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rpc.go
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rpc.go
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// Copyright © 2014 Terry Mao, LiuDing All rights reserved.
// This file is part of gopush-cluster.
// gopush-cluster is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// gopush-cluster is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with gopush-cluster. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"encoding/json"
myrpc "github.com/Terry-Mao/gopush-cluster/rpc"
"net"
"net/rpc"
"time"
)
var (
// Delete messages channel
DelChan chan *DelMessageInfo
)
// RPC For receive offline messages
type MessageRPC struct {
}
// StartRPC start accept rpc call
func StartRPC() {
DelChan = make(chan *DelMessageInfo, 10000)
msg := &MessageRPC{}
rpc.Register(msg)
for _, bind := range Conf.Addr {
Log.Info("start rpc listen addr:\"%s\"", bind)
go rpcListen(bind)
}
// Start a routine for delete message
go DelProc()
}
func rpcListen(bind string) {
l, err := net.Listen("tcp", bind)
if err != nil {
Log.Error("net.Listen(\"tcp\", \"%s\") error(%v)", bind, err)
panic(err)
}
defer func() {
if err := l.Close(); err != nil {
Log.Error("listener.Close() error(%v)", err)
}
}()
rpc.Accept(l)
}
// Store offline pravite message interface
func (r *MessageRPC) Save(m *myrpc.MessageSaveArgs, ret *int) error {
Log.Info("save pravite message (mid:%d,msg:%s,expire:%d,key:%s)", m.MsgID, m.Msg, m.Expire, m.Key)
if m == nil || m.MsgID < 0 {
*ret = myrpc.ParamErr
return nil
}
// Json.Marshal and save the message
recordMsg := &Message{Msg: m.Msg, Expire: m.Expire, MsgID: m.MsgID}
if err := UseStorage.Save(m.Key, recordMsg, m.MsgID); err != nil {
Log.Error("UseStorage.Save(\"%s\",\"%v\",\"%d\") error(%v)", m.Key, *recordMsg, m.MsgID, err)
*ret = myrpc.InternalErr
return nil
}
*ret = myrpc.OK
return nil
}
// Store offline public message interface
func (r *MessageRPC) SavePub(m *myrpc.MessageSavePubArgs, ret *int) error {
Log.Info("save public message (mid:%d,msg:%s,expire:%d,key:%s)", m.MsgID, m.Msg, m.Expire, Conf.PKey)
if m == nil || m.MsgID < 0 {
*ret = myrpc.ParamErr
return nil
}
// Json.Marshal and save the message
recordMsg := &Message{Msg: m.Msg, Expire: m.Expire, MsgID: m.MsgID}
if err := UseStorage.Save(Conf.PKey, recordMsg, m.MsgID); err != nil {
Log.Error("UseStorage.Save(\"%s\",\"%v\",\"%d\") error(%v)", Conf.PKey, *recordMsg, m.MsgID, err)
*ret = myrpc.InternalErr
return nil
}
*ret = myrpc.OK
return nil
}
// Get offline message interface
func (r *MessageRPC) Get(m *myrpc.MessageGetArgs, rw *myrpc.MessageGetResp) error {
Log.Info("request message (mid:%d,pmid:%d,key:%s)", m.MsgID, m.PubMsgID, m.Key)
// Get all of offline messages which larger than MsgID that corresponding to m.Key
msgs, err := UseStorage.Get(m.Key, m.MsgID)
if err != nil {
Log.Error("UseStorage.Get(\"%s\", \"%d\") error(%v)", m.Key, m.MsgID, err)
rw.Ret = myrpc.InternalErr
return nil
}
// Get public offline messages which larger than PubMsgID
pMsgs, err := UseStorage.Get(Conf.PKey, m.PubMsgID)
if err != nil {
Log.Error("UseStorage.Get(\"%s\", \"%d\") error(%v)", Conf.PKey, m.PubMsgID, err)
rw.Ret = myrpc.InternalErr
return nil
}
numMsg := len(msgs)
numPMsg := len(pMsgs)
if numMsg == 0 && numPMsg == 0 {
rw.Ret = myrpc.OK
Log.Info("response message nil, request key(\"%s\") mid(\"%d\") pmid(\"%d\")", m.Key, m.MsgID, m.PubMsgID)
return nil
}
var (
data []string
pData []string
delMsgs []string
delPMsgs []string
msg = &Message{}
tNow = time.Now().Unix()
)
// Checkout expired offline messages
for i := 0; i < numMsg; i++ {
if err := json.Unmarshal([]byte(msgs[i]), &msg); err != nil {
Log.Error("internal message:\"%s\" error(%v)", msgs[i], err)
rw.Ret = myrpc.InternalErr
return nil
}
if tNow > msg.Expire {
delMsgs = append(delMsgs, msgs[i])
continue
}
data = append(data, msgs[i])
}
for i := 0; i < numPMsg; i++ {
if err := json.Unmarshal([]byte(pMsgs[i]), &msg); err != nil {
Log.Error("internal message:\"%s\" error(%v)", pMsgs[i], err)
rw.Ret = myrpc.InternalErr
return nil
}
if tNow > msg.Expire {
delPMsgs = append(delPMsgs, pMsgs[i])
continue
}
pData = append(pData, pMsgs[i])
}
// Send to delete message process
// TODO:delete expired message is useless as far as mysql storage
if len(delMsgs) != 0 {
Log.Info("delete expire private messages:\"%s\"", msgs)
DelChan <- &DelMessageInfo{Key: m.Key, Msgs: delMsgs}
}
if len(delPMsgs) != 0 {
Log.Info("delete expire public messages:\"%s\"", pMsgs)
DelChan <- &DelMessageInfo{Key: Conf.PKey, Msgs: delPMsgs}
}
rw.Ret = myrpc.OK
rw.Msgs = data
rw.PubMsgs = pData
Log.Info("response private_message(%s) public_message(%s)", data, pData)
return nil
}
// Clean offline message interface
func (r *MessageRPC) CleanKey(key string, ret *int) error {
if err := UseStorage.DelKey(key); err != nil {
Log.Error("clean offline message key:\"%s\" error(%v)", key, err)
*ret = myrpc.InternalErr
return nil
}
Log.Info("Clean Offline message key:\"%s\" OK", key)
return nil
}
// Server Ping interface
func (r *MessageRPC) Ping(p int, ret *int) error {
*ret = myrpc.OK
return nil
}
// Asynchronous delete message
func DelProc() {
for {
info := <-DelChan
if err := UseStorage.DelMulti(info); err != nil {
Log.Error("UseStorage.DelMulti(key:\"%s\", Msgs:\"%s\") error(%v)", info.Key, info.Msgs, err)
}
Log.Info("UseStorage.DelMulti(key:\"%s\", Msgs:\"%s\") OK", info.Key, info.Msgs)
}
}