All language subtitles for 025 Bean Lifecycle Methods - Coding_en

Instructor: All righty, let's get started.

So we'll do our normal housekeeping work.

And let's move in here to our file system

and we'll copy this directory, 07-bean-scopes,

and we'll paste it and we'll give it a new name.

And the new name we'll give it is 08-bean-lifecycle-methods.

And let's go ahead and open this project in IntelliJ.

And one thing I'd like to do here is just some cleanup work.

I'd like to change the code to inject only one coach

and to use singleton scope.

Just want to kind of keep it simple.

Give me some good baseline code to work with.

I'll move into the DemoController,

expand my window here for a second,

and I'll remove one of the coaches here.

So I'll remove this anotherCoach field.

And then I'll also move down here

and remove the qualifier for theAnotherCoach.

And fix the curly brace here.

Remove this line with the assignment.

And so this is kind of what my constructor should look like

for the DemoController.

And then this GetMapping for check,

we'll go ahead and delete this section of code also.

All right, so this is basically what our application

should look like or our coach should look like

at this point.

And then I'd also like to go over

and make the change here to CricketCoach.

And so I want to remove the prototype scope.

So I'll just delete this Scope annotation here.

All righty. So this looks pretty good.

And then we can kind of get down to business here.

So step one of defining the methods for init and destroy,

and then adding the annotations here

for @PostConstruct and @PreDestroy.

I'll just write some quick comments here to myself

just to kind of keep myself on track.

Okay, this is our basic game plan here

defining our init method

and also defining our destroy method.

So I'll start here with the init method

and I'll make use of the annotation PostConstruct.

I give a method here, doMyStartupStuff.

Again, you can use any method name here that you want.

And then I'll just do a little print line statement here

just to let them know that hey,

we're in doStartupStuff for a given class.

Alrighty, this looks pretty good for our PostConstruct.

So this is our init method.

Let's kind of copy-paste this

and let's do a similar thing here for PreDestroy.

So I'll just paste it.

I'll update the annotation PreDestroy.

And then I'll just move down here

and just give it a new method name, doMyCleanupStuff.

Let's update our print line accordingly.

And that's the coding there for our destroy method.

It looks good. I like it.

Now let's go ahead and test this out.

Let's just run our application.

Our app is up and running.

And one thing to notice here,

we see the code or the execution of our init method here.

So in doMyStartupStuff for CricketCoach.

So notice the previous line,

we're in the constructor for CricketCoach

and then we have our custom init method that runs

as a PostConstruct.

So this is great. I like it.

Now if I stop the application,

then we should execute our PreDestroy method.

So we're gonna just stop, scroll down a bit,

and then we'll see that this print line here

in doMyCleanupStuff.

So this code is actually executing as desired.

So this was great. I like it.

Good job.