Amazon-SNS-Beispiele unter Verwendung von SDK für C++

Die folgenden Codebeispiele zeigen, wie Sie Aktionen durchführen und gängige Szenarien implementieren, indem Sie AWS SDK für C++ mit Amazon SNS nutzen.

Aktionen sind Codeauszüge aus größeren Programmen und müssen im Kontext ausgeführt werden. Während Aktionen Ihnen zeigen, wie Sie einzelne Servicefunktionen aufrufen, können Sie Aktionen im Kontext der zugehörigen Szenarien anzeigen.

Szenarien sind Codebeispiele, die Ihnen zeigen, wie Sie bestimmte Aufgaben ausführen, indem Sie mehrere Funktionen innerhalb eines Services aufrufen oder mit anderen AWS-Services kombinieren.

Jedes Beispiel enthält einen Link zum vollständigen Quellcode, wo Sie Anweisungen zum Einrichten und Ausführen des Codes im Kodex finden.

Erste Schritte

Die folgenden Codebeispiele zeigen, wie Sie mit der Verwendung von Amazon SNS beginnen.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.

Code für die CMake-Datei „CMakeLists.txt“.


# Set the minimum required version of CMake for this project.
cmake_minimum_required(VERSION 3.13)

# Set the AWS service components used by this project.
set(SERVICE_COMPONENTS sns)

# Set this project's name.
project("hello_sns")

# Set the C++ standard to use to build this target.
# At least C++ 11 is required for the AWS SDK for C++.
set(CMAKE_CXX_STANDARD 11)

# Use the MSVC variable to determine if this is a Windows build.
set(WINDOWS_BUILD ${MSVC})

if (WINDOWS_BUILD) # Set the location where CMake can find the installed libraries for the AWS SDK.
    string(REPLACE ";" "/aws-cpp-sdk-all;" SYSTEM_MODULE_PATH "${CMAKE_SYSTEM_PREFIX_PATH}/aws-cpp-sdk-all")
    list(APPEND CMAKE_PREFIX_PATH ${SYSTEM_MODULE_PATH})
endif ()

# Find the AWS SDK for C++ package.
find_package(AWSSDK REQUIRED COMPONENTS ${SERVICE_COMPONENTS})

if (WINDOWS_BUILD AND AWSSDK_INSTALL_AS_SHARED_LIBS)
    # Copy relevant AWS SDK for C++ libraries into the current binary directory for running and debugging.

    # set(BIN_SUB_DIR "/Debug") # If you are building from the command line you may need to uncomment this
    # and set the proper subdirectory to the executables' location.

    AWSSDK_CPY_DYN_LIBS(SERVICE_COMPONENTS "" ${CMAKE_CURRENT_BINARY_DIR}${BIN_SUB_DIR})
endif ()

add_executable(${PROJECT_NAME}
        hello_sns.cpp)

target_link_libraries(${PROJECT_NAME}
        ${AWSSDK_LINK_LIBRARIES})

Code für die Quelldatei „hello_sns.cpp“.


#include <aws/core/Aws.h>
#include <aws/sns/SNSClient.h>
#include <aws/sns/model/ListTopicsRequest.h>
#include <iostream>

/*
 *  A "Hello SNS" starter application which initializes an Amazon Simple Notification
 *  Service (Amazon SNS) client and lists the SNS topics in the current account.
 *
 *  main function
 *
 *  Usage: 'hello_sns'
 *
 */

int main(int argc, char **argv) {
    Aws::SDKOptions options;
    // Optionally change the log level for debugging.
//   options.loggingOptions.logLevel = Utils::Logging::LogLevel::Debug;
    Aws::InitAPI(options); // Should only be called once.
    {
        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

        Aws::SNS::SNSClient snsClient(clientConfig);

        Aws::Vector<Aws::SNS::Model::Topic> allTopics;
        Aws::String nextToken; // Next token is used to handle a paginated response.
        do {
            Aws::SNS::Model::ListTopicsRequest request;

            if (!nextToken.empty()) {
                request.SetNextToken(nextToken);
            }

            const Aws::SNS::Model::ListTopicsOutcome outcome = snsClient.ListTopics(
                    request);

            if (outcome.IsSuccess()) {
                const Aws::Vector<Aws::SNS::Model::Topic> &paginatedTopics =
                        outcome.GetResult().GetTopics();
                if (!paginatedTopics.empty()) {
                    allTopics.insert(allTopics.cend(), paginatedTopics.cbegin(),
                                     paginatedTopics.cend());
                }
            }
            else {
                std::cerr << "Error listing topics " << outcome.GetError().GetMessage()
                          << std::endl;
                return 1;
            }

            nextToken = outcome.GetResult().GetNextToken();
        } while (!nextToken.empty());

        std::cout << "Hello Amazon SNS! You have " << allTopics.size() << " topic"
                  << (allTopics.size() == 1 ? "" : "s") << " in your account."
                  << std::endl;

        if (!allTopics.empty()) {
            std::cout << "Here are your topic ARNs." << std::endl;
            for (const Aws::SNS::Model::Topic &topic: allTopics) {
                std::cout << "  * " << topic.GetTopicArn() << std::endl;
            }
        }
    }


    Aws::ShutdownAPI(options); // Should only be called once.
    return 0;
}

Weitere API-Informationen finden Sie unter ListTopics in der AWS SDK für C++-API-Referenz.

Aktionen

Die folgenden Codebeispiele zeigen, wie CreateTopic verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Create an Amazon Simple Notification Service (Amazon SNS) topic.
/*!
  \param topicName: An Amazon SNS topic name.
  \param topicARNResult: String to return the Amazon Resource Name (ARN) for the topic.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::createTopic(const Aws::String &topicName,
                              Aws::String &topicARNResult,
                              const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::CreateTopicRequest request;
    request.SetName(topicName);

    const Aws::SNS::Model::CreateTopicOutcome outcome = snsClient.CreateTopic(request);

    if (outcome.IsSuccess()) {
        topicARNResult = outcome.GetResult().GetTopicArn();
        std::cout << "Successfully created an Amazon SNS topic " << topicName
                  << " with topic ARN '" << topicARNResult
                  << "'." << std::endl;

    }
    else {
        std::cerr << "Error creating topic " << topicName << ":" <<
                  outcome.GetError().GetMessage() << std::endl;
        topicARNResult.clear();
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter CreateTopic in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie DeleteTopic verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Delete an Amazon Simple Notification Service (Amazon SNS) topic.
/*!
  \param topicARN: The Amazon Resource Name (ARN) for an Amazon SNS topic.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::deleteTopic(const Aws::String &topicARN,
                              const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::DeleteTopicRequest request;
    request.SetTopicArn(topicARN);

    const Aws::SNS::Model::DeleteTopicOutcome outcome = snsClient.DeleteTopic(request);

    if (outcome.IsSuccess()) {
        std::cout << "Successfully deleted the Amazon SNS topic " << topicARN << std::endl;
    }
    else {
        std::cerr << "Error deleting topic " << topicARN << ":" <<
                  outcome.GetError().GetMessage() << std::endl;
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter DeleteTopic in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie GetSMSAttributes verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Retrieve the default settings for sending SMS messages from your AWS account by using
//! Amazon Simple Notification Service (Amazon SNS).
/*!
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool
AwsDoc::SNS::getSMSType(const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::GetSMSAttributesRequest request;
    //Set the request to only retrieve the DefaultSMSType setting.
    //Without the following line, GetSMSAttributes would retrieve all settings.
    request.AddAttributes("DefaultSMSType");

    const Aws::SNS::Model::GetSMSAttributesOutcome outcome = snsClient.GetSMSAttributes(
            request);

    if (outcome.IsSuccess()) {
        const Aws::Map<Aws::String, Aws::String> attributes =
                outcome.GetResult().GetAttributes();
        if (!attributes.empty()) {
            for (auto const &att: attributes) {
                std::cout << att.first << ":  " << att.second << std::endl;
            }
        }
        else {
            std::cout
                    << "AwsDoc::SNS::getSMSType - an empty map of attributes was retrieved."
                    << std::endl;
        }
    }
    else {
        std::cerr << "Error while getting SMS Type: '"
                  << outcome.GetError().GetMessage()
                  << "'" << std::endl;
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter GetSMSAttributes in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie GetTopicAttributes verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Retrieve the properties of an Amazon Simple Notification Service (Amazon SNS) topic.
/*!
  \param topicARN: The Amazon Resource Name (ARN) for an Amazon SNS topic.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::getTopicAttributes(const Aws::String &topicARN,
                                     const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);
    Aws::SNS::Model::GetTopicAttributesRequest request;
    request.SetTopicArn(topicARN);

    const Aws::SNS::Model::GetTopicAttributesOutcome outcome = snsClient.GetTopicAttributes(
            request);

    if (outcome.IsSuccess()) {
        std::cout << "Topic Attributes:" << std::endl;
        for (auto const &attribute: outcome.GetResult().GetAttributes()) {
            std::cout << "  * " << attribute.first << " : " << attribute.second
                      << std::endl;
        }
    }
    else {
        std::cerr << "Error while getting Topic attributes "
                  << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter GetTopicAttributes in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie ListSubscriptions verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Retrieve a list of Amazon Simple Notification Service (Amazon SNS) subscriptions.
/*!
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::listSubscriptions(
        const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::String nextToken; // Next token is used to handle a paginated response.
    bool result = true;
    Aws::Vector<Aws::SNS::Model::Subscription> subscriptions;
    do {
        Aws::SNS::Model::ListSubscriptionsRequest request;

        if (!nextToken.empty()) {
            request.SetNextToken(nextToken);
        }

        const Aws::SNS::Model::ListSubscriptionsOutcome outcome = snsClient.ListSubscriptions(
                request);

        if (outcome.IsSuccess()) {
            const Aws::Vector<Aws::SNS::Model::Subscription> &newSubscriptions =
                    outcome.GetResult().GetSubscriptions();
            subscriptions.insert(subscriptions.cend(), newSubscriptions.begin(),
                                 newSubscriptions.end());
        }
        else {
            std::cerr << "Error listing subscriptions "
                      << outcome.GetError().GetMessage()
                      <<
                      std::endl;
            result = false;
            break;
        }

        nextToken = outcome.GetResult().GetNextToken();
    } while (!nextToken.empty());

    if (result) {
        if (subscriptions.empty()) {
            std::cout << "No subscriptions found" << std::endl;
        }
        else {
            std::cout << "Subscriptions list:" << std::endl;
            for (auto const &subscription: subscriptions) {
                std::cout << "  * " << subscription.GetSubscriptionArn() << std::endl;
            }
        }
    }
    return result;
}

Weitere API-Informationen finden Sie unter ListSubscriptions in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie ListTopics verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Retrieve a list of Amazon Simple Notification Service (Amazon SNS) topics.
/*!
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool
AwsDoc::SNS::listTopics(const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::String nextToken; // Next token is used to handle a paginated response.
    bool result = true;
    do {
        Aws::SNS::Model::ListTopicsRequest request;

        if (!nextToken.empty()) {
            request.SetNextToken(nextToken);
        }

        const Aws::SNS::Model::ListTopicsOutcome outcome = snsClient.ListTopics(
                request);

        if (outcome.IsSuccess()) {
            std::cout << "Topics list:" << std::endl;
            for (auto const &topic: outcome.GetResult().GetTopics()) {
                std::cout << "  * " << topic.GetTopicArn() << std::endl;
            }
        }
        else {
            std::cerr << "Error listing topics " << outcome.GetError().GetMessage() <<
                      std::endl;
            result = false;
            break;
        }

        nextToken = outcome.GetResult().GetNextToken();
    } while (!nextToken.empty());

    return result;
}

Weitere API-Informationen finden Sie unter ListTopics in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie Publish verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Send a message to an Amazon Simple Notification Service (Amazon SNS) topic.
/*!
  \param message: The message to publish.
  \param topicARN: The Amazon Resource Name (ARN) for an Amazon SNS topic.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::publishToTopic(const Aws::String &message,
                                 const Aws::String &topicARN,
                                 const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::PublishRequest request;
    request.SetMessage(message);
    request.SetTopicArn(topicARN);

    const Aws::SNS::Model::PublishOutcome outcome = snsClient.Publish(request);

    if (outcome.IsSuccess()) {
        std::cout << "Message published successfully with id '"
                  << outcome.GetResult().GetMessageId() << "'." << std::endl;
    }
    else {
        std::cerr << "Error while publishing message "
                  << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Veröffentlichen Sie eine Nachricht mit einem Attribut.


        static const Aws::String TONE_ATTRIBUTE("tone");
        static const Aws::Vector<Aws::String> TONES = {"cheerful", "funny", "serious",
                                                       "sincere"};

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::SNS::SNSClient snsClient(clientConfiguration);

        Aws::SNS::Model::PublishRequest request;
        request.SetTopicArn(topicARN);
        Aws::String message = askQuestion("Enter a message text to publish.  ");
        request.SetMessage(message);

        if (filteringMessages && askYesNoQuestion(
                "Add an attribute to this message? (y/n) ")) {
            for (size_t i = 0; i < TONES.size(); ++i) {
                std::cout << "  " << (i + 1) << ". " << TONES[i] << std::endl;
            }
            int selection = askQuestionForIntRange(
                    "Enter a number for an attribute. ",
                    1, static_cast<int>(TONES.size()));
            Aws::SNS::Model::MessageAttributeValue messageAttributeValue;
            messageAttributeValue.SetDataType("String");
            messageAttributeValue.SetStringValue(TONES[selection - 1]);
            request.AddMessageAttributes(TONE_ATTRIBUTE, messageAttributeValue);
        }

        Aws::SNS::Model::PublishOutcome outcome = snsClient.Publish(request);

        if (outcome.IsSuccess()) {
            std::cout << "Your message was successfully published." << std::endl;
        }
        else {
            std::cerr << "Error with TopicsAndQueues::Publish. "
                      << outcome.GetError().GetMessage()
                      << std::endl;

            cleanUp(topicARN,
                    queueURLS,
                    subscriptionARNS,
                    snsClient,
                    sqsClient);

            return false;
        }

Weitere API-Informationen finden Sie unter Veröffentlichen in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie SetSMSAttributes verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.

So verwenden Sie Amazon SNS zum Festlegen des DefaultSMSType-Attributs.


//! Set the default settings for sending SMS messages.
/*!
  \param smsType: The type of SMS message that you will send by default.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::setSMSType(const Aws::String &smsType,
                             const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::SetSMSAttributesRequest request;
    request.AddAttributes("DefaultSMSType", smsType);

    const Aws::SNS::Model::SetSMSAttributesOutcome outcome = snsClient.SetSMSAttributes(
            request);

    if (outcome.IsSuccess()) {
        std::cout << "SMS Type set successfully " << std::endl;
    }
    else {
        std::cerr << "Error while setting SMS Type: '"
                  << outcome.GetError().GetMessage()
                  << "'" << std::endl;
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter SetSMSAttributes in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie Subscribe verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.

Abonnieren Sie eine E-Mail-Adresse für ein Thema.


//! Subscribe to an Amazon Simple Notification Service (Amazon SNS) topic with delivery to an email address.
/*!
  \param topicARN: An SNS topic Amazon Resource Name (ARN).
  \param emailAddress: An email address.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::subscribeEmail(const Aws::String &topicARN,
                                 const Aws::String &emailAddress,
                                 const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::SubscribeRequest request;
    request.SetTopicArn(topicARN);
    request.SetProtocol("email");
    request.SetEndpoint(emailAddress);

    const Aws::SNS::Model::SubscribeOutcome outcome = snsClient.Subscribe(request);

    if (outcome.IsSuccess()) {
        std::cout << "Subscribed successfully." << std::endl;
        std::cout << "Subscription ARN '" << outcome.GetResult().GetSubscriptionArn()
                  << "'." << std::endl;
    }
    else {
        std::cerr << "Error while subscribing " << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Abonnieren Sie eine mobile Anwendung für ein Thema.


//! Subscribe to an Amazon Simple Notification Service (Amazon SNS) topic with delivery to a mobile app.
/*!
  \param topicARN: The Amazon Resource Name (ARN) for an Amazon SNS topic.
  \param endpointARN: The ARN for a mobile app or device endpoint.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool
AwsDoc::SNS::subscribeApp(const Aws::String &topicARN,
                          const Aws::String &endpointARN,
                          const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::SubscribeRequest request;
    request.SetTopicArn(topicARN);
    request.SetProtocol("application");
    request.SetEndpoint(endpointARN);

    const Aws::SNS::Model::SubscribeOutcome outcome = snsClient.Subscribe(request);

    if (outcome.IsSuccess()) {
        std::cout << "Subscribed successfully." << std::endl;
        std::cout << "Subscription ARN '" << outcome.GetResult().GetSubscriptionArn()
                  << "'." << std::endl;
    }
    else {
        std::cerr << "Error while subscribing " << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Abonnieren Sie eine Lambda-Funktion für ein Thema.



//! Subscribe to an Amazon Simple Notification Service (Amazon SNS) topic with delivery to an AWS Lambda function.
/*!
  \param topicARN: The Amazon Resource Name (ARN) for an Amazon SNS topic.
  \param lambdaFunctionARN: The ARN for an AWS Lambda function.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::subscribeLambda(const Aws::String &topicARN,
                                  const Aws::String &lambdaFunctionARN,
                                  const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::SubscribeRequest request;
    request.SetTopicArn(topicARN);
    request.SetProtocol("lambda");
    request.SetEndpoint(lambdaFunctionARN);

    const Aws::SNS::Model::SubscribeOutcome outcome = snsClient.Subscribe(request);

    if (outcome.IsSuccess()) {
        std::cout << "Subscribed successfully." << std::endl;
        std::cout << "Subscription ARN '" << outcome.GetResult().GetSubscriptionArn()
                  << "'." << std::endl;
    }
    else {
        std::cerr << "Error while subscribing " << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Abonnieren Sie eine SQS-Warteschlange für ein Thema.


        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::SNS::SNSClient snsClient(clientConfiguration);

            Aws::SNS::Model::SubscribeRequest request;
            request.SetTopicArn(topicARN);
            request.SetProtocol("sqs");
            request.SetEndpoint(queueARN);

            Aws::SNS::Model::SubscribeOutcome outcome = snsClient.Subscribe(request);

            if (outcome.IsSuccess()) {
                Aws::String subscriptionARN = outcome.GetResult().GetSubscriptionArn();
                std::cout << "The queue '" << queueName
                          << "' has been subscribed to the topic '"
                          << "'" << topicName << "'" << std::endl;
                std::cout << "with the subscription ARN '" << subscriptionARN << "."
                          << std::endl;
                subscriptionARNS.push_back(subscriptionARN);
            }
            else {
                std::cerr << "Error with TopicsAndQueues::Subscribe. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }

Abonnieren Sie ein Thema mit einem Filter.


        static const Aws::String TONE_ATTRIBUTE("tone");
        static const Aws::Vector<Aws::String> TONES = {"cheerful", "funny", "serious",
                                                       "sincere"};

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::SNS::SNSClient snsClient(clientConfiguration);

            Aws::SNS::Model::SubscribeRequest request;
            request.SetTopicArn(topicARN);
            request.SetProtocol("sqs");
            request.SetEndpoint(queueARN);
            if (isFifoTopic) {
                if (first) {
                    std::cout << "Subscriptions to a FIFO topic can have filters."
                              << std::endl;
                    std::cout
                            << "If you add a filter to this subscription, then only the filtered messages "
                            << "will be received in the queue." << std::endl;
                    std::cout << "For information about message filtering, "
                              << "see https://docs.aws.amazon.com/sns/latest/dg/sns-message-filtering.html"
                              << std::endl;
                    std::cout << "For this example, you can filter messages by a \""
                              << TONE_ATTRIBUTE << "\" attribute." << std::endl;
                }

                std::ostringstream ostringstream;
                ostringstream << "Filter messages for \"" << queueName
                              << "\"'s subscription to the topic \""
                              << topicName << "\"?  (y/n)";

                // Add filter if user answers yes.
                if (askYesNoQuestion(ostringstream.str())) {
                    Aws::String jsonPolicy = getFilterPolicyFromUser();
                    if (!jsonPolicy.empty()) {
                        filteringMessages = true;

                        std::cout << "This is the filter policy for this subscription."
                                  << std::endl;
                        std::cout << jsonPolicy << std::endl;

                        request.AddAttributes("FilterPolicy", jsonPolicy);
                    }
                    else {
                        std::cout
                                << "Because you did not select any attributes, no filter "
                                << "will be added to this subscription." << std::endl;
                    }
                }
            }  // if (isFifoTopic)
            Aws::SNS::Model::SubscribeOutcome outcome = snsClient.Subscribe(request);

            if (outcome.IsSuccess()) {
                Aws::String subscriptionARN = outcome.GetResult().GetSubscriptionArn();
                std::cout << "The queue '" << queueName
                          << "' has been subscribed to the topic '"
                          << "'" << topicName << "'" << std::endl;
                std::cout << "with the subscription ARN '" << subscriptionARN << "."
                          << std::endl;
                subscriptionARNS.push_back(subscriptionARN);
            }
            else {
                std::cerr << "Error with TopicsAndQueues::Subscribe. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }

//! Routine that lets the user select attributes for a subscription filter policy.
/*!
 \sa getFilterPolicyFromUser()
 \return Aws::String: The filter policy as JSON.
 */
Aws::String AwsDoc::TopicsAndQueues::getFilterPolicyFromUser() {
    std::cout
            << "You can filter messages by one or more of the following \""
            << TONE_ATTRIBUTE << "\" attributes." << std::endl;

    std::vector<Aws::String> filterSelections;
    int selection;
    do {
        for (size_t j = 0; j < TONES.size(); ++j) {
            std::cout << "  " << (j + 1) << ". " << TONES[j]
                      << std::endl;
        }
        selection = askQuestionForIntRange(
                "Enter a number (or enter zero to stop adding more). ",
                0, static_cast<int>(TONES.size()));

        if (selection != 0) {
            const Aws::String &selectedTone(TONES[selection - 1]);
            // Add the tone to the selection if it is not already added.
            if (std::find(filterSelections.begin(),
                          filterSelections.end(),
                          selectedTone)
                == filterSelections.end()) {
                filterSelections.push_back(selectedTone);
            }
        }
    } while (selection != 0);

    Aws::String result;
    if (!filterSelections.empty()) {
        std::ostringstream jsonPolicyStream;
        jsonPolicyStream << "{ \"" << TONE_ATTRIBUTE << "\": [";


        for (size_t j = 0; j < filterSelections.size(); ++j) {
            jsonPolicyStream << "\"" << filterSelections[j] << "\"";
            if (j < filterSelections.size() - 1) {
                jsonPolicyStream << ",";
            }
        }
        jsonPolicyStream << "] }";

        result = jsonPolicyStream.str();
    }

    return result;
}

Weitere API-Informationen finden Sie unter Abonnieren in der AWS SDK für C++-API-Referenz.

Die folgenden Codebeispiele zeigen, wie Unsubscribe verwendet wird.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


//! Delete a subscription to an Amazon Simple Notification Service (Amazon SNS) topic.
/*!
  \param subscriptionARN: The Amazon Resource Name (ARN) for an Amazon SNS topic subscription.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::unsubscribe(const Aws::String &subscriptionARN,
                              const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::UnsubscribeRequest request;
    request.SetSubscriptionArn(subscriptionARN);

    const Aws::SNS::Model::UnsubscribeOutcome outcome = snsClient.Unsubscribe(request);

    if (outcome.IsSuccess()) {
        std::cout << "Unsubscribed successfully " << std::endl;
    }
    else {
        std::cerr << "Error while unsubscribing " << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter Abmelden in der AWS SDK für C++-API-Referenz.

Szenarien

Das folgende Codebeispiel zeigt, wie eine Serverless-Anwendung erstellt wird, mit der Benutzer Fotos mithilfe von Labels erstellen können.

SDK für C++

Zeigt, wie eine Anwendung zur Verwaltung von Fotobeständen entwickelt wird, die mithilfe von Amazon Rekognition Labels in Bildern erkennt und sie für einen späteren Abruf speichert.

Vollständiger Quellcode und Anweisungen zum Einrichten und Ausführen finden Sie im vollständigen Beispiel unter GitHub.

Einen tiefen Einblick in den Ursprung dieses Beispiels finden Sie im Beitrag in der AWS-Community.

In diesem Beispiel verwendete Services

API Gateway
DynamoDB
Lambda
Amazon Rekognition
Amazon S3
Amazon SNS

Das folgende Codebeispiel zeigt, wie SMS-Nachrichten über Amazon SNS veröffentlicht werden.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


/**
 * Publish SMS: use Amazon Simple Notification Service (Amazon SNS) to send an SMS text message to a phone number.
 * Note: This requires additional AWS configuration prior to running example. 
 * 
 *  NOTE: When you start using Amazon SNS to send SMS messages, your AWS account is in the SMS sandbox and you can only
 *  use verified destination phone numbers. See https://docs.aws.amazon.com/sns/latest/dg/sns-sms-sandbox.html.
 *  NOTE: If destination is in the US, you also have an additional restriction that you have use a dedicated
 *  origination ID (phone number). You can request an origination number using Amazon Pinpoint for a fee.
 *  See https://aws.amazon.com/blogs/compute/provisioning-and-using-10dlc-origination-numbers-with-amazon-sns/ 
 *  for more information. 
 * 
 *  <phone_number_value> input parameter uses E.164 format. 
 *  For example, in United States, this input value should be of the form: +12223334444
 */

//! Send an SMS text message to a phone number.
/*!
  \param message: The message to publish.
  \param phoneNumber: The phone number of the recipient in E.164 format.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SNS::publishSms(const Aws::String &message,
                             const Aws::String &phoneNumber,
                             const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::SNS::SNSClient snsClient(clientConfiguration);

    Aws::SNS::Model::PublishRequest request;
    request.SetMessage(message);
    request.SetPhoneNumber(phoneNumber);

    const Aws::SNS::Model::PublishOutcome outcome = snsClient.Publish(request);

    if (outcome.IsSuccess()) {
        std::cout << "Message published successfully with message id, '"
                  << outcome.GetResult().GetMessageId() << "'."
                  << std::endl;
    }
    else {
        std::cerr << "Error while publishing message "
                  << outcome.GetError().GetMessage()
                  << std::endl;
    }

    return outcome.IsSuccess();
}

Weitere API-Informationen finden Sie unter Veröffentlichen in der AWS SDK für C++-API-Referenz.

Wie das aussehen kann, sehen Sie am nachfolgenden Beispielcode:

Erstellen Sie ein Thema (FIFO oder Nicht-FIFO).
Abonnieren Sie mehrere Warteschlangen für das Thema mit der Option, einen Filter anzuwenden.
Veröffentlichen Sie eine Nachricht im Thema.
Fragen Sie die Warteschlangen nach empfangenen Nachrichten ab.

SDK für C++

Anmerkung

Auf GitHub finden Sie noch mehr. Hier finden Sie das vollständige Beispiel und erfahren, wie Sie das AWS-Codebeispiel-Repository einrichten und ausführen.


        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

//! Workflow for messaging with topics and queues using Amazon SNS and Amazon SQS.
/*!
 \param clientConfig Aws client configuration.
 \return bool: Successful completion.
 */
bool AwsDoc::TopicsAndQueues::messagingWithTopicsAndQueues(
        const Aws::Client::ClientConfiguration &clientConfiguration) {
    std::cout << "Welcome to messaging with topics and queues." << std::endl;
    printAsterisksLine();
    std::cout << "In this workflow, you will create an SNS topic and subscribe "
              << NUMBER_OF_QUEUES <<
              " SQS queues to the topic." << std::endl;
    std::cout
            << "You can select from several options for configuring the topic and the subscriptions for the "
            << NUMBER_OF_QUEUES << " queues." << std::endl;
    std::cout << "You can then post to the topic and see the results in the queues."
              << std::endl;

    Aws::SNS::SNSClient snsClient(clientConfiguration);

    printAsterisksLine();

    std::cout << "SNS topics can be configured as FIFO (First-In-First-Out)."
              << std::endl;
    std::cout
            << "FIFO topics deliver messages in order and support deduplication and message filtering."
            << std::endl;
    bool isFifoTopic = askYesNoQuestion(
            "Would you like to work with FIFO topics? (y/n) ");

    bool contentBasedDeduplication = false;
    Aws::String topicName;
    if (isFifoTopic) {
        printAsterisksLine();
        std::cout << "Because you have chosen a FIFO topic, deduplication is supported."
                  << std::endl;
        std::cout
                << "Deduplication IDs are either set in the message or automatically generated "
                << "from content using a hash function." << std::endl;
        std::cout
                << "If a message is successfully published to an SNS FIFO topic, any message "
                << "published and determined to have the same deduplication ID, "
                << std::endl;
        std::cout
                << "within the five-minute deduplication interval, is accepted but not delivered."
                << std::endl;
        std::cout
                << "For more information about deduplication, "
                << "see https://docs.aws.amazon.com/sns/latest/dg/fifo-message-dedup.html."
                << std::endl;
        contentBasedDeduplication = askYesNoQuestion(
                "Use content-based deduplication instead of entering a deduplication ID? (y/n) ");
    }

    printAsterisksLine();

    Aws::SQS::SQSClient sqsClient(clientConfiguration);
    Aws::Vector<Aws::String> queueURLS;
    Aws::Vector<Aws::String> subscriptionARNS;

    Aws::String topicARN;
    {
        topicName = askQuestion("Enter a name for your SNS topic. ");

        // 1.  Create an Amazon SNS topic, either FIFO or non-FIFO.
        Aws::SNS::Model::CreateTopicRequest request;

        if (isFifoTopic) {
            request.AddAttributes("FifoTopic", "true");
            if (contentBasedDeduplication) {
                request.AddAttributes("ContentBasedDeduplication", "true");
            }
            topicName = topicName + FIFO_SUFFIX;

            std::cout
                    << "Because you have selected a FIFO topic, '.fifo' must be appended to the topic name."
                    << std::endl;
        }

        request.SetName(topicName);

        Aws::SNS::Model::CreateTopicOutcome outcome = snsClient.CreateTopic(request);

        if (outcome.IsSuccess()) {
            topicARN = outcome.GetResult().GetTopicArn();
            std::cout << "Your new topic with the name '" << topicName
                      << "' and the topic Amazon Resource Name (ARN) " << std::endl;
            std::cout << "'" << topicARN << "' has been created." << std::endl;

        }
        else {
            std::cerr << "Error with TopicsAndQueues::CreateTopic. "
                      << outcome.GetError().GetMessage()
                      << std::endl;

            cleanUp(topicARN,
                    queueURLS,
                    subscriptionARNS,
                    snsClient,
                    sqsClient);

            return false;
        }
    }

    printAsterisksLine();

    std::cout << "Now you will create " << NUMBER_OF_QUEUES
              << " SQS queues to subscribe to the topic." << std::endl;
    Aws::Vector<Aws::String> queueNames;
    bool filteringMessages = false;
    bool first = true;
    for (int i = 1; i <= NUMBER_OF_QUEUES; ++i) {
        Aws::String queueURL;
        Aws::String queueName;
        {
            printAsterisksLine();
            std::ostringstream ostringstream;
            ostringstream << "Enter a name for " << (first ? "an" : "the next")
                          << " SQS queue. ";
            queueName = askQuestion(ostringstream.str());

            // 2.  Create an SQS queue.
            Aws::SQS::Model::CreateQueueRequest request;
            if (isFifoTopic) {
                request.AddAttributes(Aws::SQS::Model::QueueAttributeName::FifoQueue,
                                      "true");
                queueName = queueName + FIFO_SUFFIX;

                if (first) // Only explain this once.
                {
                    std::cout
                            << "Because you are creating a FIFO SQS queue, '.fifo' must "
                            << "be appended to the queue name." << std::endl;
                }
            }

            request.SetQueueName(queueName);
            queueNames.push_back(queueName);

            Aws::SQS::Model::CreateQueueOutcome outcome =
                    sqsClient.CreateQueue(request);

            if (outcome.IsSuccess()) {
                queueURL = outcome.GetResult().GetQueueUrl();
                std::cout << "Your new SQS queue with the name '" << queueName
                          << "' and the queue URL " << std::endl;
                std::cout << "'" << queueURL << "' has been created." << std::endl;
            }
            else {
                std::cerr << "Error with SQS::CreateQueue. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }
        }
        queueURLS.push_back(queueURL);

        if (first) // Only explain this once.
        {
            std::cout
                    << "The queue URL is used to retrieve the queue ARN, which is "
                    << "used to create a subscription." << std::endl;
        }

        Aws::String queueARN;
        {
            // 3.  Get the SQS queue ARN attribute.
            Aws::SQS::Model::GetQueueAttributesRequest request;
            request.SetQueueUrl(queueURL);
            request.AddAttributeNames(Aws::SQS::Model::QueueAttributeName::QueueArn);

            Aws::SQS::Model::GetQueueAttributesOutcome outcome =
                    sqsClient.GetQueueAttributes(request);

            if (outcome.IsSuccess()) {
                const Aws::Map<Aws::SQS::Model::QueueAttributeName, Aws::String> &attributes =
                        outcome.GetResult().GetAttributes();
                const auto &iter = attributes.find(
                        Aws::SQS::Model::QueueAttributeName::QueueArn);
                if (iter != attributes.end()) {
                    queueARN = iter->second;
                    std::cout << "The queue ARN '" << queueARN
                              << "' has been retrieved."
                              << std::endl;
                }
                else {
                    std::cerr
                            << "Error ARN attribute not returned by GetQueueAttribute."
                            << std::endl;

                    cleanUp(topicARN,
                            queueURLS,
                            subscriptionARNS,
                            snsClient,
                            sqsClient);

                    return false;
                }
            }
            else {
                std::cerr << "Error with SQS::GetQueueAttributes. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }
        }

        if (first) {
            std::cout
                    << "An IAM policy must be attached to an SQS queue, enabling it to receive "
                       "messages from an SNS topic." << std::endl;
        }

        {
            // 4.  Set the SQS queue policy attribute with a policy enabling the receipt of SNS messages.
            Aws::SQS::Model::SetQueueAttributesRequest request;
            request.SetQueueUrl(queueURL);
            Aws::String policy = createPolicyForQueue(queueARN, topicARN);
            request.AddAttributes(Aws::SQS::Model::QueueAttributeName::Policy,
                                  policy);

            Aws::SQS::Model::SetQueueAttributesOutcome outcome =
                    sqsClient.SetQueueAttributes(request);

            if (outcome.IsSuccess()) {
                std::cout << "The attributes for the queue '" << queueName
                          << "' were successfully updated." << std::endl;
            }
            else {
                std::cerr << "Error with SQS::SetQueueAttributes. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }
        }

        printAsterisksLine();

        {
            // 5.  Subscribe the SQS queue to the SNS topic.
            Aws::SNS::Model::SubscribeRequest request;
            request.SetTopicArn(topicARN);
            request.SetProtocol("sqs");
            request.SetEndpoint(queueARN);
            if (isFifoTopic) {
                if (first) {
                    std::cout << "Subscriptions to a FIFO topic can have filters."
                              << std::endl;
                    std::cout
                            << "If you add a filter to this subscription, then only the filtered messages "
                            << "will be received in the queue." << std::endl;
                    std::cout << "For information about message filtering, "
                              << "see https://docs.aws.amazon.com/sns/latest/dg/sns-message-filtering.html"
                              << std::endl;
                    std::cout << "For this example, you can filter messages by a \""
                              << TONE_ATTRIBUTE << "\" attribute." << std::endl;
                }

                std::ostringstream ostringstream;
                ostringstream << "Filter messages for \"" << queueName
                              << "\"'s subscription to the topic \""
                              << topicName << "\"?  (y/n)";

                // Add filter if user answers yes.
                if (askYesNoQuestion(ostringstream.str())) {
                    Aws::String jsonPolicy = getFilterPolicyFromUser();
                    if (!jsonPolicy.empty()) {
                        filteringMessages = true;

                        std::cout << "This is the filter policy for this subscription."
                                  << std::endl;
                        std::cout << jsonPolicy << std::endl;

                        request.AddAttributes("FilterPolicy", jsonPolicy);
                    }
                    else {
                        std::cout
                                << "Because you did not select any attributes, no filter "
                                << "will be added to this subscription." << std::endl;
                    }
                }
            }  // if (isFifoTopic)
            Aws::SNS::Model::SubscribeOutcome outcome = snsClient.Subscribe(request);

            if (outcome.IsSuccess()) {
                Aws::String subscriptionARN = outcome.GetResult().GetSubscriptionArn();
                std::cout << "The queue '" << queueName
                          << "' has been subscribed to the topic '"
                          << "'" << topicName << "'" << std::endl;
                std::cout << "with the subscription ARN '" << subscriptionARN << "."
                          << std::endl;
                subscriptionARNS.push_back(subscriptionARN);
            }
            else {
                std::cerr << "Error with TopicsAndQueues::Subscribe. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }
        }

        first = false;
    }

    first = true;
    do {
        printAsterisksLine();

        // 6.  Publish a message to the SNS topic.
        Aws::SNS::Model::PublishRequest request;
        request.SetTopicArn(topicARN);
        Aws::String message = askQuestion("Enter a message text to publish.  ");
        request.SetMessage(message);
        if (isFifoTopic) {
            if (first) {
                std::cout
                        << "Because you are using a FIFO topic, you must set a message group ID."
                        << std::endl;
                std::cout
                        << "All messages within the same group will be received in the "
                        << "order they were published." << std::endl;
            }
            Aws::String messageGroupID = askQuestion(
                    "Enter a message group ID for this message. ");
            request.SetMessageGroupId(messageGroupID);
            if (!contentBasedDeduplication) {
                if (first) {
                    std::cout
                            << "Because you are not using content-based deduplication, "
                            << "you must enter a deduplication ID." << std::endl;
                }
                Aws::String deduplicationID = askQuestion(
                        "Enter a deduplication ID for this message. ");
                request.SetMessageDeduplicationId(deduplicationID);
            }
        }

        if (filteringMessages && askYesNoQuestion(
                "Add an attribute to this message? (y/n) ")) {
            for (size_t i = 0; i < TONES.size(); ++i) {
                std::cout << "  " << (i + 1) << ". " << TONES[i] << std::endl;
            }
            int selection = askQuestionForIntRange(
                    "Enter a number for an attribute. ",
                    1, static_cast<int>(TONES.size()));
            Aws::SNS::Model::MessageAttributeValue messageAttributeValue;
            messageAttributeValue.SetDataType("String");
            messageAttributeValue.SetStringValue(TONES[selection - 1]);
            request.AddMessageAttributes(TONE_ATTRIBUTE, messageAttributeValue);
        }

        Aws::SNS::Model::PublishOutcome outcome = snsClient.Publish(request);

        if (outcome.IsSuccess()) {
            std::cout << "Your message was successfully published." << std::endl;
        }
        else {
            std::cerr << "Error with TopicsAndQueues::Publish. "
                      << outcome.GetError().GetMessage()
                      << std::endl;

            cleanUp(topicARN,
                    queueURLS,
                    subscriptionARNS,
                    snsClient,
                    sqsClient);

            return false;
        }

        first = false;
    } while (askYesNoQuestion("Post another message? (y/n) "));

    printAsterisksLine();

    std::cout << "Now the SQS queue will be polled to retrieve the messages."
              << std::endl;
    askQuestion("Press any key to continue...", alwaysTrueTest);

    for (size_t i = 0; i < queueURLS.size(); ++i) {
        // 7.  Poll an SQS queue for its messages.
        std::vector<Aws::String> messages;
        std::vector<Aws::String> receiptHandles;
        while (true) {
            Aws::SQS::Model::ReceiveMessageRequest request;
            request.SetMaxNumberOfMessages(10);
            request.SetQueueUrl(queueURLS[i]);

            // Setting WaitTimeSeconds to non-zero enables long polling.
            // For information about long polling, see
            // https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-short-and-long-polling.html
            request.SetWaitTimeSeconds(1);
            Aws::SQS::Model::ReceiveMessageOutcome outcome =
                    sqsClient.ReceiveMessage(request);

            if (outcome.IsSuccess()) {
                const Aws::Vector<Aws::SQS::Model::Message> &newMessages = outcome.GetResult().GetMessages();
                if (newMessages.empty()) {
                    break;
                }
                else {
                    for (const Aws::SQS::Model::Message &message: newMessages) {
                        messages.push_back(message.GetBody());
                        receiptHandles.push_back(message.GetReceiptHandle());
                    }
                }
            }
            else {
                std::cerr << "Error with SQS::ReceiveMessage. "
                          << outcome.GetError().GetMessage()
                          << std::endl;

                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }
        }

        printAsterisksLine();

        if (messages.empty()) {
            std::cout << "No messages were ";
        }
        else if (messages.size() == 1) {
            std::cout << "One message was ";
        }
        else {
            std::cout << messages.size() << " messages were ";
        }
        std::cout << "received by the queue '" << queueNames[i]
                  << "'." << std::endl;
        for (const Aws::String &message: messages) {
            std::cout << "  Message : '" << message << "'."
                      << std::endl;
        }

        // 8.  Delete a batch of messages from an SQS queue.
        if (!receiptHandles.empty()) {
            Aws::SQS::Model::DeleteMessageBatchRequest request;
            request.SetQueueUrl(queueURLS[i]);
            int id = 1; // Ids must be unique within a batch delete request.
            for (const Aws::String &receiptHandle: receiptHandles) {
                Aws::SQS::Model::DeleteMessageBatchRequestEntry entry;
                entry.SetId(std::to_string(id));
                ++id;
                entry.SetReceiptHandle(receiptHandle);
                request.AddEntries(entry);
            }

            Aws::SQS::Model::DeleteMessageBatchOutcome outcome =
                    sqsClient.DeleteMessageBatch(request);

            if (outcome.IsSuccess()) {
                std::cout << "The batch deletion of messages was successful."
                          << std::endl;
            }
            else {
                std::cerr << "Error with SQS::DeleteMessageBatch. "
                          << outcome.GetError().GetMessage()
                          << std::endl;
                cleanUp(topicARN,
                        queueURLS,
                        subscriptionARNS,
                        snsClient,
                        sqsClient);

                return false;
            }
        }
    }

    return cleanUp(topicARN,
                   queueURLS,
                   subscriptionARNS,
                   snsClient,
                   sqsClient,
                   true); // askUser
}


bool AwsDoc::TopicsAndQueues::cleanUp(const Aws::String &topicARN,
                                      const Aws::Vector<Aws::String> &queueURLS,
                                      const Aws::Vector<Aws::String> &subscriptionARNS,
                                      const Aws::SNS::SNSClient &snsClient,
                                      const Aws::SQS::SQSClient &sqsClient,
                                      bool askUser) {
    bool result = true;
    printAsterisksLine();
    if (!queueURLS.empty() && askUser &&
        askYesNoQuestion("Delete the SQS queues? (y/n) ")) {

        for (const auto &queueURL: queueURLS) {
            // 9.  Delete an SQS queue.
            Aws::SQS::Model::DeleteQueueRequest request;
            request.SetQueueUrl(queueURL);

            Aws::SQS::Model::DeleteQueueOutcome outcome =
                    sqsClient.DeleteQueue(request);

            if (outcome.IsSuccess()) {
                std::cout << "The queue with URL '" << queueURL
                          << "' was successfully deleted." << std::endl;
            }
            else {
                std::cerr << "Error with SQS::DeleteQueue. "
                          << outcome.GetError().GetMessage()
                          << std::endl;
                result = false;
            }
        }

        for (const auto &subscriptionARN: subscriptionARNS) {
            // 10. Unsubscribe an SNS subscription.
            Aws::SNS::Model::UnsubscribeRequest request;
            request.SetSubscriptionArn(subscriptionARN);

            Aws::SNS::Model::UnsubscribeOutcome outcome =
                    snsClient.Unsubscribe(request);

            if (outcome.IsSuccess()) {
                std::cout << "Unsubscribe of subscription ARN '" << subscriptionARN
                          << "' was successful." << std::endl;
            }
            else {
                std::cerr << "Error with TopicsAndQueues::Unsubscribe. "
                          << outcome.GetError().GetMessage()
                          << std::endl;
                result = false;
            }
        }
    }

    printAsterisksLine();
    if (!topicARN.empty() && askUser &&
        askYesNoQuestion("Delete the SNS topic? (y/n) ")) {

        // 11. Delete an SNS topic.
        Aws::SNS::Model::DeleteTopicRequest request;
        request.SetTopicArn(topicARN);

        Aws::SNS::Model::DeleteTopicOutcome outcome = snsClient.DeleteTopic(request);

        if (outcome.IsSuccess()) {
            std::cout << "The topic with ARN '" << topicARN
                      << "' was successfully deleted." << std::endl;
        }
        else {
            std::cerr << "Error with TopicsAndQueues::DeleteTopicRequest. "
                      << outcome.GetError().GetMessage()
                      << std::endl;
            result = false;
        }
    }

    return result;
}

//! Create an IAM policy that gives an SQS queue permission to receive messages from an SNS topic.
/*!
 \sa createPolicyForQueue()
 \param queueARN: The SQS queue Amazon Resource Name (ARN).
 \param topicARN: The SNS topic ARN.
 \return Aws::String: The policy as JSON.
 */
Aws::String AwsDoc::TopicsAndQueues::createPolicyForQueue(const Aws::String &queueARN,
                                                          const Aws::String &topicARN) {
    std::ostringstream policyStream;
    policyStream << R"({
        "Statement": [
        {
            "Effect": "Allow",
                    "Principal": {
                "Service": "sns.amazonaws.com"
            },
            "Action": "sqs:SendMessage",
                    "Resource": ")" << queueARN << R"(",
                    "Condition": {
                "ArnEquals": {
                    "aws:SourceArn": ")" << topicARN << R"("
                }
            }
        }
        ]
    })";

    return policyStream.str();
}

Weitere API-Informationen finden Sie in den folgenden Themen der AWS SDK für C++-API-Referenz.

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Dokumentkonventionen

Amazon SES

Amazon SQS