lecousin.net Java framework - injection

Dependency injection functionalities

License	License Apache 2.0
Categories	Categories Net
GroupId	GroupId net.lecousin.framework
ArtifactId	ArtifactId injection
Last Version	Last Version 0.2.1
Release Date	Release Date Nov 25, 2018
Type	Type jar
Description	Description lecousin.net Java framework - injection Dependency injection functionalities
Project URL	Project URL https://github.com/lecousin/java-framework-injection
Source Code Management	Source Code Management https://github.com/lecousin/java-framework-injection

Download injection

Filename	Size
injection-0.2.1.pom
injection-0.2.1.jar	34 KB
injection-0.2.1-sources.jar	17 KB
injection-0.2.1-javadoc.jar	98 KB
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How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/net.lecousin.framework/injection/ -->
<dependency>
    <groupId>net.lecousin.framework</groupId>
    <artifactId>injection</artifactId>
    <version>0.2.1</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/net.lecousin.framework/injection/
implementation 'net.lecousin.framework:injection:0.2.1'

Gradle Kotlin

// https://jarcasting.com/artifacts/net.lecousin.framework/injection/
implementation ("net.lecousin.framework:injection:0.2.1")

Apache Buildr

'net.lecousin.framework:injection:jar:0.2.1'

Apache Ivy

<dependency org="net.lecousin.framework" name="injection" rev="0.2.1">
  <artifact name="injection" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='net.lecousin.framework', module='injection', version='0.2.1')
)

Scala SBT

libraryDependencies += "net.lecousin.framework" % "injection" % "0.2.1"

Leiningen

[net.lecousin.framework/injection "0.2.1"]

Dependencies

compile (1)

Group / Artifact	Type	Version
net.lecousin : core	jar	0.15.0

test (3)

Group / Artifact	Type	Version
net.lecousin : core	test-jar	0.15.0
junit : junit	jar	4.12
org.apache.commons : commons-math3	jar	3.2

Project Modules

There are no modules declared in this project.

lecousin.net - Java framework - Injection

This library provides dependency injection functionalities.

It depends on the net.lecousin.core library mainly for parsing configuration files.

An object to inject can be a singleton, or using a factory. When using a factory, a new object is created by the factory each time it needs to be injected.

When an object needs to be injected, it can be injected

by ID: by specifying the ID of the object or the factory
by type: we look for an object matching the given type, and inject it

In addition, conditions can be given to specify when an injectable object (or factory) is eligible, based on properties. For example, a production implementation can be injected when a property is set to 'PROD', else a mock implementation can be injected.

An injectable object can also declare an initialization method to be called once it is instantiated and its dependencies have been injected if any.

Injection is done in an Injection Context, a context being composed of:

Properties, that can be used in a configuration file or in the @InjectableWhen annotation
Singletons, which are instances of objects ready to be injected
Factories, which can be used to create an instance each time an object needs to be injected
An optional parent context. If it has a parent, a context inherits from its content.