MATLAB Interface for Amazon SNS

MATLAB® interface for the Amazon SNS™ service.

Requirements

MathWorks products

• Requires MATLAB release R2017a or later.
• AWS Common utilities found at https://github.com/mathworks-ref-arch/matlab-aws-common
• (Recommended) MATLAB Interface for Amazon SQS™ found at https://github.com/mathworks-ref-arch/matlab-aws-sqs

3rd party products

• Amazon Web Services account

To build a required JAR file:

• Maven
• JDK 7 or later
• AWS SDK for Java (version 1.11.567 or later)

Getting Started

Please refer to the Documentation to get started. The Installation Instructions and Getting Started documents provide detailed instructions on setting up and using the interface. The easiest way to fetch this repository and all required dependencies is to clone the top-level repository using:

git clone --recursive https://github.com/mathworks-ref-arch/mathworks-aws-support.git

Build the AWS SDK for Java components

The MATLAB code uses the AWS SDK for Java and can be built using:

cd Software/Java
mvn clean package

Once built, use the /Software/MATLAB/startup.m function to initialize the interface which will use the AWS Credentials Provider Chain to authenticate. Please see the relevant documentation on how to specify the credentials.

Publishing to an SNS Topic subscribed to an SQS queue

% Create the client
sns = aws.sns.Client();
sns.useCredentialsProviderChain = false;
sns.initialize();

% Create a topic
createTopicResult = sns.createTopic('mySNSTopicName');
topicArn = createTopicResult.getTopicArn();

% List topics
listTopicsResult = sns.listTopics();
topicsTable = listTopicsResult.getTopics();

% Subscribe the topic to an existing SQS queue
subscribeResult = sns.subscribe(topicArn,'sqs',queueArn);
subscriptionArn = subscribeResult.getSubscriptionArn();

% Configure a custom SQS policy to allow publishing, in this case by all accounts
% Requires the installation of the MATLAB Interface for Amazon SQS, the
% creation of a queue and an SQS client
keySet = {'Policy'};
policyStr = ['{"Version":"2012-10-17",',...
              '"Id":"',queueName,'/settingSQSDefaultPolicy",',...
              '"Statement":[{',...
              '"Sid":"Allow-send-message-access",',...
              '"Effect":"Allow",',...
              '"Principal":"*",',...
              '"Action":"SQS:SendMessage",',...
              '"Resource":"',queueArn,'"',...
             '}]}'];                     
valueSet = {policyStr};
attributes = containers.Map(keySet,valueSet);
setQueueAttributesResult = sqs.setQueueAttributes(queueUrl, attributes);
% Allow time for attributes to be applied
pause(30);

% Publish a message to the SNS topic
messageId = sns.publish(topicArn, 'My SNS message');

% Allow some time for the message to propagate and
% receive new SQS messages
pause(30);
receiveMessageResult = sqs.receiveMessage(queueUrl);
messages = receiveMessageResult.getMessages();

% Note the body of the SNS message will be in JSON format and so will need to be
% decoded to return the sent message
% body = jsondecode(messages{n}.getBody());
% body.Message
% ans =
%  'My SNS message'

% Delete the topic and shutdown the client
deleteTopicResult = sns.deleteTopic(topicArn);
sns.shutdown();

Supported Products:

1. MATLAB (R2017a or later)
2. MATLAB Compiler™ and MATLAB Compiler SDK™ (R2017a or later)
3. MATLAB Production Server™ (R2017a or later)
4. MATLAB Parallel Server™ (R2017a or later)

License

The license for the MATLAB Interface for Amazon SNS is available in the LICENSE.md file in this GitHub repository. This package uses certain third-party content which is licensed under separate license agreements. See the pom.xml file for third-party software downloaded at build time.

Enhancement Request

Provide suggestions for additional features or capabilities using the following link:
https://www.mathworks.com/products/reference-architectures/request-new-reference-architectures.html

Support

Email: mwlab@mathworks.com or please log an issue.