Package ninja.utils

Class ImplFromPropertiesFactory<T>

java.lang.Object

ninja.utils.ImplFromPropertiesFactory<T>

public class ImplFromPropertiesFactory<T>
extends Object

An abstract provider that determines which implementation to load based on the value of key in NinjaProperties (aka application.conf). If this variable is set then the implementation class is loaded for subclasses to use in their own implementation of Provider.get().

Constructor Summary

Constructors

Constructor	Description
ImplFromPropertiesFactory(com.google.inject.Injector injector, NinjaProperties ninjaProperties, String propertyName, Class<? extends T> targetClass, String defaultClassName, boolean deferResolveUntilGet, org.slf4j.Logger logger)	Tries to load implementation class defined as a property in NinjaProperties or will fallback to loading the default implementation class or nothing if its not set.

Method Summary

Modifier and Type	Method	Description
T	create()
Class<? extends T>	getImplementationClass()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImplFromPropertiesFactory

public ImplFromPropertiesFactory(com.google.inject.Injector injector,
                                 NinjaProperties ninjaProperties,
                                 String propertyName,
                                 Class<? extends T> targetClass,
                                 String defaultClassName,
                                 boolean deferResolveUntilGet,
                                 org.slf4j.Logger logger)

Tries to load implementation class defined as a property in NinjaProperties or will fallback to loading the default implementation class or nothing if its not set.

Parameters:

injector - The guice injector

ninjaProperties - The ninja properties

propertyName - The name of the configuration property key

targetClass - The target implementation class (e.g. ninja.Cache)

defaultClassName - The default implementation class or null if a default doesn't exist. A string is used here to not require an implementation class to be on the classpath.

deferResolveUntilGet - If false then the implementation class will be resolved in the constructor. If true then the resolution will be deferred until getImplementation() or create() is called.

logger - The logger to use for info and errors

Method Detail

create

public T create()

getImplementationClass

public Class<? extends T> getImplementationClass()