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Showing posts from May, 2016

An Introduction to Wiremock

This post provides a brief introduction to Wiremock, showing how it can be used to to quickly and easily mock remote API calls. We'll use Wiremock to write some integration tests for a simple Dropwizard app and show you how it can be put to use in a real world scenario.

Why would I need to mock external API calls? There are a number of scenarios where it makes sense to mock an external API rather than call a live service.
The external API may still be in development and not yet available for integration. In this instance as long as a data contract has been defined (e.g. Swagger spec, WSDL), the remote API can be stubbed based on the data contract. Stubbed endpoints allows a team to continue development even when external APIs isn't fully implemented.You may have little or no control over the external API uptime in development or test.  As a result you cannot guarantee it will be available to call when running integration tests. In this instance it makes sense to use mocked respo…

Spring Boot & Amazon Web Services (EC2, RDS & S3)

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This post will take you through a step by step guide to building and deploying a simple Java application to the AWS cloud platform. The application will use a few well known AWS services which I'll describe along the way. There is quite a bit of material to cover in this post so the overview of the AWS services will be light. For those interested in finding out more I'll link to the appropriate section of the AWS documentation. Amazon have done a fine job documenting their platform so I'd encourage you to have a read if time permits.      

Prerequisites In order to get the sample application up and running you'll need access to AWS. If you don't already have access you can register for a free account which includes access to a bunch of great services and some pretty generous allowances. I'd encourage you to get an account set up now before going any further.

What will the sample application look like? The application we're going to build is very simple custo…