8000 [Mailer] Randomize the first transport used by the RoundRobin transport by fabpot · Pull Request #35525 · symfony/symfony · GitHub
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[Mailer] Randomize the first transport used by the RoundRobin transport #35525

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Merged
merged 1 commit into from
Jan 31, 2020
Merged

[Mailer] Randomize the first transport used by the RoundRobin transport #35525

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12 changes: 12 additions & 0 deletions src/Symfony/Component/Mailer/Tests/Transport/FailoverTransportTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,9 @@ public function testSendFirstWork()
$t2 = $this->createMock(TransportInterface::class);
$t2->expects($this->never())->method('send');
$t = new FailoverTransport([$t1, $t2]);
$p = new \ReflectionProperty(RoundRobinTransport::class, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage(''));
$this->assertTransports($t, 1, []);
$t->send(new RawMessage(''));
Expand Down Expand Up @@ -74,6 +77,9 @@ public function testSendOneDead()
$t2 = $this->createMock(TransportInterface::class);
$t2->expects($this->exactly(3))->method('send');
$t = new FailoverTransport([$t1, $t2]);
$p = new \ReflectionProperty(RoundRobinTransport::class, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage(''));
$this->assertTransports($t, 0, [$t1]);
$t->send(new RawMessage(''));
Expand All @@ -93,6 +99,9 @@ public function testSendOneDeadAndRecoveryWithinRetryPeriod()
$t2->expects($this->at(2))->method('send');
$t2->expects($this->at(3))->method('send')->will($this->throwException(new TransportException()));
$t = new FailoverTransport([$t1, $t2], 6);
$p = new \ReflectionProperty(RoundRobinTransport::class, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage('')); // t1>fail - t2>sent
$this->assertTransports($t, 0, [$t1]);
sleep(4);
Expand Down Expand Up @@ -139,6 +148,9 @@ public function testSendOneDeadButRecover()
$t2->expects($this->at(1))->method('send');
$t2->expects($this->at(2))->method('send')->will($this->throwException(new TransportException()));
$t = new FailoverTransport([$t1, $t2], 1);
$p = new \ReflectionProperty(RoundRobinTransport::class, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage(''));
sleep(1);
$t->send(new RawMessage(''));
Expand Down
26 changes: 20 additions & 6 deletions src/Symfony/Component/Mailer/Tests/Transport/RoundRobinTransportTest.php
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Expand Up @@ -41,16 +41,16 @@ public function testToString()
public function testSendAlternate()
{
$t1 = $this->createMock(TransportInterface::class);
$t1->expects($this->exactly(2))->method('send');
$t1->expects($this->atLeast(1))->method('send');
$t2 = $this->createMock(TransportInterface::class);
$t2->expects($this->once())->method('send');
$t2->expects($this->atLeast(1))->method('send');
$t = new RoundRobinTransport([$t1, $t2]);
$t->send(new RawMessage(''));
$this->assertTransports($t, 1, []);
$cursor = $this->assertTransports($t, -1, []);
$t->send(new RawMessage(''));
$this->assertTransports($t, 0, []);
$cursor = $this->assertTransports($t, 0 === $cursor ? 1 : 0, []);
$t->send(new RawMessage(''));
$this->assertTransports($t, 1, []);
$this->assertTransports($t, 0 === $cursor ? 1 : 0, []);
}

public function testSendAllDead()
Expand All @@ -73,6 +73,9 @@ public function testSendOneDead()
$t2 = $this->createMock(TransportInterface::class);
$t2->expects($this->exactly(3))->method('send');
$t = new RoundRobinTransport([$t1, $t2]);
$p = new \ReflectionProperty($t, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage(''));
$this->assertTransports($t, 0, [$t1]);
$t->send(new RawMessage(''));
Expand All @@ -88,6 +91,9 @@ public function testSendOneDeadAndRecoveryNotWithinRetryPeriod()
$t2 = $this->createMock(TransportInterface::class);
$t2->expects($this->once())->method('send')->will($this->throwException(new TransportException()));
$t = new RoundRobinTransport([$t1, $t2], 60);
$p = new \ReflectionProperty($t, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage(''));
$this->assertTransports($t, 1, []);
$t->send(new RawMessage(''));
Expand All @@ -106,6 +112,9 @@ public function testSendOneDeadAndRecoveryWithinRetryPeriod()
$t2->expects($this->at(0))->method('send')->will($this->throwException(new TransportException()));
$t2->expects($this->at(1))->method('send');
$t = new RoundRobinTransport([$t1, $t2], 3);
$p = new \ReflectionProperty($t, 'cursor');
$p->setAccessible(true);
$p->setValue($t, 0);
$t->send(new RawMessage(''));
$this->assertTransports($t, 1, []);
$t->send(new RawMessage(''));
Expand All @@ -121,10 +130,15 @@ private function assertTransports(RoundRobinTransport $transport, int $cursor, a
{
$p = new \ReflectionProperty($transport, 'cursor');
$p->setAccessible(true);
$this->assertSame($cursor, $p->getValue($transport));
if (-1 !== $cursor) {
$this->assertSame($cursor, $p->getValue($transport));
}
$cursor = $p->getValue($transport);

$p = new \ReflectionProperty($transport, 'deadTransports');
$p->setAccessible(true);
$this->assertSame($deadTransports, iterator_to_array($p->getValue($transport)));

return $cursor;
}
}
8 changes: 7 additions & 1 deletion src/Symfony/Component/Mailer/Transport/RoundRobinTransport.php
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ class RoundRobinTransport implements TransportInterface
private $deadTransports;
private $transports = [];
private $retryPeriod;
private $cursor = 0;
private $cursor = -1;

/**
* @param TransportInterface[] $transports
Expand Down Expand Up @@ -66,6 +66,12 @@ public function __toString(): string
*/
protected function getNextTransport(): ?TransportInterface
{
if (-1 === $this->cursor) {
// the cursor initial value is randomized so that
// when are not in a daemon, we are still rotating the transports
$this->cursor = mt_rand(0, \count($this->transports) - 1);
}

$cursor = $this->cursor;
while (true) {
$transport = $this->transports[$cursor];
Expand Down
0