Package org.powertac.common.spring

Class SpringApplicationContext

java.lang.Object

org.powertac.common.spring.SpringApplicationContext

All Implemented Interfaces:

org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware

@Service
public class SpringApplicationContext
extends Object
implements org.springframework.context.ApplicationContextAware

Static methods to access the Spring application context. It is set up as a service so Spring will create and initialize it. NOTE: These methods should NOT be used in constructors. Doing so makes it virtually impossible to test with mocks, and makes transitive dependencies very difficult in a test environment. Better to use them in individual "service getter" methods that do nothing for dependencies that have already been satisfied by test code using ReflectionTestUtils.setField(). ALSO NOTE: Even when used outside a constructor, there are still potential problems in a test environment, because if any test in a suite initializes Spring, then later tests that do not initialize Spring can retrieve instances from earlier tests, which may not be what the test expects. This can lead to baffling problems.

Author:

John Collins

Constructor Summary

Constructors

Constructor	Description
SpringApplicationContext()

Method Summary

Modifier and Type	Method	Description
static Object	getBean(String beanName)	Returns the Spring bean, if any, with the given name.
static <T> T	getBeanByType(Class<T> type)	Returns the first Spring bean found that is an instance of the given class.
static org.springframework.context.ApplicationContext	getContext()
static <T> List<T>	listBeansOfType(Class<T> type)	Returns all the Spring beans that are instances of the given type.
static <T> Map<String,T>	mapBeansOfType(Class<T> type)	Returns a map of all the Spring beans that are instances of the given type.
void	setApplicationContext(org.springframework.context.ApplicationContext appContext)

Methods inherited from class java.lang.Object

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

Constructor Details

SpringApplicationContext

public SpringApplicationContext()

Method Details

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext appContext) throws org.springframework.beans.BeansException

Specified by:

setApplicationContext in interface org.springframework.context.ApplicationContextAware

Throws:

org.springframework.beans.BeansException

getBean

public static Object getBean(String beanName)

Returns the Spring bean, if any, with the given name.

getBeanByType

public static <T> T getBeanByType(Class<T> type)

Returns the first Spring bean found that is an instance of the given class.

listBeansOfType

public static <T> List<T> listBeansOfType(Class<T> type)

Returns all the Spring beans that are instances of the given type.

mapBeansOfType

public static <T> Map<String,T> mapBeansOfType(Class<T> type)

Returns a map of all the Spring beans that are instances of the given type.

getContext

public static org.springframework.context.ApplicationContext getContext()