// CopyShards will create the shards in the destination topo
func CopyShards(fromTS, toTS topo.Server, deleteKeyspaceShards bool) {
keyspaces, err := fromTS.GetKeyspaces()
if err != nil {
log.Fatalf("fromTS.GetKeyspaces: %v", err)
}
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, keyspace := range keyspaces {
wg.Add(1)
go func(keyspace string) {
defer wg.Done()
shards, err := fromTS.GetShardNames(keyspace)
if err != nil {
rec.RecordError(fmt.Errorf("GetShardNames(%v): %v", keyspace, err))
return
}
if deleteKeyspaceShards {
if err := toTS.DeleteKeyspaceShards(keyspace); err != nil {
rec.RecordError(fmt.Errorf("DeleteKeyspaceShards(%v): %v", keyspace, err))
return
}
}
for _, shard := range shards {
wg.Add(1)
go func(keyspace, shard string) {
defer wg.Done()
if err := topo.CreateShard(toTS, keyspace, shard); err != nil {
if err == topo.ErrNodeExists {
log.Warningf("shard %v/%v already exists", keyspace, shard)
} else {
rec.RecordError(fmt.Errorf("CreateShard(%v, %v): %v", keyspace, shard, err))
return
}
}
si, err := fromTS.GetShard(keyspace, shard)
if err != nil {
rec.RecordError(fmt.Errorf("GetShard(%v, %v): %v", keyspace, shard, err))
return
}
if err := toTS.UpdateShard(si); err != nil {
rec.RecordError(fmt.Errorf("UpdateShard(%v, %v): %v", keyspace, shard, err))
}
}(keyspace, shard)
}
}(keyspace)
}
wg.Wait()
if rec.HasErrors() {
log.Fatalf("copyShards failed: %v", rec.Error())
}
}
func CheckShard(t *testing.T, ts topo.Server) {
if err := ts.CreateKeyspace("test_keyspace", &topo.Keyspace{}); err != nil {
t.Fatalf("CreateKeyspace: %v", err)
}
if err := topo.CreateShard(ts, "test_keyspace", "B0-C0"); err != nil {
t.Fatalf("CreateShard: %v", err)
}
if err := topo.CreateShard(ts, "test_keyspace", "B0-C0"); err != topo.ErrNodeExists {
t.Errorf("CreateShard called second time, got: %v", err)
}
if _, err := ts.GetShard("test_keyspace", "666"); err != topo.ErrNoNode {
t.Errorf("GetShard(666): %v", err)
}
shardInfo, err := ts.GetShard("test_keyspace", "B0-C0")
if err != nil {
t.Errorf("GetShard: %v", err)
}
if want := newKeyRange("B0-C0"); shardInfo.KeyRange != want {
t.Errorf("shardInfo.KeyRange: want %v, got %v", want, shardInfo.KeyRange)
}
master := topo.TabletAlias{Cell: "ny", Uid: 1}
shardInfo.MasterAlias = master
shardInfo.KeyRange = newKeyRange("B0-C0")
shardInfo.ServedTypes = []topo.TabletType{topo.TYPE_MASTER, topo.TYPE_REPLICA, topo.TYPE_RDONLY}
shardInfo.SourceShards = []topo.SourceShard{
topo.SourceShard{
Uid: 1,
Keyspace: "source_ks",
Shard: "B8-C0",
KeyRange: newKeyRange("B8-C0"),
Tables: []string{"table1", "table2"},
},
}
if err := ts.UpdateShard(shardInfo); err != nil {
t.Errorf("UpdateShard: %v", err)
}
shardInfo, err = ts.GetShard("test_keyspace", "B0-C0")
if err != nil {
t.Errorf("GetShard: %v", err)
}
if shardInfo.MasterAlias != master {
t.Errorf("after UpdateShard: shardInfo.MasterAlias got %v", shardInfo.MasterAlias)
}
if shardInfo.KeyRange != newKeyRange("B0-C0") {
t.Errorf("after UpdateShard: shardInfo.KeyRange got %v", shardInfo.KeyRange)
}
if len(shardInfo.ServedTypes) != 3 || shardInfo.ServedTypes[0] != topo.TYPE_MASTER || shardInfo.ServedTypes[1] != topo.TYPE_REPLICA || shardInfo.ServedTypes[2] != topo.TYPE_RDONLY {
t.Errorf("after UpdateShard: shardInfo.ServedTypes got %v", shardInfo.ServedTypes)
}
if len(shardInfo.SourceShards) != 1 ||
shardInfo.SourceShards[0].Uid != 1 ||
shardInfo.SourceShards[0].Keyspace != "source_ks" ||
shardInfo.SourceShards[0].Shard != "B8-C0" ||
shardInfo.SourceShards[0].KeyRange != newKeyRange("B8-C0") ||
len(shardInfo.SourceShards[0].Tables) != 2 ||
shardInfo.SourceShards[0].Tables[0] != "table1" ||
shardInfo.SourceShards[0].Tables[1] != "table2" {
t.Errorf("after UpdateShard: shardInfo.SourceShards got %v", shardInfo.SourceShards)
}
shards, err := ts.GetShardNames("test_keyspace")
if err != nil {
t.Errorf("GetShardNames: %v", err)
}
if len(shards) != 1 || shards[0] != "B0-C0" {
t.Errorf(`GetShardNames: want [ "B0-C0" ], got %v`, shards)
}
if _, err := ts.GetShardNames("test_keyspace666"); err != topo.ErrNoNode {
t.Errorf("GetShardNames(666): %v", err)
}
}