Dropwizard Java 8 Bundle

An addon bundle and a set of classes for using Java 8 features like Optional<T> and the new Date/Time API (JSR-310) in a Dropwizard application.

Currently it supports Java 8 versions of dropwizard-auth and dropwizard-jdbi.

Usage

Just add Java8Bundle to your Application class as described in the manual in the Bundles paragraph.

Serialization and deserialization

This will add support for Optional<T> to Jersey and support for JSR-310 and Optional<T> to Jackson.

public class DemoApplication extends Application<DemoConfiguration> {
    // [...]
    @Override
    public void initialize(Bootstrap<HelloWorldConfiguration> bootstrap) {
        bootstrap.addBundle(new Java8Bundle());
        // [...]
    }
}

When using ResourceTestRule in unit tests, Java8 providers need to registered to ensure correct behaviour:

public static final ResourceTestRule resources = ResourceTestRule.builder()
    .addResource(new HelloWorldResource())
    .addProvider(OptionalMessageBodyWriter.class)
    .addProvider(OptionalParamFeature.class)
    .build();

JDBI

To get support for Java 8 objects use io.dropwizard.java8.jdbi.DBIFactory

import io.dropwizard.java8.jdbi.DBIFactory;

@Override
public void run(ExampleConfiguration config, Environment environment) {
    final DBIFactory factory = new DBIFactory();
    final DBI jdbi = factory.build(environment, config.getDataSourceFactory(), "postgresql");
    final UserDAO dao = jdbi.onDemand(UserDAO.class);
    environment.jersey().register(new UserResource(dao));
}

When getting a single result use the annotation @SingleValueResult

public interface MyDAO {
    @SingleValueResult
    @SqlQuery("select name from something where id = :id")
    Optional<String> findNameById(@Bind("id") int id);
}

Maven Artifacts

This project is available on Maven Central. To add it to your project simply add the following dependencies to your pom.xml:

<dependency>
  <groupId>io.dropwizard.modules</groupId>
  <artifactId>dropwizard-java8</artifactId>
  <version>0.9.0-1</version>
</dependency>

<dependency>
  <groupId>io.dropwizard.modules</groupId>
  <artifactId>dropwizard-java8-auth</artifactId>
  <version>0.9.0-1</version>
</dependency>

<dependency>
  <groupId>io.dropwizard.modules</groupId>
  <artifactId>dropwizard-java8-jdbi</artifactId>
  <version>0.9.0-1</version>
</dependency>

When using JSR-310 Dates with Hibernate, Jadira UserType Extend needs to be added:

<dependency>
    <groupId>org.jadira.usertype</groupId>
    <artifactId>usertype.extended</artifactId>
    <version>4.0.0.GA</version>
</dependency>

Dropwizard will auto register this in SessionFactoryFactory.

Support

Please file bug reports and feature requests in GitHub issues.

License

Copyright (c) 2014-2015 Jochen Schalanda

This library is licensed under the Apache License, Version 2.0.

See http://www.apache.org/licenses/LICENSE-2.0.html or the LICENSE file in this repository for the full license text.