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Chat experiments

Send events to users on channel, including sounds

Dropwizard + Gradle = ♥

Based on https://github.com/joelbyrnes/dropwizard-gradle-groovy which is a fork and update of an example project.

Also based on https://github.com/andershedstrom/dropwizard-with-sse for EventSource stuff

Gotchas

You need Gradle 1.1 or higher, otherwise you'll run into a dependency resolution bug.

Just use gradlew script to avoid any such problems.

FatJar

This example is using the Gradle FatJar Plugin which will create a JAR file of the project including all dependencies, similar to the Maven Assembly Plugin or the Maven Shade Plugin.

To create a fat JAR just run gradle fatJar. The resulting JAR will be saved as ./build/libs/dropwizard-gradle-fat.jar.

Shadow

Shadow is a rewrite of the maven shade plugin for Gradle, which is faster than fatJar. I am trying to get this to work instead.

Gradle Application Plugin

An alternative to creating a fat JAR is using the Gradle Application Plugin.

To create a distributable ZIP archive including all dependencies for your application just run gradle distZip. The resulting archive will be saved as ./build/distributions/dropwizard-gradle.zip.

You can also use the run task to start the application.

Server-sent Events

Copied from https://github.com/andershedstrom/dropwizard-with-sse

This is a example project using Dropwizard with Server-sent Events support

Usage

  • Run the app in IDE, or in terminal execute:
$ gradlew run
  • Open a new terminal and execute:
$ curl localhost:8080/sse -H"Accept: text/event-stream"
  • Open yet another terminal and execute:
$ curl localhost:8080/publish?msg=HelloWorld
  • You should see the following i terminal 2:
~ $ curl localhost:8080/sse -H"Accept: text/event-stream"

data: HelloWorld

Problems

  • shadowJar and fatJar have the wav in the jar, and this apparently can't be resolved so sounds can't be accessed? so only distZip works.
  • shadowJar has some kind of class resolution problem, might be fixed later.

Potential improvements

  • make sounds its own dir so shaded jars can be just run in the same root dir, and will serve custom sounds out of it
  • will also automatically find the wavs and list them for playing.
  • add other event types to the channel, eg chat - essentially a basic IRC server with sounds. what more?