Spring Boot application dependency library fails-CodePudding

I have a Spring Boot application ( created in http://start.spring.io -JDK8, Spring Boot 2.6.6 ). I am able to build it and start it.

I added a dependency to the existing library :

<dependency>
    <groupId>com.connect_responsibilitymgr_services</groupId>
    <artifactId>connect-responsibilitymgr-services</artifactId>
    <version>1.0.0</version>
</dependency>

In my implementation I got an instance of the class defined in the dependent library :

ToolkitApi toolkitApi = new ToolkitApi();
UserProfile profile = toolkitApi.getUserProfile("123456");

I am getting a NullPointerException inside the implementation of "getUserProfile":

public UserProfile getUserProfile(String id) throws Exception {
        
        try {
            HttpHeaders headers = new HttpHeaders();            
            headers.set("toolkit-token",
                    CryptoUtils.decrypt(**toolkitConfiguration**.getClientToken(), **toolkitConfiguration**.getEncryptedKey()));

where "toolkitConfiguration" is not instantiated. It's NULL;

In ToolkitApi implementation Bean is being Autowired :

@Controller
public class ToolkitApi {

    private static final Logger log = LoggerFactory.getLogger(ToolkitApi.class);

    @Autowired
    private GISToolConfiguration.ToolkitConfigInfo toolkitConfiguration;

....

@Bean
    @ConfigurationProperties("toolkit")
    ToolkitConfigInfo toolkitConfigInfo() {
        return new ToolkitConfigInfo();
    }

    public static class ToolkitConfigInfo {
        
        private String hostname;
        
        private String port;
        
        private String clientToken;
        
        private String encryptedKey;

all the properties of the ToolkitConfigInfo are defined in "application.properties" and I am able read them. So my "GISToolConfiguration.ToolkitConfigInfo toolkitConfiguration" is never getting instantiated. I am new to Spring Boot and to me it looks like a Bean in dependent library is not getting instantiated for whatever reason. What could be a problem?

CodePudding user response：

You are instantiating your toolkitApi with new:

ToolkitApi toolkitApi = new ToolkitApi();

There Spring DI cannot inject the toolkitConfiguration. Let Spring inject you that toolkitApi where you use it.