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Questions tagged [spring-ioc]

The Spring IoC is a core component of the Spring Framework. It enforces the dependency injection pattern for beans, making them loosely coupled and allowing application developers to code with abstractions.

The Spring IoC (Inversion of Control) is a core component of the Spring Framework. It enforces the dependency injection pattern for beans, making them loosely coupled and allowing application developers to code with abstractions.

It is a process whereby objects define their dependencies only through constructor arguments, factory method arguments, and properties to be set on the object after it is constructed. The container then injects those dependencies when it creates the bean.

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Spring IoC: Conditional Injection in run time

How can I conditionally inject a bean externally using the framework ( not creating a factory class)? In below scenario both childBeans will be instantiated already while but injected into parent bean in run time based on condition.
Naren Karanam
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why spring injects highest parameterized constuctor in case of constructor autowire mode

Can anybody tell me please why Spring container injects the dependency by highest parameterized constructor in case of constructor autowiring mode. why it is not choosing even single argument parameterized constructor present.
Nalla Srinivas
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Spring autowire failed accross multiple layers

While i am trying to develop webapi with spring dao,aop .i am unable to wire dependencies.below is my code ,kindly somebody help me to resolve this. Project folder structure :- EmployeeDAOImpl.java :- package com.emp.dao; @Repository public…
Murugesan Era
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How to register collection of beans with application context and make eligible for autowiring?

I would like to create dynamic list of Spring managed beans in my @Configuration annotated AppConfig: @Bean List createSomeObjects(@Value("${object.count}") final int objectCount) { List objects = new ArrayList<>(); for…
Fritz Duchardt
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how to load more than one xml bean files in spring IOC

how to load more than one bean xml configuration file in springIOC container(either in BeanFactory or in AppilcationContext).
user2663609
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How do I reference the ApplicationEventPublisher in SpEL?

I am wanting to publish an application event using ApplicationEventPublisher#publishEvent() from a Spring Web Flow step. The publisher is usually the application context, but I'd rather not make that assumption unless necessary (particularly for…
chrylis -cautiouslyoptimistic-
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Spring configuration issue with abstract parent class and child class

I am trying to get the following code to work. Basically i have a table called alert_settings in a mysql database. Below is how i configured it and the classes.
DJR
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Spring 4 with caching and generic type autowiring

I'm using the latest version of Spring and I'm getting startup errors when I attempt to inject the same generic type twice and the generic type's implementation uses caching. Below is the simplest example I can create to duplicate the error. //…
Andrew Ferk
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Spring - Unable to instantiate a component object in request scope

I'm trying instantiate a component object for which I declared the entry in applicationContext.xml. The flow to instantiate my target component class is as follows CalculateController -> CalculateService ->…
gopal
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Spring : XML Configuration Location

I am learner of spring have build my test project with spring IOC container and have configure beans.xml in my project root path and load into my application and get bean from it. spring.xml in project root directory BeanFactory bean = new…
T.Malik
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spring , LocalDate , java8 ,arrayindexoutofboundsException

LocalDate instantiation in Springbean using Application context is throwing an ArrayIndexOutofBoundsException package app; import java.time.LocalDate; import org.springframework.context.ApplicationContext; import…
Shiva Garg
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Service Layer don't auto wire DAO using EntityManager

I have the following code in my DAO: @Repository public class PedidoDAO { private static final Logger logger = Logger.getLogger(PedidoDAO.class); @PersistenceContext private EntityManager manager; public List getPedidos()…
user3333944
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Having Spring's IoC container instantiate beans with zero config (like Google Guice's behaviour)

I have a hobby-project which I would like to migrate to Spring. As an example I have the following classes: public class OtherBean { public void printMessage() { System.out.println("Message from OtherBean"); } } public class…
Alexandre Pretyman
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Losing autowired attributes after executed the interceptor from Spring AOP

After a lot of time waste trying to find a answer, I decided to post this doubt. I have a class that I would like to intercept by the Spring AOP. ObjectToBeProxied.java package com.ee.beans; @Service @Component @Transactional public…
heber gentilin
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Why @Autowired fails in constructor and not in instance variable in a WebMvcConfigurerAdapter subclass

I am working through Spring MVC and I have many Formatter classes, something like this @Component public class DeporteFormatter implements Formatter { ... @Autowired public DeporteFormatter(SomeDependency someDependency){ …
Manuel Jordan
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