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testwal.go
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testwal.go
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/*
* Copyright 2022 ICON Foundation
*
* 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 consensus
import (
"io"
"path"
"github.com/icon-project/goloop/common/codec"
"github.com/icon-project/goloop/common/log"
)
type record struct {
bytes []byte
err error
}
type testWAL struct {
round []*record
lock []*record
commit []*record
}
func NewTestWAL() *testWAL {
return &testWAL{}
}
func (w *testWAL) data(id string) *[]*record {
id = path.Base(id)
switch id {
case "round":
return &w.round
case "lock":
return &w.lock
case "commit":
return &w.commit
default:
log.Panicf("invalid wal id %s", id)
return nil
}
}
func (w *testWAL) OpenForRead(id string) (WALReader, error) {
return &testWALReader{
*w.data(id),
}, nil
}
func (w *testWAL) OpenForWrite(id string, cfg *WALConfig) (WALWriter, error) {
return &testWALWriter{
cf: *cfg,
synced: w.data(id),
}, nil
}
type testWALReader struct {
data []*record
}
func (r *testWALReader) Read(v interface{}) ([]byte, error) {
bs, err := r.ReadBytes()
if err != nil {
return nil, err
}
return codec.UnmarshalFromBytes(bs, v)
}
func (r *testWALReader) ReadBytes() ([]byte, error) {
if len(r.data) == 0 {
return nil, io.EOF
}
m := r.data[0]
r.data = r.data[1:]
return m.bytes, nil
}
func (r *testWALReader) Close() error {
return nil
}
func (r *testWALReader) CloseAndRepair() error {
return nil
}
type testWALWriter struct {
cf WALConfig
synced *[]*record
buffered []*record
}
func (w *testWALWriter) WriteBytes(bytes []byte) (int, error) {
w.buffered = append(w.buffered, &record{bytes, nil})
return len(bytes), nil
}
func (w *testWALWriter) Sync() error {
*w.synced = append(*w.synced, w.buffered...)
return nil
}
func (w *testWALWriter) Close() error {
return w.Sync()
}