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|
package sfive
import (
"time"
)
type appendManyToken struct {
data []DataUpdateFull
response chan bool
}
type getUpdatesResult struct {
values []DataUpdateFull
err error
}
type getUpdatesAfterToken struct {
id int
response chan getUpdatesResult
}
type getUpdatesToken struct {
response chan getUpdatesResult
}
type getHubIdResult struct {
id string
}
type getHubIdToken struct {
response chan getHubIdResult
}
type getLastUpdateIdResult struct {
id int
err error
}
type getLastUpdateIdToken struct {
response chan getLastUpdateIdResult
}
type Server struct {
store Store
quit chan bool
done chan bool
appendData chan DataUpdateFull
appendManyData chan appendManyToken // chan []DataUpdateFull
getUpdatesAfterChan chan getUpdatesAfterToken
getUpdatesChan chan getUpdatesToken
getHubIdChan chan getHubIdToken
getLastUpdateIdChan chan getLastUpdateIdToken
}
func (self Server) appendActor() {
defer func() { self.done <- true }()
for {
select {
case <-self.quit:
return
case value := <-self.appendData:
var err error
for tryNum := 0; tryNum < 5; tryNum++ {
err = self.store.Append(value)
if err != nil {
time.Sleep(1 * time.Second)
} else {
break
}
}
if err != nil {
s5l.Printf("failed to store data: %v\n", err)
}
case token := <-self.appendManyData:
err := self.store.AppendMany(token.data)
if err != nil {
s5l.Printf("failed to store many data: %v\n", err)
token.response <- false
} else {
token.response <- true
}
case token := <-self.getUpdatesAfterChan:
values, err := self.store.GetUpdatesAfter(token.id)
token.response <- getUpdatesResult{values, err}
case token := <-self.getUpdatesChan:
values, err := self.store.GetUpdates()
token.response <- getUpdatesResult{values, err}
case token := <-self.getHubIdChan:
token.response <- getHubIdResult{self.store.GetStoreId()}
case token := <-self.getLastUpdateIdChan:
lastUpdateId, err := self.store.GetLastUpdateId()
token.response <- getLastUpdateIdResult{lastUpdateId, err}
}
}
}
func (self Server) getUpdatesAfterInvoke(id int) ([]DataUpdateFull, error) {
token := getUpdatesAfterToken{id: id, response: make(chan getUpdatesResult, 1)}
defer close(token.response)
self.getUpdatesAfterChan <- token
res := <-token.response
return res.values, res.err
}
func (self Server) getUpdatesInvoke() ([]DataUpdateFull, error) {
token := getUpdatesToken{response: make(chan getUpdatesResult, 1)}
defer close(token.response)
self.getUpdatesChan <- token
res := <-token.response
return res.values, res.err
}
func (self Server) getHubIdInvoke() string {
token := getHubIdToken{response: make(chan getHubIdResult, 1)}
defer close(token.response)
self.getHubIdChan <- token
res := <-token.response
return res.id
}
func (self Server) getLastUpdateIdInvoke() (int, error) {
token := getLastUpdateIdToken{response: make(chan getLastUpdateIdResult, 1)}
defer close(token.response)
self.getLastUpdateIdChan <- token
res := <-token.response
return res.id, res.err
}
func (self Server) Close() {
self.quit <- true
<-self.done
close(self.quit)
close(self.done)
close(self.appendData)
close(self.appendManyData)
close(self.getUpdatesAfterChan)
close(self.getUpdatesChan)
close(self.getHubIdChan)
close(self.getLastUpdateIdChan)
self.store.Close()
}
func NewServer(dbPath string) (server *Server, err error) {
// TODO read configuration and create instance with correct settings
server = new(Server)
server.store, err = NewStore(dbPath)
if err != nil {
return
}
server.quit = make(chan bool)
server.done = make(chan bool)
server.appendData = make(chan DataUpdateFull, 5)
server.appendManyData = make(chan appendManyToken, 5)
server.getUpdatesAfterChan = make(chan getUpdatesAfterToken, 1)
server.getUpdatesChan = make(chan getUpdatesToken, 3)
server.getHubIdChan = make(chan getHubIdToken, 1)
server.getLastUpdateIdChan = make(chan getLastUpdateIdToken, 1)
go server.appendActor()
return
}
|
