"People try to copy Netflix, but they can only copy what they see. They copy the results, not the process" - A.Cockcroft - AWS
Many case studies about migrating to microservices are about big organizations like Netflix, Google, Zalando, Facebook, Etsy, etc. What about smaller companies?
Each journey is different for every organization: what works for an org does not work for another. No golden-rule.
There are different circumstances:
2008 started with a POC with magento => starts fine but does not scale very well
2010 couldn't handle the raising load and traffic with magento
=> so in 3 months they build their own system, based on Java, Spring, Postgres DB (a monolithic application)
Every Software Engineer certainly must have to deal with change. Change is a constant in Software Design: adding feature, changing of requirement or bug fixing.
What is a design pattern? In simplest way I can say, it is a general solution for common problems in Software Development. The purpose of design patterns is to help structure your code so it will be flexible and resilient when its changed.
There are 23 common design patterns that are being used by programmers around the world. In this chapter I am going to describe the Observer Pattern.
| post { | |
| always { | |
| archiveArtifacts artifacts: '**/build/libs/*.war', onlyIfSuccessful: true | |
| jacoco( | |
| classPattern: '**/classes/kotlin/main', | |
| sourcePattern: '**/src/main/kotlin', | |
| sourceInclusionPattern: '**/*.kt' | |
| ) | |
| } | |
| success { |
| // inside a step in the Jenkinsfile... | |
| ... | |
| jacoco( | |
| classPattern: '**/classes/kotlin/main', | |
| sourcePattern: '**/src/main/kotlin', | |
| sourceInclusionPattern: '**/*.kt' | |
| ) | |
| ... |
build/
classes
kotlin
jacoco
test.exec
reports
jacoco
build/
classes
kotlin
jacoco
test.exec
...
| plugins { | |
| ... | |
| id 'jacoco' | |
| } |
In order to have code coverage measurement enabled on your gradle project, you have to just add the jacoco plugin to the build.gradle plugin section
plugins {
...
id 'jacoco'
}
When you find it difficult to write a concise, focused, isolated test, the production code has unhealthy dependencies to loosen, invert, or break.
Here, “concise” means having no irrelevant details; “focused” means failing for only one reason; “isolated” means executing without side effects on other tests.