Learn The souce code of beanstalk

1. Beanstalkd 习
陈
11 11 11

2. 绍
• Beanstalkd 队
统
11 11 11

3. 设计
•
•队
• Producer-Comsumer
11 11 11

4. 11 11 11

5. • job 处 务,
Beanstalkd 单 ,
tube
• tube 务队 , 储
jobs. producer consumer 对
11 11 11

6. • producer Job 产 , 过Put
job tube
• consumer Job 费 过reserve/
release/bury/delete 获 job 变
job 态
11 11 11

7. Beanstalkd jobs
11 11 11

8. 协议
• Beanstalk 应 层协议,运 TCP协议
.
• Beanstalk 协议 ASCII编码
11 11 11

9. 协议
• 协议 户 发过 , 们
规 处 这 ,
给对 .
• http协议规 务
时 传给 务 这 骤 ,
务 处 , 给 户
11 11 11

10. 协议
•Beanstalkd 协议 rn标
传输结
•put<pri><delay> <ttr><bytes>
rn
11 11 11

11. 码
typedef struct job {
unsigned int pri;
int data_size;
int data_read;
unsigned char data[];
} *job;
11 11 11

12. typedef struct conn {
int fd;
char state;
struct event evq;
char cmd[LINE_BUF_SIZE];
int cmd_len;
int cmd_read;
const char *reply;
int reply_len;
int reply_sent;
job job;
} *conn;
11 11 11

13. 过
• listen_socket =make_server_socket
(HOST, PORT);
• Socket链 监 3232
11 11 11

14. 过
• set_sig_handlers();
• 对SIGPIPE 进 获
11 11 11

15. 过
• event_set(&listen_evq, listen_socket,
EV_READ | EV_PERSIST, (evh)
h_accept,&listen_evq);
• listen_evq,绑
listen_socket.
11 11 11

16. 过
• event_add(&listen_evq, NULL);
• event_dispatch();
• listen_evq, 让 进 环,
绪 处 .
11 11 11

17. 过
• 发,执 h_accept() .
• h_accept() conn 设 state为
STATE_WANTCOMMAND.
11 11 11

18. 过
• event_set(&c->evq, c->fd, flags, c-
>evq.ev_callback ? : handler, c);
• event_add(&c->evq, NULL);
• c->evq, 绑 c->fd.
.
11 11 11

19. 过
• 发 c->evq,执 h_conn
• c->state 为STATE_WANTCOMMAND
寻 结 rn. do_cmd()
11 11 11

20. 过
• c->state 为STATE_WANTDATA读
, Job. conn
Job.
• 这 Job Tube .(这
还 )
11 11 11

21. 过
• c->state 为STATE_SENDWORD时, c-
>fd
11 11 11

22. 过
• do_cmd() 负责处 put,peek,reserve
, 对Job 处 .
11 11 11

23. 谢谢!
11 11 11