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Instructor: Well, everything's working just fine,
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but hey, let's go ahead and break it on purpose.
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I wanna see how Spring can handle things if I change up
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some of the packages or move things around a bit.
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Let's go ahead and select the Java folder in the list here
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and we're gonna create a new package.
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And the name of the new package,
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I'll call it, com.luv2code.util.
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And so, the important thing to notice
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is that it's not a sub-package of our Spring core demo.
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It's outside of that.
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So, we may have some issues
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with some of our default component scanning.
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And what I'll do here is I'll move into the Spring core demo
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common package and I will move coach and cricket coach
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to this new util package that I just created.
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(no sound)
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Okay, so that looks okay so far.
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Now, notice our main Spring Boot application
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is under Spring core demo.
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So, Spring will scan everything in this package
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and any sub-packages, but by default
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Spring will not component scan this new package here
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that I created, com.luv2code.util.
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So, let's go ahead and test this out and see what happens.
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Ah, application failed to start.
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Okay.
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A parameter of constructor demo controller required
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of being of love to code util coach,
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but could not be found, hmm.
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Because it, just it's not part
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of the default component scanning.
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It's just that just won't work.
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And so you're like, gosh, what's going on here?
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Well now, we need to explicitly tell Spring Boot
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how to find these other packages out there.
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And so, we can accomplish that by editing
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our Spring cord demo application
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and updating the annotation Spring Boot application.
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Inside of here, I'll explicitly list
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the base packages to scan.
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So, I give scan base packages
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and then I simply set up a common delimited list
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of the packages that I want it to scan.
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So, I give com.luv2code Spring core demo,
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and then, I also give com.luv2code.util.
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So, remember, by default of the only component scan
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Spring core demo, but we have this util,
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so we have to list both of those here.
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Let's go ahead and run this and test it out,
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and yay, the issue's resolved.
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So, the application actually starts up successfully.
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We don't have the problem that we had before.
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And then, we can test this in our browser
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by hitting this endpoint and just doing a reload on it
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and we get the data back as desired,
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so it's able to find everything.
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It's able to perform the injection
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and we're all set up because we were very explicit here
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by listing out those packages.
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All right, now I'm gonna go ahead and move things back
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to their original packages, just so we can take advantage
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of the default component scanning with Spring Boots.
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So, I'll just grab coach and cricket coach.
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I'll move those back over to the common package.
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And then, this code that I had here, I could delete it,
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or in this case I'll just comment it out,
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kind of leave it around for a little bit
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in case you wanted to refer to it later.
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And then, I'll just use a regular Spring Boot application
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by itself and make use of the default configuration
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the default component scanning,
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and I'll save all that stuff and test it
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and make sure it still works and great.
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So, our app starts up just fine
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and swing over to our browser, do a reload here,
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and the import works out just fine.
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So, we kind of put things back the way
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they were set up originally.
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Alrighty, so this looks really good.
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I'm happy with this.
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I hope you had a good chance here of learning about
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component scanning with Spring Boot,
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the default component scanning,
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and also being explicit with custom packages.
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Alrighty, good job, my friend.
6815
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