dropwizardframework for developing ops-friendly, high-

performance, RESTful web services

обо мне

● Андрей Панфилов● Java Developer

история вопроса

● распространенное мнение: java == кровавый энтерпрайз

● некоторым хочется легкости (не в ущерб преимуществ java)

● dropwizard -- легковесный фреймворк для веб (It's an answer to the complexity of Java Web and Application Containers, which tend to be overkill for 90% of your use-cases.)

об авторе

● Coda Hale (codahale.com)● «I’m a software engineer in Berkeley,

CA.»● Principal Software Developer

(Microsoft), Infrastructure Architect (Yammer)

определение

● Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web services.

● Основная идея: pulls together stable, mature libraries from the Java ecosystem into a simple, light-weight package.

● Название: что такое dropwizard?

комикс

компоненты dropwizard'а

● Jetty for HTTP● Jersey for REST● Jackson for JSON● Metrics for metrics● Guava (highly optimized immutable data structures,

speed up development)● Logback and slf4j for performant logging● Hibernate Validator (JSR-303)● Apache HttpClient and Jersey client (interaction with

other web services)● JDBI or Hibernate● Liquibase● Freemarker or Mustache (simple template system)● Joda Time (handling dates and times)

Jetty

● Incredibly tuned embedded HTTP server.● Running your service as a simple process.● No PermGen issues● No application server configuration and

maintenance● No arcane deployment tools● No ClassLoader troubles● No hidden application logs● No trying to tune a single garbage collector

to work with multiple application workloads

Jersey

● JAX-RS (JSR 311: Java API for RESTful Web Services)

● full-featured RESTful web framework● nothing beats in terms of features and

performance● allows to write clean, testable classes which

gracefully map HTTP requests to simple Java objects

● supports streaming output, matrix URI parameters, conditional GET requests

● and much, much more

Jackson

● lightning fast● has a sophisticated object mapper● allows to export domain models directly

Metrics

● powerful toolkit of ways to measure the behavior of critical components in your production environment

● with modules for common libraries like Jetty, Logback, Log4j, Apache HttpClient, Ehcache, JDBI, Jersey and reporting backends like Ganglia and Graphite, Metrics provides you with full-stack visibility.

hello world

hello world

hello world

hello world

hello world

hello world

hello world

сборка

● Apache Maven● Fat JAR

запуск приложения

java -jar target/hello-world-0.0.1-SNAPSHOT.jar server hello-world.yml

лицензия

● Apache License v2.0

интересности

● Отсутствие IoC● Optional:Optional<Integer> possible = Optional.of(5);possible.isPresent(); // returns truepossible.get(); // returns 5● Immutability

SWOT

● Strengths○ Provisioning○ Deployment○ Monitoring and Logging○ Alerting○ Tend to Service Oriented Architecture○ Loose Coupling

● Weaknesses● Opportunities● Threats

○ Support

ссылки

● dropwizard.codahale.com● github.com/codahale/dropwizard

конец

Вопросы?