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use Swoole\Coroutine;
class Context
{
protected static $pool = []; //进程创建后此静态变量就会存在,但只会根据对应的id去覆盖对应协程下的数据
// 基于协程 `ID` 获取数据
static function get($key)
{
$cid = Coroutine::getCid();
if ($cid < 0)
{
return null;
}
if(isset(self::$pool[$cid][$key])){
return self::$pool[$cid][$key];
}
return null;
}
// 基于协程 `ID` 写入数据
static function put($key, $item)
{
$cid = Coroutine::getCid();
if ($cid > 0)
{
self::$pool[$cid][$key] = $item;
}
}
// 基于协程 `ID` 删除数据
static function delete($key = null)
{
$cid = Coroutine::getCid();
if ($cid > 0)
{
if($key){
unset(self::$pool[$cid][$key]);
}else{
unset(self::$pool[$cid]);
}
}
}
}
$pool = new RedisPool();
$server = new Swoole\Http\Server('127.0.0.1', 9501);
$server->set([
// 如开启异步安全重启, 需要在workerExit释放连接池资源
'reload_async' => true
]);
$server->on('start', function (swoole_http_server $server) {
var_dump($server->master_pid);
});
$server->on('workerExit', function (swoole_http_server $server) use ($pool) {
$pool->destruct();
});
$server->on('request', function (swoole_http_request $req, swoole_http_response $resp) use ($pool) {
//从连接池中获取一个Redis协程客户端
$redis = $pool->get();
//连接失败
if ($redis === false) {
$resp->end("ERROR");
return;
}
$result = $redis->hgetall('key');
$resp->end(var_export($result, true));
//释放客户端,其他协程可复用此对象
$pool->put($redis);
});
$server->start();
class RedisPool
{
protected $available = true;
protected $pool;
public function __construct()
{
$this->pool = new SplQueue;
}
public function put($redis)
{
$this->pool->push($redis);
}
/**
* @return bool|mixed|\Swoole\Coroutine\Redis
*/
public function get()
{
//有空闲连接且连接池处于可用状态
if ($this->available && count($this->pool) > 0) {
return $this->pool->pop();
}
//无空闲连接,创建新连接
$redis = new Swoole\Coroutine\Redis();
$res = $redis->connect('127.0.0.1', 6379);
if ($res == false) {
return false;
} else {
return $redis;
}
}
public function destruct()
{
// 连接池销毁, 置不可用状态, 防止新的客户端进入常驻连接池, 导致服务器无法平滑退出
$this->available = false;
while (!$this->pool->isEmpty()) {
$this->pool->pop();
}
}
}
错误:
try {
Swoole\Coroutine::create(function () {
throw new \RuntimeException(__FILE__, __LINE__);
});
}
catch (\Throwable $e) {
echo $e;
}
#try/catch和throw在不同的协程中,
协程内无法捕获到此异常。
当协程退出时,发现有未捕获的异常,将引起致命错误。
正解:
function test() {
throw new \RuntimeException(__FILE__, __LINE__);
}
Swoole\Coroutine::create(function () {
try {
test();
}
catch (\Throwable $e) {
echo $e;
}
});
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