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postgres/examples/listen.php
2018-10-15 10:44:40 -05:00

44 lines
1.2 KiB
PHP

#!/usr/bin/env php
<?php
require \dirname(__DIR__) . '/vendor/autoload.php';
use Amp\Loop;
use Amp\Postgres;
Loop::run(function () {
$config = Postgres\ConnectionConfig::fromString('host=localhost user=postgres');
$pool = Postgres\pool($config);
$channel = "test";
/** @var \Amp\Postgres\Listener $listener */
$listener = yield $pool->listen($channel);
\printf("Listening on channel '%s'\n", $listener->getChannel());
Loop::delay(3000, function () use ($listener) { // Unlisten in 3 seconds.
\printf("Unlistening from channel '%s'\n", $listener->getChannel());
return $listener->unlisten();
});
Loop::delay(1000, function () use ($pool, $channel) {
return $pool->notify($channel, "Data 1"); // Send first notification.
});
Loop::delay(2000, function () use ($pool, $channel) {
return $pool->notify($channel, "Data 2"); // Send second notification.
});
while (yield $listener->advance()) {
$notification = $listener->getCurrent();
\printf(
"Received notification from PID %d on channel '%s' with payload: %s\n",
$notification->pid,
$notification->channel,
$notification->payload
);
}
});