AWS Snippets

AWS Command Line Interface Installation $ curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64-2.0.30.zip" -o "awscliv2.zip" unzip awscliv2.zip sudo ./aws/install AWS Documentation RDS Export Database Configuration Export instance configuration aws rds describe-db-instances --db-instance-identifier arn:aws:rds:eu-central-1:123456789:db:hascode-prd-db --no-paginate Export parameter group configuration aws rds describe-db-parameters --db-parameter-group-name PARAM_GROUP_NAME >> param_group_conf.json Export option group configuration aws rds describe-option-groups --option-group-name OPT_GROUP_NAME >> option_group_conf.json Generate Signed URLs with Linux Tools e.g. for accessing a website behind a CloudFront distribution using a canned policy. Write the policy file ...

March 1, 2018 · 2 min · 407 words · Micha Kops

Setting up an OAuth2 Authorization Server and Resource Provider with Spring Boot

OAuth2 is a frequently used standard for authorization and with Spring Boot it is easy to set up authorization and resource server in no time. In the following short tutorial I’d like to demonstrate how to set up an OAuth2 authorization server as well as a connected and secured resource server within a few minutes using Java, Maven and Spring Boot. Figure 1. OAuth2 Flow with Spring Boot in Action...

March 13, 2016 · 6 min · 1125 words · Micha Kops

Performance Testing a Multiuser Web Application with JMeter and Maven

When there is the need to create load tests or performance tests for an application, Apache JMeter is a handy tool and set up with ease. In the following short tutorial I’d like to demonstrate how to configure JMeter to log into a Java EE web application with multiple users specified in a CSV file, how to generate some basic reports and how to integrate JMeter into a mavenized build using the JMeter Maven Plugin. ...

January 18, 2015 · 7 min · 1327 words · Micha Kops

Java EE: Setting up and Testing Form-Based JDBC Authentication with Arquillian and Maven

Especially when it comes to testing, setting up a decent environment for a secured Java EE web application isn’t always an easy thing to do. In the following tutorial I’d like to demonstrate how to create a secured web application using form-based authentication and a JDBC realm to fetch users and roles and how to run the application in an embedded container for testing and development. Additionally I’d like to show how to write and run integration tests to verify the security setup using a setup of Maven, Embedded GlassFish, Arquillian, jUnit and rest-assured. ...

December 21, 2014 · 14 min · 2822 words · Micha Kops

Java EE: Logging User Interaction the Aspect-Oriented Way using Interceptors

Using dependency injection and aspect-oriented mechanisms like interceptors allow us to separate cross-cutting-concerns in our Java enterprise application, to control global aspects of our application and to avoid boilerplate code. In the following short tutorial we’re going to create an aspect-oriented logger to protocol the initiating user, class and method called and the parameters passed to the method and finally we’re adding this interceptor to a sample RESTful web-service by adding a simple annotation. ...

May 26, 2014 · 6 min · 1275 words · Micha Kops

Maven Tomcat Plugin: Adding Authentication to an Embedded Tomcat

The Tomcat Maven Plugin not only allows us to deploy our mavenized application to an existing Tomcat server but also to run our web application with an embedded instance from our project’s directory. Recently I needed to add basic authentication to such an instance and wanted to share the steps necessary here Prerequisites We just need Maven and a JDK … Java Development Kit >= 6 Maven 3 Project Setup I am using the webapp archetype here We’re adding the following configuration for the Tomcat plugin to your pom.xml – my final descriptor is this one pom.xml...

October 12, 2011 · 3 min · 616 words · Micha Kops