/
buff_consul_writer.go
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/
buff_consul_writer.go
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// Copyright 2018 Bull S.A.S. Atos Technologies - Bull, Rue Jean Jaures, B.P.68, 78340, Les Clayes-sous-Bois, France.
//
// 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 events
import (
"io"
"regexp"
"time"
"github.com/ystia/yorc/v3/log"
)
// A BufferedLogEntryWriter is a Writer that buffers writes and flushes its buffer as an event log on a regular basis (every 5s)
type BufferedLogEntryWriter interface {
run(quit chan bool, logEntry LogEntry)
flush(logEntry LogEntry) error
io.Writer
}
// bufferedConsulWriter is internal BufferedLogEntryWriter implementation
type bufferedConsulWriter struct {
buf []byte
timeout time.Duration
}
// NewBufferedLogEntryWriter returns a BufferedLogEntryWriter used to register log entry
func NewBufferedLogEntryWriter() BufferedLogEntryWriter {
return &bufferedConsulWriter{
buf: make([]byte, 0),
timeout: 5 * time.Second,
}
}
// Write allows to write bytes into a bufferedConsulWriter
func (b *bufferedConsulWriter) Write(p []byte) (nn int, err error) {
b.buf = append(b.buf, p...)
return len(p), nil
}
// Internal : flush allows to flush buffer content into Consul
func (b *bufferedConsulWriter) flush(logEntry LogEntry) error {
if len(b.buf) == 0 {
return nil
}
log.Debug(string(b.buf))
reg := regexp.MustCompile(`\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]`)
out := reg.ReplaceAll(b.buf, []byte(""))
logEntry.Register(out)
b.buf = b.buf[:0]
return nil
}
// Internal : run allows to run buffering and allows flushing when done or after timeout
func (b *bufferedConsulWriter) run(quit chan bool, logEntry LogEntry) {
go func() {
for {
select {
case <-quit:
err := b.flush(logEntry)
if err != nil {
log.Print(err)
}
return
case <-time.After(b.timeout):
err := b.flush(logEntry)
if err != nil {
log.Print(err)
}
}
}
}()
}