示例#1
0
// LockKeyspace will lock the keyspace in the topology server.
// UnlockKeyspace should be called if this returns no error.
func (n *ActionNode) LockKeyspace(ctx context.Context, ts topo.Server, keyspace string, lockTimeout time.Duration, interrupted chan struct{}) (lockPath string, err error) {
	log.Infof("Locking keyspace %v for action %v", keyspace, n.Action)

	span := trace.NewSpanFromContext(ctx)
	span.StartClient("TopoServer.LockKeyspaceForAction")
	span.Annotate("action", n.Action)
	span.Annotate("keyspace", keyspace)
	defer span.Finish()

	return ts.LockKeyspaceForAction(keyspace, n.ToJson(), lockTimeout, interrupted)
}
示例#2
0
文件: lock.go 项目: henryanand/vitess
func CheckKeyspaceLock(t *testing.T, ts topo.Server) {
	if err := ts.CreateKeyspace("test_keyspace", &topo.Keyspace{}); err != nil {
		t.Fatalf("CreateKeyspace: %v", err)
	}

	interrupted := make(chan struct{}, 1)
	lockPath, err := ts.LockKeyspaceForAction("test_keyspace", "fake-content", 5*time.Second, interrupted)
	if err != nil {
		t.Fatalf("LockKeyspaceForAction: %v", err)
	}

	// test we can't take the lock again
	if _, err := ts.LockKeyspaceForAction("test_keyspace", "unused-fake-content", time.Second/10, interrupted); err != topo.ErrTimeout {
		t.Errorf("LockKeyspaceForAction(again): %v", err)
	}

	// test we can interrupt taking the lock
	go func() {
		time.Sleep(time.Second / 10)
		close(interrupted)
	}()
	if _, err := ts.LockKeyspaceForAction("test_keyspace", "unused-fake-content", 5*time.Second, interrupted); err != topo.ErrInterrupted {
		t.Errorf("LockKeyspaceForAction(interrupted): %v", err)
	}

	if err := ts.UnlockKeyspaceForAction("test_keyspace", lockPath, "fake-results"); err != nil {
		t.Errorf("UnlockKeyspaceForAction(): %v", err)
	}

	// test we can't unlock again
	if err := ts.UnlockKeyspaceForAction("test_keyspace", lockPath, "fake-results"); err == nil {
		t.Error("UnlockKeyspaceForAction(again) worked")
	}

	// test we can't lock a non-existing keyspace
	interrupted = make(chan struct{}, 1)
	if _, err := ts.LockKeyspaceForAction("test_keyspace_666", "fake-content", 5*time.Second, interrupted); err == nil {
		t.Fatalf("LockKeyspaceForAction(test_keyspace_666) worked for non-existing keyspace")
	}
}