_, err = r.PrepareHook(changed)
	c.Assert(err, ErrorMatches, `inappropriate "relation-changed" for "u/1": unit has not joined`)
	c.Assert(ctx.UnitNames(), HasLen, 0)
	c.Assert(s.dir.State().Members, HasLen, 0)

	// Check preparing a valid hook updates the context, but not persistent
	// relation state.
	joined := hook.Info{
		Kind:       hook.RelationJoined,
		RemoteUnit: "u/1",
		Members: map[string]map[string]interface{}{
			"u/1": {"private-address": "u-1.example.com"},
		},
	}
	name, err := r.PrepareHook(joined)
	c.Assert(err, IsNil)
	c.Assert(s.dir.State().Members, HasLen, 0)
	c.Assert(name, Equals, "my-relation-relation-joined")
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1"})
	s1, err := ctx.ReadSettings("u/1")
	c.Assert(err, IsNil)
	c.Assert(s1, DeepEquals, joined.Members["u/1"])

	// Clear the changed hook's Members, as though it had been deserialized.
	changed.Members = nil

	// Check that preparing the following hook fails as before...
	_, err = r.PrepareHook(changed)
	c.Assert(err, ErrorMatches, `inappropriate "relation-changed" for "u/1": unit has not joined`)
	c.Assert(s.dir.State().Members, HasLen, 0)
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1"})
	s1, err = ctx.ReadSettings("u/1")
	c.Assert(err, IsNil)
	c.Assert(s1, DeepEquals, joined.Members["u/1"])

	// ...but that committing the previous hook updates the persistent
	// relation state...
	err = r.CommitHook(joined)
	c.Assert(err, IsNil)
	c.Assert(s.dir.State().Members, DeepEquals, map[string]int64{"u/1": 0})
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1"})
	s1, err = ctx.ReadSettings("u/1")
	c.Assert(err, IsNil)
	c.Assert(s1, DeepEquals, joined.Members["u/1"])

	// ...and allows us to prepare the next hook...
	name, err = r.PrepareHook(changed)
	c.Assert(err, IsNil)
	c.Assert(name, Equals, "my-relation-relation-changed")
	c.Assert(s.dir.State().Members, DeepEquals, map[string]int64{"u/1": 0})
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1"})
	s1, err = ctx.ReadSettings("u/1")
	c.Assert(err, IsNil)
	c.Assert(s1, DeepEquals, map[string]interface{}{"private-address": "u-1.example.com"})

	// ...and commit it.
	err = r.CommitHook(changed)
	c.Assert(err, IsNil)
	c.Assert(s.dir.State().Members, DeepEquals, map[string]int64{"u/1": 7})
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1"})

	// To verify implied behaviour above, prepare a new joined hook with
	// missing membership information, and check relation context
	// membership is updated appropriately...
	joined.RemoteUnit = "u/2"
	joined.ChangeVersion = 3
	joined.Members = nil
	name, err = r.PrepareHook(joined)
	c.Assert(err, IsNil)
	c.Assert(s.dir.State().Members, HasLen, 1)
	c.Assert(name, Equals, "my-relation-relation-joined")
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1", "u/2"})

	// ...and so is relation state on commit.
	err = r.CommitHook(joined)
	c.Assert(err, IsNil)
	c.Assert(s.dir.State().Members, DeepEquals, map[string]int64{"u/1": 7, "u/2": 3})
	c.Assert(ctx.UnitNames(), DeepEquals, []string{"u/1", "u/2"})
}