Example #1
0
func (zkts *Server) CreateShard(keyspace, shard string, value *topo.Shard) error {
	shardPath := path.Join(globalKeyspacesPath, keyspace, "shards", shard)
	pathList := []string{
		shardPath,
		path.Join(shardPath, "action"),
		path.Join(shardPath, "actionlog"),
	}

	alreadyExists := false
	for i, zkPath := range pathList {
		c := ""
		if i == 0 {
			c = jscfg.ToJson(value)
		}
		_, err := zk.CreateRecursive(zkts.zconn, zkPath, c, 0, zookeeper.WorldACL(zookeeper.PERM_ALL))
		if err != nil {
			if zookeeper.IsError(err, zookeeper.ZNODEEXISTS) {
				alreadyExists = true
			} else {
				return fmt.Errorf("error creating shard: %v %v", zkPath, err)
			}
		}
	}
	if alreadyExists {
		return topo.ErrNodeExists
	}

	event.Dispatch(&events.ShardChange{
		ShardInfo: *topo.NewShardInfo(keyspace, shard, value, -1),
		Status:    "created",
	})
	return nil
}
Example #2
0
func siBytes(start, end string) *topo.ShardInfo {
	return topo.NewShardInfo("keyspace", start+"-"+end, &topo.Shard{
		KeyRange: key.KeyRange{
			Start: key.KeyspaceId(start),
			End:   key.KeyspaceId(end),
		},
	}, 0)
}
Example #3
0
func TestMigrateServedFromSyslogReverse(t *testing.T) {
	wantSev, wantMsg := syslog.LOG_INFO, "keyspace-1 [migrate served-from keyspace-2/source-shard <- keyspace-1/dest-shard] status"
	ev := &MigrateServedFrom{
		Keyspace:         *topo.NewKeyspaceInfo("keyspace-1", nil, -1),
		SourceShard:      *topo.NewShardInfo("keyspace-2", "source-shard", nil, -1),
		DestinationShard: *topo.NewShardInfo("keyspace-1", "dest-shard", nil, -1),
		Reverse:          true,
		StatusUpdater:    base.StatusUpdater{Status: "status"},
	}
	gotSev, gotMsg := ev.Syslog()

	if gotSev != wantSev {
		t.Errorf("wrong severity: got %v, want %v", gotSev, wantSev)
	}
	if gotMsg != wantMsg {
		t.Errorf("wrong message: got %v, want %v", gotMsg, wantMsg)
	}
}
Example #4
0
func si(start, end string) *topo.ShardInfo {
	s := hki(start)
	e := hki(end)
	return topo.NewShardInfo("keyspace", s.String()+"-"+e.String(), &topo.Shard{
		KeyRange: key.KeyRange{
			Start: s,
			End:   e,
		},
	}, 0)
}
func TestShardChangeSyslog(t *testing.T) {
	wantSev, wantMsg := syslog.LOG_INFO, "keyspace-123/shard-123 [shard] status"
	sc := &ShardChange{
		ShardInfo: *topo.NewShardInfo("keyspace-123", "shard-123", nil, -1),
		Status:    "status",
	}
	gotSev, gotMsg := sc.Syslog()

	if gotSev != wantSev {
		t.Errorf("wrong severity: got %v, want %v", gotSev, wantSev)
	}
	if gotMsg != wantMsg {
		t.Errorf("wrong message: got %v, want %v", gotMsg, wantMsg)
	}
}
Example #6
0
func TestMigrateServedTypesSyslogReverse(t *testing.T) {
	wantSev, wantMsg := syslog.LOG_INFO, "keyspace-1 [migrate served-types {src1, src2} <- {dst1, dst2}] status"
	ev := &MigrateServedTypes{
		Keyspace: *topo.NewKeyspaceInfo("keyspace-1", nil, -1),
		SourceShards: []*topo.ShardInfo{
			topo.NewShardInfo("keyspace-1", "src1", nil, -1),
			topo.NewShardInfo("keyspace-1", "src2", nil, -1),
		},
		DestinationShards: []*topo.ShardInfo{
			topo.NewShardInfo("keyspace-1", "dst1", nil, -1),
			topo.NewShardInfo("keyspace-1", "dst2", nil, -1),
		},
		Reverse:       true,
		StatusUpdater: base.StatusUpdater{Status: "status"},
	}
	gotSev, gotMsg := ev.Syslog()

	if gotSev != wantSev {
		t.Errorf("wrong severity: got %v, want %v", gotSev, wantSev)
	}
	if gotMsg != wantMsg {
		t.Errorf("wrong message: got %v, want %v", gotMsg, wantMsg)
	}
}
Example #7
0
func (zkts *Server) DeleteShard(keyspace, shard string) error {
	shardPath := path.Join(globalKeyspacesPath, keyspace, "shards", shard)
	err := zk.DeleteRecursive(zkts.zconn, shardPath, -1)
	if err != nil {
		if zookeeper.IsError(err, zookeeper.ZNONODE) {
			err = topo.ErrNoNode
		}
		return err
	}

	event.Dispatch(&events.ShardChange{
		ShardInfo: *topo.NewShardInfo(keyspace, shard, nil, -1),
		Status:    "deleted",
	})
	return nil
}
Example #8
0
func (zkts *Server) GetShard(keyspace, shard string) (*topo.ShardInfo, error) {
	shardPath := path.Join(globalKeyspacesPath, keyspace, "shards", shard)
	data, stat, err := zkts.zconn.Get(shardPath)
	if err != nil {
		if zookeeper.IsError(err, zookeeper.ZNONODE) {
			err = topo.ErrNoNode
		}
		return nil, err
	}

	s := &topo.Shard{}
	if err = json.Unmarshal([]byte(data), s); err != nil {
		return nil, fmt.Errorf("bad shard data %v", err)
	}

	return topo.NewShardInfo(keyspace, shard, s, int64(stat.Version())), nil
}