This topic describes how to use the following Java sample code to receive messages:
public class ConsumerDemo {
public static void main(String[] args) {
CloudAccount account = new CloudAccount("YourAccessId", "YourAccessKey", "MNSEndpoint");
// Initialize the client.
MNSClient client = account.getMNSClient();
// Receive 10 messages from a queue.
try{
CloudQueue queue = client.getQueueRef("TestQueue");
for (int i = 0; i < 10; i++)
{
Message popMsg = queue.popMessage();
if (popMsg ! = null){
System.out.println("message handle: " + popMsg.getReceiptHandle());
// Base64 decoding is performed by default.
System.out.println("message body: " + popMsg.getMessageBodyAsString());
// The original message body that is not decoded.
System.out.println("message body: " + popMsg.getMessageBodyAsRawString ());
System.out.println("message id: " + popMsg.getMessageId());
System.out.println("message dequeue count:" + popMsg.getDequeueCount());
// Delete received messages.
queue.deleteMessage(popMsg.getReceiptHandle());
System.out.println("delete message successfully.\n");
}
else{
System.out.println("message not exist in TestQueue.\n");
}
}
} catch (ClientException ce)
{
System.out.println("Something wrong with the network connection between client and MNS service."
+ "Please check your network and DNS availablity.");
ce.printStackTrace();
} catch (ServiceException se)
{
se.printStackTrace();
logger.error("MNS exception requestId:" + se.getRequestId(), se);
if (se.getErrorCode() ! = null) {
if (se.getErrorCode().equals("QueueNotExist"))
{
System.out.println("Queue is not exist.Please create before use");
} else if (se.getErrorCode().equals("TimeExpired"))
{
System.out.println("The request is time expired. Please check your local machine timeclock");
}
// For more information about error codes, see Error codes.
}
} catch (Exception e)
{
System.out.println("Unknown exception happened!") ;
e.printStackTrace();
}
client.close();
}
}