Spring Java Exception Listener without web

Question

I want to catch all exceptions/errors that occur in my application.
Therefor I searchd on stackoverflow and stubled over this question: Java Exception Listener
Now I am wondering if this can be accomplish in a better way.

My current application:
I am using the Spring framework with the Spring JPA in an standalone code without the web component. I have a Config.java file with the four main Beans:

Time Weaver
Data Source
entity Manager Factory
transaction Manager

I now thought that I could maybe use something like the following:

package me.test;

import java.beans.ExceptionListener;
import org.springframework.stereotype.Component;

@Component
public class ErrorListener implements ExceptionListener {
    @Override
    public void exceptionThrown(Exception e) {
        System.out.println("Some error occured ... That's bad :(");
    }
}

I am not really sure if this ExceptionListener works like I want him to work, so I thought maybe someone can explain to me if what I want is possible or not.
Maybe not with this Listener but with an other method?

Also a other general Question:
How do I register an Listener in general? Isn't there also a @EventListener anotation? Do I have to put this before an method and then let it scan by spring as a part of a Component?
Or do I have to register it manually in my context?

Thanks :)

--- EDIT ---

The idea with the AfterThrowing seems very nice (see comments below). Now my project is like the following:

in the Main:

new AnnotationConfigApplicationContext(Config.class);

Config.java

@EnableTransactionManagement
@ComponentScan("me.test.*")
@Configuration
@EnableJpaRepositories
@EnableAspectJAutoProxy
public class Config {
    @AfterThrowing(pointcut = "execution(public * *(..)", throwing = "ex")
    public void doRecoveryActions(DataAccessException ex) {
        System.out.println("Error found");
    }
    /* loadTimeWeaver, dataSource, entityManagerFactory and transactionManager with the "@Bean" annotation */
}

And then in an random file something that throws an error like int i2 = 5 / 0; and in an other class throw new Exception("test");.
But unfortunately it is nor working :(
What am I doing wrong?

Nitin Prabhu · Accepted Answer · 2016-02-14 00:18:14Z

1

You may use Spring AOP Advice for this where you would use after throwing advice.

answered Feb 14, 2016 at 0:18

Nitin Prabhu

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11 Comments

toddeTV Over a year ago

I already thought about it, but the @Around needs a function as parameter. So how can I accomplish to get a function, that is executed whenever a exception is thrown, no matter where?

Nitin Prabhu Over a year ago

What you can do is as below <code> @Aspect public class AfterThrowingExample { @AfterThrowing( pointcut="execution(public * *(..)", throwing="ex") public void doRecoveryActions(DataAccessException ex) { // ... } }</code>

Nitin Prabhu Over a year ago

Basically if any public method throws exception execute the advice method.You can change the pointcut as per your requirement

toddeTV Over a year ago

ok, that sounds great. thanks :) but now I have two more questions: first, is there a ) missing? "execution(public * *(..))" the last one ... or is it correct without the clip? and second: how do I integrate this class in my spring project? on all tutorials there is an xml file (servlet, web, ...) but I do not have any of these. I did all in pure java without such configs.

Nitin Prabhu Over a year ago

1.I don't think so there is missing ')'.However you will get to know when you execute the program. 2.In spring you can provide meta information in two ways either by xml or annotation.If you do not have any xml config then you can use annotation to use Aspect. You can do it as belowcode @EnableAspectJAutoProxy does the job it is used with @Configuration @Configuration @EnableAspectJAutoProxy public class AspectJAutoProxyConfig{..}

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