Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Spring Method Injection with Java Configuration

DZone's Guide to

Spring Method Injection with Java Configuration

· Java Zone ·
Free Resource

Verify, standardize, and correct the Big 4 + more– name, email, phone and global addresses – try our Data Quality APIs now at Melissa Developer Portal!

Last week, I described how a Rich Model Object could be used with Spring using Spring’s method injection from an architectural point of view.

What is missing, however, is how to use method injection with my new preferred method for configuration, Java Config. My start point is the following, using both autowiring (<shudder>) and method injection.

public abstract class TopCaller {
 
    @Autowired
    private StuffService stuffService;
 
    public SomeBean newSomeBean() {
 
        return newSomeBeanBuilder().with(stuffService).build();
    }
 
    public abstract SomeBeanBuilder newSomeBeanBuilder();
}

Migrating to Java Config requires the following steps:

  1. Updating the caller structure to allow for constructor injection
  2. For method injection, provide an implementation for the abstract method in the configuration class
  3. That’s all…

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
 
@Configuration
public class JavaConfig {
 
    @Bean
    public TopCaller topCaller() {
 
        return new TopCaller(stuffService()) {
 
            @Override
            public SomeBeanBuilder newSomeBeanBuilder() {
 
                return someBeanBuilder();
            }
        };
    }
 
    @Bean
    public StuffService stuffService() {
 
        return new StuffService();
    }
 
    @Bean
    @Scope(BeanDefinition.SCOPE_PROTOTYPE)
    public SomeBeanBuilder someBeanBuilder() {
 
        return new SomeBeanBuilder();
    }
}

Developers! Quickly and easily gain access to the tools and information you need! Explore, test and combine our data quality APIs at Melissa Developer Portal – home to tools that save time and boost revenue. Our APIs verify, standardize, and correct the Big 4 + more – name, email, phone and global addresses – to ensure accurate delivery, prevent blacklisting and identify risks in real-time.

Topics:

Published at DZone with permission of

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}