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https://github.com/EchoVault/SugarDB.git
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ec69e52a5b
Refactored pubsub implementation to return MessageReader on embedded instance, which implements io.Reader for reading messages (#170) - @kelvinmwinuka
60 lines
1.3 KiB
Go
60 lines
1.3 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 pubsub
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import (
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"bufio"
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"bytes"
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"sync"
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)
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type EmbeddedSub struct {
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mux sync.Mutex
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buff *bytes.Buffer
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writer *bufio.Writer
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reader *bufio.Reader
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}
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func NewEmbeddedSub() *EmbeddedSub {
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sub := &EmbeddedSub{
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mux: sync.Mutex{},
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buff: bytes.NewBuffer(make([]byte, 0)),
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}
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sub.writer = bufio.NewWriter(sub.buff)
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sub.reader = bufio.NewReader(sub.buff)
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return sub
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}
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func (sub *EmbeddedSub) Write(p []byte) (int, error) {
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sub.mux.Lock()
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defer sub.mux.Unlock()
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n, err := sub.writer.Write(p)
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if err != nil {
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return n, err
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}
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err = sub.writer.Flush()
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return n, err
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}
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func (sub *EmbeddedSub) Read(p []byte) (int, error) {
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sub.mux.Lock()
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defer sub.mux.Unlock()
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chunk, err := sub.reader.ReadBytes(byte('\n'))
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n := copy(p, chunk)
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return n, err
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}
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