Dropwizard - Production Ready Web Services

Dropwizard is a tool for building RESTful web services using mature and well understood libraries and technologies for the JVM. It not only provides a stack that enables rapid development of services but also actively encourages production-ready solutions with inclusion of ops focused technologies such as metrics, logging and configuration baked in.

Transcript

1. Dropwizard production ready restful web services…
2. ... for java … for java
3. preamble … the case for dropwizard
4. Dropwizard is an exemplar for ops-friendly, self contained, high performing, framework-less web service building technologies
5. … written in java
6. The concepts, principles & patterns contained herein can and should be applied to any services you build irrespective of technology or language
7. “micro service architecture” bit.ly/187C3Le
8. The rise of real service oriented architecture has meant that services are now an acceptable level of abstraction for defining system features
9. “ the world needs devops”
10. develop ⇝ deploy ⇝ disaster a typical release pipeline
11. When things go smoothly our initial reaction is one of surprise followed by suspicion
12. develop ⇝ deploy ⇝ disaster its their fault! they don’t get it! what the hell is this
13. news flash!
14. You are not writing code for your own gratification
15. You are trying to make others lives better
16. Your code and infrastructure will fail a lot
17. You are not in competition with other departments
18. You need a shared understanding of system behaviour
19. DEAL WITH IT!
20. Dropwizard provides a set of features that enable you to build systems capable of adapting to, both, a changing business and operational domain
21. Dropwizard the actual topic of the talk
22. Dropwizard is a Java framework for developing ops-friendly, high- performance, RESTful web services. http://dropwizard.io
23. A damn simple library for building production-ready RESTful web services github.com/dropwizard/dropwizard
24. It's a little bit of opinionated glue code which bangs together a set of libraries which have historically not sucked github.com/dropwizard/dropwizard
25. Jetty Jersey Jackson Metrics HTTP Library REST Library JSON Processor Instrumentation
26. Guava Immutable Collections & Utils Logback Freemarker & Mustache JodaTime Hibernate Validator JDBI & Liquibase Logging Validation Data Access & Migration Templating Non-Terrible Time
27. - Java is Java - Annotations are awful - Documentation is dispersed The “Nobody’s Perfect”
28. 1. Create Configuration YML & Class 2. Create the Service 3. Create the Representation 4. Create & Register the Resource 5. Build & Run Lets Build a Service!!!
29. I could have done this with Rails, Sinatra, Spring, Play, Finagle, Express, Nancy.… So What?
30. The Admin Server Metrics Healthchecks
31. class DBManager implements Managed { public void start() { … } public void stop() { … } } // register in Service.initialize() environment.manage(myDBManager) Managed Objects
32. Commands // register in Service.initalize() bootstrap.addCommand(myCommand) > java -jar app.jar dingus class DingusCommand implements Command { public void configure(parser) { … } public void run(bootstrap, ns) { … } }
33. Tasks // register in Service.run() environment.addTask(myTask) > curl -X POST http://server/tasks/dingus class DingusTask implements Task { public void execute(params, out) { … } }
34. Bundles @Override public void initialize(bootstrap) { bootstrap.addBundle( new AssetsBundle("/assets/", "/")); } Reusable modules of functionality
35. import static com.yammer.dropwizard .testing.JsonHelpers.*; Testing (Fixtures) ! jsonFixture(“fixtures/person.json”) ! fromJson(myFixture, Person.class) ! asJson(person)
36. Testing (Resources) client().resource(“user/1”).get(User.class) public class MyTest extends ResourceTest { ! @Override protected void setUpResources() { addResource(...); } }
37. Views Data Access Authentication Migrations Banners etc… More Other Things & Stuff
38. Dropwizard production ready restful web services…