Java Code Examples for com.amazonaws.services.sqs.AmazonSQSClientBuilder#defaultClient()

public static void changeMessageVisibilityMultiple(
        String queue_url, int timeout)
{
    AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

    List<ChangeMessageVisibilityBatchRequestEntry> entries =
        new ArrayList<ChangeMessageVisibilityBatchRequestEntry>();

    entries.add(new ChangeMessageVisibilityBatchRequestEntry(
                "unique_id_msg1",
                sqs.receiveMessage(queue_url)
                   .getMessages()
                   .get(0)
                   .getReceiptHandle())
            .withVisibilityTimeout(timeout));

    entries.add(new ChangeMessageVisibilityBatchRequestEntry(
                "unique_id_msg2",
                sqs.receiveMessage(queue_url)
                   .getMessages()
                   .get(0)
                   .getReceiptHandle())
            .withVisibilityTimeout(timeout + 200));

    sqs.changeMessageVisibilityBatch(queue_url, entries);
}
 

public static void changeMessageVisibilitySingle(
        String queue_url, int timeout)
{
    AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

    // Get the receipt handle for the first message in the queue.
    String receipt = sqs.receiveMessage(queue_url)
                        .getMessages()
                        .get(0)
                        .getReceiptHandle();

    sqs.changeMessageVisibility(queue_url, receipt, timeout);
}
 

public static void main(String[] args)
{
    final String queue_name = "testQueue" + new Date().getTime();
    AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

    // first, create a queue (unless it exists already)
    try {
        CreateQueueResult cq_result = sqs.createQueue(queue_name);
    } catch (AmazonSQSException e) {
        if (!e.getErrorCode().equals("QueueAlreadyExists")) {
            throw e;
        }
    }

    final String queue_url = sqs.getQueueUrl(queue_name).getQueueUrl();

    // Send some messages to the queue
    for (int i = 0; i < 20; i++) {
        sqs.sendMessage(queue_url, "This is message " + i);
    }

    // change visibility timeout (single)
    changeMessageVisibilitySingle(queue_url, 60 * 60); //1 hour

    // change visibility timeout (multiple)
    changeMessageVisibilityMultiple(queue_url, 30 * 60 ); //30 minutes
}
 

public static void main(String[] args)
{
    final AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

    try {
        CreateQueueResult create_result = sqs.createQueue(QUEUE_NAME);
    } catch (AmazonSQSException e) {
        if (!e.getErrorCode().equals("QueueAlreadyExists")) {
            throw e;
        }
    }

    String queueUrl = sqs.getQueueUrl(QUEUE_NAME).getQueueUrl();

    SendMessageRequest send_msg_request = new SendMessageRequest()
            .withQueueUrl(queueUrl)
            .withMessageBody("hello world")
            .withDelaySeconds(5);
    sqs.sendMessage(send_msg_request);


    // Send multiple messages to the queue
    SendMessageBatchRequest send_batch_request = new SendMessageBatchRequest()
            .withQueueUrl(queueUrl)
            .withEntries(
                    new SendMessageBatchRequestEntry(
                            "msg_1", "Hello from message 1"),
                    new SendMessageBatchRequestEntry(
                            "msg_2", "Hello from message 2")
                            .withDelaySeconds(10));
    sqs.sendMessageBatch(send_batch_request);

    // receive messages from the queue
    List<Message> messages = sqs.receiveMessage(queueUrl).getMessages();

    // delete messages from the queue
    for (Message m : messages) {
        sqs.deleteMessage(queueUrl, m.getReceiptHandle());
    }
}
 

@Before
public void setupSQSClient() {
    sqs = AmazonSQSClientBuilder.defaultClient();
}
 

public static void main(String[] args)  throws Exception{


        sqs = AmazonSQSClientBuilder.defaultClient();
        rek = AmazonRekognitionClientBuilder.defaultClient();
        
        //Change active start function for the desired analysis. Also change the GetResults function later in this code.
        //=================================================
        StartLabels(bucket, video);
        //StartFaces(bucket,video);
        //StartFaceSearchCollection(bucket,video);
        //StartPersons(bucket,video);
        //StartCelebrities(bucket,video);
        //StartModerationLabels(bucket,video);
        //=================================================
        System.out.println("Waiting for job: " + startJobId);
        //Poll queue for messages
        List<Message> messages=null;
        int dotLine=0;
        boolean jobFound=false;

        //loop until the job status is published. Ignore other messages in queue.
        do{
            messages = sqs.receiveMessage(queueUrl).getMessages();
            if (dotLine++<20){
                System.out.print(".");
            }else{
                System.out.println();
                dotLine=0;
            }

            if (!messages.isEmpty()) {
                //Loop through messages received.
                for (Message message: messages) {
                    String notification = message.getBody();

                    // Get status and job id from notification.
                    ObjectMapper mapper = new ObjectMapper();
                    JsonNode jsonMessageTree = mapper.readTree(notification);
                    JsonNode messageBodyText = jsonMessageTree.get("Message");
                    ObjectMapper operationResultMapper = new ObjectMapper();
                    JsonNode jsonResultTree = operationResultMapper.readTree(messageBodyText.textValue());
                    JsonNode operationJobId = jsonResultTree.get("JobId");
                    JsonNode operationStatus = jsonResultTree.get("Status");
                    System.out.println("Job found was " + operationJobId);
                    // Found job. Get the results and display.
                    if(operationJobId.asText().equals(startJobId)){
                        jobFound=true;
                        System.out.println("Job id: " + operationJobId );
                        System.out.println("Status : " + operationStatus.toString());
                        if (operationStatus.asText().equals("SUCCEEDED")){
                            //Change to match the start function earlier in this code.
                            //============================================
                            GetResultsLabels();
                            //GetResultsFaces();
                            //GetResultsFaceSearchCollection();
                            //GetResultsPersons();
                            //GetResultsCelebrities();
                            //GetResultsModerationLabels();
                            //============================================
                        }
                        else{
                            System.out.println("Video analysis failed");
                        }

                        sqs.deleteMessage(queueUrl,message.getReceiptHandle());
                    }

                    else{
                        System.out.println("Job received was not job " +  startJobId);
                        //Delete unknown message. Consider moving message to dead letter queue
                        sqs.deleteMessage(queueUrl,message.getReceiptHandle());
                    }
                }
            }
        } while (!jobFound);


        System.out.println("Done!");
    }
 

public static void main(String[] args)
{
    final String USAGE =
       "To run this example, supply the name of a queue to create and\n" +
       "queue url of an existing queue.\n\n" +
       "Ex: LongPolling <unique-queue-name> <existing-queue-url>\n";

    if (args.length != 2) {
        System.out.println(USAGE);
        System.exit(1);
    }

    String queue_name = args[0];
    String queue_url = args[1];

    final AmazonSQS sqs = AmazonSQSClientBuilder.defaultClient();

    // Enable long polling when creating a queue
    CreateQueueRequest create_request = new CreateQueueRequest()
            .withQueueName(queue_name)
            .addAttributesEntry("ReceiveMessageWaitTimeSeconds", "20");

    try {
        sqs.createQueue(create_request);
    } catch (AmazonSQSException e) {
        if (!e.getErrorCode().equals("QueueAlreadyExists")) {
            throw e;
        }
    }

    // Enable long polling on an existing queue
    SetQueueAttributesRequest set_attrs_request = new SetQueueAttributesRequest()
            .withQueueUrl(queue_url)
            .addAttributesEntry("ReceiveMessageWaitTimeSeconds", "20");
    sqs.setQueueAttributes(set_attrs_request);

    // Enable long polling on a message receipt
    ReceiveMessageRequest receive_request = new ReceiveMessageRequest()
            .withQueueUrl(queue_url)
            .withWaitTimeSeconds(20);
    sqs.receiveMessage(receive_request);
}