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noop_readerwrter.go
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// MIT License
//
// Copyright (c) 2023 Seth Osher
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package lazywritercache
import (
"errors"
"log"
)
type NoOpReaderWriter[T Cacheable] struct {
getTemplateItem func(key interface{}) T
panicOnLoad bool // for testing error handling
panicOnWrite bool // for testing error handling
}
// Check interface is complete
var _ CacheReaderWriter[string, EmptyCacheable] = (*NoOpReaderWriter[EmptyCacheable])(nil)
func NewNoOpReaderWriter[T Cacheable](itemTemplate func(key any) T, forcePanics ...bool) NoOpReaderWriter[T] {
doPanics := len(forcePanics) > 0 && forcePanics[0]
return NoOpReaderWriter[T]{
getTemplateItem: itemTemplate,
panicOnWrite: doPanics,
panicOnLoad: doPanics,
}
}
func (g NoOpReaderWriter[T]) Find(key string, _ interface{}) (T, error) {
template := g.getTemplateItem(key)
if g.panicOnLoad {
panic("test panic, read")
}
return template, errors.New("NoOp, item not found")
}
func (g NoOpReaderWriter[T]) Save(_ T, _ interface{}) error {
if g.panicOnWrite {
panic("test panic, write")
}
return nil
}
func (g NoOpReaderWriter[T]) BeginTx() (tx interface{}, err error) {
tx = "transaction"
return tx, nil
}
func (g NoOpReaderWriter[T]) CommitTx(_ interface{}) {
return
}
func (g NoOpReaderWriter[T]) Info(msg string, _ string, _ ...T) {
log.Print("[info] ", msg)
}
func (g NoOpReaderWriter[T]) Warn(msg string, _ string, _ ...T) {
log.Print("[warn] ", msg)
}