Question

我正在尝试通过Amazon SES及其SDK发送大量电子邮件。我可以看到他们使用GuzzleHttp来保证诺言。

正在发送电子邮件，过了一会儿（有时在7封电子邮件之后，有时在10,000封之后），我从$promise->wait();抛出异常，并出现以下错误：

PHP致命错误：未捕获的GuzzleHttp \ Promise \ RejectionException： Promise被拒绝的原因：调用wait回调没有兑现...中的承诺

相关堆栈跟踪：

#0 /path/to/aws/GuzzleHttp/Promise/Promise.php(75): GuzzleHttp\Promise\exception_for()
#1 /path/to/myfile.php(725): GuzzleHttp\Promise\Promise->wait()

我的代码：

function sendMassEmails($subject, $message, $recipients)
{
    $SesClient = new SesClient([
        'profile' => 'default',
        'version' => '2010-12-01',
        'region' => 'eu-central-1'
    ]);

    $sender_email = 'MyCompany <noreply@mycompany.com>';
    $char_set = 'UTF-8';
    $commands = [];

    foreach ($recipients as $recipient) {
        $commands[] = $SesClient->getCommand('SendEmail', [
            'Destination' => [
                'ToAddresses' => [$recipient],
            ],
            'ReplyToAddresses' => [$sender_email],
            'Source' => $sender_email,
            'Message' => [
                'Body' => [
                    'Html' => [
                        'Charset' => $char_set,
                        'Data' => $message,
                    ],
                    'Text' => [
                        'Charset' => $char_set,
                        'Data' => convert_html_to_text($message),
                    ],
                ],
                'Subject' => [
                    'Charset' => $char_set,
                    'Data' => $subject,
                ],
            ],
            'ConfigurationSetName' => 'MyConfigurationSetName',
        ]);
    }

    $pool = new CommandPool($SesClient, $commands, [
        'concurrency' => 2,
        'before' => function (CommandInterface $cmd, $iteratorId) {
            $a = $cmd->toArray();
            echo sprintf('About to send %d: %s' . PHP_EOL, $iteratorId, $a['Destination']['ToAddresses'][0]);
        },
        'fulfilled' => function (ResultInterface $result, $iteratorId) use ($commands) {
            // log $commands[$iteratorId]['Destination']['ToAddresses'][0]
        },
        'rejected' => function (AwsException $reason, $iteratorId) use ($commands) {
            $logData = sprintf(
                '%s | Reason: %s' . PHP_EOL,
                $commands[$iteratorId]['Destination']['ToAddresses'][0],
                $reason
            );
            // log $logData
        },
    ]);

    $promise = $pool->promise();

    $promise->wait(); // <-- this line throws the exception

    $promise->then(function () {
        // Log 'done'
    });
}

我这样调用函数：

sendMassEmails('Subject', 'Message', ['email1@example.com', 'email2@example.com', ...]);

知道为什么会这样吗？

Answer 1

wait()方法意味着等待请求完成，即使其中一些失败。我相信在代码中您已经在EachPromise Class中扩展了CommandPool 。
因此，您可以尝试将并发性从2增加到4，这意味着与之前的2相比，现在可以同时进行4个计算，这在我们同时处理大量请求时是很好的。

承诺被拒绝的原因如下：调用wait回调无法解决承诺

1 个答案: