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msg_dropdatabase.go
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/
msg_dropdatabase.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"
"github.com/FerretDB/FerretDB/internal/backends"
"github.com/FerretDB/FerretDB/internal/handlers/common"
"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"
)
// MsgDropDatabase implements HandlerInterface.
func (h *Handler) MsgDropDatabase(ctx context.Context, msg *wire.OpMsg) (*wire.OpMsg, error) {
document, err := msg.Document()
if err != nil {
return nil, lazyerrors.Error(err)
}
common.Ignored(document, h.L, "writeConcern", "comment")
dbName, err := common.GetRequiredParam[string](document, "$db")
if err != nil {
return nil, err
}
// Most backends would block on `DropDatabase` below otherwise.
//
// There is a race condition: another client could create a new cursor for that database
// after we closed all of them, but before we drop the database itself.
// In that case, we expect the client to wait or to retry the operation.
for _, c := range h.cursors.All() {
if c.DB == dbName {
c.Close()
}
}
err = h.b.DropDatabase(ctx, &backends.DropDatabaseParams{
Name: dbName,
})
res := must.NotFail(types.NewDocument())
switch {
case err == nil:
res.Set("dropped", dbName)
case backends.ErrorCodeIs(err, backends.ErrorCodeDatabaseNameIsInvalid):
// nothing?
case backends.ErrorCodeIs(err, backends.ErrorCodeDatabaseDoesNotExist):
// nothing
default:
return nil, lazyerrors.Error(err)
}
res.Set("ok", float64(1))
var reply wire.OpMsg
must.NoError(reply.SetSections(wire.OpMsgSection{
Documents: []*types.Document{res},
}))
return &reply, nil
}