Spring Condition not able to read value from property file

Question

I am trying to implement Spring Condition org.springframework.context.annotation.Conditionas follows:

public class APIScanningDecisionMaker impl         


        

Answer 1

Maybe spring doesn't know the file ?

This can be fix on annotated your class where the @Value("${swagger.scanner.can.run}")is used :

@PropertySource(value="classpath:config.properties")

Regards,

Answer 2

this works fine for me

public boolean matches(ConditionContext conditionContext, AnnotatedTypeMetadata annotatedTypeMetadata) {
    try {
        InputStream i = conditionContext.getResourceLoader().getResource("prop.file").getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(i));
        StringBuilder out = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            out.append(line);
        }
        System.out.println(out.toString());

    } catch (IOException e) {
        e.printStackTrace();
    }

    return true;
}

Answer 3

---

The object of class implementing "Condition" is created via constructor from Spring, so you can not inject values using @Value annotation. You can do something like below in your code:

@Override        
public boolean matches(
ConditionContext arg0, 
            AnnotatedTypeMetadata arg1) {       
        String prop = conditionContext.getEnvironment()
                 .getProperty("arg0");   
//further code   
     }    

Answer 4

If you add @Conditional to config class then APIScanningDecisionMaker should implement ConfigurationCondition. And don't forget to add @PropertySource to config class.

import org.springframework.context.annotation.ConfigurationCondition;

public class APIScanningDecisionMaker implement ConfigurationCondition {
    @Override
    public ConfigurationPhase getConfigurationPhase() {
        return ConfigurationPhase.REGISTER_BEAN;
    }
}

Properties will have been loaded in ConfigurationPhase.REGISTER_BEAN phase.

If you use @Conditional for methods then you could implement Condition.