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# Publicar mensajes SMS en un tema de Amazon SNS mediante un SDK AWS
<a name="example_sns_UsageSmsTopic_section"></a>

En el siguiente ejemplo de código, se muestra cómo:
+ Crear un tema de Amazon SNS
+ Suscribir números de teléfono al tema
+ Publique mensajes SMS en el tema para que todos los números de teléfono suscritos reciban el mensaje a la vez.

------
#### [ Java ]

**SDK para Java 2.x**  
 Hay más información al respecto GitHub. Busque el ejemplo completo y aprenda a configurar y ejecutar en el [Repositorio de ejemplos de código de AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/sns#code-examples). 
Cree un tema y devuelva su ARN.  

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sns.SnsClient;
import software.amazon.awssdk.services.sns.model.CreateTopicRequest;
import software.amazon.awssdk.services.sns.model.CreateTopicResponse;
import software.amazon.awssdk.services.sns.model.SnsException;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class CreateTopic {
    public static void main(String[] args) {
        final String usage = """

                Usage:    <topicName>

                Where:
                   topicName - The name of the topic to create (for example, mytopic).

                """;

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

        String topicName = args[0];
        System.out.println("Creating a topic with name: " + topicName);
        SnsClient snsClient = SnsClient.builder()
                .region(Region.US_EAST_1)
                .build();

        String arnVal = createSNSTopic(snsClient, topicName);
        System.out.println("The topic ARN is" + arnVal);
        snsClient.close();
    }

    public static String createSNSTopic(SnsClient snsClient, String topicName) {
        CreateTopicResponse result;
        try {
            CreateTopicRequest request = CreateTopicRequest.builder()
                    .name(topicName)
                    .build();

            result = snsClient.createTopic(request);
            return result.topicArn();

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
}
```
Suscriba un punto de enlace a un tema.  

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sns.SnsClient;
import software.amazon.awssdk.services.sns.model.SnsException;
import software.amazon.awssdk.services.sns.model.SubscribeRequest;
import software.amazon.awssdk.services.sns.model.SubscribeResponse;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class SubscribeTextSMS {
    public static void main(String[] args) {
        final String usage = """

                Usage:    <topicArn> <phoneNumber>

                Where:
                   topicArn - The ARN of the topic to subscribe.
                   phoneNumber - A mobile phone number that receives notifications (for example, +1XXX5550100).
                """;

        if (args.length < 2) {
            System.out.println(usage);
            System.exit(1);
        }

        String topicArn = args[0];
        String phoneNumber = args[1];
        SnsClient snsClient = SnsClient.builder()
                .region(Region.US_EAST_1)
                .build();

        subTextSNS(snsClient, topicArn, phoneNumber);
        snsClient.close();
    }

    public static void subTextSNS(SnsClient snsClient, String topicArn, String phoneNumber) {
        try {
            SubscribeRequest request = SubscribeRequest.builder()
                    .protocol("sms")
                    .endpoint(phoneNumber)
                    .returnSubscriptionArn(true)
                    .topicArn(topicArn)
                    .build();

            SubscribeResponse result = snsClient.subscribe(request);
            System.out.println("Subscription ARN: " + result.subscriptionArn() + "\n\n Status is "
                    + result.sdkHttpResponse().statusCode());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```
Establezca atributos en el mensaje, como el ID del remitente, el precio máximo y su tipo. Los atributos de mensaje son opcionales.  

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sns.SnsClient;
import software.amazon.awssdk.services.sns.model.SetSmsAttributesRequest;
import software.amazon.awssdk.services.sns.model.SetSmsAttributesResponse;
import software.amazon.awssdk.services.sns.model.SnsException;
import java.util.HashMap;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class SetSMSAttributes {
    public static void main(String[] args) {
        HashMap<String, String> attributes = new HashMap<>(1);
        attributes.put("DefaultSMSType", "Transactional");
        attributes.put("UsageReportS3Bucket", "janbucket");

        SnsClient snsClient = SnsClient.builder()
                .region(Region.US_EAST_1)
                .build();
        setSNSAttributes(snsClient, attributes);
        snsClient.close();
    }

    public static void setSNSAttributes(SnsClient snsClient, HashMap<String, String> attributes) {
        try {
            SetSmsAttributesRequest request = SetSmsAttributesRequest.builder()
                    .attributes(attributes)
                    .build();

            SetSmsAttributesResponse result = snsClient.setSMSAttributes(request);
            System.out.println("Set default Attributes to " + attributes + ". Status was "
                    + result.sdkHttpResponse().statusCode());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```
Publique un mensaje en un tema. El mensaje se envía a cada suscriptor.  

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sns.SnsClient;
import software.amazon.awssdk.services.sns.model.PublishRequest;
import software.amazon.awssdk.services.sns.model.PublishResponse;
import software.amazon.awssdk.services.sns.model.SnsException;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class PublishTextSMS {
    public static void main(String[] args) {
        final String usage = """

                Usage:    <message> <phoneNumber>

                Where:
                   message - The message text to send.
                   phoneNumber - The mobile phone number to which a message is sent (for example, +1XXX5550100).\s
                """;

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

        String message = args[0];
        String phoneNumber = args[1];
        SnsClient snsClient = SnsClient.builder()
                .region(Region.US_EAST_1)
                .build();
        pubTextSMS(snsClient, message, phoneNumber);
        snsClient.close();
    }

    public static void pubTextSMS(SnsClient snsClient, String message, String phoneNumber) {
        try {
            PublishRequest request = PublishRequest.builder()
                    .message(message)
                    .phoneNumber(phoneNumber)
                    .build();

            PublishResponse result = snsClient.publish(request);
            System.out
                    .println(result.messageId() + " Message sent. Status was " + result.sdkHttpResponse().statusCode());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```

------

Para obtener una lista completa de guías para desarrolladores del AWS SDK y ejemplos de código, consulte[Uso de Amazon SNS con un SDK AWS](sdk-general-information-section.md). En este tema también se incluye información sobre cómo comenzar a utilizar el SDK y detalles sobre sus versiones anteriores.