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Welcome, my friends.

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Welcome to the stiction.

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In this section, we will learn about the subject and what all concepts we need to learn revolving around

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the subject container, the container basically is your Puncak Web server, which we are going to use,

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and it hosts the Soviet or the GSB.

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The GSB is just another way of saying that it is a solitary.

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So a GSB gets translated into a servlet and that job is also done by the servlet container.

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We learn about it in some other course on GSB.

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In this course we will be focusing on the Soviet, the Soviet container or the Soviet.

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So what can it do?

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So what exactly does a solid container do, what other things?

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It performs many functions.

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First of all, it manages the life cycle of the sonic.

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It not only hosts the Sonic, but also manages the entire lifecycle of the subject.

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It takes a request from the client.

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The client can be a browser and takes those requests.

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So basically a solid container works as it's also a Web server.

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We have talked about Web server, Tomcat Web server.

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So it takes requests.

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It sends back a response to the client.

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It could be in the form of e-mail or text.

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Right.

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And then it manages might be trading of the server.

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We learn about this a little later.

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More about this a little later in some other section.

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But market trading as such is an ability to do to multitask, to create multiple processors simultaneously.

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It gives the illusion that many things are happening at once.

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So that's what multitracking simply means.

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And it manages this.

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The strong web server manages doing that for the subject.

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And finally, it translates as GSP to a server and runs it on the server.

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So as I have already told you before, that a GSP is essentially a like a GSP gets converted into a

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server and this job is done by Omkara to stand by the server container and it runs also.

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That's Soulik automatically it runs that subnet on the server.

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So you don't know about it that actually a Jaspin GSP has been converted into Soulet.

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It's happening in the background.

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We'll just see how that happens when we go to GSB later.

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We are focused on subnets as of now.

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Callback mechanism.

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So what is a callback mechanism for to.

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This is a very important concept as far as servlet container is concerned, servlet containers make

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a call back to the subject program that you create.

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What does that mean?

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That means that.

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He calls your method the support of the servlet container, called the method that you create nobody

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else.

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You don't call the method.

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It is the of container, it is the Tomcat lipservice that calls the.

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That calls the matter on your servlet.

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So who calls whom?

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Yes, and who was the control?

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The control is with the Tomcat, so and the Bangkok Observer calls the method.

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These are set methods like like the Post, like get like destroy.

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These are standard methods which have to be sensitively written and exactly in the same boat as to be

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written with the same signature Java signature.

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And they will be called by the Tomcats from Carib.

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So that is the main method.

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There is no mean method indeed.

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So yes, that's a fact.

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The servlet doesn't contain any mean main method, but in the Java program, we understand and we know

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that the starting point is always the main method.

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So that is the meaning.

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The mean method is in the contact, which some men in the top over the main method is there.

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So the server runs, the mean method runs, and it makes a callback.

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It makes a call to your method.

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So the main method exists in the.

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Tom Catchlove, as I have already told you, the Tomcat server has the control Life-cycle Manhood's

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standard method scored by the server on your court, as I have already told you before, that life-cycle

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methods are present in the in your servlet, which you create.

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These methods are guarded by the Tomcat.

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So these are standard methods.

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They have a particular syntax, but a particular semantic bit of writing it.

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And you will learn that what that method is and it will be guarded by the server when the lifecycle

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method one by one after one, like, for example, first you will call the service method.

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Then it called the Save the gate method.

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Then it might call the destroy method.

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So there are certain ways in which these things look and we will discuss about this in the later.

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Next, we will see the lifecycle of assembling the lifecycle methods I'm talking about.

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We will now go through the lifecycle.

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What does my lifecycle methods are and in what order do they happen?

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We will see that in the next lecture.

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Thank you very much.