Java
SQS Receive Message

Retrieves one or more messages from an Amazon SQS queue, with a maximum limit of 10 messages, from the specified queue.
See SQS ReceiveMessage or detailed information.
Chilkat Java Downloads

Java
import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRest rest = new CkRest();

    // Connect to the Amazon AWS REST server.
    // such as https://sqs.us-west-2.amazonaws.com/
    boolean bTls = true;
    int port = 443;
    boolean bAutoReconnect = true;
    success = rest.Connect("sqs.us-west-2.amazonaws.com",port,bTls,bAutoReconnect);

    // Provide AWS credentials for the REST call.
    CkAuthAws authAws = new CkAuthAws();
    authAws.put_AccessKey("AWS_ACCESS_KEY");
    authAws.put_SecretKey("AWS_SECRET_KEY");
    // the region should match our URL above..
    authAws.put_Region("us-west-2");
    authAws.put_ServiceName("sqs");

    rest.SetAuthAws(authAws);

    rest.AddQueryParam("Action","ReceiveMessage");
    rest.AddQueryParam("MaxNumberOfMessages","5");
    rest.AddQueryParam("VisibilityTimeout","15");
    rest.AddQueryParam("AttributeName","All");
    rest.AddQueryParam("MessageAttributeName","All");

    // Use the actual path part of your SQS queue URL here:
    String responseXml = rest.fullRequestNoBody("GET","/123456789123/chilkatTest");
    if (rest.get_LastMethodSuccess() != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        System.out.println("response status code = " + rest.get_ResponseStatusCode());
        System.out.println("response status text = " + rest.responseStatusText());
        System.out.println("response header: " + rest.responseHeader());
        System.out.println("response body: " + responseXml);
        return;
        }

    // Examine the successful XML response.
    CkXml xml = new CkXml();
    xml.LoadXml(responseXml);
    System.out.println(xml.getXml());
    System.out.println("----");

    // A successful response looks like this:
    // <?xml version="1.0" encoding="utf-8" ?>
    // <ReceiveMessageResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/">
    //     <ReceiveMessageResult>
    //         <Message>
    //             <Body>this is a test</Body>
    //             <MD5OfBody>54b0c58c7ce9f2a8b551351102ee0938</MD5OfBody>
    //             <ReceiptHandle>AQEBMyLof...UbKBTvHtEg==</ReceiptHandle>
    //             <Attribute>
    //                 <Name>SenderId</Name>
    //                 <Value>957491831129</Value>
    //             </Attribute>
    //             <Attribute>
    //                 <Name>ApproximateFirstReceiveTimestamp</Name>
    //                 <Value>1475013283557</Value>
    //             </Attribute>
    //             <Attribute>
    //                 <Name>ApproximateReceiveCount</Name>
    //                 <Value>4</Value>
    //             </Attribute>
    //             <Attribute>
    //                 <Name>SentTimestamp</Name>
    //                 <Value>1475013283557</Value>
    //             </Attribute>
    //             <MessageId>52882c65-5e21-4450-9024-93a3b01e61d3</MessageId>
    //             <MD5OfMessageAttributes>2ff68603f4239272bd03f543254ed040</MD5OfMessageAttributes>
    //         </Message>
    //     </ReceiveMessageResult>
    //     <ResponseMetadata>
    //         <RequestId>05ba5c92-80ee-5f87-be76-0cf67b7475d6</RequestId>
    //     </ResponseMetadata>
    // </ReceiveMessageResponse>

    // Get some values from the XML:
    System.out.println("Body: " + xml.chilkatPath("ReceiveMessageResult|Message|Body|*"));
    System.out.println("MessageId: " + xml.chilkatPath("ReceiveMessageResult|Message|MessageId|*"));

    String unused = xml.chilkatPath("ReceiveMessageResult|Message[0]|Attribute|$");

    CkXml rec = xml.FindNextRecord("Name","SenderId");
    System.out.println("SenderId: " + rec.getChildContent("Value"));

    rec = xml.FindNextRecord("Name","ApproximateFirstReceiveTimestamp");
    System.out.println("ApproximateFirstReceiveTimestamp: " + rec.getChildContent("Value"));

    rec = xml.FindNextRecord("Name","ApproximateReceiveCount");
    System.out.println("ApproximateReceiveCount: " + rec.getChildContent("Value"));

    rec = xml.FindNextRecord("Name","SentTimestamp");
    System.out.println("SentTimestamp: " + rec.getChildContent("Value"));

    xml.GetRoot2();
  }
}