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history.go
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history.go
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package history
import (
"encoding/json"
"io/ioutil"
"os"
"sync"
"gopkg.in/mgo.v2/bson"
"github.com/henrylee2cn/pholcus/app/downloader/request"
"github.com/henrylee2cn/pholcus/common/mgo"
"github.com/henrylee2cn/pholcus/common/mysql"
"github.com/henrylee2cn/pholcus/common/pool"
"github.com/henrylee2cn/pholcus/common/util"
"github.com/henrylee2cn/pholcus/config"
"github.com/henrylee2cn/pholcus/logs"
)
type (
Historier interface {
ReadSuccess(provider string, inherit bool) // 读取成功记录
UpsertSuccess(string) bool // 更新或加入成功记录
HasSuccess(string) bool // 检查是否存在某条成功记录
DeleteSuccess(string) // 删除成功记录
FlushSuccess(provider string) // I/O输出成功记录,但不清缓存
ReadFailure(provider string, inherit bool) // 取出失败记录
PullFailure() map[string]*request.Request // 拉取失败记录并清空
UpsertFailure(*request.Request) bool // 更新或加入失败记录
DeleteFailure(*request.Request) // 删除失败记录
FlushFailure(provider string) // I/O输出失败记录,但不清缓存
Empty() // 清空缓存,但不输出
}
History struct {
*Success
*Failure
provider string
sync.RWMutex
}
)
const (
SUCCESS_SUFFIX = config.HISTORY_TAG + "__y"
FAILURE_SUFFIX = config.HISTORY_TAG + "__n"
SUCCESS_FILE = config.HISTORY_DIR + "/" + SUCCESS_SUFFIX
FAILURE_FILE = config.HISTORY_DIR + "/" + FAILURE_SUFFIX
)
func New(name string, subName string) Historier {
successTabName := SUCCESS_SUFFIX + "__" + name
successFileName := SUCCESS_FILE + "__" + name
failureTabName := FAILURE_SUFFIX + "__" + name
failureFileName := FAILURE_FILE + "__" + name
if subName != "" {
successTabName += "__" + subName
successFileName += "__" + subName
failureTabName += "__" + subName
failureFileName += "__" + subName
}
return &History{
Success: &Success{
tabName: util.FileNameReplace(successTabName),
fileName: successFileName,
new: make(map[string]bool),
old: make(map[string]bool),
},
Failure: &Failure{
tabName: util.FileNameReplace(failureTabName),
fileName: failureFileName,
list: make(map[string]*request.Request),
},
}
}
// 读取成功记录
func (self *History) ReadSuccess(provider string, inherit bool) {
self.RWMutex.Lock()
self.provider = provider
self.RWMutex.Unlock()
if !inherit {
// 不继承历史记录时
self.Success.old = make(map[string]bool)
self.Success.new = make(map[string]bool)
self.Success.inheritable = false
return
} else if self.Success.inheritable {
// 本次与上次均继承历史记录时
return
} else {
// 上次没有继承历史记录,但本次继承时
self.Success.old = make(map[string]bool)
self.Success.new = make(map[string]bool)
self.Success.inheritable = true
}
switch provider {
case "mgo":
var docs = map[string]interface{}{}
err := mgo.Mgo(&docs, "find", map[string]interface{}{
"Database": config.DB_NAME,
"Collection": self.Success.tabName,
})
if err != nil {
logs.Log.Error(" * Fail [读取成功记录][mgo]: %v\n", err)
return
}
for _, v := range docs["Docs"].([]interface{}) {
self.Success.old[v.(bson.M)["_id"].(string)] = true
}
case "mysql":
_, err := mysql.DB()
if err != nil {
logs.Log.Error(" * Fail [读取成功记录][mysql]: %v\n", err)
return
}
table, ok := getReadMysqlTable(self.Success.tabName)
if !ok {
table = mysql.New().SetTableName(self.Success.tabName)
setReadMysqlTable(self.Success.tabName, table)
}
rows, err := table.SelectAll()
if err != nil {
return
}
for rows.Next() {
var id string
err = rows.Scan(&id)
self.Success.old[id] = true
}
default:
f, err := os.Open(self.Success.fileName)
if err != nil {
return
}
defer f.Close()
b, _ := ioutil.ReadAll(f)
if len(b) == 0 {
return
}
b[0] = '{'
json.Unmarshal(append(b, '}'), &self.Success.old)
}
logs.Log.Informational(" * [读取成功记录]: %v 条\n", len(self.Success.old))
}
// 取出失败记录
func (self *History) ReadFailure(provider string, inherit bool) {
self.RWMutex.Lock()
self.provider = provider
self.RWMutex.Unlock()
if !inherit {
// 不继承历史记录时
self.Failure.list = make(map[string]*request.Request)
self.Failure.inheritable = false
return
} else if self.Failure.inheritable {
// 本次与上次均继承历史记录时
return
} else {
// 上次没有继承历史记录,但本次继承时
self.Failure.list = make(map[string]*request.Request)
self.Failure.inheritable = true
}
var fLen int
switch provider {
case "mgo":
if mgo.Error() != nil {
logs.Log.Error(" * Fail [取出失败记录][mgo]: %v\n", mgo.Error())
return
}
var docs = []interface{}{}
mgo.Call(func(src pool.Src) error {
c := src.(*mgo.MgoSrc).DB(config.DB_NAME).C(self.Failure.tabName)
return c.Find(nil).All(&docs)
})
fLen = len(docs)
for _, v := range docs {
key := v.(bson.M)["_id"].(string)
failure := v.(bson.M)["failure"].(string)
req, err := request.UnSerialize(failure)
if err != nil {
continue
}
self.Failure.list[key] = req
}
case "mysql":
_, err := mysql.DB()
if err != nil {
logs.Log.Error(" * Fail [取出失败记录][mysql]: %v\n", err)
return
}
table, ok := getReadMysqlTable(self.Failure.tabName)
if !ok {
table = mysql.New().SetTableName(self.Failure.tabName)
setReadMysqlTable(self.Failure.tabName, table)
}
rows, err := table.SelectAll()
if err != nil {
return
}
for rows.Next() {
var key, failure string
err = rows.Scan(&key, &failure)
req, err := request.UnSerialize(failure)
if err != nil {
continue
}
self.Failure.list[key] = req
fLen++
}
default:
f, err := os.Open(self.Failure.fileName)
if err != nil {
return
}
b, _ := ioutil.ReadAll(f)
f.Close()
if len(b) == 0 {
return
}
docs := map[string]string{}
json.Unmarshal(b, &docs)
fLen = len(docs)
for key, s := range docs {
req, err := request.UnSerialize(s)
if err != nil {
continue
}
self.Failure.list[key] = req
}
}
logs.Log.Informational(" * [取出失败记录]: %v 条\n", fLen)
}
// 清空缓存,但不输出
func (self *History) Empty() {
self.RWMutex.Lock()
self.Success.new = make(map[string]bool)
self.Success.old = make(map[string]bool)
self.Failure.list = make(map[string]*request.Request)
self.RWMutex.Unlock()
}
// I/O输出成功记录,但不清缓存
func (self *History) FlushSuccess(provider string) {
self.RWMutex.Lock()
self.provider = provider
self.RWMutex.Unlock()
sucLen, err := self.Success.flush(provider)
if sucLen <= 0 {
return
}
// logs.Log.Informational(" * ")
if err != nil {
logs.Log.Error("%v", err)
} else {
logs.Log.Informational(" * [添加成功记录]: %v 条\n", sucLen)
}
}
// I/O输出失败记录,但不清缓存
func (self *History) FlushFailure(provider string) {
self.RWMutex.Lock()
self.provider = provider
self.RWMutex.Unlock()
failLen, err := self.Failure.flush(provider)
if failLen <= 0 {
return
}
// logs.Log.Informational(" * ")
if err != nil {
logs.Log.Error("%v", err)
} else {
logs.Log.Informational(" * [添加失败记录]: %v 条\n", failLen)
}
}
var (
readMysqlTable = map[string]*mysql.MyTable{}
readMysqlTableLock sync.RWMutex
)
func getReadMysqlTable(name string) (*mysql.MyTable, bool) {
readMysqlTableLock.RLock()
tab, ok := readMysqlTable[name]
readMysqlTableLock.RUnlock()
if ok {
return tab.Clone(), true
}
return nil, false
}
func setReadMysqlTable(name string, tab *mysql.MyTable) {
readMysqlTableLock.Lock()
readMysqlTable[name] = tab
readMysqlTableLock.Unlock()
}
var (
writeMysqlTable = map[string]*mysql.MyTable{}
writeMysqlTableLock sync.RWMutex
)
func getWriteMysqlTable(name string) (*mysql.MyTable, bool) {
writeMysqlTableLock.RLock()
tab, ok := writeMysqlTable[name]
writeMysqlTableLock.RUnlock()
if ok {
return tab.Clone(), true
}
return nil, false
}
func setWriteMysqlTable(name string, tab *mysql.MyTable) {
writeMysqlTableLock.Lock()
writeMysqlTable[name] = tab
writeMysqlTableLock.Unlock()
}