[英]how to check if a message has expired or not in activemq in the producer
我正在使用 activeMQ,我正在通過隊列從生產者向消費者發送消息。假設我的消費者由於某種原因失敗了。 我已將消息的到期時間設置為 15 分鍾,因此來自生產者的消息保留在隊列中並在 15 分鍾后到期。 如果 activeMQ 消息已過期或不在生產者隊列中而不是消費者隊列中,我如何以編程方式檢查並最終得到通知(這是由於我的設計)。
代碼片段如下。
初始化代碼
public void init() {
try {
final LocalProperties config = new LocalProperties();
final ConnectionFactory factory = new ActiveMQConnectionFactory(config.getActiveMqConnection());
this.connection = factory.createConnection(config.getActiveMqUser(), config.getActiveMqPassword());
this.connection.start();
this.session = this.connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
final Destination destination = this.session.createQueue(QUEUE_NAME);
this.producer = this.session.createProducer(destination);
this.producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
} catch (final JMSException e) {
_LOG.error("We could not open the active mq connection", e);
}
}
生產者代碼
public Response PostMessages(
final MessageDelivery body, final String messageId) {
try {
this.openConnection();
// Create a messages
final Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();
final String json = gson.toJson(body);
final TextMessage request = this.session.createTextMessage(json);
request.setLongProperty(
"expiryTime",
900000
);
request.setStringProperty("messageType", "com/messages/post");
request.setBooleanProperty("deliveryNotification", false);
request.setStringProperty("destination", "XXXX");
request.setStringProperty("destinationType", "FILTER");
_LOG.info(request.getText());
// Tell the producer to send the message
producer.send(request);
//How to get the expired message after producer.send(request)
return Response.status(Response.Status.ACCEPTED).build();
} catch (final Exception e) {
_LOG.error("We could not send the message", e);
return Response.status(Response.Status.BAD_REQUEST).build();
}
}*
默認情況下,如果消息過期並且消息不是持久的,它將被丟棄並且應用程序將無法獲取它。 如果它是您在 AMQ 中的持久設置,它將被移動到 DLQ
此處的詳細信息: 自動丟棄過期消息
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