mirror of
https://github.com/EchoVault/SugarDB.git
synced 2025-10-31 19:32:59 +08:00
71 lines
2.1 KiB
Go
71 lines
2.1 KiB
Go
// Copyright 2024 Kelvin Clement Mwinuka
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sugardb
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import (
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"errors"
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"slices"
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)
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// SetProtocol sets the RESP protocol that's expected from responses to embedded API calls.
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// This command does not affect the RESP protocol expected by any of the TCP clients.
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//
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// Parameters:
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//
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// `protocol` - int - The RESP version (either 2 or 3).
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//
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// Errors:
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//
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// "protocol must be either 2 or 3" - When the provided protocol is not either 2 or 3.
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func (server *SugarDB) SetProtocol(protocol int) error {
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if !slices.Contains([]int{2, 3}, protocol) {
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return errors.New("protocol must be either 2 or 3")
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}
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server.connInfo.mut.Lock()
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defer server.connInfo.mut.Unlock()
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server.connInfo.embedded.Protocol = protocol
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return nil
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}
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// SelectDB sets the logical database to use for all embedded API calls.
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// All subsequent calls after this call will use the new logical database.
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// This does not affect the databases used by any of the TCP clients.
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//
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// Parameters:
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//
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// `database` - int - The Database index.
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//
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// Errors:
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//
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// "database index must be 0 or higher" - When the database index is less than 0.
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func (server *SugarDB) SelectDB(database int) error {
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if database < 0 {
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return errors.New("database index must be 0 or higher")
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}
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// If the database index does not exist, create the new database.
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server.storeLock.Lock()
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if server.store[database] == nil {
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server.createDatabase(database)
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}
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server.storeLock.Unlock()
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// Set the DB.
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server.connInfo.mut.Lock()
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defer server.connInfo.mut.Unlock()
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server.connInfo.embedded.Database = database
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return nil
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}
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