Create AWS serverless workflows by using the AWS SDK for Java

 You can create an AWS serverless workflow by using the AWS SDK for Java and AWS Step Functions. Each workflow step is implemented by using an AWS Lambda function. Lambda is a compute service that enables you to run code without provisioning or managing servers.

Note: You can create Lambda functions in various programming languages. For this tutorial, Lambda functions are implemented by using the Lambda Java API.

In this tutorial, you create a workflow that creates support tickets for an organization. Each workflow step performs an operation on the ticket. This tutorial shows you how to use Java to process workflow data. For example, you'll learn how to read data that's passed to the workflow, how to pass data between steps, and how to invoke AWS services from the workflow.

For details, see https://github.com/awsdocs/aws-doc-sdk-examples/tree/master/javav2/usecases/creating_workflows_stepfunctions

I (Scott Macdonald) am a Java Programmer at Amazon AWS. I work on AWS Java code that helps AWS developers. Included in this role is working with AWS Services such as S3, DynamoDB, EC2, Lambda functions, and so on.

Linked In: http://www.linkedin.com/in/scottmacdonald2010

Creating the DynamoDB web application item tracker

 You can develop a web application that tracks and reports on work items by using the following AWS services:

• DynamoDB to store the data
• Amazon Simple Email Service to send email messages
• AWS Elastic Beanstalk to host the application

Note: The AWS SDK for Java version 2 is used to access Amazon SES and DynamoDB.

The application you create is named DynamoDB Item Tracker, and uses Spring Boot APIs to build a model, different views, and a controller. It’s a secure web application that requires a user to log into the application. 

This tutorial guides you through creating the DynamoDB Item Tracker application. Once the application is developed, you'll learn how to deploy it to Elastic Beanstalk.

The following figure shows the application.

See https://github.com/awsdocs/aws-doc-sdk-examples/tree/master/javav2/usecases/creating_dynamodb_web_app.

I (Scott Macdonald) am a Java Programmer at Amazon AWS. I work on AWS Java code that helps AWS developers. Included in this role is working with AWS Services such as S3, DynamoDB, EC2, Lambda functions, and so on.

Linked In: http://www.linkedin.com/in/scottmacdonald2010

Create a Sample AWS Photo Analyzer application using the AWS SDK for Java

You can create an AWS application that analyzes nature images located in a S3 bucket by using the Amazon Rekognition service. The application can analyze many images and generate a report that breaks down each image into a series of labels. For example, the following image shows a lake.

After the application analyzes this image, it creates this data.

• Panoramic - 99.99971
• Outdoors - 99.99971
• Nature - 99.99971
• Landscape - 99.99971
• Scenery - 99.99971
• Wilderness - 96.90007
• Water - 93.501465
• Lake - 87.28128

In addition, this application uses the Simple Email Service (SES) to send a report to a given email recipient. In this tutorial, you create a Spring Boot application named AWS Photo Analyzer. The Spring Boot APIs are used to build a model, different views, and a controller. For more information, see Spring Boot - Securing Web Applications.

This application uses these AWS Services:

• Amazon Rekognition
• Amazon S3
• Amazon Simple Email Service
• AWS Elastic BeanStalk

To read this AWS Tutorial, click: https://github.com/awsdocs/aws-doc-sdk-examples/tree/master/javav2/usecases/creating_photo_analyzer_app

I (Scott Macdonald) am a Java Programmer at Amazon AWS. I work on AWS Java code that helps AWS developers. Included in this role is working with AWS Services such as S3, DynamoDB, EC2, Lambda functions, and so on.

Linked In: http://www.linkedin.com/in/scottmacdonald2010

Creating the Amazon Relational Database Service item tracker

You can develop a secure Spring application that tracks and reports on work items by using the following AWS services:

• Amazon Relational Database Service (Amazon RDS)
• Amazon Simple Email Service (Java SDK v2 is used to access Amazon SES)
• AWS Elastic Beanstalk

The application you create is named AWS Tracker, and uses Spring Boot APIs to build a model, different views, and a controller. It’s a secure web application that requires a user to log into the application. This tutorial guides you through creating the AWS Tracker application. Once the application is developed, you'll learn how to deploy it to Elastic Beanstalk.

To read this tutorial, see https://github.com/awsdocs/aws-doc-sdk-examples/tree/master/javav2/usecases/creating_secure_spring_app.

I (Scott Macdonald) am a Java Programmer at Amazon AWS. I work on AWS Java code that helps AWS developers. Included in this role is working with AWS Services such as S3, DynamoDB, EC2, Lambda functions, and so on.

Linked In: http://www.linkedin.com/in/scottmacdonald2010

Developing a Spring MVC 4/5 project by using Maven and IntelliJ IDE

You can create a Spring MVC project by using Maven and IntelliJ IDE. In this development article, Spring version 4/5 and IntelliJ 2019 are used. This development article guides you through how to create a Spring MVC project, including how to configure the Spring DispatcherServlet. This servlet dispatches client requests to handlers. The default handler is a controller interface that lets you work with a ModelMap instance

The following illustration shows the web page that is created in this article.

The following illustration shows the files that you create in the IntelliJ project. 

In the previous illustration, notice the required files you need for a Spring MVC project, including the Java Controller class (named HelloController), the web.xml file and the JSP (named hello.jsp) that renders the view. 

To read this development article for Spring MVC 4, click this link https://drive.google.com/open?id=1-oQ5aXrSLjiZdIf0KXO5yD0EARKspzu4.

To read this development article for Spring MVC 5, click this link, https://drive.google.com/open?id=1kmc6RvwNicmr7PDD3BZDFcGp1zcdXQJy.

How to compile LESS using Node JS

You can use Node JS to compile LESS files into CSS files. The first thing to do is to install Node JS on your computer, For information, see:

https://blog.teamtreehouse.com/install-node-js-npm-windows

Once you have Node JS installed on your machine, test the installation:

npm -version

If this command is successful, you will see the installed version.

In your working folder, place a LESS file named simple.less. For example, you can use this LESS code:

@primarycolor: #FF7F50;  
@color:#800080;  
h2{  
color: @primarycolor;  
}  
h3{  
color: @color;  
}  

Next, create an HTML file named index.html:

<head>      
 <link rel="stylesheet" href="simple.css" type="text/css" />  
</head>  
<body>  
 <h2>A simple example of Less</h2>  
 <h3>Hello World</h3>  
</body>  
</html>  

In this working folder, you have a simple.less and index.html. In the HTML file, notice the reference to simple.css. This file is produced by compiling the LESS file into a CSS file. To compile the LESS file into a CSS file, use this command:

lessc simple.less simple.css

In your working folder, you will now have simple.css.

h2 {
  color: #FF7F50;
}
h3 {
  color: #800080;

}

Open the HTML in a browser, and you will see the rendered HTML with the CSS.

You have now learned how to compile a LESS file into a CSS file by using Node JS. 


I (Scott Macdonald) am a Senior .NET Developer Writer at Sitecore with 20 years in the high tech industry. I am also a programmer with knowledge in .NET, Java, JavaScript, C#,C++, HTML, XML and ActionScript. 



Linked In: http://www.linkedin.com/in/scottmacdonald2010

Last AEM Post in Scotts Digital Community

I have been running this blog for 8 years. The entry on March 2019 will be the last AEM entry on this blog. All content is located within the Adobe HELPX system. It's been great posting these how-to articles on using mainly AEM.

You can now find me at Amazon AWS, where I have been working as a Java programmer working on AWS Java code. If you want to learn about AWS, feel free to contact me via Linked In - linkedin.com/in/scottmacdonald2010

Thank you!