// TestTxnMultipleCoord checks that a coordinator uses the Writing flag to
// enforce that only one coordinator can be used for transactional writes.
func TestTxnMultipleCoord(t *testing.T) {
defer leaktest.AfterTest(t)
s := createTestDB(t)
defer s.Stop()
for i, tc := range []struct {
call proto.Call
writing bool
ok bool
}{
{proto.GetCall(proto.Key("a")), true, true},
{proto.GetCall(proto.Key("a")), false, true},
{proto.PutCall(proto.Key("a"), proto.Value{}), false, true},
{proto.PutCall(proto.Key("a"), proto.Value{}), true, false},
} {
{
txn := newTxn(s.Clock, proto.Key("a"))
txn.Writing = tc.writing
tc.call.Args.Header().Txn = txn
}
err := sendCall(s.Sender, tc.call)
if err == nil != tc.ok {
t.Errorf("%d: %T (writing=%t): success_expected=%t, but got: %v",
i, tc.call.Args, tc.writing, tc.ok, err)
}
if err != nil {
continue
}
txn := tc.call.Reply.Header().Txn
// The transaction should come back rw if it started rw or if we just
// wrote.
isWrite := proto.IsTransactionWrite(tc.call.Args)
if (tc.writing || isWrite) != txn.Writing {
t.Errorf("%d: unexpected writing state: %s", i, txn)
}
if !isWrite {
continue
}
// Abort for clean shutdown.
etReply := &proto.EndTransactionResponse{}
if err := sendCall(s.Sender, proto.Call{
Args: &proto.EndTransactionRequest{
RequestHeader: proto.RequestHeader{
Key: txn.Key,
Timestamp: txn.Timestamp,
Txn: txn,
},
Commit: false,
},
Reply: etReply,
}); err != nil {
log.Warning(err)
t.Fatal(err)
}
}
}
// Get retrieves the value for a key. A new result will be appended to the
// batch which will contain a single row.
//
// r, err := db.Get("a")
// // string(r.Rows[0].Key) == "a"
//
// key can be either a byte slice, a string, a fmt.Stringer or an
// encoding.BinaryMarshaler.
func (b *Batch) Get(key interface{}) {
k, err := marshalKey(key)
if err != nil {
b.initResult(0, 1, err)
return
}
b.calls = append(b.calls, proto.GetCall(proto.Key(k)))
b.initResult(1, 1, nil)
}
// GetStruct retrieves the specified columns in the structured table identified
// by obj. The primary key columns within obj are used to identify which row to
// retrieve. The obj type must have previously been bound to a table using
// BindModel. If columns is empty all of the columns are retrieved. Obj must be
// a pointer to the model type.
func (b *Batch) GetStruct(obj interface{}, columns ...string) {
v := reflect.ValueOf(obj)
m, err := b.DB.getModel(v.Type(), true)
if err != nil {
b.initResult(0, 0, err)
return
}
v = reflect.Indirect(v)
primaryKey, err := m.encodePrimaryKey(v)
if err != nil {
b.initResult(0, 0, err)
return
}
if len(columns) == 0 {
columns = m.otherColumnNames
} else {
lowerStrings(columns)
}
var calls []proto.Call
for _, colName := range columns {
col, ok := m.columnsByName[colName]
if !ok {
b.initResult(0, 0, fmt.Errorf("%s: unable to find column %s", m.name, colName))
return
}
key := m.encodeColumnKey(primaryKey, col.ID)
if log.V(2) {
log.Infof("Get %q", key)
}
c := proto.GetCall(proto.Key(key))
c.Post = func() error {
reply := c.Reply.(*proto.GetResponse)
return unmarshalValue(reply.Value, v.FieldByIndex(col.field.Index))
}
calls = append(calls, c)
}
b.calls = append(b.calls, calls...)
b.initResult(len(calls), len(calls), nil)
}
func TestNodeEventFeed(t *testing.T) {
defer leaktest.AfterTest(t)
nodeDesc := proto.NodeDescriptor{
NodeID: proto.NodeID(99),
}
// A testCase corresponds to a single Store event type. Each case contains a
// method which publishes a single event to the given storeEventPublisher,
// and an expected result interface which should match the produced
// event.
testCases := []struct {
name string
publishTo func(status.NodeEventFeed)
expected interface{}
}{
{
name: "Start",
publishTo: func(nef status.NodeEventFeed) {
nef.StartNode(nodeDesc, 100)
},
expected: &status.StartNodeEvent{
Desc: nodeDesc,
StartedAt: 100,
},
},
{
name: "Get",
publishTo: func(nef status.NodeEventFeed) {
call := proto.GetCall(proto.Key("abc"))
nef.CallComplete(call.Args, call.Reply)
},
expected: &status.CallSuccessEvent{
NodeID: proto.NodeID(1),
Method: proto.Get,
},
},
{
name: "Put",
publishTo: func(nef status.NodeEventFeed) {
call := proto.PutCall(proto.Key("abc"), proto.Value{Bytes: []byte("def")})
nef.CallComplete(call.Args, call.Reply)
},
expected: &status.CallSuccessEvent{
NodeID: proto.NodeID(1),
Method: proto.Put,
},
},
{
name: "Get Error",
publishTo: func(nef status.NodeEventFeed) {
call := proto.GetCall(proto.Key("abc"))
call.Reply.Header().SetGoError(util.Errorf("error"))
nef.CallComplete(call.Args, call.Reply)
},
expected: &status.CallErrorEvent{
NodeID: proto.NodeID(1),
Method: proto.Get,
},
},
}
// Compile expected events into a single slice.
expectedEvents := make([]interface{}, len(testCases))
for i := range testCases {
expectedEvents[i] = testCases[i].expected
}
events := make([]interface{}, 0, len(expectedEvents))
// Run test cases directly through a feed.
stopper := stop.NewStopper()
defer stopper.Stop()
feed := util.NewFeed(stopper)
feed.Subscribe(func(event interface{}) {
events = append(events, event)
})
nodefeed := status.NewNodeEventFeed(proto.NodeID(1), feed)
for _, tc := range testCases {
tc.publishTo(nodefeed)
}
feed.Flush()
if a, e := events, expectedEvents; !reflect.DeepEqual(a, e) {
t.Errorf("received incorrect events.\nexpected: %v\nactual: %v", e, a)
}
}
func TestNodeEventFeed(t *testing.T) {
defer leaktest.AfterTest(t)
// A testCase corresponds to a single Store event type. Each case contains a
// method which publishes a single event to the given storeEventPublisher,
// and an expected result interface which should match the produced
// event.
testCases := []struct {
name string
publishTo func(status.NodeEventFeed)
expected interface{}
}{
{
name: "Get",
publishTo: func(nef status.NodeEventFeed) {
call := proto.GetCall(proto.Key("abc"))
nef.CallComplete(call.Args, call.Reply)
},
expected: &status.CallSuccessEvent{
NodeID: proto.NodeID(1),
Method: proto.Get,
},
},
{
name: "Put",
publishTo: func(nef status.NodeEventFeed) {
call := proto.PutCall(proto.Key("abc"), proto.Value{Bytes: []byte("def")})
nef.CallComplete(call.Args, call.Reply)
},
expected: &status.CallSuccessEvent{
NodeID: proto.NodeID(1),
Method: proto.Put,
},
},
{
name: "Get Error",
publishTo: func(nef status.NodeEventFeed) {
call := proto.GetCall(proto.Key("abc"))
call.Reply.Header().SetGoError(util.Errorf("error"))
nef.CallComplete(call.Args, call.Reply)
},
expected: &status.CallErrorEvent{
NodeID: proto.NodeID(1),
Method: proto.Get,
},
},
}
// Compile expected events into a single slice.
expectedEvents := make([]interface{}, len(testCases))
for i := range testCases {
expectedEvents[i] = testCases[i].expected
}
// assertEventsEqual verifies that the given set of events is equal to the
// expectedEvents.
verifyEventSlice := func(source string, events []interface{}) {
if a, e := len(events), len(expectedEvents); a != e {
t.Errorf("%s had wrong number of events %d, expected %d", source, a, e)
return
}
for i := range events {
if a, e := events[i], expectedEvents[i]; !reflect.DeepEqual(a, e) {
t.Errorf("%s had wrong event for case %s: got %v, expected %v", source, testCases[i].name, a, e)
}
}
}
// Run test cases directly through a feed.
stopper, feed, consumers := startConsumerSet(3)
nodefeed := status.NewNodeEventFeed(proto.NodeID(1), feed)
for _, tc := range testCases {
tc.publishTo(nodefeed)
}
feed.Close()
waitForStopper(t, stopper)
for i, c := range consumers {
verifyEventSlice(fmt.Sprintf("feed direct consumer %d", i), c.received)
}
}
