How to understand the properties of TCP/UDP server on the server side

This article will explain in detail how to understand the attributes of the TCP/UDP server in the server. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

$setting

The parameters set by the Server- > set () function are saved to the Server- > setting property. The value of the running parameter can be accessed in the callback function.

Swoole\ Server- > setting

Demo:

$server = new Swoole\ Server ('127.0.0.1, 9501); $server- > set ([' worker_num'= > 4,]); var_export ($server- > setting); echo PHP_EOL;//$server- > start (); / / the above code can be executed without start here

Run directly:

$master_pid

Returns the PID of the current server main process

Swoole\ Server- > master_pid: int

Demo:

$server = new Swoole\ Server ('127.0.0.1 server, 9501); $server- > set ([' worker_num'= > 4,]); var_export ($server- > setting); echo PHP_EOL;$server- > on ('start', function (Swoole\ Server $server) {/ / get the PID echo' master_pid:'.$server- > master_pid.PHP_EOL;} of the current server main process) $server- > on ('receive', function (Swoole\ Server $server, $fd, $reactor_id, $data) {/ / receive the client message, reply to the content, and close the connection $server- > send ($fd,' Swoole Server received your data:'.trim ($data). PHP_EOL); $server- > close ($fd);}); $server- > start ()

Start the service and connect using telnet, and then send the message "aaa" on the client:

$manager_pid

However, the PID of the current server management process

Swoole\ Server- > manager_pid: int

Can only be obtained after onStart and onWorkerStart

Demo:

$server = new Swoole\ Server ('127.0.0.1 server, 9501); $server- > on (' start', function (Swoole\ server $server) {/ / get the PID echo 'manager_pid:'.$server- > manager_pid.PHP_EOL;} of the current server management process) $server- > on ('receive', function (Swoole\ Server $server, $fd, $reactor_id, $data) {/ / receive the client message, reply to the content, and close the connection $server- > send ($fd,' Swoole Server received your data:'.trim ($data). PHP_EOL); $server- > close ($fd);}); $server- > start ()

As above, start the service and connect using telnet, and then send the message "aaa" on the client:

$worker_id

Get the current Worker process number, including the Task process.

Swoole\ Server- > worker_id: int

Demo:

$server = new Swoole\ Server ('127.0.0.1, 9501); $server- > set ([' worker_num'= > 4, 'task_worker_num'= > 4,]); $server- > on (' workerStart', function (Swoole\ Server $server, $workerId) {if ($server- > taskworker) {echo 'task workerId:'.$workerId; echo', taskworker _ id:'.$server- > worker_id.PHP_EOL;} else {echo 'workerId:'.$workerId Echo', worker_id:'.$server- > worker_id.PHP_EOL;}); / / must set onReceive event callback function $server- > on ('receive', function (Swoole\ Server $server, $fd, $reactor_id, $data) {}); / / must set onTask event callback function $server- > on (' task', function (Swoole\ Server $server, $task_id, $reactor_id, $data) {}); $server- > start ()

Start the server:

This Swoole\ Server- > worker_id attribute is the same as the $worker_id of onWorkerStart.

The Worker process number range is [0, $server- > setting ['worker_num']-1]

The Task process number range is: [$sever- > setting ['worker_num'], $server- > setting [' worker_num'] + $server- > setting ['task_worker_num']].

The value of worker_id remains unchanged after the Worker process is restarted

$worker_pid

Gets the operating system process ID of the current Worker process, the same as the return value of posix_getpid ().

Swoole\ Server- > worker_pid: int$taskworker

Whether the current process is a Task process

Swoole\ Server- > taskworker: bool

Return value: true indicates that the current process is a Task worker process, otherwise it is a Worker process

$connections

TCP connection iterator, you can use foreach to traverse all current connections to the server. The function of this property is the same as Server- > getClientList, but more friendly.

The traversal element is the fd of a single connection.

Swoole\ Server- > connections

The $connections property is an iterator object, not an PHP array, so it cannot be accessed with var_dump or array subscripts, but can only be looped through foreach.

Base mode

Boast processes are not supported to operate TCP connections in SWOOLE_BASE mode, so in BASE mode, the $connections iterator can only be used within the current process.

Demo:

Foreach ($server- > connections as $fd) {var_dump ($fd);} echo 'current server share' .count ($server- > connections). Connections to '.PHP _ EOL;$ports

An array of ports to listen for. If the server listens on multiple ports, you can traverse Server::$ports to get all Swoole\ Server\ Port objects.

Where swoole_server::$ports [0] is the master server port set by the constructor.

$ports = $server- > ports;$ports [0]-> set ($settings); $ports [1]-> on ('receive', function () {/ / onReceive event callback function}); ````so much about how to understand the attributes of the TCP/UDP server on the server. I hope the above can be helpful and learn more. If you think the article is good, you can share it for more people to see.