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msg_listdatabases.go
124 lines (100 loc) · 2.96 KB
/
msg_listdatabases.go
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// Copyright 2021 FerretDB Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlite
import (
"context"
"go.uber.org/zap"
"github.com/FerretDB/FerretDB/internal/handlers/common"
"github.com/FerretDB/FerretDB/internal/handlers/commonparams"
"github.com/FerretDB/FerretDB/internal/types"
"github.com/FerretDB/FerretDB/internal/util/lazyerrors"
"github.com/FerretDB/FerretDB/internal/util/must"
"github.com/FerretDB/FerretDB/internal/wire"
)
// MsgListDatabases implements HandlerInterface.
func (h *Handler) MsgListDatabases(ctx context.Context, msg *wire.OpMsg) (*wire.OpMsg, error) {
document, err := msg.Document()
if err != nil {
return nil, lazyerrors.Error(err)
}
var filter *types.Document
if filter, err = common.GetOptionalParam(document, "filter", filter); err != nil {
return nil, err
}
common.Ignored(document, h.L, "comment", "authorizedDatabases")
var nameOnly bool
if v, _ := document.Get("nameOnly"); v != nil {
if nameOnly, err = commonparams.GetBoolOptionalParam("nameOnly", v); err != nil {
return nil, err
}
}
res, err := h.b.ListDatabases(ctx, nil)
if err != nil {
return nil, lazyerrors.Error(err)
}
var totalSize int64
databases := types.MakeArray(len(res.Databases))
for _, dbInfo := range res.Databases {
if nameOnly {
databases.Append(must.NotFail(types.NewDocument(
"name", dbInfo.Name,
)))
continue
}
db, err := h.b.Database(dbInfo.Name)
if err != nil {
h.L.Warn("Failed to get database", zap.Error(err))
continue
}
stats, err := db.Stats(ctx, nil)
if err != nil {
h.L.Warn("Failed to get database stats", zap.Error(err))
continue
}
d := must.NotFail(types.NewDocument(
"name", dbInfo.Name,
"sizeOnDisk", stats.SizeTotal,
"empty", stats.SizeTotal == 0,
))
totalSize += stats.SizeTotal
matches, err := common.FilterDocument(d, filter)
if err != nil {
return nil, lazyerrors.Error(err)
}
if !matches {
continue
}
databases.Append(d)
}
var reply wire.OpMsg
switch {
case nameOnly:
must.NoError(reply.SetSections(wire.OpMsgSection{
Documents: []*types.Document{must.NotFail(types.NewDocument(
"databases", databases,
"ok", float64(1),
))},
}))
default:
must.NoError(reply.SetSections(wire.OpMsgSection{
Documents: []*types.Document{must.NotFail(types.NewDocument(
"databases", databases,
"totalSize", totalSize,
"totalSizeMb", totalSize/1024/1024,
"ok", float64(1),
))},
}))
}
return &reply, nil
}