Myujth

Having worked on a production Spring boot project since almost a year, I am still having a tough time resolving dependencies in a Spring boot project.

Redis read/write is working fine for one module in our project. All I am trying to do, is to implement it in another. I followed the working module.

Following is pom of the working module (where the @Component is defined) -

Module 1's pom -

<dependencyManagement>
 <dependencies>
 <dependency>
 <groupId>com.someproject.dependencies</groupId>
 <artifactId>someproject-spring-dependencies</artifactId>
 <version>1.0-SNAPSHOT</version>
 <scope>import</scope>
 <type>pom</type>
 </dependency>
 </dependencies>
 </dependencyManagement>
 <dependencies>
 <dependency>
 <groupId>$project.groupId</groupId>
 <artifactId>someproject-common</artifactId>
 <version>$project.version</version>
 <exclusions>
 </dependency>
</dependencies>

In pom of someproject-spring-dependencies -

<redis.clients.jedis.version>2.7.3</redis.clients.jedis.version>
<dependency>
 <groupId>redis.clients</groupId>
 <artifactId>jedis</artifactId>
 <version>$jedis.version</version>
 </dependency>

And in pom of someproject-common -

<dependency>
 <groupId>redis.clients</groupId>
 <artifactId>jedis</artifactId>
 <type>jar</type>
 <scope>compile</scope>
 </dependency>

I am not sure which of these jedis definitions actually works.

The pom of module 2 is similar to module 1. However, when I try to do the following, in the @Component annotated class of module 2, I get null against object of Autowired RedisDao object, which seems to be a wrapper implementation around the redis.clients package. Trying to give an idea of the same -

• RedisDAOImpl implements RedisDAO. RedisDAOImpl has @Autowired RedisTemplate.


• 
  

  RedisTemplate, another wrapper extends RedisBase. RedisBase implements DisposableBean and has autowired JedisPool, which is within package redis.clients.jedis. RedisTemplate has following call -

  
  
  

  Jedis jedis = this.jedisPool.getResource();

  
  



• Jedis is in package redis.clients.jedis.



• jedisPool is of type JedisPool, annotated as autowired.


• JedisPool is in package package redis.clients.jedis.

Following is the code in the component of module 2, for which the auto wiring seems to be failing -

import com.citruspay.prepaid.common.cache.settings.RedisDAO;

@Component
public class CachedWithdrawalTxnRepository implements CachedWithdrawalTxnDao {
 private static final Logger logger = LoggerFactory.getLogger(CachedWithdrawalTxnRepository.class);

 @Autowired RedisDAO redis;

@Override
public void create(String uuid) 
 // TODO Auto-generated method stub
 try
 
 redis.setex("withdrawal:"+uuid, 300, "true");
 
 catch(Exception ex)
 
 logger.error(ex.getMessage());
 

The redis object shows null and I get a null pointer exception.
I am not sure how to debug further.

Update

Answering @Grinish Nepal -

The parent package is being component scanned in the App.java class which is annotated with @SpringBootApplication -

@ComponentScan("com.someproject")

The class where I am Autowiring RedisDAO is in package com.someproject.prepaid.common.cache.redis
and RedisDAO is in package package com.someproject.prepaid.common.cache.settings.