Rocket

Launch system that allows methods to be invoked in phases to make sure all dependencies are satisfied.

Features

• Custom phases
• Builder-style

Installation

Using Maven

Add the following to your pom.xml-file:

<dependency>
    <groupId>com.github.pyknic</groupId>
    <artifactId>rocket</artifactId>
    <version>1.0.0</version>
</dependency>

Using Gradle

Add the following to your build.gradle-file:

compile group: 'com.github.pyknic', name: 'rocket', version: '1.0.0'

Usage

The launch system follows a builder pattern where the two interfaces Rocket and RocketBuilder are central.

Configuration

The builder pattern allows Rocket to be built by appending types available for launching. If the dependency graph is incomplete or contains cyclic dependencies when the RocketBuilder.build()-method is invoked, then an RocketException is thrown.

// Create a new Launcher with a number of instances.
Rocket rocket = Rocket.builder(Phase.class)
    .with(foo)
    .with(bar)
    .with(baz)
    .build();

Define Phases

Phases are defined by creating an enum class and passing it to the Rocket.builder(...)-method.

// Define an enum with three phases.
enum Phase {
    INIT,
    UPDATE,
    DESTROY
}

Add Action

Actions can be added to a class by adding the @Execute-annotation to the method. If the method takes any parameters, they will be injected automatically. Methods with the same phase will be invoked in a order that guarantees that all the arguments have already passed that stage.

class ExampleComponent {

    @Execute("init")
    void onInit() {
        ...
    }
    
    @Execute("update")
    void onUpdate(OtherComponent other) {
        ...
    }

}

License

Copyright 2017 Emil Forslund

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.