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readwriter.go
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readwriter.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 net
import (
"bytes"
"errors"
"time"
)
import (
log "github.com/sirupsen/logrus"
)
type MySQLEchoPkgHandler struct {
}
func NewMySQLEchoPkgHandler() *MySQLEchoPkgHandler {
return &MySQLEchoPkgHandler{}
}
func (h *MySQLEchoPkgHandler) Read(ss Session, data []byte) (interface{}, int, error) {
var (
err error
len int
pkg MySQLPackage
buf *bytes.Buffer
)
buf = bytes.NewBuffer(data)
len, err = pkg.Unmarshal(buf)
if err != nil {
if err == ErrNotEnoughStream {
return nil, 0, nil
}
return nil, 0, err
}
return &pkg, len, nil
}
func (h *MySQLEchoPkgHandler) Write(ss Session, pkg interface{}) ([]byte, error) {
var (
ok bool
err error
startTime time.Time
echoPkg *MySQLPackage
buf *bytes.Buffer
)
startTime = time.Now()
if echoPkg, ok = pkg.(*MySQLPackage); !ok {
log.Error("illegal pkg:%+v\n", pkg)
return nil, errors.New("invalid echo package!")
}
buf, err = echoPkg.Marshal()
if err != nil {
log.Warn("binary.Write(echoPkg{%#v}) = err{%#v}", echoPkg, err)
return nil, err
}
log.Debug("WriteEchoPkgTimeMs = %s", time.Since(startTime).String())
return buf.Bytes(), nil
}