Los mensajes normales son mensajes sin funciones especiales que proporciona ApsaraMQ for RocketMQ. Se diferencian de los mensajes con funciones especiales, como los programados, los retrasados, los ordenados y los transaccionales. Este tema proporciona código de ejemplo para enviar y recibir mensajes normales mediante el SDK de cliente HTTP para PHP.
Requisitos previos
Antes de comenzar, asegúrese de haber completado las siguientes tareas:
Instale el SDK for PHP. Para obtener más información, consulte Prepare the environment for the PHP SDK.
Cree en la consola de ApsaraMQ for RocketMQ los recursos que especificará en el código, como instancias, temas y grupos de consumidores. Para obtener más información, consulte Create resources.
Obtenga el par de AccessKey de su cuenta de Alibaba Cloud. Para obtener más información, consulte Create an AccessKey.
Envío de mensajes normales
El siguiente código de ejemplo muestra cómo enviar mensajes normales mediante el SDK de cliente HTTP para PHP:
<?php
require "vendor/autoload.php";
use MQ\Model\TopicMessage;
use MQ\MQClient;
class ProducerTest
{
private $client;
private $producer;
public function __construct()
{
$this->client = new MQClient(
// The HTTP endpoint. You can obtain the endpoint in the HTTP Endpoint section of the Instance Details page in the ApsaraMQ for RocketMQ console.
"${HTTP_ENDPOINT}",
// Make sure that the environment variables ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET are configured.
// The AccessKey ID that is used for authentication.
getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"),
// The AccessKey secret that is used for authentication.
getenv('ALIBABA_CLOUD_ACCESS_KEY_SECRET')
);
// The topic in which the message is produced. You must create the topic in the ApsaraMQ for RocketMQ console.
$topic = "${TOPIC}";
// The ID of the instance to which the topic belongs. You must create the instance in the ApsaraMQ for RocketMQ console.
// If the instance has a namespace, specify the ID of the instance. If the instance does not have a namespace, set the instanceID parameter to null or an empty string. You can obtain the namespace of the instance on the Instance Details page in the ApsaraMQ for RocketMQ console.
$instanceId = "${INSTANCE_ID}";
$this->producer = $this->client->getProducer($instanceId, $topic);
}
public function run()
{
try
{
for ($i=1; $i<=4; $i++)
{
$publishMessage = new TopicMessage(
// The message content.
"hello mq!"
);
// The custom attributes of the message.
$publishMessage->putProperty("a", $i);
// The message key.
$publishMessage->setMessageKey("MessageKey");
$result = $this->producer->publishMessage($publishMessage);
print "Send mq message success. msgId is:" . $result->getMessageId() . ", bodyMD5 is:" . $result->getMessageBodyMD5() . "\n";
}
} catch (\Exception $e) {
print_r($e->getMessage() . "\n");
}
}
}
$instance = new ProducerTest();
$instance->run();
?>
Suscripción a mensajes normales
El siguiente código de ejemplo muestra cómo suscribirse a mensajes normales mediante el SDK de cliente HTTP para PHP:
<?php
use MQ\MQClient;
require "vendor/autoload.php";
class ConsumerTest
{
private $client;
private $consumer;
public function __construct()
{
$this->client = new MQClient(
// The HTTP endpoint. You can obtain the endpoint in the HTTP Endpoint section of the Instance Details page in the ApsaraMQ for RocketMQ console.
"${HTTP_ENDPOINT}",
// Make sure that the environment variables ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET are configured.
// The AccessKey ID that is used for authentication.
getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"),
// The AccessKey secret that is used for authentication.
getenv('ALIBABA_CLOUD_ACCESS_KEY_SECRET')
);
// The topic in which the message is produced. You must create the topic in the ApsaraMQ for RocketMQ console.
$topic = "${TOPIC}";
// The ID of the consumer group that you created in the ApsaraMQ for RocketMQ console.
$groupId = "${GROUP_ID}";
// The ID of the instance to which the topic belongs. You must create the instance in the ApsaraMQ for RocketMQ console.
// If the instance has a namespace, specify the ID of the instance. If the instance does not have a namespace, set the instanceID parameter to null or an empty string. You can obtain the namespace of the instance on the Instance Details page in the ApsaraMQ for RocketMQ console.
$instanceId = "${INSTANCE_ID}";
$this->consumer = $this->client->getConsumer($instanceId, $topic, $groupId);
}
public function ackMessages($receiptHandles)
{
try {
$this->consumer->ackMessage($receiptHandles);
} catch (\Exception $e) {
if ($e instanceof MQ\Exception\AckMessageException) {
// If the handle of a message times out, the broker cannot receive an acknowledgment (ACK) for the message from the consumer.
printf("Ack Error, RequestId:%s\n", $e->getRequestId());
foreach ($e->getAckMessageErrorItems() as $errorItem) {
printf("\tReceiptHandle:%s, ErrorCode:%s, ErrorMsg:%s\n", $errorItem->getReceiptHandle(), $errorItem->getErrorCode(), $errorItem->getErrorCode());
}
}
}
}
public function run()
{
// Cyclically consume messages in the current thread. We recommend that you use multiple threads to concurrently consume messages.
while (True) {
try {
// Consume messages in long polling mode.
// If no message in the topic is available for consumption, the request is suspended on the broker for a period of time. This period of time is known as long polling period. If a message becomes available for consumption within the period of time, the broker immediately sends a response to the consumer.
$messages = $this->consumer->consumeMessage(
3, // The maximum number of messages that can be consumed at a time. In this example, the value is specified as 3. The maximum value that you can specify is 16.
3 // The duration of a long polling period. Unit: seconds. In this example, the value is specified as 3. The maximum value that you can specify is 30.
);
} catch (\MQ\Exception\MessageResolveException $e) {
// If messages cannot be parsed due to invalid characters in the message body, this exception is thrown.
// The messages that can be parsed as expected.
$messages = $e->getPartialResult()->getMessages();
// The messages that cannot be parsed as expected.
$failMessages = $e->getPartialResult()->getFailResolveMessages();
$receiptHandles = array();
foreach ($messages as $message) {
// The message consumption logic.
$receiptHandles[] = $message->getReceiptHandle();
printf("MsgID %s\n", $message->getMessageId());
}
foreach ($failMessages as $failMessage) {
// Handle the message that cannot be parsed due to invalid characters in the message body.
$receiptHandles[] = $failMessage->getReceiptHandle();
printf("Fail To Resolve Message. MsgID %s\n", $failMessage->getMessageId());
}
$this->ackMessages($receiptHandles);
continue;
} catch (\Exception $e) {
if ($e instanceof MQ\Exception\MessageNotExistException) {
// If no message is available for consumption, and the long polling mode continues to take effect.
printf("No message, contine long polling!RequestId:%s\n", $e->getRequestId());
continue;
}
print_r($e->getMessage() . "\n");
sleep(3);
continue;
}
print "consume finish, messages:\n";
// The message consumption logic.
$receiptHandles = array();
foreach ($messages as $message) {
$receiptHandles[] = $message->getReceiptHandle();
printf("MessageID:%s TAG:%s BODY:%s \nPublishTime:%d, FirstConsumeTime:%d, \nConsumedTimes:%d, NextConsumeTime:%d,MessageKey:%s\n",
$message->getMessageId(), $message->getMessageTag(), $message->getMessageBody(),
$message->getPublishTime(), $message->getFirstConsumeTime(), $message->getConsumedTimes(), $message->getNextConsumeTime(),
$message->getMessageKey());
print_r($message->getProperties());
}
// If the broker does not receive an ACK for a message from the consumer before the period of time specified in $message->getNextConsumeTime() elapses, the broker delivers the message to the consumer again.
// A unique timestamp is specified for the handle of a message each time the message is consumed.
print_r($receiptHandles);
$this->ackMessages($receiptHandles);
print "ack finish\n";
}
}
}
$instance = new ConsumerTest();
$instance->run();
?>