- uses
netty 4.1 - https://livebook.manning.com/book/netty-in-action/chapter-1/57
- Non-blocking network calls free us from having to "wait for the completion" of an operation. Fully async I/O builds on this feature and carries it a step further: an async method returns immediately and notifies the user when it is complete, directly or at a later time.
Selectorsallow us to monitor many connections for events with many fewer threads.
cd server
gradle runNettyMicroServer#run ------> HttpServerChannel#initChannel ---> HeartbeatServerHandler#channelRead0$ curl -v localhost:9090
* Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 9090 (#0)
> GET / HTTP/1.1
> Host: localhost:9090
> User-Agent: curl/7.64.1
> Accept: */*
>
< HTTP/1.1 200 OK
< content-type: application/json
< content-length: 67
<
* Connection #0 to host localhost left intact
{"applicationName":"netty-netty-netty-netty-netty-netty-netty","applicationVersion":"1.0"}
* Closing connection 0## lower concurrent requests results higher throughput
## with 100 concurrent requests
ab -n 25000 -c 100 -k http://localhost:9090/
This is ApacheBench, Version 2.3 <$Revision: 1843412 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking localhost (be patient)
Completed 2500 requests
Completed 5000 requests
Completed 7500 requests
Completed 10000 requests
Completed 12500 requests
Completed 15000 requests
Completed 17500 requests
Completed 20000 requests
Completed 22500 requests
Completed 25000 requests
Finished 25000 requests
Server Software:
Server Hostname: localhost
Server Port: 9090
Document Path: /
Document Length: 67 bytes
Concurrency Level: 100
Time taken for tests: 0.320 seconds
Complete requests: 25000
Failed requests: 0
Keep-Alive requests: 25000
Total transferred: 4050000 bytes
HTML transferred: 1675000 bytes
Requests per second: 78120.36 [#/sec] (mean)
Time per request: 1.280 [ms] (mean)
Time per request: 0.013 [ms] (mean, across all concurrent requests)
Transfer rate: 12358.89 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.2 0 4
Processing: 0 1 0.5 1 9
Waiting: 0 1 0.5 1 9
Total: 0 1 0.6 1 9
Percentage of the requests served within a certain time (ms)
50% 1
66% 1
75% 1
80% 1
90% 2
95% 2
98% 2
99% 3
100% 9 (longest request)