Spring Boot - set value from an external properties file

Question

I have an external location set on my application.properties as below

spring.config.location=file:${catalina.home}/conf/app.properties

app.properties has a property as timeOut=10000. There are many other properties as well.

I need to set this property on my session something like this:

 session.setMaxInactiveInterval(timeOut_Property);

How can this be achieved?

Adding Controller:

@Controller
public class StartController  {

@Value("${spring.config.location.defaultTimeout}")
private int defaultTimeout;

@RequestMapping("login.do")
public String login(HttpServletRequest request, HttpSession session, Model model) {     
    session.setMaxInactiveInterval(defaultTimeout);     
    return null;        
}

Possible duplicate of [How to access a value defined in the application.properties file in Spring Boot](https://stackoverflow.com/questions/30528255/how-to-access-a-value-defined-in-the-application-properties-file-in-spring-boot) — Emil Hotkowski, May 25 '17 at 11:11
@Rjiuk That is probably when there is a single property defined. — Reema, May 25 '17 at 11:18
Have you tried it ? I am pretty sure it works as well with one as with many properties files — Emil Hotkowski, May 25 '17 at 11:19
It gives the below exception: nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'timeOut' in value "${timeOut}" Have tried with ${spring.config.location}, ${spring.config.location.timeOut} as well — Reema, May 25 '17 at 11:26
can you give your main app code? where you import your properties for spring-boot? — Emil Hotkowski, May 25 '17 at 11:28
Looks like you haven't added your properties file which has timeOut value. — Emil Hotkowski, May 25 '17 at 11:37
Import your custom property file in main class like @PropertySource(name = "general-properties", value = { "classpath:path to your app.properties"}) public class MainApplication { } — Afridi, May 25 '17 at 11:42
@Rjiuk Added controller code. The properties file is in place — Reema, May 25 '17 at 11:51
@Rjiuk I was deploying using Spring Boot app and not tomcat - that's why it couldnt find tomcat directory. My bad! Plus the PropertySource as mentioned by Afridi — Reema, May 25 '17 at 14:51

score 0 · Answer 1 · answered May 25 '17 at 11:14

0

You can annotate the variable with this property in the class as:

@Value("${timeOut}")
private String timeOut;

Use this variable to set session inactive interval as:

session.setMaxInactiveInterval(timeOut);

answered May 25 '17 at 11:14

kk.

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Afridi · Accepted Answer · 2017-05-25T12:31:29.170

Your Main Application class should look like this:

@SpringBootApplication
@PropertySource(name = "general-properties", value = { "classpath:path to your app.properties"})
public class MainApplication {

    public static void main(String[] args) {
        SpringApplication.run(NayapayApplication.class, args);
    }
}

And change your controller to:

@Controller
public class StartController  {

    @Value("${timeOut}")
    private int defaultTimeout;

    @RequestMapping("login.do")
    public String login(HttpServletRequest request, HttpSession session, Model model) {     
        session.setMaxInactiveInterval(defaultTimeout);     
        return null;        
    }
}

Spring Boot - set value from an external properties file

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