Crackerjack

What is it?

Crackerjack is a Groovy-based amalgamation of common nice-to-haves when building Dropwizard-based RESTful services.

Includes utilities for both API and UI-based services.

Currently targets Dropwizard 0.7.1.

Usage:

<repositories>
    <repository>
        <id>crackerjack-mvn-repo</id>
        <name>Crackerjack</name>
        <url>https://raw.github.com/ajordens/crackerjack/mvn-repo/</url>
        <releases>
            <enabled>true</enabled>
        </releases>
        <snapshots>
            <enabled>true</enabled>
            <updatePolicy>always</updatePolicy>
        </snapshots>
    </repository>
</repositories>

Includes:

• Simple Camel and Quartz components.

• Simple Guava RateLimiter-based Throttle.

• BaseViewModel support for asynchronous data retrieval.

    def viewModel = new BaseViewModel("view.ftl", [
        "future1": [call: {
            (1..10).each { Thread.sleep(100) }
            return "future1"
        }] as Callable,
        "future2": [call: {
           (1..2).each { Thread.sleep(400) }
           return "future2"
       }] as Callable
    ])
  
    long startTime = System.currentTimeMillis()
    assert viewModel.getData().get("future1").toString() == "future1"
    assert viewModel.getData().get("future2").toString() == "future2"
    long endTime = System.currentTimeMillis()
  
    // expected to be significantly < cumulative sleep time
    assert (endTime - startTime) < 1200
  

• Codenarc integration.

Work In Progress:

• A (very) preliminary experiment combining Hazelcast with a JDK dynamic proxy to cache API responses.