Hi Ashley,
can you please identify the calling context of the save() method?
My wild guess is that it is called within JVM shutdown. By default
JaCoCo also writes execution data in a shutdown thread. In this case it
is not deterministic which is executed first.
Regards,
-marc
On 2017-09-25 10:45, 'Ashley Breen' via JaCoCo and EclEmma Users wrote:
> Hi,
>
> I have a Spring boot project that I am trying to generate code coverage for.
> I found that the code coverage percentage reported goes up and down when
> running code coverage multiple times.
> When I investigated further, noticed that a method in my Spring component
> that is annotated with @PreDestroy is sometimes partly covered, sometimes not
> at all (see attached image)
>
> @PreDestroy
> public void save() {
>
> LOGGER.debug("Repository.save() called");
> LOGGER.debug("Repository.save() called 1");
> LOGGER.debug("Repository.save() called 2");
>
> if (null == _items)
> return;
> LOGGER.debug("Repository.save() called 3");
> try{
> LOGGER.debug("Repository.save() called 4");
> ObjectMapper mapper = new ObjectMapper();
> LOGGER.debug("Repository.save() called 5");
> mapper.writeValue(new File(_registrationFileName), _items);
> LOGGER.debug("Repository.save() called 6");
>
> } catch (Exception ex) {
> LOGGER.debug("Repository.save() called 7");
> LOGGER.error(ex.getMessage());
> LOGGER.debug("Repository.save() called 8");
> LOGGER.error(ex.getStackTrace().toString());
> LOGGER.debug("Repository.save() called 9");
>
> }
> LOGGER.debug("Repository.save() called 10");
> }
>
> When I add log statements to check if the method is executed to the end, I
> can see the log statements in the console in STS(Eclipse) but the code is
> reported as not covered (or one or 2 lines are covered).
> The console also reports that the PreDestroy method is being executed on
> Thread-4, not the main thread.
>
> 2017-09-25 09:36:07.962 INFO 19780 --- [ main]
> .o.R.RegistrationServiceApplicationTests : Started
> RegistrationServiceApplicationTests in 4.615 seconds (JVM running for 7.177)
> 2017-09-25 09:36:08.110 INFO 19780 --- [ Thread-4]
> o.s.w.c.s.GenericWebApplicationContext : Closing
> org.springframework.web.context.support.GenericWebApplicationContext@4bf8b77:
> startup date [Mon Sep 25 09:36:04 BST 2017]; root of context hierarchy
> 2017-09-25 09:36:08.370 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called
> 2017-09-25 09:36:08.371 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 1
> 2017-09-25 09:36:08.371 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 2
> 2017-09-25 09:36:08.371 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 3
> 2017-09-25 09:36:08.371 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 4
> 2017-09-25 09:36:08.371 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 5
> 2017-09-25 09:36:08.426 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 6
> 2017-09-25 09:36:08.426 DEBUG 19780 --- [ Thread-4]
> c.n.o.R.repository.Repository : Repository.save() called 10
>
> What settings am I missing to make JaCoCo include this method in it's code
> coverage calculations?
>
> I am using JaCoCo plugin version 0.7.9, Maven 3.3.9, Spring 4.3.8.
> I see the same inconsistent results when I run from the command line.
>
> Thanks,
> Ashley
>
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